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kernel_linux
提交 ada19a31 编写于 作者: L Linus Torvalds
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Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq 

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: (35 commits)
  [CPUFREQ] Prevent p4-clockmod from auto-binding to the ondemand governor.
  [CPUFREQ] Make cpufreq-nforce2 less obnoxious
  [CPUFREQ] p4-clockmod reports wrong frequency.
  [CPUFREQ] powernow-k8: Use a common exit path.
  [CPUFREQ] Change link order of x86 cpufreq modules
  [CPUFREQ] conservative: remove 10x from def_sampling_rate
  [CPUFREQ] conservative: fixup governor to function more like ondemand logic
  [CPUFREQ] conservative: fix dbs_cpufreq_notifier so freq is not locked
  [CPUFREQ] conservative: amend author's email address
  [CPUFREQ] Use swap() in longhaul.c
  [CPUFREQ] checkpatch cleanups for acpi-cpufreq
  [CPUFREQ] powernow-k8: Only print error message once, not per core.
  [CPUFREQ] ondemand/conservative: sanitize sampling_rate restrictions
  [CPUFREQ] ondemand/conservative: deprecate sampling_rate{min,max}
  [CPUFREQ] powernow-k8: Always compile powernow-k8 driver with ACPI support
  [CPUFREQ] Introduce /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_transition_latency
  [CPUFREQ] checkpatch cleanups for powernow-k8
  [CPUFREQ] checkpatch cleanups for ondemand governor.
  [CPUFREQ] checkpatch cleanups for powernow-k7
  [CPUFREQ] checkpatch cleanups for speedstep related drivers.
  ...
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Documentation/cpu-freq/governors.txt
浏览文件 @ ada19a31
......@@ -117,10 +117,28 @@ accessible parameters:
sampling_rate: measured in uS (10^-6 seconds), this is how often you
want the kernel to look at the CPU usage and to make decisions on
what to do about the frequency. Typically this is set to values of
around '10000' or more.
show_sampling_rate_(min|max): the minimum and maximum sampling rates
available that you may set 'sampling_rate' to.
around '10000' or more. It's default value is (cmp. with users-guide.txt):
transition_latency * 1000
The lowest value you can set is:
transition_latency * 100 or it may get restricted to a value where it
makes not sense for the kernel anymore to poll that often which depends
on your HZ config variable (HZ=1000: max=20000us, HZ=250: max=5000).
Be aware that transition latency is in ns and sampling_rate is in us, so you
get the same sysfs value by default.
Sampling rate should always get adjusted considering the transition latency
To set the sampling rate 750 times as high as the transition latency
in the bash (as said, 1000 is default), do:
echo `$(($(cat cpuinfo_transition_latency) * 750 / 1000)) \
>ondemand/sampling_rate
show_sampling_rate_(min|max): THIS INTERFACE IS DEPRECATED, DON'T USE IT.
You can use wider ranges now and the general
cpuinfo_transition_latency variable (cmp. with user-guide.txt) can be
used to obtain exactly the same info:
show_sampling_rate_min = transtition_latency * 500 / 1000
show_sampling_rate_max = transtition_latency * 500000 / 1000
(divided by 1000 is to illustrate that sampling rate is in us and
transition latency is exported ns).
up_threshold: defines what the average CPU usage between the samplings
of 'sampling_rate' needs to be for the kernel to make a decision on
......
Documentation/cpu-freq/user-guide.txt
浏览文件 @ ada19a31
......@@ -152,6 +152,18 @@ cpuinfo_min_freq : this file shows the minimum operating
frequency the processor can run at(in kHz)
cpuinfo_max_freq : this file shows the maximum operating
frequency the processor can run at(in kHz)
cpuinfo_transition_latency The time it takes on this CPU to
switch between two frequencies in nano
seconds. If unknown or known to be
that high that the driver does not
work with the ondemand governor, -1
(CPUFREQ_ETERNAL) will be returned.
Using this information can be useful
to choose an appropriate polling
frequency for a kernel governor or
userspace daemon. Make sure to not
switch the frequency too often
resulting in performance loss.
scaling_driver : this file shows what cpufreq driver is
used to set the frequency on this CPU
......
arch/x86/include/asm/timer.h
浏览文件 @ ada19a31
......@@ -11,8 +11,8 @@ unsigned long native_calibrate_tsc(void);
#ifdef CONFIG_X86_32
extern int timer_ack;
#endif
extern int recalibrate_cpu_khz(void);
#endif /* CONFIG_X86_32 */
extern int no_timer_check;
......
arch/x86/kernel/cpu/cpufreq/Kconfig
浏览文件 @ ada19a31
......@@ -87,30 +87,15 @@ config X86_POWERNOW_K7_ACPI
config X86_POWERNOW_K8
tristate "AMD Opteron/Athlon64 PowerNow!"
select CPU_FREQ_TABLE
depends on ACPI && ACPI_PROCESSOR
help
This adds the CPUFreq driver for mobile AMD Opteron/Athlon64 processors.
This adds the CPUFreq driver for K8/K10 Opteron/Athlon64 processors.
To compile this driver as a module, choose M here: the
module will be called powernow-k8.
For details, take a look at <file:Documentation/cpu-freq/>.
If in doubt, say N.
config X86_POWERNOW_K8_ACPI
bool
prompt "ACPI Support" if X86_32
depends on ACPI && X86_POWERNOW_K8 && ACPI_PROCESSOR
depends on !(X86_POWERNOW_K8 = y && ACPI_PROCESSOR = m)
default y
help
This provides access to the K8s Processor Performance States via ACPI.
This driver is probably required for CPUFreq to work with multi-socket and
SMP systems. It is not required on at least some single-socket yet
multi-core systems, even if SMP is enabled.
It is safe to say Y here.
config X86_GX_SUSPMOD
tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation"
depends on X86_32 && PCI
......
arch/x86/kernel/cpu/cpufreq/Makefile
浏览文件 @ ada19a31
# Link order matters. K8 is preferred to ACPI because of firmware bugs in early
# K8 systems. ACPI is preferred to all other hardware-specific drivers.
# speedstep-* is preferred over p4-clockmod.
obj-$(CONFIG_X86_POWERNOW_K8) += powernow-k8.o
obj-$(CONFIG_X86_ACPI_CPUFREQ) += acpi-cpufreq.o
obj-$(CONFIG_X86_POWERNOW_K6) += powernow-k6.o
obj-$(CONFIG_X86_POWERNOW_K7) += powernow-k7.o
obj-$(CONFIG_X86_POWERNOW_K8) += powernow-k8.o
obj-$(CONFIG_X86_LONGHAUL) += longhaul.o
obj-$(CONFIG_X86_E_POWERSAVER) += e_powersaver.o
obj-$(CONFIG_ELAN_CPUFREQ) += elanfreq.o
......@@ -10,7 +15,6 @@ obj-$(CONFIG_X86_GX_SUSPMOD) += gx-suspmod.o
obj-$(CONFIG_X86_SPEEDSTEP_ICH) += speedstep-ich.o
obj-$(CONFIG_X86_SPEEDSTEP_LIB) += speedstep-lib.o
obj-$(CONFIG_X86_SPEEDSTEP_SMI) += speedstep-smi.o
obj-$(CONFIG_X86_ACPI_CPUFREQ) += acpi-cpufreq.o
obj-$(CONFIG_X86_SPEEDSTEP_CENTRINO) += speedstep-centrino.o
obj-$(CONFIG_X86_P4_CLOCKMOD) += p4-clockmod.o
obj-$(CONFIG_X86_CPUFREQ_NFORCE2) += cpufreq-nforce2.o
arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
浏览文件 @ ada19a31
/*
* acpi-cpufreq.c - ACPI Processor P-States Driver ($Revision: 1.4 $)
* acpi-cpufreq.c - ACPI Processor P-States Driver
*
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
......@@ -36,16 +36,18 @@
#include <linux/ftrace.h>
#include <linux/acpi.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/uaccess.h>
#include <acpi/processor.h>
#include <asm/io.h>
#include <asm/msr.h>
#include <asm/processor.h>
#include <asm/cpufeature.h>
#include <asm/delay.h>
#include <asm/uaccess.h>
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "acpi-cpufreq", msg)
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
"acpi-cpufreq", msg)
MODULE_AUTHOR("Paul Diefenbaugh, Dominik Brodowski");
MODULE_DESCRIPTION("ACPI Processor P-States Driver");
......@@ -95,7 +97,7 @@ static unsigned extract_io(u32 value, struct acpi_cpufreq_data *data)
perf = data->acpi_data;
for (i=0; i<perf->state_count; i++) {
for (i = 0; i < perf->state_count; i++) {
if (value == perf->states[i].status)
return data->freq_table[i].frequency;
}
......@@ -110,7 +112,7 @@ static unsigned extract_msr(u32 msr, struct acpi_cpufreq_data *data)
msr &= INTEL_MSR_RANGE;
perf = data->acpi_data;
for (i=0; data->freq_table[i].frequency != CPUFREQ_TABLE_END; i++) {
for (i = 0; data->freq_table[i].frequency != CPUFREQ_TABLE_END; i++) {
if (msr == perf->states[data->freq_table[i].index].status)
return data->freq_table[i].frequency;
}
......@@ -138,15 +140,13 @@ struct io_addr {
u8 bit_width;
};
typedef union {
struct msr_addr msr;
struct io_addr io;
} drv_addr_union;
struct drv_cmd {
unsigned int type;
const struct cpumask *mask;
drv_addr_union addr;
union {
struct msr_addr msr;
struct io_addr io;
} addr;
u32 val;
};
......@@ -369,7 +369,7 @@ static unsigned int check_freqs(const struct cpumask *mask, unsigned int freq,
unsigned int cur_freq;
unsigned int i;
for (i=0; i<100; i++) {
for (i = 0; i < 100; i++) {
cur_freq = extract_freq(get_cur_val(mask), data);
if (cur_freq == freq)
return 1;
......@@ -494,7 +494,7 @@ acpi_cpufreq_guess_freq(struct acpi_cpufreq_data *data, unsigned int cpu)
unsigned long freq;
unsigned long freqn = perf->states[0].core_frequency * 1000;
for (i=0; i<(perf->state_count-1); i++) {
for (i = 0; i < (perf->state_count-1); i++) {
freq = freqn;
freqn = perf->states[i+1].core_frequency * 1000;
if ((2 * cpu_khz) > (freqn + freq)) {
......@@ -673,7 +673,7 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
/* detect transition latency */
policy->cpuinfo.transition_latency = 0;
for (i=0; i<perf->state_count; i++) {
for (i = 0; i < perf->state_count; i++) {
if ((perf->states[i].transition_latency * 1000) >
policy->cpuinfo.transition_latency)
policy->cpuinfo.transition_latency =
......@@ -682,8 +682,8 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
data->max_freq = perf->states[0].core_frequency * 1000;
/* table init */
for (i=0; i<perf->state_count; i++) {
if (i>0 && perf->states[i].core_frequency >=
for (i = 0; i < perf->state_count; i++) {
if (i > 0 && perf->states[i].core_frequency >=
data->freq_table[valid_states-1].frequency / 1000)
continue;
......
arch/x86/kernel/cpu/cpufreq/cpufreq-nforce2.c
浏览文件 @ ada19a31
......@@ -32,7 +32,7 @@
* nforce2_chipset:
* FSB is changed using the chipset
*/
static struct pci_dev *nforce2_chipset_dev;
static struct pci_dev *nforce2_dev;
/* fid:
* multiplier * 10
......@@ -56,7 +56,9 @@ MODULE_PARM_DESC(fid, "CPU multiplier to use (11.5 = 115)");
MODULE_PARM_DESC(min_fsb,
"Minimum FSB to use, if not defined: current FSB - 50");
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "cpufreq-nforce2", msg)
#define PFX "cpufreq-nforce2: "
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
"cpufreq-nforce2", msg)
/**
* nforce2_calc_fsb - calculate FSB
......@@ -118,11 +120,11 @@ static void nforce2_write_pll(int pll)
int temp;
/* Set the pll addr. to 0x00 */
pci_write_config_dword(nforce2_chipset_dev, NFORCE2_PLLADR, 0);
pci_write_config_dword(nforce2_dev, NFORCE2_PLLADR, 0);
/* Now write the value in all 64 registers */
for (temp = 0; temp <= 0x3f; temp++)
pci_write_config_dword(nforce2_chipset_dev, NFORCE2_PLLREG, pll);
pci_write_config_dword(nforce2_dev, NFORCE2_PLLREG, pll);
return;
}
......@@ -139,8 +141,8 @@ static unsigned int nforce2_fsb_read(int bootfsb)
u32 fsb, temp = 0;
/* Get chipset boot FSB from subdevice 5 (FSB at boot-time) */
nforce2_sub5 = pci_get_subsys(PCI_VENDOR_ID_NVIDIA,
0x01EF, PCI_ANY_ID, PCI_ANY_ID, NULL);
nforce2_sub5 = pci_get_subsys(PCI_VENDOR_ID_NVIDIA, 0x01EF,
PCI_ANY_ID, PCI_ANY_ID, NULL);
if (!nforce2_sub5)
return 0;
......@@ -148,13 +150,13 @@ static unsigned int nforce2_fsb_read(int bootfsb)
fsb /= 1000000;
/* Check if PLL register is already set */
pci_read_config_byte(nforce2_chipset_dev, NFORCE2_PLLENABLE, (u8 *)&temp);
pci_read_config_byte(nforce2_dev, NFORCE2_PLLENABLE, (u8 *)&temp);
if (bootfsb || !temp)
return fsb;
/* Use PLL register FSB value */
pci_read_config_dword(nforce2_chipset_dev, NFORCE2_PLLREG, &temp);
pci_read_config_dword(nforce2_dev, NFORCE2_PLLREG, &temp);
fsb = nforce2_calc_fsb(temp);
return fsb;
......@@ -174,18 +176,18 @@ static int nforce2_set_fsb(unsigned int fsb)
int pll = 0;
if ((fsb > max_fsb) || (fsb < NFORCE2_MIN_FSB)) {
printk(KERN_ERR "cpufreq: FSB %d is out of range!\n", fsb);
printk(KERN_ERR PFX "FSB %d is out of range!\n", fsb);
return -EINVAL;
}
tfsb = nforce2_fsb_read(0);
if (!tfsb) {
printk(KERN_ERR "cpufreq: Error while reading the FSB\n");
printk(KERN_ERR PFX "Error while reading the FSB\n");
return -EINVAL;
}
/* First write? Then set actual value */
pci_read_config_byte(nforce2_chipset_dev, NFORCE2_PLLENABLE, (u8 *)&temp);
pci_read_config_byte(nforce2_dev, NFORCE2_PLLENABLE, (u8 *)&temp);
if (!temp) {
pll = nforce2_calc_pll(tfsb);
......@@ -197,7 +199,7 @@ static int nforce2_set_fsb(unsigned int fsb)
/* Enable write access */
temp = 0x01;
pci_write_config_byte(nforce2_chipset_dev, NFORCE2_PLLENABLE, (u8)temp);
pci_write_config_byte(nforce2_dev, NFORCE2_PLLENABLE, (u8)temp);
diff = tfsb - fsb;
......@@ -222,7 +224,7 @@ static int nforce2_set_fsb(unsigned int fsb)
}
temp = 0x40;
pci_write_config_byte(nforce2_chipset_dev, NFORCE2_PLLADR, (u8)temp);
pci_write_config_byte(nforce2_dev, NFORCE2_PLLADR, (u8)temp);
return 0;
}
......@@ -244,7 +246,8 @@ static unsigned int nforce2_get(unsigned int cpu)
* nforce2_target - set a new CPUFreq policy
* @policy: new policy
* @target_freq: the target frequency
* @relation: how that frequency relates to achieved frequency (CPUFREQ_RELATION_L or CPUFREQ_RELATION_H)
* @relation: how that frequency relates to achieved frequency
* (CPUFREQ_RELATION_L or CPUFREQ_RELATION_H)
*
* Sets a new CPUFreq policy.
*/
......@@ -276,7 +279,7 @@ static int nforce2_target(struct cpufreq_policy *policy,
/* local_irq_save(flags); */
if (nforce2_set_fsb(target_fsb) < 0)
printk(KERN_ERR "cpufreq: Changing FSB to %d failed\n",
printk(KERN_ERR PFX "Changing FSB to %d failed\n",
target_fsb);
else
dprintk("Changed FSB successfully to %d\n",
......@@ -327,8 +330,8 @@ static int nforce2_cpu_init(struct cpufreq_policy *policy)
/* FIX: Get FID from CPU */
if (!fid) {
if (!cpu_khz) {
printk(KERN_WARNING
"cpufreq: cpu_khz not set, can't calculate multiplier!\n");
printk(KERN_WARNING PFX
"cpu_khz not set, can't calculate multiplier!\n");
return -ENODEV;
}
......@@ -343,7 +346,7 @@ static int nforce2_cpu_init(struct cpufreq_policy *policy)
}
}
printk(KERN_INFO "cpufreq: FSB currently at %i MHz, FID %d.%d\n", fsb,
printk(KERN_INFO PFX "FSB currently at %i MHz, FID %d.%d\n", fsb,
fid / 10, fid % 10);
/* Set maximum FSB to FSB at boot time */
......@@ -392,17 +395,18 @@ static struct cpufreq_driver nforce2_driver = {
*/
static unsigned int nforce2_detect_chipset(void)
{
nforce2_chipset_dev = pci_get_subsys(PCI_VENDOR_ID_NVIDIA,
nforce2_dev = pci_get_subsys(PCI_VENDOR_ID_NVIDIA,
PCI_DEVICE_ID_NVIDIA_NFORCE2,
PCI_ANY_ID, PCI_ANY_ID, NULL);
if (nforce2_chipset_dev == NULL)
if (nforce2_dev == NULL)
return -ENODEV;
printk(KERN_INFO "cpufreq: Detected nForce2 chipset revision %X\n",
nforce2_chipset_dev->revision);
printk(KERN_INFO
"cpufreq: FSB changing is maybe unstable and can lead to crashes and data loss.\n");
printk(KERN_INFO PFX "Detected nForce2 chipset revision %X\n",
nforce2_dev->revision);
printk(KERN_INFO PFX
"FSB changing is maybe unstable and can lead to "
"crashes and data loss.\n");
return 0;
}
......@@ -420,7 +424,7 @@ static int __init nforce2_init(void)
/* detect chipset */
if (nforce2_detect_chipset()) {
printk(KERN_ERR "cpufreq: No nForce2 chipset.\n");
printk(KERN_INFO PFX "No nForce2 chipset.\n");
return -ENODEV;
}
......
arch/x86/kernel/cpu/cpufreq/e_powersaver.c
浏览文件 @ ada19a31
......@@ -12,12 +12,12 @@
#include <linux/cpufreq.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/timex.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <asm/msr.h>
#include <asm/tsc.h>
#include <asm/timex.h>
#include <asm/io.h>
#include <asm/delay.h>
#define EPS_BRAND_C7M 0
#define EPS_BRAND_C7 1
......@@ -184,7 +184,7 @@ static int eps_cpu_init(struct cpufreq_policy *policy)
break;
}
switch(brand) {
switch (brand) {
case EPS_BRAND_C7M:
printk(KERN_CONT "C7-M\n");
break;
......@@ -218,17 +218,20 @@ static int eps_cpu_init(struct cpufreq_policy *policy)
/* Print voltage and multiplier */
rdmsr(MSR_IA32_PERF_STATUS, lo, hi);
current_voltage = lo & 0xff;
printk(KERN_INFO "eps: Current voltage = %dmV\n", current_voltage * 16 + 700);
printk(KERN_INFO "eps: Current voltage = %dmV\n",
current_voltage * 16 + 700);
current_multiplier = (lo >> 8) & 0xff;
printk(KERN_INFO "eps: Current multiplier = %d\n", current_multiplier);
/* Print limits */
max_voltage = hi & 0xff;
printk(KERN_INFO "eps: Highest voltage = %dmV\n", max_voltage * 16 + 700);
printk(KERN_INFO "eps: Highest voltage = %dmV\n",
max_voltage * 16 + 700);
max_multiplier = (hi >> 8) & 0xff;
printk(KERN_INFO "eps: Highest multiplier = %d\n", max_multiplier);
min_voltage = (hi >> 16) & 0xff;
printk(KERN_INFO "eps: Lowest voltage = %dmV\n", min_voltage * 16 + 700);
printk(KERN_INFO "eps: Lowest voltage = %dmV\n",
min_voltage * 16 + 700);
min_multiplier = (hi >> 24) & 0xff;
printk(KERN_INFO "eps: Lowest multiplier = %d\n", min_multiplier);
......@@ -318,7 +321,7 @@ static int eps_cpu_exit(struct cpufreq_policy *policy)
return 0;
}
static struct freq_attr* eps_attr[] = {
static struct freq_attr *eps_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
NULL,
};
......@@ -356,7 +359,7 @@ static void __exit eps_exit(void)
cpufreq_unregister_driver(&eps_driver);
}
MODULE_AUTHOR("Rafa Bilski <rafalbilski@interia.pl>");
MODULE_AUTHOR("Rafal Bilski <rafalbilski@interia.pl>");
MODULE_DESCRIPTION("Enhanced PowerSaver driver for VIA C7 CPU's.");
MODULE_LICENSE("GPL");
......
arch/x86/kernel/cpu/cpufreq/elanfreq.c
浏览文件 @ ada19a31
......@@ -184,7 +184,8 @@ static int elanfreq_target(struct cpufreq_policy *policy,
{
unsigned int newstate = 0;
if (cpufreq_frequency_table_target(policy, &elanfreq_table[0], target_freq, relation, &newstate))
if (cpufreq_frequency_table_target(policy, &elanfreq_table[0],
target_freq, relation, &newstate))
return -EINVAL;
elanfreq_set_cpu_state(newstate);
......@@ -301,7 +302,8 @@ static void __exit elanfreq_exit(void)
module_param(max_freq, int, 0444);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Robert Schwebel <r.schwebel@pengutronix.de>, Sven Geggus <sven@geggus.net>");
MODULE_AUTHOR("Robert Schwebel <r.schwebel@pengutronix.de>, "
"Sven Geggus <sven@geggus.net>");
MODULE_DESCRIPTION("cpufreq driver for AMD's Elan CPUs");
module_init(elanfreq_init);
......
arch/x86/kernel/cpu/cpufreq/gx-suspmod.c
浏览文件 @ ada19a31
......@@ -79,8 +79,9 @@
#include <linux/smp.h>
#include <linux/cpufreq.h>
#include <linux/pci.h>
#include <linux/errno.h>
#include <asm/processor-cyrix.h>
#include <asm/errno.h>
/* PCI config registers, all at F0 */
#define PCI_PMER1 0x80 /* power management enable register 1 */
......@@ -122,8 +123,8 @@ static struct gxfreq_params *gx_params;
static int stock_freq;
/* PCI bus clock - defaults to 30.000 if cpu_khz is not available */
static int pci_busclk = 0;
module_param (pci_busclk, int, 0444);
static int pci_busclk;
module_param(pci_busclk, int, 0444);
/* maximum duration for which the cpu may be suspended
* (32us * MAX_DURATION). If no parameter is given, this defaults
......@@ -132,7 +133,7 @@ module_param (pci_busclk, int, 0444);
* is suspended -- processing power is just 0.39% of what it used to be,
* though. 781.25 kHz(!) for a 200 MHz processor -- wow. */
static int max_duration = 255;
module_param (max_duration, int, 0444);
module_param(max_duration, int, 0444);
/* For the default policy, we want at least some processing power
* - let's say 5%. (min = maxfreq / POLICY_MIN_DIV)
......@@ -140,7 +141,8 @@ module_param (max_duration, int, 0444);
#define POLICY_MIN_DIV 20
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "gx-suspmod", msg)
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
"gx-suspmod", msg)
/**
* we can detect a core multipiler from dir0_lsb
......@@ -166,12 +168,20 @@ static int gx_freq_mult[16] = {
* Low Level chipset interface *
****************************************************************/
static struct pci_device_id gx_chipset_tbl[] __initdata = {
{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, PCI_ANY_ID, PCI_ANY_ID },
{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5520, PCI_ANY_ID, PCI_ANY_ID },
{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5510, PCI_ANY_ID, PCI_ANY_ID },
{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
PCI_ANY_ID, PCI_ANY_ID },
{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5520,
PCI_ANY_ID, PCI_ANY_ID },
{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5510,
PCI_ANY_ID, PCI_ANY_ID },
{ 0, },
};
static void gx_write_byte(int reg, int value)
{
pci_write_config_byte(gx_params->cs55x0, reg, value);
}
/**
* gx_detect_chipset:
*
......@@ -200,7 +210,8 @@ static __init struct pci_dev *gx_detect_chipset(void)
/**
* gx_get_cpuspeed:
*
* Finds out at which efficient frequency the Cyrix MediaGX/NatSemi Geode CPU runs.
* Finds out at which efficient frequency the Cyrix MediaGX/NatSemi
* Geode CPU runs.
*/
static unsigned int gx_get_cpuspeed(unsigned int cpu)
{
......@@ -217,17 +228,18 @@ static unsigned int gx_get_cpuspeed(unsigned int cpu)
*
**/
static unsigned int gx_validate_speed(unsigned int khz, u8 *on_duration, u8 *off_duration)
static unsigned int gx_validate_speed(unsigned int khz, u8 *on_duration,
u8 *off_duration)
{
unsigned int i;
u8 tmp_on, tmp_off;
int old_tmp_freq = stock_freq;
int tmp_freq;
*off_duration=1;
*on_duration=0;
*off_duration = 1;
*on_duration = 0;
for (i=max_duration; i>0; i--) {
for (i = max_duration; i > 0; i--) {
tmp_off = ((khz * i) / stock_freq) & 0xff;
tmp_on = i - tmp_off;
tmp_freq = (stock_freq * tmp_off) / i;
......@@ -259,26 +271,34 @@ static void gx_set_cpuspeed(unsigned int khz)
freqs.cpu = 0;
freqs.old = gx_get_cpuspeed(0);
new_khz = gx_validate_speed(khz, &gx_params->on_duration, &gx_params->off_duration);
new_khz = gx_validate_speed(khz, &gx_params->on_duration,
&gx_params->off_duration);
freqs.new = new_khz;
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
local_irq_save(flags);
if (new_khz != stock_freq) { /* if new khz == 100% of CPU speed, it is special case */
if (new_khz != stock_freq) {
/* if new khz == 100% of CPU speed, it is special case */
switch (gx_params->cs55x0->device) {
case PCI_DEVICE_ID_CYRIX_5530_LEGACY:
pmer1 = gx_params->pci_pmer1 | IRQ_SPDUP | VID_SPDUP;
/* FIXME: need to test other values -- Zwane,Miura */
pci_write_config_byte(gx_params->cs55x0, PCI_IRQTC, 4); /* typical 2 to 4ms */
pci_write_config_byte(gx_params->cs55x0, PCI_VIDTC, 100);/* typical 50 to 100ms */
pci_write_config_byte(gx_params->cs55x0, PCI_PMER1, pmer1);
if (gx_params->cs55x0->revision < 0x10) { /* CS5530(rev 1.2, 1.3) */
suscfg = gx_params->pci_suscfg | SUSMOD;
} else { /* CS5530A,B.. */
suscfg = gx_params->pci_suscfg | SUSMOD | PWRSVE;
/* typical 2 to 4ms */
gx_write_byte(PCI_IRQTC, 4);
/* typical 50 to 100ms */
gx_write_byte(PCI_VIDTC, 100);
gx_write_byte(PCI_PMER1, pmer1);
if (gx_params->cs55x0->revision < 0x10) {
/* CS5530(rev 1.2, 1.3) */
suscfg = gx_params->pci_suscfg|SUSMOD;
} else {
/* CS5530A,B.. */
suscfg = gx_params->pci_suscfg|SUSMOD|PWRSVE;
}
break;
case PCI_DEVICE_ID_CYRIX_5520:
......@@ -294,13 +314,13 @@ static void gx_set_cpuspeed(unsigned int khz)
suscfg = gx_params->pci_suscfg & ~(SUSMOD);
gx_params->off_duration = 0;
gx_params->on_duration = 0;
dprintk("suspend modulation disabled: cpu runs 100 percent speed.\n");
dprintk("suspend modulation disabled: cpu runs 100%% speed.\n");
}
pci_write_config_byte(gx_params->cs55x0, PCI_MODOFF, gx_params->off_duration);
pci_write_config_byte(gx_params->cs55x0, PCI_MODON, gx_params->on_duration);
gx_write_byte(PCI_MODOFF, gx_params->off_duration);
gx_write_byte(PCI_MODON, gx_params->on_duration);
pci_write_config_byte(gx_params->cs55x0, PCI_SUSCFG, suscfg);
gx_write_byte(PCI_SUSCFG, suscfg);
pci_read_config_byte(gx_params->cs55x0, PCI_SUSCFG, &suscfg);
local_irq_restore(flags);
......@@ -334,7 +354,8 @@ static int cpufreq_gx_verify(struct cpufreq_policy *policy)
return -EINVAL;
policy->cpu = 0;
cpufreq_verify_within_limits(policy, (stock_freq / max_duration), stock_freq);
cpufreq_verify_within_limits(policy, (stock_freq / max_duration),
stock_freq);
/* it needs to be assured that at least one supported frequency is
* within policy->min and policy->max. If it is not, policy->max
......@@ -354,7 +375,8 @@ static int cpufreq_gx_verify(struct cpufreq_policy *policy)
policy->max = tmp_freq;
if (policy->max < policy->min)
policy->max = policy->min;
cpufreq_verify_within_limits(policy, (stock_freq / max_duration), stock_freq);
cpufreq_verify_within_limits(policy, (stock_freq / max_duration),
stock_freq);
return 0;
}
......@@ -398,18 +420,18 @@ static int cpufreq_gx_cpu_init(struct cpufreq_policy *policy)
return -ENODEV;
/* determine maximum frequency */
if (pci_busclk) {
if (pci_busclk)
maxfreq = pci_busclk * gx_freq_mult[getCx86(CX86_DIR1) & 0x0f];
} else if (cpu_khz) {
else if (cpu_khz)
maxfreq = cpu_khz;
} else {
else
maxfreq = 30000 * gx_freq_mult[getCx86(CX86_DIR1) & 0x0f];
}
stock_freq = maxfreq;
curfreq = gx_get_cpuspeed(0);
dprintk("cpu max frequency is %d.\n", maxfreq);
dprintk("cpu current frequency is %dkHz.\n",curfreq);
dprintk("cpu current frequency is %dkHz.\n", curfreq);
/* setup basic struct for cpufreq API */
policy->cpu = 0;
......@@ -447,7 +469,8 @@ static int __init cpufreq_gx_init(void)
struct pci_dev *gx_pci;
/* Test if we have the right hardware */
if ((gx_pci = gx_detect_chipset()) == NULL)
gx_pci = gx_detect_chipset();
if (gx_pci == NULL)
return -ENODEV;
/* check whether module parameters are sane */
......@@ -468,9 +491,11 @@ static int __init cpufreq_gx_init(void)
pci_read_config_byte(params->cs55x0, PCI_PMER1, &(params->pci_pmer1));
pci_read_config_byte(params->cs55x0, PCI_PMER2, &(params->pci_pmer2));
pci_read_config_byte(params->cs55x0, PCI_MODON, &(params->on_duration));
pci_read_config_byte(params->cs55x0, PCI_MODOFF, &(params->off_duration));
pci_read_config_byte(params->cs55x0, PCI_MODOFF,
&(params->off_duration));
if ((ret = cpufreq_register_driver(&gx_suspmod_driver))) {
ret = cpufreq_register_driver(&gx_suspmod_driver);
if (ret) {
kfree(params);
return ret; /* register error! */
}
......@@ -485,9 +510,9 @@ static void __exit cpufreq_gx_exit(void)
kfree(gx_params);
}
MODULE_AUTHOR ("Hiroshi Miura <miura@da-cha.org>");
MODULE_DESCRIPTION ("Cpufreq driver for Cyrix MediaGX and NatSemi Geode");
MODULE_LICENSE ("GPL");
MODULE_AUTHOR("Hiroshi Miura <miura@da-cha.org>");
MODULE_DESCRIPTION("Cpufreq driver for Cyrix MediaGX and NatSemi Geode");
MODULE_LICENSE("GPL");
module_init(cpufreq_gx_init);
module_exit(cpufreq_gx_exit);
......
arch/x86/kernel/cpu/cpufreq/longhaul.c
浏览文件 @ ada19a31
......@@ -30,12 +30,12 @@
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/timex.h>
#include <linux/io.h>
#include <linux/acpi.h>
#include <linux/kernel.h>
#include <asm/msr.h>
#include <asm/timex.h>
#include <asm/io.h>
#include <asm/acpi.h>
#include <linux/acpi.h>
#include <acpi/processor.h>
#include "longhaul.h"
......@@ -58,7 +58,7 @@
#define USE_NORTHBRIDGE (1 << 2)
static int cpu_model;
static unsigned int numscales=16;
static unsigned int numscales = 16;
static unsigned int fsb;
static const struct mV_pos *vrm_mV_table;
......@@ -67,8 +67,8 @@ static const unsigned char *mV_vrm_table;
static unsigned int highest_speed, lowest_speed; /* kHz */
static unsigned int minmult, maxmult;
static int can_scale_voltage;
static struct acpi_processor *pr = NULL;
static struct acpi_processor_cx *cx = NULL;
static struct acpi_processor *pr;
static struct acpi_processor_cx *cx;
static u32 acpi_regs_addr;
static u8 longhaul_flags;
static unsigned int longhaul_index;
......@@ -78,12 +78,13 @@ static int scale_voltage;
static int disable_acpi_c3;
static int revid_errata;
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "longhaul", msg)
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
"longhaul", msg)
/* Clock ratios multiplied by 10 */
static int clock_ratio[32];
static int eblcr_table[32];
static int mults[32];
static int eblcr[32];
static int longhaul_version;
static struct cpufreq_frequency_table *longhaul_table;
......@@ -93,7 +94,7 @@ static char speedbuffer[8];
static char *print_speed(int speed)
{
if (speed < 1000) {
snprintf(speedbuffer, sizeof(speedbuffer),"%dMHz", speed);
snprintf(speedbuffer, sizeof(speedbuffer), "%dMHz", speed);
return speedbuffer;
}
......@@ -122,27 +123,28 @@ static unsigned int calc_speed(int mult)
static int longhaul_get_cpu_mult(void)
{
unsigned long invalue=0,lo, hi;
unsigned long invalue = 0, lo, hi;
rdmsr (MSR_IA32_EBL_CR_POWERON, lo, hi);
invalue = (lo & (1<<22|1<<23|1<<24|1<<25)) >>22;
if (longhaul_version==TYPE_LONGHAUL_V2 || longhaul_version==TYPE_POWERSAVER) {
rdmsr(MSR_IA32_EBL_CR_POWERON, lo, hi);
invalue = (lo & (1<<22|1<<23|1<<24|1<<25))>>22;
if (longhaul_version == TYPE_LONGHAUL_V2 ||
longhaul_version == TYPE_POWERSAVER) {
if (lo & (1<<27))
invalue+=16;
invalue += 16;
}
return eblcr_table[invalue];
return eblcr[invalue];
}
/* For processor with BCR2 MSR */
static void do_longhaul1(unsigned int clock_ratio_index)
static void do_longhaul1(unsigned int mults_index)
{
union msr_bcr2 bcr2;
rdmsrl(MSR_VIA_BCR2, bcr2.val);
/* Enable software clock multiplier */
bcr2.bits.ESOFTBF = 1;
bcr2.bits.CLOCKMUL = clock_ratio_index & 0xff;
bcr2.bits.CLOCKMUL = mults_index & 0xff;
/* Sync to timer tick */
safe_halt();
......@@ -161,7 +163,7 @@ static void do_longhaul1(unsigned int clock_ratio_index)
/* For processor with Longhaul MSR */
static void do_powersaver(int cx_address, unsigned int clock_ratio_index,
static void do_powersaver(int cx_address, unsigned int mults_index,
unsigned int dir)
{
union msr_longhaul longhaul;
......@@ -173,11 +175,11 @@ static void do_powersaver(int cx_address, unsigned int clock_ratio_index,
longhaul.bits.RevisionKey = longhaul.bits.RevisionID;
else
longhaul.bits.RevisionKey = 0;
longhaul.bits.SoftBusRatio = clock_ratio_index & 0xf;
longhaul.bits.SoftBusRatio4 = (clock_ratio_index & 0x10) >> 4;
longhaul.bits.SoftBusRatio = mults_index & 0xf;
longhaul.bits.SoftBusRatio4 = (mults_index & 0x10) >> 4;
/* Setup new voltage */
if (can_scale_voltage)
longhaul.bits.SoftVID = (clock_ratio_index >> 8) & 0x1f;
longhaul.bits.SoftVID = (mults_index >> 8) & 0x1f;
/* Sync to timer tick */
safe_halt();
/* Raise voltage if necessary */
......@@ -240,14 +242,14 @@ static void do_powersaver(int cx_address, unsigned int clock_ratio_index,
/**
* longhaul_set_cpu_frequency()
* @clock_ratio_index : bitpattern of the new multiplier.
* @mults_index : bitpattern of the new multiplier.
*
* Sets a new clock ratio.
*/
static void longhaul_setstate(unsigned int table_index)
{
unsigned int clock_ratio_index;
unsigned int mults_index;
int speed, mult;
struct cpufreq_freqs freqs;
unsigned long flags;
......@@ -256,9 +258,9 @@ static void longhaul_setstate(unsigned int table_index)
u32 bm_timeout = 1000;
unsigned int dir = 0;
clock_ratio_index = longhaul_table[table_index].index;
mults_index = longhaul_table[table_index].index;
/* Safety precautions */
mult = clock_ratio[clock_ratio_index & 0x1f];
mult = mults[mults_index & 0x1f];
if (mult == -1)
return;
speed = calc_speed(mult);
......@@ -274,7 +276,7 @@ static void longhaul_setstate(unsigned int table_index)
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
dprintk ("Setting to FSB:%dMHz Mult:%d.%dx (%s)\n",
dprintk("Setting to FSB:%dMHz Mult:%d.%dx (%s)\n",
fsb, mult/10, mult%10, print_speed(speed/1000));
retry_loop:
preempt_disable();
......@@ -282,8 +284,8 @@ static void longhaul_setstate(unsigned int table_index)
pic2_mask = inb(0xA1);
pic1_mask = inb(0x21); /* works on C3. save mask. */
outb(0xFF,0xA1); /* Overkill */
outb(0xFE,0x21); /* TMR0 only */
outb(0xFF, 0xA1); /* Overkill */
outb(0xFE, 0x21); /* TMR0 only */
/* Wait while PCI bus is busy. */
if (acpi_regs_addr && (longhaul_flags & USE_NORTHBRIDGE
......@@ -312,7 +314,7 @@ static void longhaul_setstate(unsigned int table_index)
* Software controlled multipliers only.
*/
case TYPE_LONGHAUL_V1:
do_longhaul1(clock_ratio_index);
do_longhaul1(mults_index);
break;
/*
......@@ -327,9 +329,9 @@ static void longhaul_setstate(unsigned int table_index)
if (longhaul_flags & USE_ACPI_C3) {
/* Don't allow wakeup */
acpi_set_register(ACPI_BITREG_BUS_MASTER_RLD, 0);
do_powersaver(cx->address, clock_ratio_index, dir);
do_powersaver(cx->address, mults_index, dir);
} else {
do_powersaver(0, clock_ratio_index, dir);
do_powersaver(0, mults_index, dir);
}
break;
}
......@@ -341,8 +343,8 @@ static void longhaul_setstate(unsigned int table_index)
/* Enable bus master arbitration */
acpi_set_register(ACPI_BITREG_ARB_DISABLE, 0);
}
outb(pic2_mask,0xA1); /* restore mask */
outb(pic1_mask,0x21);
outb(pic2_mask, 0xA1); /* restore mask */
outb(pic1_mask, 0x21);
local_irq_restore(flags);
preempt_enable();
......@@ -392,7 +394,8 @@ static void longhaul_setstate(unsigned int table_index)
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
if (!bm_timeout)
printk(KERN_INFO PFX "Warning: Timeout while waiting for idle PCI bus.\n");
printk(KERN_INFO PFX "Warning: Timeout while waiting for "
"idle PCI bus.\n");
}
/*
......@@ -458,31 +461,32 @@ static int __init longhaul_get_ranges(void)
break;
}
dprintk ("MinMult:%d.%dx MaxMult:%d.%dx\n",
dprintk("MinMult:%d.%dx MaxMult:%d.%dx\n",
minmult/10, minmult%10, maxmult/10, maxmult%10);
highest_speed = calc_speed(maxmult);
lowest_speed = calc_speed(minmult);
dprintk ("FSB:%dMHz Lowest speed: %s Highest speed:%s\n", fsb,
dprintk("FSB:%dMHz Lowest speed: %s Highest speed:%s\n", fsb,
print_speed(lowest_speed/1000),
print_speed(highest_speed/1000));
if (lowest_speed == highest_speed) {
printk (KERN_INFO PFX "highestspeed == lowest, aborting.\n");
printk(KERN_INFO PFX "highestspeed == lowest, aborting.\n");
return -EINVAL;
}
if (lowest_speed > highest_speed) {
printk (KERN_INFO PFX "nonsense! lowest (%d > %d) !\n",
printk(KERN_INFO PFX "nonsense! lowest (%d > %d) !\n",
lowest_speed, highest_speed);
return -EINVAL;
}
longhaul_table = kmalloc((numscales + 1) * sizeof(struct cpufreq_frequency_table), GFP_KERNEL);
if(!longhaul_table)
longhaul_table = kmalloc((numscales + 1) * sizeof(*longhaul_table),
GFP_KERNEL);
if (!longhaul_table)
return -ENOMEM;
for (j = 0; j < numscales; j++) {
ratio = clock_ratio[j];
ratio = mults[j];
if (ratio == -1)
continue;
if (ratio > maxmult || ratio < minmult)
......@@ -507,13 +511,10 @@ static int __init longhaul_get_ranges(void)
}
}
if (min_i != j) {
unsigned int temp;
temp = longhaul_table[j].frequency;
longhaul_table[j].frequency = longhaul_table[min_i].frequency;
longhaul_table[min_i].frequency = temp;
temp = longhaul_table[j].index;
longhaul_table[j].index = longhaul_table[min_i].index;
longhaul_table[min_i].index = temp;
swap(longhaul_table[j].frequency,
longhaul_table[min_i].frequency);
swap(longhaul_table[j].index,
longhaul_table[min_i].index);
}
}
......@@ -521,7 +522,7 @@ static int __init longhaul_get_ranges(void)
/* Find index we are running on */
for (j = 0; j < k; j++) {
if (clock_ratio[longhaul_table[j].index & 0x1f] == mult) {
if (mults[longhaul_table[j].index & 0x1f] == mult) {
longhaul_index = j;
break;
}
......@@ -559,20 +560,22 @@ static void __init longhaul_setup_voltagescaling(void)
maxvid = vrm_mV_table[longhaul.bits.MaximumVID];
if (minvid.mV == 0 || maxvid.mV == 0 || minvid.mV > maxvid.mV) {
printk (KERN_INFO PFX "Bogus values Min:%d.%03d Max:%d.%03d. "
printk(KERN_INFO PFX "Bogus values Min:%d.%03d Max:%d.%03d. "
"Voltage scaling disabled.\n",
minvid.mV/1000, minvid.mV%1000, maxvid.mV/1000, maxvid.mV%1000);
minvid.mV/1000, minvid.mV%1000,
maxvid.mV/1000, maxvid.mV%1000);
return;
}
if (minvid.mV == maxvid.mV) {
printk (KERN_INFO PFX "Claims to support voltage scaling but min & max are "
"both %d.%03d. Voltage scaling disabled\n",
printk(KERN_INFO PFX "Claims to support voltage scaling but "
"min & max are both %d.%03d. "
"Voltage scaling disabled\n",
maxvid.mV/1000, maxvid.mV%1000);
return;
}
/* How many voltage steps */
/* How many voltage steps*/
numvscales = maxvid.pos - minvid.pos + 1;
printk(KERN_INFO PFX
"Max VID=%d.%03d "
......@@ -586,7 +589,7 @@ static void __init longhaul_setup_voltagescaling(void)
j = longhaul.bits.MinMHzBR;
if (longhaul.bits.MinMHzBR4)
j += 16;
min_vid_speed = eblcr_table[j];
min_vid_speed = eblcr[j];
if (min_vid_speed == -1)
return;
switch (longhaul.bits.MinMHzFSB) {
......@@ -617,7 +620,8 @@ static void __init longhaul_setup_voltagescaling(void)
pos = minvid.pos;
longhaul_table[j].index |= mV_vrm_table[pos] << 8;
vid = vrm_mV_table[mV_vrm_table[pos]];
printk(KERN_INFO PFX "f: %d kHz, index: %d, vid: %d mV\n", speed, j, vid.mV);
printk(KERN_INFO PFX "f: %d kHz, index: %d, vid: %d mV\n",
speed, j, vid.mV);
j++;
}
......@@ -640,7 +644,8 @@ static int longhaul_target(struct cpufreq_policy *policy,
unsigned int dir = 0;
u8 vid, current_vid;
if (cpufreq_frequency_table_target(policy, longhaul_table, target_freq, relation, &table_index))
if (cpufreq_frequency_table_target(policy, longhaul_table, target_freq,
relation, &table_index))
return -EINVAL;
/* Don't set same frequency again */
......@@ -656,7 +661,8 @@ static int longhaul_target(struct cpufreq_policy *policy,
* this in hardware, C3 is old and we need to do this
* in software. */
i = longhaul_index;
current_vid = (longhaul_table[longhaul_index].index >> 8) & 0x1f;
current_vid = (longhaul_table[longhaul_index].index >> 8);
current_vid &= 0x1f;
if (table_index > longhaul_index)
dir = 1;
while (i != table_index) {
......@@ -691,9 +697,9 @@ static acpi_status longhaul_walk_callback(acpi_handle obj_handle,
{
struct acpi_device *d;
if ( acpi_bus_get_device(obj_handle, &d) ) {
if (acpi_bus_get_device(obj_handle, &d))
return 0;
}
*return_value = acpi_driver_data(d);
return 1;
}
......@@ -750,7 +756,7 @@ static int longhaul_setup_southbridge(void)
/* Find VT8235 southbridge */
dev = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235, NULL);
if (dev == NULL)
/* Find VT8237 southbridge */
/* Find VT8237 southbridge */
dev = pci_get_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_8237, NULL);
if (dev != NULL) {
......@@ -769,7 +775,8 @@ static int longhaul_setup_southbridge(void)
if (pci_cmd & 1 << 7) {
pci_read_config_dword(dev, 0x88, &acpi_regs_addr);
acpi_regs_addr &= 0xff00;
printk(KERN_INFO PFX "ACPI I/O at 0x%x\n", acpi_regs_addr);
printk(KERN_INFO PFX "ACPI I/O at 0x%x\n",
acpi_regs_addr);
}
pci_dev_put(dev);
......@@ -781,7 +788,7 @@ static int longhaul_setup_southbridge(void)
static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
{
struct cpuinfo_x86 *c = &cpu_data(0);
char *cpuname=NULL;
char *cpuname = NULL;
int ret;
u32 lo, hi;
......@@ -791,8 +798,8 @@ static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
cpu_model = CPU_SAMUEL;
cpuname = "C3 'Samuel' [C5A]";
longhaul_version = TYPE_LONGHAUL_V1;
memcpy (clock_ratio, samuel1_clock_ratio, sizeof(samuel1_clock_ratio));
memcpy (eblcr_table, samuel1_eblcr, sizeof(samuel1_eblcr));
memcpy(mults, samuel1_mults, sizeof(samuel1_mults));
memcpy(eblcr, samuel1_eblcr, sizeof(samuel1_eblcr));
break;
case 7:
......@@ -803,10 +810,8 @@ static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
cpuname = "C3 'Samuel 2' [C5B]";
/* Note, this is not a typo, early Samuel2's had
* Samuel1 ratios. */
memcpy(clock_ratio, samuel1_clock_ratio,
sizeof(samuel1_clock_ratio));
memcpy(eblcr_table, samuel2_eblcr,
sizeof(samuel2_eblcr));
memcpy(mults, samuel1_mults, sizeof(samuel1_mults));
memcpy(eblcr, samuel2_eblcr, sizeof(samuel2_eblcr));
break;
case 1 ... 15:
longhaul_version = TYPE_LONGHAUL_V1;
......@@ -817,10 +822,8 @@ static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
cpu_model = CPU_EZRA;
cpuname = "C3 'Ezra' [C5C]";
}
memcpy(clock_ratio, ezra_clock_ratio,
sizeof(ezra_clock_ratio));
memcpy(eblcr_table, ezra_eblcr,
sizeof(ezra_eblcr));
memcpy(mults, ezra_mults, sizeof(ezra_mults));
memcpy(eblcr, ezra_eblcr, sizeof(ezra_eblcr));
break;
}
break;
......@@ -829,18 +832,16 @@ static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
cpu_model = CPU_EZRA_T;
cpuname = "C3 'Ezra-T' [C5M]";
longhaul_version = TYPE_POWERSAVER;
numscales=32;
memcpy (clock_ratio, ezrat_clock_ratio, sizeof(ezrat_clock_ratio));
memcpy (eblcr_table, ezrat_eblcr, sizeof(ezrat_eblcr));
numscales = 32;
memcpy(mults, ezrat_mults, sizeof(ezrat_mults));
memcpy(eblcr, ezrat_eblcr, sizeof(ezrat_eblcr));
break;
case 9:
longhaul_version = TYPE_POWERSAVER;
numscales = 32;
memcpy(clock_ratio,
nehemiah_clock_ratio,
sizeof(nehemiah_clock_ratio));
memcpy(eblcr_table, nehemiah_eblcr, sizeof(nehemiah_eblcr));
memcpy(mults, nehemiah_mults, sizeof(nehemiah_mults));
memcpy(eblcr, nehemiah_eblcr, sizeof(nehemiah_eblcr));
switch (c->x86_mask) {
case 0 ... 1:
cpu_model = CPU_NEHEMIAH;
......@@ -869,14 +870,14 @@ static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
longhaul_version = TYPE_LONGHAUL_V1;
}
printk (KERN_INFO PFX "VIA %s CPU detected. ", cpuname);
printk(KERN_INFO PFX "VIA %s CPU detected. ", cpuname);
switch (longhaul_version) {
case TYPE_LONGHAUL_V1:
case TYPE_LONGHAUL_V2:
printk ("Longhaul v%d supported.\n", longhaul_version);
printk(KERN_CONT "Longhaul v%d supported.\n", longhaul_version);
break;
case TYPE_POWERSAVER:
printk ("Powersaver supported.\n");
printk(KERN_CONT "Powersaver supported.\n");
break;
};
......@@ -940,7 +941,7 @@ static int __devexit longhaul_cpu_exit(struct cpufreq_policy *policy)
return 0;
}
static struct freq_attr* longhaul_attr[] = {
static struct freq_attr *longhaul_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
NULL,
};
......@@ -966,13 +967,15 @@ static int __init longhaul_init(void)
#ifdef CONFIG_SMP
if (num_online_cpus() > 1) {
printk(KERN_ERR PFX "More than 1 CPU detected, longhaul disabled.\n");
printk(KERN_ERR PFX "More than 1 CPU detected, "
"longhaul disabled.\n");
return -ENODEV;
}
#endif
#ifdef CONFIG_X86_IO_APIC
if (cpu_has_apic) {
printk(KERN_ERR PFX "APIC detected. Longhaul is currently broken in this configuration.\n");
printk(KERN_ERR PFX "APIC detected. Longhaul is currently "
"broken in this configuration.\n");
return -ENODEV;
}
#endif
......@@ -993,8 +996,8 @@ static void __exit longhaul_exit(void)
{
int i;
for (i=0; i < numscales; i++) {
if (clock_ratio[i] == maxmult) {
for (i = 0; i < numscales; i++) {
if (mults[i] == maxmult) {
longhaul_setstate(i);
break;
}
......@@ -1007,11 +1010,11 @@ static void __exit longhaul_exit(void)
/* Even if BIOS is exporting ACPI C3 state, and it is used
* with success when CPU is idle, this state doesn't
* trigger frequency transition in some cases. */
module_param (disable_acpi_c3, int, 0644);
module_param(disable_acpi_c3, int, 0644);
MODULE_PARM_DESC(disable_acpi_c3, "Don't use ACPI C3 support");
/* Change CPU voltage with frequency. Very usefull to save
* power, but most VIA C3 processors aren't supporting it. */
module_param (scale_voltage, int, 0644);
module_param(scale_voltage, int, 0644);
MODULE_PARM_DESC(scale_voltage, "Scale voltage of processor");
/* Force revision key to 0 for processors which doesn't
* support voltage scaling, but are introducing itself as
......@@ -1019,9 +1022,9 @@ MODULE_PARM_DESC(scale_voltage, "Scale voltage of processor");
module_param(revid_errata, int, 0644);
MODULE_PARM_DESC(revid_errata, "Ignore CPU Revision ID");
MODULE_AUTHOR ("Dave Jones <davej@redhat.com>");
MODULE_DESCRIPTION ("Longhaul driver for VIA Cyrix processors.");
MODULE_LICENSE ("GPL");
MODULE_AUTHOR("Dave Jones <davej@redhat.com>");
MODULE_DESCRIPTION("Longhaul driver for VIA Cyrix processors.");
MODULE_LICENSE("GPL");
late_initcall(longhaul_init);
module_exit(longhaul_exit);
arch/x86/kernel/cpu/cpufreq/longhaul.h
浏览文件 @ ada19a31
......@@ -49,14 +49,14 @@ union msr_longhaul {
/*
* Clock ratio tables. Div/Mod by 10 to get ratio.
* The eblcr ones specify the ratio read from the CPU.
* The clock_ratio ones specify what to write to the CPU.
* The eblcr values specify the ratio read from the CPU.
* The mults values specify what to write to the CPU.
*/
/*
* VIA C3 Samuel 1 & Samuel 2 (stepping 0)
*/
static const int __initdata samuel1_clock_ratio[16] = {
static const int __initdata samuel1_mults[16] = {
-1, /* 0000 -> RESERVED */
30, /* 0001 -> 3.0x */
40, /* 0010 -> 4.0x */
......@@ -119,7 +119,7 @@ static const int __initdata samuel2_eblcr[16] = {
/*
* VIA C3 Ezra
*/
static const int __initdata ezra_clock_ratio[16] = {
static const int __initdata ezra_mults[16] = {
100, /* 0000 -> 10.0x */
30, /* 0001 -> 3.0x */
40, /* 0010 -> 4.0x */
......@@ -160,7 +160,7 @@ static const int __initdata ezra_eblcr[16] = {
/*
* VIA C3 (Ezra-T) [C5M].
*/
static const int __initdata ezrat_clock_ratio[32] = {
static const int __initdata ezrat_mults[32] = {
100, /* 0000 -> 10.0x */
30, /* 0001 -> 3.0x */
40, /* 0010 -> 4.0x */
......@@ -235,7 +235,7 @@ static const int __initdata ezrat_eblcr[32] = {
/*
* VIA C3 Nehemiah */
static const int __initdata nehemiah_clock_ratio[32] = {
static const int __initdata nehemiah_mults[32] = {
100, /* 0000 -> 10.0x */
-1, /* 0001 -> 16.0x */
40, /* 0010 -> 4.0x */
......
arch/x86/kernel/cpu/cpufreq/longrun.c
浏览文件 @ ada19a31
......@@ -11,12 +11,13 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/cpufreq.h>
#include <linux/timex.h>
#include <asm/msr.h>
#include <asm/processor.h>
#include <asm/timex.h>
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "longrun", msg)
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
"longrun", msg)
static struct cpufreq_driver longrun_driver;
......@@ -51,7 +52,7 @@ static void __init longrun_get_policy(struct cpufreq_policy *policy)
msr_lo &= 0x0000007F;
msr_hi &= 0x0000007F;
if ( longrun_high_freq <= longrun_low_freq ) {
if (longrun_high_freq <= longrun_low_freq) {
/* Assume degenerate Longrun table */
policy->min = policy->max = longrun_high_freq;
} else {
......@@ -79,7 +80,7 @@ static int longrun_set_policy(struct cpufreq_policy *policy)
if (!policy)
return -EINVAL;
if ( longrun_high_freq <= longrun_low_freq ) {
if (longrun_high_freq <= longrun_low_freq) {
/* Assume degenerate Longrun table */
pctg_lo = pctg_hi = 100;
} else {
......@@ -152,7 +153,7 @@ static unsigned int longrun_get(unsigned int cpu)
cpuid(0x80860007, &eax, &ebx, &ecx, &edx);
dprintk("cpuid eax is %u\n", eax);
return (eax * 1000);
return eax * 1000;
}
/**
......@@ -196,7 +197,8 @@ static unsigned int __init longrun_determine_freqs(unsigned int *low_freq,
rdmsr(MSR_TMTA_LRTI_VOLT_MHZ, msr_lo, msr_hi);
*high_freq = msr_lo * 1000; /* to kHz */
dprintk("longrun table interface told %u - %u kHz\n", *low_freq, *high_freq);
dprintk("longrun table interface told %u - %u kHz\n",
*low_freq, *high_freq);
if (*low_freq > *high_freq)
*low_freq = *high_freq;
......@@ -219,7 +221,7 @@ static unsigned int __init longrun_determine_freqs(unsigned int *low_freq,
cpuid(0x80860007, &eax, &ebx, &ecx, &edx);
/* try decreasing in 10% steps, some processors react only
* on some barrier values */
for (try_hi = 80; try_hi > 0 && ecx > 90; try_hi -=10) {
for (try_hi = 80; try_hi > 0 && ecx > 90; try_hi -= 10) {
/* set to 0 to try_hi perf_pctg */
msr_lo &= 0xFFFFFF80;
msr_hi &= 0xFFFFFF80;
......@@ -236,7 +238,7 @@ static unsigned int __init longrun_determine_freqs(unsigned int *low_freq,
/* performance_pctg = (current_freq - low_freq)/(high_freq - low_freq)
* eqals
* low_freq * ( 1 - perf_pctg) = (cur_freq - high_freq * perf_pctg)
* low_freq * (1 - perf_pctg) = (cur_freq - high_freq * perf_pctg)
*
* high_freq * perf_pctg is stored tempoarily into "ebx".
*/
......@@ -317,9 +319,10 @@ static void __exit longrun_exit(void)
}
MODULE_AUTHOR ("Dominik Brodowski <linux@brodo.de>");
MODULE_DESCRIPTION ("LongRun driver for Transmeta Crusoe and Efficeon processors.");
MODULE_LICENSE ("GPL");
MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
MODULE_DESCRIPTION("LongRun driver for Transmeta Crusoe and "
"Efficeon processors.");
MODULE_LICENSE("GPL");
module_init(longrun_init);
module_exit(longrun_exit);
arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
浏览文件 @ ada19a31
......@@ -27,15 +27,17 @@
#include <linux/cpufreq.h>
#include <linux/slab.h>
#include <linux/cpumask.h>
#include <linux/timex.h>
#include <asm/processor.h>
#include <asm/msr.h>
#include <asm/timex.h>
#include <asm/timer.h>
#include "speedstep-lib.h"
#define PFX "p4-clockmod: "
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "p4-clockmod", msg)
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
"p4-clockmod", msg)
/*
* Duty Cycle (3bits), note DC_DISABLE is not specified in
......@@ -58,7 +60,8 @@ static int cpufreq_p4_setdc(unsigned int cpu, unsigned int newstate)
{
u32 l, h;
if (!cpu_online(cpu) || (newstate > DC_DISABLE) || (newstate == DC_RESV))
if (!cpu_online(cpu) ||
(newstate > DC_DISABLE) || (newstate == DC_RESV))
return -EINVAL;
rdmsr_on_cpu(cpu, MSR_IA32_THERM_STATUS, &l, &h);
......@@ -66,7 +69,8 @@ static int cpufreq_p4_setdc(unsigned int cpu, unsigned int newstate)
if (l & 0x01)
dprintk("CPU#%d currently thermal throttled\n", cpu);
if (has_N44_O17_errata[cpu] && (newstate == DC_25PT || newstate == DC_DFLT))
if (has_N44_O17_errata[cpu] &&
(newstate == DC_25PT || newstate == DC_DFLT))
newstate = DC_38PT;
rdmsr_on_cpu(cpu, MSR_IA32_THERM_CONTROL, &l, &h);
......@@ -112,7 +116,8 @@ static int cpufreq_p4_target(struct cpufreq_policy *policy,
struct cpufreq_freqs freqs;
int i;
if (cpufreq_frequency_table_target(policy, &p4clockmod_table[0], target_freq, relation, &newstate))
if (cpufreq_frequency_table_target(policy, &p4clockmod_table[0],
target_freq, relation, &newstate))
return -EINVAL;
freqs.old = cpufreq_p4_get(policy->cpu);
......@@ -127,7 +132,8 @@ static int cpufreq_p4_target(struct cpufreq_policy *policy,
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
}
/* run on each logical CPU, see section 13.15.3 of IA32 Intel Architecture Software
/* run on each logical CPU,
* see section 13.15.3 of IA32 Intel Architecture Software
* Developer's Manual, Volume 3
*/
for_each_cpu(i, policy->cpus)
......@@ -153,28 +159,30 @@ static unsigned int cpufreq_p4_get_frequency(struct cpuinfo_x86 *c)
{
if (c->x86 == 0x06) {
if (cpu_has(c, X86_FEATURE_EST))
printk(KERN_WARNING PFX "Warning: EST-capable CPU detected. "
"The acpi-cpufreq module offers voltage scaling"
" in addition of frequency scaling. You should use "
"that instead of p4-clockmod, if possible.\n");
printk(KERN_WARNING PFX "Warning: EST-capable CPU "
"detected. The acpi-cpufreq module offers "
"voltage scaling in addition of frequency "
"scaling. You should use that instead of "
"p4-clockmod, if possible.\n");
switch (c->x86_model) {
case 0x0E: /* Core */
case 0x0F: /* Core Duo */
case 0x16: /* Celeron Core */
p4clockmod_driver.flags |= CPUFREQ_CONST_LOOPS;
return speedstep_get_processor_frequency(SPEEDSTEP_PROCESSOR_PCORE);
return speedstep_get_frequency(SPEEDSTEP_CPU_PCORE);
case 0x0D: /* Pentium M (Dothan) */
p4clockmod_driver.flags |= CPUFREQ_CONST_LOOPS;
/* fall through */
case 0x09: /* Pentium M (Banias) */
return speedstep_get_processor_frequency(SPEEDSTEP_PROCESSOR_PM);
return speedstep_get_frequency(SPEEDSTEP_CPU_PM);
}
}
if (c->x86 != 0xF) {
if (!cpu_has(c, X86_FEATURE_EST))
printk(KERN_WARNING PFX "Unknown p4-clockmod-capable CPU. "
"Please send an e-mail to <cpufreq@vger.kernel.org>\n");
printk(KERN_WARNING PFX "Unknown CPU. "
"Please send an e-mail to "
"<cpufreq@vger.kernel.org>\n");
return 0;
}
......@@ -182,16 +190,16 @@ static unsigned int cpufreq_p4_get_frequency(struct cpuinfo_x86 *c)
* throttling is active or not. */
p4clockmod_driver.flags |= CPUFREQ_CONST_LOOPS;
if (speedstep_detect_processor() == SPEEDSTEP_PROCESSOR_P4M) {
if (speedstep_detect_processor() == SPEEDSTEP_CPU_P4M) {
printk(KERN_WARNING PFX "Warning: Pentium 4-M detected. "
"The speedstep-ich or acpi cpufreq modules offer "
"voltage scaling in addition of frequency scaling. "
"You should use either one instead of p4-clockmod, "
"if possible.\n");
return speedstep_get_processor_frequency(SPEEDSTEP_PROCESSOR_P4M);
return speedstep_get_frequency(SPEEDSTEP_CPU_P4M);
}
return speedstep_get_processor_frequency(SPEEDSTEP_PROCESSOR_P4D);
return speedstep_get_frequency(SPEEDSTEP_CPU_P4D);
}
......@@ -217,14 +225,20 @@ static int cpufreq_p4_cpu_init(struct cpufreq_policy *policy)
dprintk("has errata -- disabling low frequencies\n");
}
if (speedstep_detect_processor() == SPEEDSTEP_CPU_P4D &&
c->x86_model < 2) {
/* switch to maximum frequency and measure result */
cpufreq_p4_setdc(policy->cpu, DC_DISABLE);
recalibrate_cpu_khz();
}
/* get max frequency */
stock_freq = cpufreq_p4_get_frequency(c);
if (!stock_freq)
return -EINVAL;
/* table init */
for (i=1; (p4clockmod_table[i].frequency != CPUFREQ_TABLE_END); i++) {
if ((i<2) && (has_N44_O17_errata[policy->cpu]))
for (i = 1; (p4clockmod_table[i].frequency != CPUFREQ_TABLE_END); i++) {
if ((i < 2) && (has_N44_O17_errata[policy->cpu]))
p4clockmod_table[i].frequency = CPUFREQ_ENTRY_INVALID;
else
p4clockmod_table[i].frequency = (stock_freq * i)/8;
......@@ -232,7 +246,10 @@ static int cpufreq_p4_cpu_init(struct cpufreq_policy *policy)
cpufreq_frequency_table_get_attr(p4clockmod_table, policy->cpu);
/* cpuinfo and default policy values */
policy->cpuinfo.transition_latency = 1000000; /* assumed */
/* the transition latency is set to be 1 higher than the maximum
* transition latency of the ondemand governor */
policy->cpuinfo.transition_latency = 10000001;
policy->cur = stock_freq;
return cpufreq_frequency_table_cpuinfo(policy, &p4clockmod_table[0]);
......@@ -258,12 +275,12 @@ static unsigned int cpufreq_p4_get(unsigned int cpu)
l = DC_DISABLE;
if (l != DC_DISABLE)
return (stock_freq * l / 8);
return stock_freq * l / 8;
return stock_freq;
}
static struct freq_attr* p4clockmod_attr[] = {
static struct freq_attr *p4clockmod_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
NULL,
};
......@@ -298,9 +315,10 @@ static int __init cpufreq_p4_init(void)
ret = cpufreq_register_driver(&p4clockmod_driver);
if (!ret)
printk(KERN_INFO PFX "P4/Xeon(TM) CPU On-Demand Clock Modulation available\n");
printk(KERN_INFO PFX "P4/Xeon(TM) CPU On-Demand Clock "
"Modulation available\n");
return (ret);
return ret;
}
......@@ -310,9 +328,9 @@ static void __exit cpufreq_p4_exit(void)
}
MODULE_AUTHOR ("Zwane Mwaikambo <zwane@commfireservices.com>");
MODULE_DESCRIPTION ("cpufreq driver for Pentium(TM) 4/Xeon(TM)");
MODULE_LICENSE ("GPL");
MODULE_AUTHOR("Zwane Mwaikambo <zwane@commfireservices.com>");
MODULE_DESCRIPTION("cpufreq driver for Pentium(TM) 4/Xeon(TM)");
MODULE_LICENSE("GPL");
late_initcall(cpufreq_p4_init);
module_exit(cpufreq_p4_exit);
arch/x86/kernel/cpu/cpufreq/powernow-k6.c
浏览文件 @ ada19a31
/*
* This file was based upon code in Powertweak Linux (http://powertweak.sf.net)
* (C) 2000-2003 Dave Jones, Arjan van de Ven, Janne Pänkälä, Dominik Brodowski.
* (C) 2000-2003 Dave Jones, Arjan van de Ven, Janne Pänkälä,
* Dominik Brodowski.
*
* Licensed under the terms of the GNU GPL License version 2.
*
......@@ -13,14 +14,15 @@
#include <linux/cpufreq.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <asm/msr.h>
#include <linux/timex.h>
#include <linux/io.h>
#include <asm/msr.h>
#define POWERNOW_IOPORT 0xfff0 /* it doesn't matter where, as long
as it is unused */
#define PFX "powernow-k6: "
static unsigned int busfreq; /* FSB, in 10 kHz */
static unsigned int max_multiplier;
......@@ -47,8 +49,8 @@ static struct cpufreq_frequency_table clock_ratio[] = {
*/
static int powernow_k6_get_cpu_multiplier(void)
{
u64 invalue = 0;
u32 msrval;
u64 invalue = 0;
u32 msrval;
msrval = POWERNOW_IOPORT + 0x1;
wrmsr(MSR_K6_EPMR, msrval, 0); /* enable the PowerNow port */
......@@ -68,12 +70,12 @@ static int powernow_k6_get_cpu_multiplier(void)
*/
static void powernow_k6_set_state(unsigned int best_i)
{
unsigned long outvalue = 0, invalue = 0;
unsigned long msrval;
struct cpufreq_freqs freqs;
unsigned long outvalue = 0, invalue = 0;
unsigned long msrval;
struct cpufreq_freqs freqs;
if (clock_ratio[best_i].index > max_multiplier) {
printk(KERN_ERR "cpufreq: invalid target frequency\n");
printk(KERN_ERR PFX "invalid target frequency\n");
return;
}
......@@ -119,7 +121,8 @@ static int powernow_k6_verify(struct cpufreq_policy *policy)
* powernow_k6_setpolicy - sets a new CPUFreq policy
* @policy: new policy
* @target_freq: the target frequency
* @relation: how that frequency relates to achieved frequency (CPUFREQ_RELATION_L or CPUFREQ_RELATION_H)
* @relation: how that frequency relates to achieved frequency
* (CPUFREQ_RELATION_L or CPUFREQ_RELATION_H)
*
* sets a new CPUFreq policy
*/
......@@ -127,9 +130,10 @@ static int powernow_k6_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
{
unsigned int newstate = 0;
unsigned int newstate = 0;
if (cpufreq_frequency_table_target(policy, &clock_ratio[0], target_freq, relation, &newstate))
if (cpufreq_frequency_table_target(policy, &clock_ratio[0],
target_freq, relation, &newstate))
return -EINVAL;
powernow_k6_set_state(newstate);
......@@ -140,7 +144,7 @@ static int powernow_k6_target(struct cpufreq_policy *policy,
static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
{
unsigned int i;
unsigned int i, f;
int result;
if (policy->cpu != 0)
......@@ -152,10 +156,11 @@ static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
/* table init */
for (i = 0; (clock_ratio[i].frequency != CPUFREQ_TABLE_END); i++) {
if (clock_ratio[i].index > max_multiplier)
f = clock_ratio[i].index;
if (f > max_multiplier)
clock_ratio[i].frequency = CPUFREQ_ENTRY_INVALID;
else
clock_ratio[i].frequency = busfreq * clock_ratio[i].index;
clock_ratio[i].frequency = busfreq * f;
}
/* cpuinfo and default policy values */
......@@ -185,7 +190,9 @@ static int powernow_k6_cpu_exit(struct cpufreq_policy *policy)
static unsigned int powernow_k6_get(unsigned int cpu)
{
return busfreq * powernow_k6_get_cpu_multiplier();
unsigned int ret;
ret = (busfreq * powernow_k6_get_cpu_multiplier());
return ret;
}
static struct freq_attr *powernow_k6_attr[] = {
......@@ -221,7 +228,7 @@ static int __init powernow_k6_init(void)
return -ENODEV;
if (!request_region(POWERNOW_IOPORT, 16, "PowerNow!")) {
printk("cpufreq: PowerNow IOPORT region already used.\n");
printk(KERN_INFO PFX "PowerNow IOPORT region already used.\n");
return -EIO;
}
......@@ -246,7 +253,8 @@ static void __exit powernow_k6_exit(void)
}
MODULE_AUTHOR("Arjan van de Ven, Dave Jones <davej@redhat.com>, Dominik Brodowski <linux@brodo.de>");
MODULE_AUTHOR("Arjan van de Ven, Dave Jones <davej@redhat.com>, "
"Dominik Brodowski <linux@brodo.de>");
MODULE_DESCRIPTION("PowerNow! driver for AMD K6-2+ / K6-3+ processors.");
MODULE_LICENSE("GPL");
......
arch/x86/kernel/cpu/cpufreq/powernow-k7.c
浏览文件 @ ada19a31
......@@ -6,10 +6,12 @@
* Licensed under the terms of the GNU GPL License version 2.
* Based upon datasheets & sample CPUs kindly provided by AMD.
*
* Errata 5: Processor may fail to execute a FID/VID change in presence of interrupt.
* - We cli/sti on stepping A0 CPUs around the FID/VID transition.
* Errata 15: Processors with half frequency multipliers may hang upon wakeup from disconnect.
* - We disable half multipliers if ACPI is used on A0 stepping CPUs.
* Errata 5:
* CPU may fail to execute a FID/VID change in presence of interrupt.
* - We cli/sti on stepping A0 CPUs around the FID/VID transition.
* Errata 15:
* CPU with half frequency multipliers may hang upon wakeup from disconnect.
* - We disable half multipliers if ACPI is used on A0 stepping CPUs.
*/
#include <linux/kernel.h>
......@@ -20,11 +22,11 @@
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/dmi.h>
#include <linux/timex.h>
#include <linux/io.h>
#include <asm/timer.h> /* Needed for recalibrate_cpu_khz() */
#include <asm/msr.h>
#include <asm/timer.h>
#include <asm/timex.h>
#include <asm/io.h>
#include <asm/system.h>
#ifdef CONFIG_X86_POWERNOW_K7_ACPI
......@@ -58,9 +60,9 @@ struct pst_s {
union powernow_acpi_control_t {
struct {
unsigned long fid:5,
vid:5,
sgtc:20,
res1:2;
vid:5,
sgtc:20,
res1:2;
} bits;
unsigned long val;
};
......@@ -94,14 +96,15 @@ static struct cpufreq_frequency_table *powernow_table;
static unsigned int can_scale_bus;
static unsigned int can_scale_vid;
static unsigned int minimum_speed=-1;
static unsigned int minimum_speed = -1;
static unsigned int maximum_speed;
static unsigned int number_scales;
static unsigned int fsb;
static unsigned int latency;
static char have_a0;
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "powernow-k7", msg)
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
"powernow-k7", msg)
static int check_fsb(unsigned int fsbspeed)
{
......@@ -109,7 +112,7 @@ static int check_fsb(unsigned int fsbspeed)
unsigned int f = fsb / 1000;
delta = (fsbspeed > f) ? fsbspeed - f : f - fsbspeed;
return (delta < 5);
return delta < 5;
}
static int check_powernow(void)
......@@ -117,24 +120,26 @@ static int check_powernow(void)
struct cpuinfo_x86 *c = &cpu_data(0);
unsigned int maxei, eax, ebx, ecx, edx;
if ((c->x86_vendor != X86_VENDOR_AMD) || (c->x86 !=6)) {
if ((c->x86_vendor != X86_VENDOR_AMD) || (c->x86 != 6)) {
#ifdef MODULE
printk (KERN_INFO PFX "This module only works with AMD K7 CPUs\n");
printk(KERN_INFO PFX "This module only works with "
"AMD K7 CPUs\n");
#endif
return 0;
}
/* Get maximum capabilities */
maxei = cpuid_eax (0x80000000);
maxei = cpuid_eax(0x80000000);
if (maxei < 0x80000007) { /* Any powernow info ? */
#ifdef MODULE
printk (KERN_INFO PFX "No powernow capabilities detected\n");
printk(KERN_INFO PFX "No powernow capabilities detected\n");
#endif
return 0;
}
if ((c->x86_model == 6) && (c->x86_mask == 0)) {
printk (KERN_INFO PFX "K7 660[A0] core detected, enabling errata workarounds\n");
printk(KERN_INFO PFX "K7 660[A0] core detected, "
"enabling errata workarounds\n");
have_a0 = 1;
}
......@@ -144,37 +149,42 @@ static int check_powernow(void)
if (!(edx & (1 << 1 | 1 << 2)))
return 0;
printk (KERN_INFO PFX "PowerNOW! Technology present. Can scale: ");
printk(KERN_INFO PFX "PowerNOW! Technology present. Can scale: ");
if (edx & 1 << 1) {
printk ("frequency");
can_scale_bus=1;
printk("frequency");
can_scale_bus = 1;
}
if ((edx & (1 << 1 | 1 << 2)) == 0x6)
printk (" and ");
printk(" and ");
if (edx & 1 << 2) {
printk ("voltage");
can_scale_vid=1;
printk("voltage");
can_scale_vid = 1;
}
printk (".\n");
printk(".\n");
return 1;
}
static void invalidate_entry(unsigned int entry)
{
powernow_table[entry].frequency = CPUFREQ_ENTRY_INVALID;
}
static int get_ranges (unsigned char *pst)
static int get_ranges(unsigned char *pst)
{
unsigned int j;
unsigned int speed;
u8 fid, vid;
powernow_table = kzalloc((sizeof(struct cpufreq_frequency_table) * (number_scales + 1)), GFP_KERNEL);
powernow_table = kzalloc((sizeof(struct cpufreq_frequency_table) *
(number_scales + 1)), GFP_KERNEL);
if (!powernow_table)
return -ENOMEM;
for (j=0 ; j < number_scales; j++) {
for (j = 0 ; j < number_scales; j++) {
fid = *pst++;
powernow_table[j].frequency = (fsb * fid_codes[fid]) / 10;
......@@ -182,10 +192,10 @@ static int get_ranges (unsigned char *pst)
speed = powernow_table[j].frequency;
if ((fid_codes[fid] % 10)==5) {
if ((fid_codes[fid] % 10) == 5) {
#ifdef CONFIG_X86_POWERNOW_K7_ACPI
if (have_a0 == 1)
powernow_table[j].frequency = CPUFREQ_ENTRY_INVALID;
invalidate_entry(j);
#endif
}
......@@ -197,7 +207,7 @@ static int get_ranges (unsigned char *pst)
vid = *pst++;
powernow_table[j].index |= (vid << 8); /* upper 8 bits */
dprintk (" FID: 0x%x (%d.%dx [%dMHz]) "
dprintk(" FID: 0x%x (%d.%dx [%dMHz]) "
"VID: 0x%x (%d.%03dV)\n", fid, fid_codes[fid] / 10,
fid_codes[fid] % 10, speed/1000, vid,
mobile_vid_table[vid]/1000,
......@@ -214,13 +224,13 @@ static void change_FID(int fid)
{
union msr_fidvidctl fidvidctl;
rdmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
rdmsrl(MSR_K7_FID_VID_CTL, fidvidctl.val);
if (fidvidctl.bits.FID != fid) {
fidvidctl.bits.SGTC = latency;
fidvidctl.bits.FID = fid;
fidvidctl.bits.VIDC = 0;
fidvidctl.bits.FIDC = 1;
wrmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
wrmsrl(MSR_K7_FID_VID_CTL, fidvidctl.val);
}
}
......@@ -229,18 +239,18 @@ static void change_VID(int vid)
{
union msr_fidvidctl fidvidctl;
rdmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
rdmsrl(MSR_K7_FID_VID_CTL, fidvidctl.val);
if (fidvidctl.bits.VID != vid) {
fidvidctl.bits.SGTC = latency;
fidvidctl.bits.VID = vid;
fidvidctl.bits.FIDC = 0;
fidvidctl.bits.VIDC = 1;
wrmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
wrmsrl(MSR_K7_FID_VID_CTL, fidvidctl.val);
}
}
static void change_speed (unsigned int index)
static void change_speed(unsigned int index)
{
u8 fid, vid;
struct cpufreq_freqs freqs;
......@@ -257,7 +267,7 @@ static void change_speed (unsigned int index)
freqs.cpu = 0;
rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val);
rdmsrl(MSR_K7_FID_VID_STATUS, fidvidstatus.val);
cfid = fidvidstatus.bits.CFID;
freqs.old = fsb * fid_codes[cfid] / 10;
......@@ -321,12 +331,14 @@ static int powernow_acpi_init(void)
goto err1;
}
if (acpi_processor_perf->control_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) {
if (acpi_processor_perf->control_register.space_id !=
ACPI_ADR_SPACE_FIXED_HARDWARE) {
retval = -ENODEV;
goto err2;
}
if (acpi_processor_perf->status_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) {
if (acpi_processor_perf->status_register.space_id !=
ACPI_ADR_SPACE_FIXED_HARDWARE) {
retval = -ENODEV;
goto err2;
}
......@@ -338,7 +350,8 @@ static int powernow_acpi_init(void)
goto err2;
}
powernow_table = kzalloc((number_scales + 1) * (sizeof(struct cpufreq_frequency_table)), GFP_KERNEL);
powernow_table = kzalloc((sizeof(struct cpufreq_frequency_table) *
(number_scales + 1)), GFP_KERNEL);
if (!powernow_table) {
retval = -ENOMEM;
goto err2;
......@@ -352,7 +365,7 @@ static int powernow_acpi_init(void)
unsigned int speed, speed_mhz;
pc.val = (unsigned long) state->control;
dprintk ("acpi: P%d: %d MHz %d mW %d uS control %08x SGTC %d\n",
dprintk("acpi: P%d: %d MHz %d mW %d uS control %08x SGTC %d\n",
i,
(u32) state->core_frequency,
(u32) state->power,
......@@ -381,12 +394,12 @@ static int powernow_acpi_init(void)
if (speed % 1000 > 0)
speed_mhz++;
if ((fid_codes[fid] % 10)==5) {
if ((fid_codes[fid] % 10) == 5) {
if (have_a0 == 1)
powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID;
invalidate_entry(i);
}
dprintk (" FID: 0x%x (%d.%dx [%dMHz]) "
dprintk(" FID: 0x%x (%d.%dx [%dMHz]) "
"VID: 0x%x (%d.%03dV)\n", fid, fid_codes[fid] / 10,
fid_codes[fid] % 10, speed_mhz, vid,
mobile_vid_table[vid]/1000,
......@@ -422,7 +435,8 @@ static int powernow_acpi_init(void)
err05:
kfree(acpi_processor_perf);
err0:
printk(KERN_WARNING PFX "ACPI perflib can not be used in this platform\n");
printk(KERN_WARNING PFX "ACPI perflib can not be used on "
"this platform\n");
acpi_processor_perf = NULL;
return retval;
}
......@@ -435,7 +449,14 @@ static int powernow_acpi_init(void)
}
#endif
static int powernow_decode_bios (int maxfid, int startvid)
static void print_pst_entry(struct pst_s *pst, unsigned int j)
{
dprintk("PST:%d (@%p)\n", j, pst);
dprintk(" cpuid: 0x%x fsb: %d maxFID: 0x%x startvid: 0x%x\n",
pst->cpuid, pst->fsbspeed, pst->maxfid, pst->startvid);
}
static int powernow_decode_bios(int maxfid, int startvid)
{
struct psb_s *psb;
struct pst_s *pst;
......@@ -446,61 +467,67 @@ static int powernow_decode_bios (int maxfid, int startvid)
etuple = cpuid_eax(0x80000001);
for (i=0xC0000; i < 0xffff0 ; i+=16) {
for (i = 0xC0000; i < 0xffff0 ; i += 16) {
p = phys_to_virt(i);
if (memcmp(p, "AMDK7PNOW!", 10) == 0){
dprintk ("Found PSB header at %p\n", p);
if (memcmp(p, "AMDK7PNOW!", 10) == 0) {
dprintk("Found PSB header at %p\n", p);
psb = (struct psb_s *) p;
dprintk ("Table version: 0x%x\n", psb->tableversion);
dprintk("Table version: 0x%x\n", psb->tableversion);
if (psb->tableversion != 0x12) {
printk (KERN_INFO PFX "Sorry, only v1.2 tables supported right now\n");
printk(KERN_INFO PFX "Sorry, only v1.2 tables"
" supported right now\n");
return -ENODEV;
}
dprintk ("Flags: 0x%x\n", psb->flags);
if ((psb->flags & 1)==0) {
dprintk ("Mobile voltage regulator\n");
} else {
dprintk ("Desktop voltage regulator\n");
}
dprintk("Flags: 0x%x\n", psb->flags);
if ((psb->flags & 1) == 0)
dprintk("Mobile voltage regulator\n");
else
dprintk("Desktop voltage regulator\n");
latency = psb->settlingtime;
if (latency < 100) {
printk(KERN_INFO PFX "BIOS set settling time to %d microseconds. "
"Should be at least 100. Correcting.\n", latency);
printk(KERN_INFO PFX "BIOS set settling time "
"to %d microseconds. "
"Should be at least 100. "
"Correcting.\n", latency);
latency = 100;
}
dprintk ("Settling Time: %d microseconds.\n", psb->settlingtime);
dprintk ("Has %d PST tables. (Only dumping ones relevant to this CPU).\n", psb->numpst);
dprintk("Settling Time: %d microseconds.\n",
psb->settlingtime);
dprintk("Has %d PST tables. (Only dumping ones "
"relevant to this CPU).\n",
psb->numpst);
p += sizeof (struct psb_s);
p += sizeof(struct psb_s);
pst = (struct pst_s *) p;
for (j=0; j<psb->numpst; j++) {
for (j = 0; j < psb->numpst; j++) {
pst = (struct pst_s *) p;
number_scales = pst->numpstates;
if ((etuple == pst->cpuid) && check_fsb(pst->fsbspeed) &&
(maxfid==pst->maxfid) && (startvid==pst->startvid))
{
dprintk ("PST:%d (@%p)\n", j, pst);
dprintk (" cpuid: 0x%x fsb: %d maxFID: 0x%x startvid: 0x%x\n",
pst->cpuid, pst->fsbspeed, pst->maxfid, pst->startvid);
ret = get_ranges ((char *) pst + sizeof (struct pst_s));
if ((etuple == pst->cpuid) &&
check_fsb(pst->fsbspeed) &&
(maxfid == pst->maxfid) &&
(startvid == pst->startvid)) {
print_pst_entry(pst, j);
p = (char *)pst + sizeof(struct pst_s);
ret = get_ranges(p);
return ret;
} else {
unsigned int k;
p = (char *) pst + sizeof (struct pst_s);
for (k=0; k<number_scales; k++)
p+=2;
p = (char *)pst + sizeof(struct pst_s);
for (k = 0; k < number_scales; k++)
p += 2;
}
}
printk (KERN_INFO PFX "No PST tables match this cpuid (0x%x)\n", etuple);
printk (KERN_INFO PFX "This is indicative of a broken BIOS.\n");
printk(KERN_INFO PFX "No PST tables match this cpuid "
"(0x%x)\n", etuple);
printk(KERN_INFO PFX "This is indicative of a broken "
"BIOS.\n");
return -EINVAL;
}
......@@ -511,13 +538,14 @@ static int powernow_decode_bios (int maxfid, int startvid)
}
static int powernow_target (struct cpufreq_policy *policy,
static int powernow_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
{
unsigned int newstate;
if (cpufreq_frequency_table_target(policy, powernow_table, target_freq, relation, &newstate))
if (cpufreq_frequency_table_target(policy, powernow_table, target_freq,
relation, &newstate))
return -EINVAL;
change_speed(newstate);
......@@ -526,7 +554,7 @@ static int powernow_target (struct cpufreq_policy *policy,
}
static int powernow_verify (struct cpufreq_policy *policy)
static int powernow_verify(struct cpufreq_policy *policy)
{
return cpufreq_frequency_table_verify(policy, powernow_table);
}
......@@ -566,18 +594,23 @@ static unsigned int powernow_get(unsigned int cpu)
if (cpu)
return 0;
rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val);
rdmsrl(MSR_K7_FID_VID_STATUS, fidvidstatus.val);
cfid = fidvidstatus.bits.CFID;
return (fsb * fid_codes[cfid] / 10);
return fsb * fid_codes[cfid] / 10;
}
static int __init acer_cpufreq_pst(const struct dmi_system_id *d)
{
printk(KERN_WARNING "%s laptop with broken PST tables in BIOS detected.\n", d->ident);
printk(KERN_WARNING "You need to downgrade to 3A21 (09/09/2002), or try a newer BIOS than 3A71 (01/20/2003)\n");
printk(KERN_WARNING "cpufreq scaling has been disabled as a result of this.\n");
printk(KERN_WARNING PFX
"%s laptop with broken PST tables in BIOS detected.\n",
d->ident);
printk(KERN_WARNING PFX
"You need to downgrade to 3A21 (09/09/2002), or try a newer "
"BIOS than 3A71 (01/20/2003)\n");
printk(KERN_WARNING PFX
"cpufreq scaling has been disabled as a result of this.\n");
return 0;
}
......@@ -598,7 +631,7 @@ static struct dmi_system_id __initdata powernow_dmi_table[] = {
{ }
};
static int __init powernow_cpu_init (struct cpufreq_policy *policy)
static int __init powernow_cpu_init(struct cpufreq_policy *policy)
{
union msr_fidvidstatus fidvidstatus;
int result;
......@@ -606,7 +639,7 @@ static int __init powernow_cpu_init (struct cpufreq_policy *policy)
if (policy->cpu != 0)
return -ENODEV;
rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val);
rdmsrl(MSR_K7_FID_VID_STATUS, fidvidstatus.val);
recalibrate_cpu_khz();
......@@ -618,19 +651,21 @@ static int __init powernow_cpu_init (struct cpufreq_policy *policy)
dprintk("FSB: %3dMHz\n", fsb/1000);
if (dmi_check_system(powernow_dmi_table) || acpi_force) {
printk (KERN_INFO PFX "PSB/PST known to be broken. Trying ACPI instead\n");
printk(KERN_INFO PFX "PSB/PST known to be broken. "
"Trying ACPI instead\n");
result = powernow_acpi_init();
} else {
result = powernow_decode_bios(fidvidstatus.bits.MFID, fidvidstatus.bits.SVID);
result = powernow_decode_bios(fidvidstatus.bits.MFID,
fidvidstatus.bits.SVID);
if (result) {
printk (KERN_INFO PFX "Trying ACPI perflib\n");
printk(KERN_INFO PFX "Trying ACPI perflib\n");
maximum_speed = 0;
minimum_speed = -1;
latency = 0;
result = powernow_acpi_init();
if (result) {
printk (KERN_INFO PFX "ACPI and legacy methods failed\n");
printk (KERN_INFO PFX "See http://www.codemonkey.org.uk/projects/cpufreq/powernow-k7.html\n");
printk(KERN_INFO PFX
"ACPI and legacy methods failed\n");
}
} else {
/* SGTC use the bus clock as timer */
......@@ -642,10 +677,11 @@ static int __init powernow_cpu_init (struct cpufreq_policy *policy)
if (result)
return result;
printk (KERN_INFO PFX "Minimum speed %d MHz. Maximum speed %d MHz.\n",
printk(KERN_INFO PFX "Minimum speed %d MHz. Maximum speed %d MHz.\n",
minimum_speed/1000, maximum_speed/1000);
policy->cpuinfo.transition_latency = cpufreq_scale(2000000UL, fsb, latency);
policy->cpuinfo.transition_latency =
cpufreq_scale(2000000UL, fsb, latency);
policy->cur = powernow_get(0);
......@@ -654,7 +690,8 @@ static int __init powernow_cpu_init (struct cpufreq_policy *policy)
return cpufreq_frequency_table_cpuinfo(policy, powernow_table);
}
static int powernow_cpu_exit (struct cpufreq_policy *policy) {
static int powernow_cpu_exit(struct cpufreq_policy *policy)
{
cpufreq_frequency_table_put_attr(policy->cpu);
#ifdef CONFIG_X86_POWERNOW_K7_ACPI
......@@ -669,7 +706,7 @@ static int powernow_cpu_exit (struct cpufreq_policy *policy) {
return 0;
}
static struct freq_attr* powernow_table_attr[] = {
static struct freq_attr *powernow_table_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
NULL,
};
......@@ -685,15 +722,15 @@ static struct cpufreq_driver powernow_driver = {
.attr = powernow_table_attr,
};
static int __init powernow_init (void)
static int __init powernow_init(void)
{
if (check_powernow()==0)
if (check_powernow() == 0)
return -ENODEV;
return cpufreq_register_driver(&powernow_driver);
}
static void __exit powernow_exit (void)
static void __exit powernow_exit(void)
{
cpufreq_unregister_driver(&powernow_driver);
}
......@@ -701,9 +738,9 @@ static void __exit powernow_exit (void)
module_param(acpi_force, int, 0444);
MODULE_PARM_DESC(acpi_force, "Force ACPI to be used.");
MODULE_AUTHOR ("Dave Jones <davej@redhat.com>");
MODULE_DESCRIPTION ("Powernow driver for AMD K7 processors.");
MODULE_LICENSE ("GPL");
MODULE_AUTHOR("Dave Jones <davej@redhat.com>");
MODULE_DESCRIPTION("Powernow driver for AMD K7 processors.");
MODULE_LICENSE("GPL");
late_initcall(powernow_init);
module_exit(powernow_exit);
......
arch/x86/kernel/cpu/cpufreq/powernow-k8.h
浏览文件 @ ada19a31
......@@ -45,11 +45,10 @@ struct powernow_k8_data {
* frequency is in kHz */
struct cpufreq_frequency_table *powernow_table;
#ifdef CONFIG_X86_POWERNOW_K8_ACPI
/* the acpi table needs to be kept. it's only available if ACPI was
* used to determine valid frequency/vid/fid states */
struct acpi_processor_performance acpi_data;
#endif
/* we need to keep track of associated cores, but let cpufreq
* handle hotplug events - so just point at cpufreq pol->cpus
* structure */
......@@ -222,10 +221,8 @@ static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid);
static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, unsigned int index);
#ifdef CONFIG_X86_POWERNOW_K8_ACPI
static int fill_powernow_table_pstate(struct powernow_k8_data *data, struct cpufreq_frequency_table *powernow_table);
static int fill_powernow_table_fidvid(struct powernow_k8_data *data, struct cpufreq_frequency_table *powernow_table);
#endif
#ifdef CONFIG_SMP
static inline void define_siblings(int cpu, cpumask_t cpu_sharedcore_mask[])
......
arch/x86/kernel/cpu/cpufreq/sc520_freq.c
浏览文件 @ ada19a31
......@@ -19,17 +19,19 @@
#include <linux/delay.h>
#include <linux/cpufreq.h>
#include <linux/timex.h>
#include <linux/io.h>
#include <asm/msr.h>
#include <asm/timex.h>
#include <asm/io.h>
#define MMCR_BASE 0xfffef000 /* The default base address */
#define OFFS_CPUCTL 0x2 /* CPU Control Register */
static __u8 __iomem *cpuctl;
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "sc520_freq", msg)
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
"sc520_freq", msg)
#define PFX "sc520_freq: "
static struct cpufreq_frequency_table sc520_freq_table[] = {
{0x01, 100000},
......@@ -43,7 +45,8 @@ static unsigned int sc520_freq_get_cpu_frequency(unsigned int cpu)
switch (clockspeed_reg & 0x03) {
default:
printk(KERN_ERR "sc520_freq: error: cpuctl register has unexpected value %02x\n", clockspeed_reg);
printk(KERN_ERR PFX "error: cpuctl register has unexpected "
"value %02x\n", clockspeed_reg);
case 0x01:
return 100000;
case 0x02:
......@@ -51,7 +54,7 @@ static unsigned int sc520_freq_get_cpu_frequency(unsigned int cpu)
}
}
static void sc520_freq_set_cpu_state (unsigned int state)
static void sc520_freq_set_cpu_state(unsigned int state)
{
struct cpufreq_freqs freqs;
......@@ -76,18 +79,19 @@ static void sc520_freq_set_cpu_state (unsigned int state)
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
};
static int sc520_freq_verify (struct cpufreq_policy *policy)
static int sc520_freq_verify(struct cpufreq_policy *policy)
{
return cpufreq_frequency_table_verify(policy, &sc520_freq_table[0]);
}
static int sc520_freq_target (struct cpufreq_policy *policy,
static int sc520_freq_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
{
unsigned int newstate = 0;
if (cpufreq_frequency_table_target(policy, sc520_freq_table, target_freq, relation, &newstate))
if (cpufreq_frequency_table_target(policy, sc520_freq_table,
target_freq, relation, &newstate))
return -EINVAL;
sc520_freq_set_cpu_state(newstate);
......@@ -116,7 +120,7 @@ static int sc520_freq_cpu_init(struct cpufreq_policy *policy)
result = cpufreq_frequency_table_cpuinfo(policy, sc520_freq_table);
if (result)
return (result);
return result;
cpufreq_frequency_table_get_attr(sc520_freq_table, policy->cpu);
......@@ -131,7 +135,7 @@ static int sc520_freq_cpu_exit(struct cpufreq_policy *policy)
}
static struct freq_attr* sc520_freq_attr[] = {
static struct freq_attr *sc520_freq_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
NULL,
};
......@@ -155,13 +159,13 @@ static int __init sc520_freq_init(void)
int err;
/* Test if we have the right hardware */
if(c->x86_vendor != X86_VENDOR_AMD ||
c->x86 != 4 || c->x86_model != 9) {
if (c->x86_vendor != X86_VENDOR_AMD ||
c->x86 != 4 || c->x86_model != 9) {
dprintk("no Elan SC520 processor found!\n");
return -ENODEV;
}
cpuctl = ioremap((unsigned long)(MMCR_BASE + OFFS_CPUCTL), 1);
if(!cpuctl) {
if (!cpuctl) {
printk(KERN_ERR "sc520_freq: error: failed to remap memory\n");
return -ENOMEM;
}
......
arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
浏览文件 @ ada19a31
......@@ -39,7 +39,7 @@ static struct pci_dev *speedstep_chipset_dev;
/* speedstep_processor
*/
static unsigned int speedstep_processor = 0;
static unsigned int speedstep_processor;
static u32 pmbase;
......@@ -54,7 +54,8 @@ static struct cpufreq_frequency_table speedstep_freqs[] = {
};
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "speedstep-ich", msg)
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
"speedstep-ich", msg)
/**
......@@ -62,7 +63,7 @@ static struct cpufreq_frequency_table speedstep_freqs[] = {
*
* Returns: -ENODEV if no register could be found
*/
static int speedstep_find_register (void)
static int speedstep_find_register(void)
{
if (!speedstep_chipset_dev)
return -ENODEV;
......@@ -90,7 +91,7 @@ static int speedstep_find_register (void)
*
* Tries to change the SpeedStep state.
*/
static void speedstep_set_state (unsigned int state)
static void speedstep_set_state(unsigned int state)
{
u8 pm2_blk;
u8 value;
......@@ -133,11 +134,11 @@ static void speedstep_set_state (unsigned int state)
dprintk("read at pmbase 0x%x + 0x50 returned 0x%x\n", pmbase, value);
if (state == (value & 0x1)) {
dprintk("change to %u MHz succeeded\n", (speedstep_get_processor_frequency(speedstep_processor) / 1000));
} else {
printk (KERN_ERR "cpufreq: change failed - I/O error\n");
}
if (state == (value & 0x1))
dprintk("change to %u MHz succeeded\n",
speedstep_get_frequency(speedstep_processor) / 1000);
else
printk(KERN_ERR "cpufreq: change failed - I/O error\n");
return;
}
......@@ -149,7 +150,7 @@ static void speedstep_set_state (unsigned int state)
* Tries to activate the SpeedStep status and control registers.
* Returns -EINVAL on an unsupported chipset, and zero on success.
*/
static int speedstep_activate (void)
static int speedstep_activate(void)
{
u16 value = 0;
......@@ -175,20 +176,18 @@ static int speedstep_activate (void)
* functions. Returns the SPEEDSTEP_CHIPSET_-number for the detected
* chipset, or zero on failure.
*/
static unsigned int speedstep_detect_chipset (void)
static unsigned int speedstep_detect_chipset(void)
{
speedstep_chipset_dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_82801DB_12,
PCI_ANY_ID,
PCI_ANY_ID,
PCI_ANY_ID, PCI_ANY_ID,
NULL);
if (speedstep_chipset_dev)
return 4; /* 4-M */
speedstep_chipset_dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_82801CA_12,
PCI_ANY_ID,
PCI_ANY_ID,
PCI_ANY_ID, PCI_ANY_ID,
NULL);
if (speedstep_chipset_dev)
return 3; /* 3-M */
......@@ -196,8 +195,7 @@ static unsigned int speedstep_detect_chipset (void)
speedstep_chipset_dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_82801BA_10,
PCI_ANY_ID,
PCI_ANY_ID,
PCI_ANY_ID, PCI_ANY_ID,
NULL);
if (speedstep_chipset_dev) {
/* speedstep.c causes lockups on Dell Inspirons 8000 and
......@@ -208,8 +206,7 @@ static unsigned int speedstep_detect_chipset (void)
hostbridge = pci_get_subsys(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_82815_MC,
PCI_ANY_ID,
PCI_ANY_ID,
PCI_ANY_ID, PCI_ANY_ID,
NULL);
if (!hostbridge)
......@@ -236,7 +233,7 @@ static unsigned int _speedstep_get(const struct cpumask *cpus)
cpus_allowed = current->cpus_allowed;
set_cpus_allowed_ptr(current, cpus);
speed = speedstep_get_processor_frequency(speedstep_processor);
speed = speedstep_get_frequency(speedstep_processor);
set_cpus_allowed_ptr(current, &cpus_allowed);
dprintk("detected %u kHz as current frequency\n", speed);
return speed;
......@@ -251,11 +248,12 @@ static unsigned int speedstep_get(unsigned int cpu)
* speedstep_target - set a new CPUFreq policy
* @policy: new policy
* @target_freq: the target frequency
* @relation: how that frequency relates to achieved frequency (CPUFREQ_RELATION_L or CPUFREQ_RELATION_H)
* @relation: how that frequency relates to achieved frequency
* (CPUFREQ_RELATION_L or CPUFREQ_RELATION_H)
*
* Sets a new CPUFreq policy.
*/
static int speedstep_target (struct cpufreq_policy *policy,
static int speedstep_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
{
......@@ -264,7 +262,8 @@ static int speedstep_target (struct cpufreq_policy *policy,
cpumask_t cpus_allowed;
int i;
if (cpufreq_frequency_table_target(policy, &speedstep_freqs[0], target_freq, relation, &newstate))
if (cpufreq_frequency_table_target(policy, &speedstep_freqs[0],
target_freq, relation, &newstate))
return -EINVAL;
freqs.old = _speedstep_get(policy->cpus);
......@@ -308,7 +307,7 @@ static int speedstep_target (struct cpufreq_policy *policy,
* Limit must be within speedstep_low_freq and speedstep_high_freq, with
* at least one border included.
*/
static int speedstep_verify (struct cpufreq_policy *policy)
static int speedstep_verify(struct cpufreq_policy *policy)
{
return cpufreq_frequency_table_verify(policy, &speedstep_freqs[0]);
}
......@@ -344,7 +343,8 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
return -EIO;
dprintk("currently at %s speed setting - %i MHz\n",
(speed == speedstep_freqs[SPEEDSTEP_LOW].frequency) ? "low" : "high",
(speed == speedstep_freqs[SPEEDSTEP_LOW].frequency)
? "low" : "high",
(speed / 1000));
/* cpuinfo and default policy values */
......@@ -352,9 +352,9 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
result = cpufreq_frequency_table_cpuinfo(policy, speedstep_freqs);
if (result)
return (result);
return result;
cpufreq_frequency_table_get_attr(speedstep_freqs, policy->cpu);
cpufreq_frequency_table_get_attr(speedstep_freqs, policy->cpu);
return 0;
}
......@@ -366,7 +366,7 @@ static int speedstep_cpu_exit(struct cpufreq_policy *policy)
return 0;
}
static struct freq_attr* speedstep_attr[] = {
static struct freq_attr *speedstep_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
NULL,
};
......@@ -396,13 +396,15 @@ static int __init speedstep_init(void)
/* detect processor */
speedstep_processor = speedstep_detect_processor();
if (!speedstep_processor) {
dprintk("Intel(R) SpeedStep(TM) capable processor not found\n");
dprintk("Intel(R) SpeedStep(TM) capable processor "
"not found\n");
return -ENODEV;
}
/* detect chipset */
if (!speedstep_detect_chipset()) {
dprintk("Intel(R) SpeedStep(TM) for this chipset not (yet) available.\n");
dprintk("Intel(R) SpeedStep(TM) for this chipset not "
"(yet) available.\n");
return -ENODEV;
}
......@@ -431,9 +433,11 @@ static void __exit speedstep_exit(void)
}
MODULE_AUTHOR ("Dave Jones <davej@redhat.com>, Dominik Brodowski <linux@brodo.de>");
MODULE_DESCRIPTION ("Speedstep driver for Intel mobile processors on chipsets with ICH-M southbridges.");
MODULE_LICENSE ("GPL");
MODULE_AUTHOR("Dave Jones <davej@redhat.com>, "
"Dominik Brodowski <linux@brodo.de>");
MODULE_DESCRIPTION("Speedstep driver for Intel mobile processors on chipsets "
"with ICH-M southbridges.");
MODULE_LICENSE("GPL");
module_init(speedstep_init);
module_exit(speedstep_exit);
arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
浏览文件 @ ada19a31
......@@ -16,12 +16,16 @@
#include <linux/slab.h>
#include <asm/msr.h>
#include <asm/tsc.h>
#include "speedstep-lib.h"
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "speedstep-lib", msg)
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
"speedstep-lib", msg)
#define PFX "speedstep-lib: "
#ifdef CONFIG_X86_SPEEDSTEP_RELAXED_CAP_CHECK
static int relaxed_check = 0;
static int relaxed_check;
#else
#define relaxed_check 0
#endif
......@@ -30,14 +34,14 @@ static int relaxed_check = 0;
* GET PROCESSOR CORE SPEED IN KHZ *
*********************************************************************/
static unsigned int pentium3_get_frequency (unsigned int processor)
static unsigned int pentium3_get_frequency(unsigned int processor)
{
/* See table 14 of p3_ds.pdf and table 22 of 29834003.pdf */
/* See table 14 of p3_ds.pdf and table 22 of 29834003.pdf */
struct {
unsigned int ratio; /* Frequency Multiplier (x10) */
u8 bitmap; /* power on configuration bits
[27, 25:22] (in MSR 0x2a) */
} msr_decode_mult [] = {
} msr_decode_mult[] = {
{ 30, 0x01 },
{ 35, 0x05 },
{ 40, 0x02 },
......@@ -52,7 +56,7 @@ static unsigned int pentium3_get_frequency (unsigned int processor)
{ 85, 0x26 },
{ 90, 0x20 },
{ 100, 0x2b },
{ 0, 0xff } /* error or unknown value */
{ 0, 0xff } /* error or unknown value */
};
/* PIII(-M) FSB settings: see table b1-b of 24547206.pdf */
......@@ -60,7 +64,7 @@ static unsigned int pentium3_get_frequency (unsigned int processor)
unsigned int value; /* Front Side Bus speed in MHz */
u8 bitmap; /* power on configuration bits [18: 19]
(in MSR 0x2a) */
} msr_decode_fsb [] = {
} msr_decode_fsb[] = {
{ 66, 0x0 },
{ 100, 0x2 },
{ 133, 0x1 },
......@@ -85,7 +89,7 @@ static unsigned int pentium3_get_frequency (unsigned int processor)
}
/* decode the multiplier */
if (processor == SPEEDSTEP_PROCESSOR_PIII_C_EARLY) {
if (processor == SPEEDSTEP_CPU_PIII_C_EARLY) {
dprintk("workaround for early PIIIs\n");
msr_lo &= 0x03c00000;
} else
......@@ -97,9 +101,10 @@ static unsigned int pentium3_get_frequency (unsigned int processor)
j++;
}
dprintk("speed is %u\n", (msr_decode_mult[j].ratio * msr_decode_fsb[i].value * 100));
dprintk("speed is %u\n",
(msr_decode_mult[j].ratio * msr_decode_fsb[i].value * 100));
return (msr_decode_mult[j].ratio * msr_decode_fsb[i].value * 100);
return msr_decode_mult[j].ratio * msr_decode_fsb[i].value * 100;
}
......@@ -112,20 +117,23 @@ static unsigned int pentiumM_get_frequency(void)
/* see table B-2 of 24547212.pdf */
if (msr_lo & 0x00040000) {
printk(KERN_DEBUG "speedstep-lib: PM - invalid FSB: 0x%x 0x%x\n", msr_lo, msr_tmp);
printk(KERN_DEBUG PFX "PM - invalid FSB: 0x%x 0x%x\n",
msr_lo, msr_tmp);
return 0;
}
msr_tmp = (msr_lo >> 22) & 0x1f;
dprintk("bits 22-26 are 0x%x, speed is %u\n", msr_tmp, (msr_tmp * 100 * 1000));
dprintk("bits 22-26 are 0x%x, speed is %u\n",
msr_tmp, (msr_tmp * 100 * 1000));
return (msr_tmp * 100 * 1000);
return msr_tmp * 100 * 1000;
}
static unsigned int pentium_core_get_frequency(void)
{
u32 fsb = 0;
u32 msr_lo, msr_tmp;
int ret;
rdmsr(MSR_FSB_FREQ, msr_lo, msr_tmp);
/* see table B-2 of 25366920.pdf */
......@@ -153,12 +161,15 @@ static unsigned int pentium_core_get_frequency(void)
}
rdmsr(MSR_IA32_EBL_CR_POWERON, msr_lo, msr_tmp);
dprintk("PCORE - MSR_IA32_EBL_CR_POWERON: 0x%x 0x%x\n", msr_lo, msr_tmp);
dprintk("PCORE - MSR_IA32_EBL_CR_POWERON: 0x%x 0x%x\n",
msr_lo, msr_tmp);
msr_tmp = (msr_lo >> 22) & 0x1f;
dprintk("bits 22-26 are 0x%x, speed is %u\n", msr_tmp, (msr_tmp * fsb));
dprintk("bits 22-26 are 0x%x, speed is %u\n",
msr_tmp, (msr_tmp * fsb));
return (msr_tmp * fsb);
ret = (msr_tmp * fsb);
return ret;
}
......@@ -167,6 +178,16 @@ static unsigned int pentium4_get_frequency(void)
struct cpuinfo_x86 *c = &boot_cpu_data;
u32 msr_lo, msr_hi, mult;
unsigned int fsb = 0;
unsigned int ret;
u8 fsb_code;
/* Pentium 4 Model 0 and 1 do not have the Core Clock Frequency
* to System Bus Frequency Ratio Field in the Processor Frequency
* Configuration Register of the MSR. Therefore the current
* frequency cannot be calculated and has to be measured.
*/
if (c->x86_model < 2)
return cpu_khz;
rdmsr(0x2c, msr_lo, msr_hi);
......@@ -177,62 +198,61 @@ static unsigned int pentium4_get_frequency(void)
* revision #12 in Table B-1: MSRs in the Pentium 4 and
* Intel Xeon Processors, on page B-4 and B-5.
*/
if (c->x86_model < 2)
fsb_code = (msr_lo >> 16) & 0x7;
switch (fsb_code) {
case 0:
fsb = 100 * 1000;
else {
u8 fsb_code = (msr_lo >> 16) & 0x7;
switch (fsb_code) {
case 0:
fsb = 100 * 1000;
break;
case 1:
fsb = 13333 * 10;
break;
case 2:
fsb = 200 * 1000;
break;
}
break;
case 1:
fsb = 13333 * 10;
break;
case 2:
fsb = 200 * 1000;
break;
}
if (!fsb)
printk(KERN_DEBUG "speedstep-lib: couldn't detect FSB speed. Please send an e-mail to <linux@brodo.de>\n");
printk(KERN_DEBUG PFX "couldn't detect FSB speed. "
"Please send an e-mail to <linux@brodo.de>\n");
/* Multiplier. */
mult = msr_lo >> 24;
dprintk("P4 - FSB %u kHz; Multiplier %u; Speed %u kHz\n", fsb, mult, (fsb * mult));
dprintk("P4 - FSB %u kHz; Multiplier %u; Speed %u kHz\n",
fsb, mult, (fsb * mult));
return (fsb * mult);
ret = (fsb * mult);
return ret;
}
unsigned int speedstep_get_processor_frequency(unsigned int processor)
unsigned int speedstep_get_frequency(unsigned int processor)
{
switch (processor) {
case SPEEDSTEP_PROCESSOR_PCORE:
case SPEEDSTEP_CPU_PCORE:
return pentium_core_get_frequency();
case SPEEDSTEP_PROCESSOR_PM:
case SPEEDSTEP_CPU_PM:
return pentiumM_get_frequency();
case SPEEDSTEP_PROCESSOR_P4D:
case SPEEDSTEP_PROCESSOR_P4M:
case SPEEDSTEP_CPU_P4D:
case SPEEDSTEP_CPU_P4M:
return pentium4_get_frequency();
case SPEEDSTEP_PROCESSOR_PIII_T:
case SPEEDSTEP_PROCESSOR_PIII_C:
case SPEEDSTEP_PROCESSOR_PIII_C_EARLY:
case SPEEDSTEP_CPU_PIII_T:
case SPEEDSTEP_CPU_PIII_C:
case SPEEDSTEP_CPU_PIII_C_EARLY:
return pentium3_get_frequency(processor);
default:
return 0;
};
return 0;
}
EXPORT_SYMBOL_GPL(speedstep_get_processor_frequency);
EXPORT_SYMBOL_GPL(speedstep_get_frequency);
/*********************************************************************
* DETECT SPEEDSTEP-CAPABLE PROCESSOR *
*********************************************************************/
unsigned int speedstep_detect_processor (void)
unsigned int speedstep_detect_processor(void)
{
struct cpuinfo_x86 *c = &cpu_data(0);
u32 ebx, msr_lo, msr_hi;
......@@ -261,7 +281,7 @@ unsigned int speedstep_detect_processor (void)
* sample has ebx = 0x0f, production has 0x0e.
*/
if ((ebx == 0x0e) || (ebx == 0x0f))
return SPEEDSTEP_PROCESSOR_P4M;
return SPEEDSTEP_CPU_P4M;
break;
case 7:
/*
......@@ -272,7 +292,7 @@ unsigned int speedstep_detect_processor (void)
* samples are only of B-stepping...
*/
if (ebx == 0x0e)
return SPEEDSTEP_PROCESSOR_P4M;
return SPEEDSTEP_CPU_P4M;
break;
case 9:
/*
......@@ -288,10 +308,13 @@ unsigned int speedstep_detect_processor (void)
* M-P4-Ms may have either ebx=0xe or 0xf [see above]
* M-P4/533 have either ebx=0xe or 0xf. [25317607.pdf]
* also, M-P4M HTs have ebx=0x8, too
* For now, they are distinguished by the model_id string
* For now, they are distinguished by the model_id
* string
*/
if ((ebx == 0x0e) || (strstr(c->x86_model_id,"Mobile Intel(R) Pentium(R) 4") != NULL))
return SPEEDSTEP_PROCESSOR_P4M;
if ((ebx == 0x0e) ||
(strstr(c->x86_model_id,
"Mobile Intel(R) Pentium(R) 4") != NULL))
return SPEEDSTEP_CPU_P4M;
break;
default:
break;
......@@ -301,7 +324,8 @@ unsigned int speedstep_detect_processor (void)
switch (c->x86_model) {
case 0x0B: /* Intel PIII [Tualatin] */
/* cpuid_ebx(1) is 0x04 for desktop PIII, 0x06 for mobile PIII-M */
/* cpuid_ebx(1) is 0x04 for desktop PIII,
* 0x06 for mobile PIII-M */
ebx = cpuid_ebx(0x00000001);
dprintk("ebx is %x\n", ebx);
......@@ -313,14 +337,15 @@ unsigned int speedstep_detect_processor (void)
/* So far all PIII-M processors support SpeedStep. See
* Intel's 24540640.pdf of June 2003
*/
return SPEEDSTEP_PROCESSOR_PIII_T;
return SPEEDSTEP_CPU_PIII_T;
case 0x08: /* Intel PIII [Coppermine] */
/* all mobile PIII Coppermines have FSB 100 MHz
* ==> sort out a few desktop PIIIs. */
rdmsr(MSR_IA32_EBL_CR_POWERON, msr_lo, msr_hi);
dprintk("Coppermine: MSR_IA32_EBL_CR_POWERON is 0x%x, 0x%x\n", msr_lo, msr_hi);
dprintk("Coppermine: MSR_IA32_EBL_CR_POWERON is 0x%x, 0x%x\n",
msr_lo, msr_hi);
msr_lo &= 0x00c0000;
if (msr_lo != 0x0080000)
return 0;
......@@ -332,13 +357,15 @@ unsigned int speedstep_detect_processor (void)
* bit 56 or 57 is set
*/
rdmsr(MSR_IA32_PLATFORM_ID, msr_lo, msr_hi);
dprintk("Coppermine: MSR_IA32_PLATFORM ID is 0x%x, 0x%x\n", msr_lo, msr_hi);
if ((msr_hi & (1<<18)) && (relaxed_check ? 1 : (msr_hi & (3<<24)))) {
dprintk("Coppermine: MSR_IA32_PLATFORM ID is 0x%x, 0x%x\n",
msr_lo, msr_hi);
if ((msr_hi & (1<<18)) &&
(relaxed_check ? 1 : (msr_hi & (3<<24)))) {
if (c->x86_mask == 0x01) {
dprintk("early PIII version\n");
return SPEEDSTEP_PROCESSOR_PIII_C_EARLY;
return SPEEDSTEP_CPU_PIII_C_EARLY;
} else
return SPEEDSTEP_PROCESSOR_PIII_C;
return SPEEDSTEP_CPU_PIII_C;
}
default:
......@@ -369,7 +396,7 @@ unsigned int speedstep_get_freqs(unsigned int processor,
dprintk("trying to determine both speeds\n");
/* get current speed */
prev_speed = speedstep_get_processor_frequency(processor);
prev_speed = speedstep_get_frequency(processor);
if (!prev_speed)
return -EIO;
......@@ -379,7 +406,7 @@ unsigned int speedstep_get_freqs(unsigned int processor,
/* switch to low state */
set_state(SPEEDSTEP_LOW);
*low_speed = speedstep_get_processor_frequency(processor);
*low_speed = speedstep_get_frequency(processor);
if (!*low_speed) {
ret = -EIO;
goto out;
......@@ -398,7 +425,7 @@ unsigned int speedstep_get_freqs(unsigned int processor,
if (transition_latency)
do_gettimeofday(&tv2);
*high_speed = speedstep_get_processor_frequency(processor);
*high_speed = speedstep_get_frequency(processor);
if (!*high_speed) {
ret = -EIO;
goto out;
......@@ -426,9 +453,12 @@ unsigned int speedstep_get_freqs(unsigned int processor,
/* check if the latency measurement is too high or too low
* and set it to a safe value (500uSec) in that case
*/
if (*transition_latency > 10000000 || *transition_latency < 50000) {
printk (KERN_WARNING "speedstep: frequency transition measured seems out of "
"range (%u nSec), falling back to a safe one of %u nSec.\n",
if (*transition_latency > 10000000 ||
*transition_latency < 50000) {
printk(KERN_WARNING PFX "frequency transition "
"measured seems out of range (%u "
"nSec), falling back to a safe one of"
"%u nSec.\n",
*transition_latency, 500000);
*transition_latency = 500000;
}
......@@ -436,15 +466,16 @@ unsigned int speedstep_get_freqs(unsigned int processor,
out:
local_irq_restore(flags);
return (ret);
return ret;
}
EXPORT_SYMBOL_GPL(speedstep_get_freqs);
#ifdef CONFIG_X86_SPEEDSTEP_RELAXED_CAP_CHECK
module_param(relaxed_check, int, 0444);
MODULE_PARM_DESC(relaxed_check, "Don't do all checks for speedstep capability.");
MODULE_PARM_DESC(relaxed_check,
"Don't do all checks for speedstep capability.");
#endif
MODULE_AUTHOR ("Dominik Brodowski <linux@brodo.de>");
MODULE_DESCRIPTION ("Library for Intel SpeedStep 1 or 2 cpufreq drivers.");
MODULE_LICENSE ("GPL");
MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
MODULE_DESCRIPTION("Library for Intel SpeedStep 1 or 2 cpufreq drivers.");
MODULE_LICENSE("GPL");
arch/x86/kernel/cpu/cpufreq/speedstep-lib.h
浏览文件 @ ada19a31
......@@ -12,17 +12,17 @@
/* processors */
#define SPEEDSTEP_PROCESSOR_PIII_C_EARLY 0x00000001 /* Coppermine core */
#define SPEEDSTEP_PROCESSOR_PIII_C 0x00000002 /* Coppermine core */
#define SPEEDSTEP_PROCESSOR_PIII_T 0x00000003 /* Tualatin core */
#define SPEEDSTEP_PROCESSOR_P4M 0x00000004 /* P4-M */
#define SPEEDSTEP_CPU_PIII_C_EARLY 0x00000001 /* Coppermine core */
#define SPEEDSTEP_CPU_PIII_C 0x00000002 /* Coppermine core */
#define SPEEDSTEP_CPU_PIII_T 0x00000003 /* Tualatin core */
#define SPEEDSTEP_CPU_P4M 0x00000004 /* P4-M */
/* the following processors are not speedstep-capable and are not auto-detected
* in speedstep_detect_processor(). However, their speed can be detected using
* the speedstep_get_processor_frequency() call. */
#define SPEEDSTEP_PROCESSOR_PM 0xFFFFFF03 /* Pentium M */
#define SPEEDSTEP_PROCESSOR_P4D 0xFFFFFF04 /* desktop P4 */
#define SPEEDSTEP_PROCESSOR_PCORE 0xFFFFFF05 /* Core */
* the speedstep_get_frequency() call. */
#define SPEEDSTEP_CPU_PM 0xFFFFFF03 /* Pentium M */
#define SPEEDSTEP_CPU_P4D 0xFFFFFF04 /* desktop P4 */
#define SPEEDSTEP_CPU_PCORE 0xFFFFFF05 /* Core */
/* speedstep states -- only two of them */
......@@ -34,7 +34,7 @@
extern unsigned int speedstep_detect_processor (void);
/* detect the current speed (in khz) of the processor */
extern unsigned int speedstep_get_processor_frequency(unsigned int processor);
extern unsigned int speedstep_get_frequency(unsigned int processor);
/* detect the low and high speeds of the processor. The callback
......
arch/x86/kernel/cpu/cpufreq/speedstep-smi.c
浏览文件 @ ada19a31
......@@ -19,8 +19,8 @@
#include <linux/cpufreq.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <asm/ist.h>
#include <asm/io.h>
#include "speedstep-lib.h"
......@@ -30,12 +30,12 @@
* If user gives it, these are used.
*
*/
static int smi_port = 0;
static int smi_cmd = 0;
static unsigned int smi_sig = 0;
static int smi_port;
static int smi_cmd;
static unsigned int smi_sig;
/* info about the processor */
static unsigned int speedstep_processor = 0;
static unsigned int speedstep_processor;
/*
* There are only two frequency states for each processor. Values
......@@ -56,12 +56,13 @@ static struct cpufreq_frequency_table speedstep_freqs[] = {
* of DMA activity going on? */
#define SMI_TRIES 5
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "speedstep-smi", msg)
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
"speedstep-smi", msg)
/**
* speedstep_smi_ownership
*/
static int speedstep_smi_ownership (void)
static int speedstep_smi_ownership(void)
{
u32 command, result, magic, dummy;
u32 function = GET_SPEEDSTEP_OWNER;
......@@ -70,16 +71,18 @@ static int speedstep_smi_ownership (void)
command = (smi_sig & 0xffffff00) | (smi_cmd & 0xff);
magic = virt_to_phys(magic_data);
dprintk("trying to obtain ownership with command %x at port %x\n", command, smi_port);
dprintk("trying to obtain ownership with command %x at port %x\n",
command, smi_port);
__asm__ __volatile__(
"push %%ebp\n"
"out %%al, (%%dx)\n"
"pop %%ebp\n"
: "=D" (result), "=a" (dummy), "=b" (dummy), "=c" (dummy), "=d" (dummy),
"=S" (dummy)
: "=D" (result),
"=a" (dummy), "=b" (dummy), "=c" (dummy), "=d" (dummy),
"=S" (dummy)
: "a" (command), "b" (function), "c" (0), "d" (smi_port),
"D" (0), "S" (magic)
"D" (0), "S" (magic)
: "memory"
);
......@@ -97,10 +100,10 @@ static int speedstep_smi_ownership (void)
* even hangs [cf. bugme.osdl.org # 1422] on earlier systems. Empirical testing
* shows that the latter occurs if !(ist_info.event & 0xFFFF).
*/
static int speedstep_smi_get_freqs (unsigned int *low, unsigned int *high)
static int speedstep_smi_get_freqs(unsigned int *low, unsigned int *high)
{
u32 command, result = 0, edi, high_mhz, low_mhz, dummy;
u32 state=0;
u32 state = 0;
u32 function = GET_SPEEDSTEP_FREQS;
if (!(ist_info.event & 0xFFFF)) {
......@@ -110,17 +113,25 @@ static int speedstep_smi_get_freqs (unsigned int *low, unsigned int *high)
command = (smi_sig & 0xffffff00) | (smi_cmd & 0xff);
dprintk("trying to determine frequencies with command %x at port %x\n", command, smi_port);
dprintk("trying to determine frequencies with command %x at port %x\n",
command, smi_port);
__asm__ __volatile__(
"push %%ebp\n"
"out %%al, (%%dx)\n"
"pop %%ebp"
: "=a" (result), "=b" (high_mhz), "=c" (low_mhz), "=d" (state), "=D" (edi), "=S" (dummy)
: "a" (command), "b" (function), "c" (state), "d" (smi_port), "S" (0), "D" (0)
: "=a" (result),
"=b" (high_mhz),
"=c" (low_mhz),
"=d" (state), "=D" (edi), "=S" (dummy)
: "a" (command),
"b" (function),
"c" (state),
"d" (smi_port), "S" (0), "D" (0)
);
dprintk("result %x, low_freq %u, high_freq %u\n", result, low_mhz, high_mhz);
dprintk("result %x, low_freq %u, high_freq %u\n",
result, low_mhz, high_mhz);
/* abort if results are obviously incorrect... */
if ((high_mhz + low_mhz) < 600)
......@@ -137,26 +148,30 @@ static int speedstep_smi_get_freqs (unsigned int *low, unsigned int *high)
* @state: processor frequency state (SPEEDSTEP_LOW or SPEEDSTEP_HIGH)
*
*/
static int speedstep_get_state (void)
static int speedstep_get_state(void)
{
u32 function=GET_SPEEDSTEP_STATE;
u32 function = GET_SPEEDSTEP_STATE;
u32 result, state, edi, command, dummy;
command = (smi_sig & 0xffffff00) | (smi_cmd & 0xff);
dprintk("trying to determine current setting with command %x at port %x\n", command, smi_port);
dprintk("trying to determine current setting with command %x "
"at port %x\n", command, smi_port);
__asm__ __volatile__(
"push %%ebp\n"
"out %%al, (%%dx)\n"
"pop %%ebp\n"
: "=a" (result), "=b" (state), "=D" (edi), "=c" (dummy), "=d" (dummy), "=S" (dummy)
: "a" (command), "b" (function), "c" (0), "d" (smi_port), "S" (0), "D" (0)
: "=a" (result),
"=b" (state), "=D" (edi),
"=c" (dummy), "=d" (dummy), "=S" (dummy)
: "a" (command), "b" (function), "c" (0),
"d" (smi_port), "S" (0), "D" (0)
);
dprintk("state is %x, result is %x\n", state, result);
return (state & 1);
return state & 1;
}
......@@ -165,11 +180,11 @@ static int speedstep_get_state (void)
* @state: new processor frequency state (SPEEDSTEP_LOW or SPEEDSTEP_HIGH)
*
*/
static void speedstep_set_state (unsigned int state)
static void speedstep_set_state(unsigned int state)
{
unsigned int result = 0, command, new_state, dummy;
unsigned long flags;
unsigned int function=SET_SPEEDSTEP_STATE;
unsigned int function = SET_SPEEDSTEP_STATE;
unsigned int retry = 0;
if (state > 0x1)
......@@ -180,11 +195,14 @@ static void speedstep_set_state (unsigned int state)
command = (smi_sig & 0xffffff00) | (smi_cmd & 0xff);
dprintk("trying to set frequency to state %u with command %x at port %x\n", state, command, smi_port);
dprintk("trying to set frequency to state %u "
"with command %x at port %x\n",
state, command, smi_port);
do {
if (retry) {
dprintk("retry %u, previous result %u, waiting...\n", retry, result);
dprintk("retry %u, previous result %u, waiting...\n",
retry, result);
mdelay(retry * 50);
}
retry++;
......@@ -192,20 +210,26 @@ static void speedstep_set_state (unsigned int state)
"push %%ebp\n"
"out %%al, (%%dx)\n"
"pop %%ebp"
: "=b" (new_state), "=D" (result), "=c" (dummy), "=a" (dummy),
"=d" (dummy), "=S" (dummy)
: "a" (command), "b" (function), "c" (state), "d" (smi_port), "S" (0), "D" (0)
: "=b" (new_state), "=D" (result),
"=c" (dummy), "=a" (dummy),
"=d" (dummy), "=S" (dummy)
: "a" (command), "b" (function), "c" (state),
"d" (smi_port), "S" (0), "D" (0)
);
} while ((new_state != state) && (retry <= SMI_TRIES));
/* enable IRQs */
local_irq_restore(flags);
if (new_state == state) {
dprintk("change to %u MHz succeeded after %u tries with result %u\n", (speedstep_freqs[new_state].frequency / 1000), retry, result);
} else {
printk(KERN_ERR "cpufreq: change to state %u failed with new_state %u and result %u\n", state, new_state, result);
}
if (new_state == state)
dprintk("change to %u MHz succeeded after %u tries "
"with result %u\n",
(speedstep_freqs[new_state].frequency / 1000),
retry, result);
else
printk(KERN_ERR "cpufreq: change to state %u "
"failed with new_state %u and result %u\n",
state, new_state, result);
return;
}
......@@ -219,13 +243,14 @@ static void speedstep_set_state (unsigned int state)
*
* Sets a new CPUFreq policy/freq.
*/
static int speedstep_target (struct cpufreq_policy *policy,
static int speedstep_target(struct cpufreq_policy *policy,
unsigned int target_freq, unsigned int relation)
{
unsigned int newstate = 0;
struct cpufreq_freqs freqs;
if (cpufreq_frequency_table_target(policy, &speedstep_freqs[0], target_freq, relation, &newstate))
if (cpufreq_frequency_table_target(policy, &speedstep_freqs[0],
target_freq, relation, &newstate))
return -EINVAL;
freqs.old = speedstep_freqs[speedstep_get_state()].frequency;
......@@ -250,7 +275,7 @@ static int speedstep_target (struct cpufreq_policy *policy,
* Limit must be within speedstep_low_freq and speedstep_high_freq, with
* at least one border included.
*/
static int speedstep_verify (struct cpufreq_policy *policy)
static int speedstep_verify(struct cpufreq_policy *policy)
{
return cpufreq_frequency_table_verify(policy, &speedstep_freqs[0]);
}
......@@ -259,7 +284,8 @@ static int speedstep_verify (struct cpufreq_policy *policy)
static int speedstep_cpu_init(struct cpufreq_policy *policy)
{
int result;
unsigned int speed,state;
unsigned int speed, state;
unsigned int *low, *high;
/* capability check */
if (policy->cpu != 0)
......@@ -272,19 +298,23 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
}
/* detect low and high frequency */
result = speedstep_smi_get_freqs(&speedstep_freqs[SPEEDSTEP_LOW].frequency,
&speedstep_freqs[SPEEDSTEP_HIGH].frequency);
low = &speedstep_freqs[SPEEDSTEP_LOW].frequency;
high = &speedstep_freqs[SPEEDSTEP_HIGH].frequency;
result = speedstep_smi_get_freqs(low, high);
if (result) {
/* fall back to speedstep_lib.c dection mechanism: try both states out */
dprintk("could not detect low and high frequencies by SMI call.\n");
/* fall back to speedstep_lib.c dection mechanism:
* try both states out */
dprintk("could not detect low and high frequencies "
"by SMI call.\n");
result = speedstep_get_freqs(speedstep_processor,
&speedstep_freqs[SPEEDSTEP_LOW].frequency,
&speedstep_freqs[SPEEDSTEP_HIGH].frequency,
low, high,
NULL,
&speedstep_set_state);
if (result) {
dprintk("could not detect two different speeds -- aborting.\n");
dprintk("could not detect two different speeds"
" -- aborting.\n");
return result;
} else
dprintk("workaround worked.\n");
......@@ -295,7 +325,8 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
speed = speedstep_freqs[state].frequency;
dprintk("currently at %s speed setting - %i MHz\n",
(speed == speedstep_freqs[SPEEDSTEP_LOW].frequency) ? "low" : "high",
(speed == speedstep_freqs[SPEEDSTEP_LOW].frequency)
? "low" : "high",
(speed / 1000));
/* cpuinfo and default policy values */
......@@ -304,7 +335,7 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
result = cpufreq_frequency_table_cpuinfo(policy, speedstep_freqs);
if (result)
return (result);
return result;
cpufreq_frequency_table_get_attr(speedstep_freqs, policy->cpu);
......@@ -321,7 +352,7 @@ static unsigned int speedstep_get(unsigned int cpu)
{
if (cpu)
return -ENODEV;
return speedstep_get_processor_frequency(speedstep_processor);
return speedstep_get_frequency(speedstep_processor);
}
......@@ -335,7 +366,7 @@ static int speedstep_resume(struct cpufreq_policy *policy)
return result;
}
static struct freq_attr* speedstep_attr[] = {
static struct freq_attr *speedstep_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
NULL,
};
......@@ -364,21 +395,23 @@ static int __init speedstep_init(void)
speedstep_processor = speedstep_detect_processor();
switch (speedstep_processor) {
case SPEEDSTEP_PROCESSOR_PIII_T:
case SPEEDSTEP_PROCESSOR_PIII_C:
case SPEEDSTEP_PROCESSOR_PIII_C_EARLY:
case SPEEDSTEP_CPU_PIII_T:
case SPEEDSTEP_CPU_PIII_C:
case SPEEDSTEP_CPU_PIII_C_EARLY:
break;
default:
speedstep_processor = 0;
}
if (!speedstep_processor) {
dprintk ("No supported Intel CPU detected.\n");
dprintk("No supported Intel CPU detected.\n");
return -ENODEV;
}
dprintk("signature:0x%.8lx, command:0x%.8lx, event:0x%.8lx, perf_level:0x%.8lx.\n",
ist_info.signature, ist_info.command, ist_info.event, ist_info.perf_level);
dprintk("signature:0x%.8lx, command:0x%.8lx, "
"event:0x%.8lx, perf_level:0x%.8lx.\n",
ist_info.signature, ist_info.command,
ist_info.event, ist_info.perf_level);
/* Error if no IST-SMI BIOS or no PARM
sig= 'ISGE' aka 'Intel Speedstep Gate E' */
......@@ -416,17 +449,20 @@ static void __exit speedstep_exit(void)
cpufreq_unregister_driver(&speedstep_driver);
}
module_param(smi_port, int, 0444);
module_param(smi_cmd, int, 0444);
module_param(smi_sig, uint, 0444);
module_param(smi_port, int, 0444);
module_param(smi_cmd, int, 0444);
module_param(smi_sig, uint, 0444);
MODULE_PARM_DESC(smi_port, "Override the BIOS-given IST port with this value -- Intel's default setting is 0xb2");
MODULE_PARM_DESC(smi_cmd, "Override the BIOS-given IST command with this value -- Intel's default setting is 0x82");
MODULE_PARM_DESC(smi_sig, "Set to 1 to fake the IST signature when using the SMI interface.");
MODULE_PARM_DESC(smi_port, "Override the BIOS-given IST port with this value "
"-- Intel's default setting is 0xb2");
MODULE_PARM_DESC(smi_cmd, "Override the BIOS-given IST command with this value "
"-- Intel's default setting is 0x82");
MODULE_PARM_DESC(smi_sig, "Set to 1 to fake the IST signature when using the "
"SMI interface.");
MODULE_AUTHOR ("Hiroshi Miura");
MODULE_DESCRIPTION ("Speedstep driver for IST applet SMI interface.");
MODULE_LICENSE ("GPL");
MODULE_AUTHOR("Hiroshi Miura");
MODULE_DESCRIPTION("Speedstep driver for IST applet SMI interface.");
MODULE_LICENSE("GPL");
module_init(speedstep_init);
module_exit(speedstep_exit);
arch/x86/kernel/tsc.c
浏览文件 @ ada19a31
......@@ -543,8 +543,6 @@ unsigned long native_calibrate_tsc(void)
return tsc_pit_min;
}
#ifdef CONFIG_X86_32
/* Only called from the Powernow K7 cpu freq driver */
int recalibrate_cpu_khz(void)
{
#ifndef CONFIG_SMP
......@@ -566,7 +564,6 @@ int recalibrate_cpu_khz(void)
EXPORT_SYMBOL(recalibrate_cpu_khz);
#endif /* CONFIG_X86_32 */
/* Accelerators for sched_clock()
* convert from cycles(64bits) => nanoseconds (64bits)
......
drivers/cpufreq/cpufreq.c
浏览文件 @ ada19a31
......@@ -104,7 +104,8 @@ EXPORT_SYMBOL_GPL(unlock_policy_rwsem_write);
/* internal prototypes */
static int __cpufreq_governor(struct cpufreq_policy *policy, unsigned int event);
static int __cpufreq_governor(struct cpufreq_policy *policy,
unsigned int event);
static unsigned int __cpufreq_get(unsigned int cpu);
static void handle_update(struct work_struct *work);
......@@ -128,7 +129,7 @@ static int __init init_cpufreq_transition_notifier_list(void)
pure_initcall(init_cpufreq_transition_notifier_list);
static LIST_HEAD(cpufreq_governor_list);
static DEFINE_MUTEX (cpufreq_governor_mutex);
static DEFINE_MUTEX(cpufreq_governor_mutex);
struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
{
......@@ -371,7 +372,7 @@ static struct cpufreq_governor *__find_governor(const char *str_governor)
struct cpufreq_governor *t;
list_for_each_entry(t, &cpufreq_governor_list, governor_list)
if (!strnicmp(str_governor,t->name,CPUFREQ_NAME_LEN))
if (!strnicmp(str_governor, t->name, CPUFREQ_NAME_LEN))
return t;
return NULL;
......@@ -429,15 +430,11 @@ static int cpufreq_parse_governor(char *str_governor, unsigned int *policy,
mutex_unlock(&cpufreq_governor_mutex);
}
out:
out:
return err;
}
/* drivers/base/cpu.c */
extern struct sysdev_class cpu_sysdev_class;
/**
* cpufreq_per_cpu_attr_read() / show_##file_name() -
* print out cpufreq information
......@@ -450,11 +447,12 @@ extern struct sysdev_class cpu_sysdev_class;
static ssize_t show_##file_name \
(struct cpufreq_policy *policy, char *buf) \
{ \
return sprintf (buf, "%u\n", policy->object); \
return sprintf(buf, "%u\n", policy->object); \
}
show_one(cpuinfo_min_freq, cpuinfo.min_freq);
show_one(cpuinfo_max_freq, cpuinfo.max_freq);
show_one(cpuinfo_transition_latency, cpuinfo.transition_latency);
show_one(scaling_min_freq, min);
show_one(scaling_max_freq, max);
show_one(scaling_cur_freq, cur);
......@@ -476,7 +474,7 @@ static ssize_t store_##file_name \
if (ret) \
return -EINVAL; \
\
ret = sscanf (buf, "%u", &new_policy.object); \
ret = sscanf(buf, "%u", &new_policy.object); \
if (ret != 1) \
return -EINVAL; \
\
......@@ -486,8 +484,8 @@ static ssize_t store_##file_name \
return ret ? ret : count; \
}
store_one(scaling_min_freq,min);
store_one(scaling_max_freq,max);
store_one(scaling_min_freq, min);
store_one(scaling_max_freq, max);
/**
* show_cpuinfo_cur_freq - current CPU frequency as detected by hardware
......@@ -507,12 +505,13 @@ static ssize_t show_cpuinfo_cur_freq(struct cpufreq_policy *policy,
*/
static ssize_t show_scaling_governor(struct cpufreq_policy *policy, char *buf)
{
if(policy->policy == CPUFREQ_POLICY_POWERSAVE)
if (policy->policy == CPUFREQ_POLICY_POWERSAVE)
return sprintf(buf, "powersave\n");
else if (policy->policy == CPUFREQ_POLICY_PERFORMANCE)
return sprintf(buf, "performance\n");
else if (policy->governor)
return scnprintf(buf, CPUFREQ_NAME_LEN, "%s\n", policy->governor->name);
return scnprintf(buf, CPUFREQ_NAME_LEN, "%s\n",
policy->governor->name);
return -EINVAL;
}
......@@ -531,7 +530,7 @@ static ssize_t store_scaling_governor(struct cpufreq_policy *policy,
if (ret)
return ret;
ret = sscanf (buf, "%15s", str_governor);
ret = sscanf(buf, "%15s", str_governor);
if (ret != 1)
return -EINVAL;
......@@ -575,7 +574,8 @@ static ssize_t show_scaling_available_governors(struct cpufreq_policy *policy,
}
list_for_each_entry(t, &cpufreq_governor_list, governor_list) {
if (i >= (ssize_t) ((PAGE_SIZE / sizeof(char)) - (CPUFREQ_NAME_LEN + 2)))
if (i >= (ssize_t) ((PAGE_SIZE / sizeof(char))
- (CPUFREQ_NAME_LEN + 2)))
goto out;
i += scnprintf(&buf[i], CPUFREQ_NAME_LEN, "%s ", t->name);
}
......@@ -594,7 +594,7 @@ static ssize_t show_cpus(const struct cpumask *mask, char *buf)
i += scnprintf(&buf[i], (PAGE_SIZE - i - 2), " ");
i += scnprintf(&buf[i], (PAGE_SIZE - i - 2), "%u", cpu);
if (i >= (PAGE_SIZE - 5))
break;
break;
}
i += sprintf(&buf[i], "\n");
return i;
......@@ -660,6 +660,7 @@ __ATTR(_name, 0644, show_##_name, store_##_name)
define_one_ro0400(cpuinfo_cur_freq);
define_one_ro(cpuinfo_min_freq);
define_one_ro(cpuinfo_max_freq);
define_one_ro(cpuinfo_transition_latency);
define_one_ro(scaling_available_governors);
define_one_ro(scaling_driver);
define_one_ro(scaling_cur_freq);
......@@ -673,6 +674,7 @@ define_one_rw(scaling_setspeed);
static struct attribute *default_attrs[] = {
&cpuinfo_min_freq.attr,
&cpuinfo_max_freq.attr,
&cpuinfo_transition_latency.attr,
&scaling_min_freq.attr,
&scaling_max_freq.attr,
&affected_cpus.attr,
......@@ -684,10 +686,10 @@ static struct attribute *default_attrs[] = {
NULL
};
#define to_policy(k) container_of(k,struct cpufreq_policy,kobj)
#define to_attr(a) container_of(a,struct freq_attr,attr)
#define to_policy(k) container_of(k, struct cpufreq_policy, kobj)
#define to_attr(a) container_of(a, struct freq_attr, attr)
static ssize_t show(struct kobject *kobj, struct attribute *attr ,char *buf)
static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf)
{
struct cpufreq_policy *policy = to_policy(kobj);
struct freq_attr *fattr = to_attr(attr);
......@@ -853,10 +855,10 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
if (cpu == j)
continue;
/* check for existing affected CPUs. They may not be aware
* of it due to CPU Hotplug.
/* Check for existing affected CPUs.
* They may not be aware of it due to CPU Hotplug.
*/
managed_policy = cpufreq_cpu_get(j); // FIXME: Where is this released? What about error paths?
managed_policy = cpufreq_cpu_get(j); /* FIXME: Where is this released? What about error paths? */
if (unlikely(managed_policy)) {
/* Set proper policy_cpu */
......@@ -1127,8 +1129,8 @@ static void handle_update(struct work_struct *work)
* @old_freq: CPU frequency the kernel thinks the CPU runs at
* @new_freq: CPU frequency the CPU actually runs at
*
* We adjust to current frequency first, and need to clean up later. So either call
* to cpufreq_update_policy() or schedule handle_update()).
* We adjust to current frequency first, and need to clean up later.
* So either call to cpufreq_update_policy() or schedule handle_update()).
*/
static void cpufreq_out_of_sync(unsigned int cpu, unsigned int old_freq,
unsigned int new_freq)
......@@ -1610,7 +1612,8 @@ EXPORT_SYMBOL_GPL(cpufreq_unregister_governor);
/**
* cpufreq_get_policy - get the current cpufreq_policy
* @policy: struct cpufreq_policy into which the current cpufreq_policy is written
* @policy: struct cpufreq_policy into which the current cpufreq_policy
* is written
*
* Reads the current cpufreq policy.
*/
......
drivers/cpufreq/cpufreq_ondemand.c
浏览文件 @ ada19a31
此差异已折叠。
drivers/cpufreq/cpufreq_stats.c
浏览文件 @ ada19a31
此差异已折叠。
drivers/cpufreq/cpufreq_userspace.c
浏览文件 @ ada19a31
......@@ -24,9 +24,6 @@
#include <linux/sysfs.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
/**
* A few values needed by the userspace governor
*/
......@@ -37,7 +34,7 @@ static DEFINE_PER_CPU(unsigned int, cpu_set_freq); /* CPU freq desired by
userspace */
static DEFINE_PER_CPU(unsigned int, cpu_is_managed);
static DEFINE_MUTEX (userspace_mutex);
static DEFINE_MUTEX(userspace_mutex);
static int cpus_using_userspace_governor;
#define dprintk(msg...) \
......@@ -46,9 +43,9 @@ static int cpus_using_userspace_governor;
/* keep track of frequency transitions */
static int
userspace_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
void *data)
void *data)
{
struct cpufreq_freqs *freq = data;
struct cpufreq_freqs *freq = data;
if (!per_cpu(cpu_is_managed, freq->cpu))
return 0;
......@@ -57,11 +54,11 @@ userspace_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
freq->cpu, freq->new);
per_cpu(cpu_cur_freq, freq->cpu) = freq->new;
return 0;
return 0;
}
static struct notifier_block userspace_cpufreq_notifier_block = {
.notifier_call = userspace_cpufreq_notifier
.notifier_call = userspace_cpufreq_notifier
};
......@@ -93,8 +90,11 @@ static int cpufreq_set(struct cpufreq_policy *policy, unsigned int freq)
* We're safe from concurrent calls to ->target() here
* as we hold the userspace_mutex lock. If we were calling
* cpufreq_driver_target, a deadlock situation might occur:
* A: cpufreq_set (lock userspace_mutex) -> cpufreq_driver_target(lock policy->lock)
* B: cpufreq_set_policy(lock policy->lock) -> __cpufreq_governor -> cpufreq_governor_userspace (lock userspace_mutex)
* A: cpufreq_set (lock userspace_mutex) ->
* cpufreq_driver_target(lock policy->lock)
* B: cpufreq_set_policy(lock policy->lock) ->
* __cpufreq_governor ->
* cpufreq_governor_userspace (lock userspace_mutex)
*/
ret = __cpufreq_driver_target(policy, freq, CPUFREQ_RELATION_L);
......@@ -210,9 +210,10 @@ static void __exit cpufreq_gov_userspace_exit(void)
}
MODULE_AUTHOR ("Dominik Brodowski <linux@brodo.de>, Russell King <rmk@arm.linux.org.uk>");
MODULE_DESCRIPTION ("CPUfreq policy governor 'userspace'");
MODULE_LICENSE ("GPL");
MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>, "
"Russell King <rmk@arm.linux.org.uk>");
MODULE_DESCRIPTION("CPUfreq policy governor 'userspace'");
MODULE_LICENSE("GPL");
#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE
fs_initcall(cpufreq_gov_userspace_init);
......
drivers/cpufreq/freq_table.c
浏览文件 @ ada19a31
......@@ -28,7 +28,7 @@ int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
unsigned int max_freq = 0;
unsigned int i;
for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
unsigned int freq = table[i].frequency;
if (freq == CPUFREQ_ENTRY_INVALID) {
dprintk("table entry %u is invalid, skipping\n", i);
......@@ -70,7 +70,7 @@ int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
policy->cpuinfo.max_freq);
for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
unsigned int freq = table[i].frequency;
if (freq == CPUFREQ_ENTRY_INVALID)
continue;
......@@ -125,13 +125,13 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
if (!cpu_online(policy->cpu))
return -EINVAL;
for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
unsigned int freq = table[i].frequency;
if (freq == CPUFREQ_ENTRY_INVALID)
continue;
if ((freq < policy->min) || (freq > policy->max))
continue;
switch(relation) {
switch (relation) {
case CPUFREQ_RELATION_H:
if (freq <= target_freq) {
if (freq >= optimal.frequency) {
......@@ -178,7 +178,7 @@ static DEFINE_PER_CPU(struct cpufreq_frequency_table *, show_table);
/**
* show_available_freqs - show available frequencies for the specified CPU
*/
static ssize_t show_available_freqs (struct cpufreq_policy *policy, char *buf)
static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf)
{
unsigned int i = 0;
unsigned int cpu = policy->cpu;
......@@ -190,7 +190,7 @@ static ssize_t show_available_freqs (struct cpufreq_policy *policy, char *buf)
table = per_cpu(show_table, cpu);
for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
continue;
count += sprintf(&buf[count], "%d ", table[i].frequency);
......@@ -234,6 +234,6 @@ struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu)
}
EXPORT_SYMBOL_GPL(cpufreq_frequency_get_table);
MODULE_AUTHOR ("Dominik Brodowski <linux@brodo.de>");
MODULE_DESCRIPTION ("CPUfreq frequency table helpers");
MODULE_LICENSE ("GPL");
MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
MODULE_DESCRIPTION("CPUfreq frequency table helpers");
MODULE_LICENSE("GPL");
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