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kernel_linux
提交 c55377ee 编写于 作者: P Paul Mackerras
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powerpc: Move a bunch of ppc64 headers to include/asm-powerpc 

... and also delete some that are no longer used because we already
had an include/asm-powerpc version of the header.
Signed-off-by: NPaul Mackerras <paulus@samba.org>
上级 821077b2
隐藏空白更改
内联 并排
Showing with 42 addition and 640 deletion
include/asm-ppc64/delay.h → include/asm-powerpc/delay.h
浏览文件 @ c55377ee
#ifndef _PPC64_DELAY_H
#define _PPC64_DELAY_H
#ifndef _ASM_POWERPC_DELAY_H
#define _ASM_POWERPC_DELAY_H
/*
* Copyright 1996, Paul Mackerras.
......@@ -15,10 +15,17 @@
extern unsigned long tb_ticks_per_usec;
/* define these here to prevent circular dependencies */
#ifdef CONFIG_PPC64
/* define these here to prevent circular dependencies */
/* these instructions control the thread priority on multi-threaded cpus */
#define __HMT_low() asm volatile("or 1,1,1")
#define __HMT_medium() asm volatile("or 2,2,2")
#define __barrier() asm volatile("":::"memory")
#else
#define __HMT_low()
#define __HMT_medium()
#endif
#define __barrier() asm volatile("" ::: "memory")
static inline unsigned long __get_tb(void)
{
......@@ -32,7 +39,7 @@ static inline void __delay(unsigned long loops)
{
unsigned long start = __get_tb();
while((__get_tb()-start) < loops)
while((__get_tb() - start) < loops)
__HMT_low();
__HMT_medium();
__barrier();
......@@ -45,4 +52,4 @@ static inline void udelay(unsigned long usecs)
__delay(loops);
}
#endif /* _PPC64_DELAY_H */
#endif /* _ASM_POWERPC_DELAY_H */
include/asm-ppc64/floppy.h → include/asm-powerpc/floppy.h
浏览文件 @ c55377ee
......@@ -7,22 +7,22 @@
*
* Copyright (C) 1995
*/
#ifndef __ASM_PPC64_FLOPPY_H
#define __ASM_PPC64_FLOPPY_H
#ifndef __ASM_POWERPC_FLOPPY_H
#define __ASM_POWERPC_FLOPPY_H
#include <linux/config.h>
#include <asm/machdep.h>
#define fd_inb(port) inb_p(port)
#define fd_outb(value,port) outb_p(value,port)
#define fd_inb(port) inb_p(port)
#define fd_outb(value,port) outb_p(value,port)
#define fd_enable_dma() enable_dma(FLOPPY_DMA)
#define fd_disable_dma() disable_dma(FLOPPY_DMA)
#define fd_request_dma() request_dma(FLOPPY_DMA,"floppy")
#define fd_request_dma() request_dma(FLOPPY_DMA, "floppy")
#define fd_free_dma() free_dma(FLOPPY_DMA)
#define fd_clear_dma_ff() clear_dma_ff(FLOPPY_DMA)
#define fd_set_dma_mode(mode) set_dma_mode(FLOPPY_DMA,mode)
#define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA,count)
#define fd_set_dma_mode(mode) set_dma_mode(FLOPPY_DMA, mode)
#define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA, count)
#define fd_enable_irq() enable_irq(FLOPPY_IRQ)
#define fd_disable_irq() disable_irq(FLOPPY_IRQ)
#define fd_cacheflush(addr,size) /* nothing */
......@@ -35,10 +35,10 @@
#include <linux/pci.h>
#define fd_dma_setup(addr,size,mode,io) ppc64_fd_dma_setup(addr,size,mode,io)
#define fd_dma_setup(addr,size,mode,io) powerpc_fd_dma_setup(addr,size,mode,io)
static __inline__ int
ppc64_fd_dma_setup(char *addr, unsigned long size, int mode, int io)
static __inline__ int powerpc_fd_dma_setup(char *addr, unsigned long size,
int mode, int io)
{
static unsigned long prev_size;
static dma_addr_t bus_addr = 0;
......@@ -55,9 +55,8 @@ ppc64_fd_dma_setup(char *addr, unsigned long size, int mode, int io)
bus_addr = 0;
}
if (!bus_addr) /* need to map it */ {
if (!bus_addr) /* need to map it */
bus_addr = pci_map_single(NULL, addr, size, dir);
}
/* remember this one as prev */
prev_addr = addr;
......@@ -103,4 +102,4 @@ static int FDC2 = -1;
#define EXTRA_FLOPPY_PARAMS
#endif /* __ASM_PPC64_FLOPPY_H */
#endif /* __ASM_POWERPC_FLOPPY_H */
include/asm-ppc64/nvram.h → include/asm-powerpc/nvram.h
浏览文件 @ c55377ee
/*
* PreP compliant NVRAM access
* This needs to be updated for PPC64
* NVRAM definitions and access functions.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
......@@ -8,8 +7,8 @@
* 2 of the License, or (at your option) any later version.
*/
#ifndef _PPC64_NVRAM_H
#define _PPC64_NVRAM_H
#ifndef _ASM_POWERPC_NVRAM_H
#define _ASM_POWERPC_NVRAM_H
#define NVRW_CNT 0x20
#define NVRAM_HEADER_LEN 16 /* sizeof(struct nvram_header) */
......@@ -88,7 +87,11 @@ extern u8 pmac_xpram_read(int xpaddr);
extern void pmac_xpram_write(int xpaddr, u8 data);
/* Synchronize NVRAM */
extern int nvram_sync(void);
extern void nvram_sync(void);
/* Normal access to NVRAM */
extern unsigned char nvram_read_byte(int i);
extern void nvram_write_byte(unsigned char c, int i);
/* Some offsets in XPRAM */
#define PMAC_XPRAM_MACHINE_LOC 0xe4
......@@ -112,5 +115,6 @@ struct pmac_machine_location {
_IOWR('p', 0x40, int)
#define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */
#define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */
#endif /* _PPC64_NVRAM_H */
#endif /* _ASM_POWERPC_NVRAM_H */
include/asm-ppc64/serial.h → include/asm-powerpc/serial.h
浏览文件 @ c55377ee
/*
* include/asm-ppc64/serial.h
*/
#ifndef _PPC64_SERIAL_H
#define _PPC64_SERIAL_H
/*
* This assumes you have a 1.8432 MHz clock for your UART.
*
* It'd be nice if someone built a serial card with a 24.576 MHz
* clock, since the 16550A is capable of handling a top speed of 1.5
* megabits/second; but this requires the faster clock.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _ASM_POWERPC_SERIAL_H
#define _ASM_POWERPC_SERIAL_H
/*
* Serial ports are not listed here, because they are discovered
* through the device tree.
*/
/* Default baud base if not found in device-tree */
#define BASE_BAUD ( 1843200 / 16 )
......
include/asm-ppc/nvram.h 已删除 100644 → 0
浏览文件 @ 821077b2
/*
* PreP compliant NVRAM access
*/
#ifdef __KERNEL__
#ifndef _PPC_NVRAM_H
#define _PPC_NVRAM_H
#define NVRAM_AS0 0x74
#define NVRAM_AS1 0x75
#define NVRAM_DATA 0x77
/* RTC Offsets */
#define MOTO_RTC_SECONDS 0x1FF9
#define MOTO_RTC_MINUTES 0x1FFA
#define MOTO_RTC_HOURS 0x1FFB
#define MOTO_RTC_DAY_OF_WEEK 0x1FFC
#define MOTO_RTC_DAY_OF_MONTH 0x1FFD
#define MOTO_RTC_MONTH 0x1FFE
#define MOTO_RTC_YEAR 0x1FFF
#define MOTO_RTC_CONTROLA 0x1FF8
#define MOTO_RTC_CONTROLB 0x1FF9
/* PowerMac specific nvram stuffs */
enum {
pmac_nvram_OF, /* Open Firmware partition */
pmac_nvram_XPRAM, /* MacOS XPRAM partition */
pmac_nvram_NR /* MacOS Name Registry partition */
};
/* Return partition offset in nvram */
extern int pmac_get_partition(int partition);
/* Direct access to XPRAM on PowerMacs */
extern u8 pmac_xpram_read(int xpaddr);
extern void pmac_xpram_write(int xpaddr, u8 data);
/* Synchronize NVRAM */
extern void nvram_sync(void);
/* Normal access to NVRAM */
extern unsigned char nvram_read_byte(int i);
extern void nvram_write_byte(unsigned char c, int i);
/* Some offsets in XPRAM */
#define PMAC_XPRAM_MACHINE_LOC 0xe4
#define PMAC_XPRAM_SOUND_VOLUME 0x08
/* Machine location structure in PowerMac XPRAM */
struct pmac_machine_location {
unsigned int latitude; /* 2+30 bit Fractional number */
unsigned int longitude; /* 2+30 bit Fractional number */
unsigned int delta; /* mix of GMT delta and DLS */
};
/*
* /dev/nvram ioctls
*
* Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
* definitely obsolete. Do not use it if you can avoid it
*/
#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
_IOWR('p', 0x40, int)
#define IOC_NVRAM_GET_OFFSET _IOWR('p', 0x42, int) /* Get NVRAM partition offset */
#define IOC_NVRAM_SYNC _IO('p', 0x43) /* Sync NVRAM image */
#endif
#endif /* __KERNEL__ */
include/asm-ppc64/prom.h 已删除 100644 → 0
浏览文件 @ 821077b2
#ifndef _PPC64_PROM_H
#define _PPC64_PROM_H
/*
* Definitions for talking to the Open Firmware PROM on
* Power Macintosh computers.
*
* Copyright (C) 1996 Paul Mackerras.
*
* Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/config.h>
#include <linux/proc_fs.h>
#include <asm/atomic.h>
#define PTRRELOC(x) ((typeof(x))((unsigned long)(x) - offset))
#define PTRUNRELOC(x) ((typeof(x))((unsigned long)(x) + offset))
#define RELOC(x) (*PTRRELOC(&(x)))
/* Definitions used by the flattened device tree */
#define OF_DT_HEADER 0xd00dfeed /* marker */
#define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */
#define OF_DT_END_NODE 0x2 /* End node */
#define OF_DT_PROP 0x3 /* Property: name off, size,
* content */
#define OF_DT_NOP 0x4 /* nop */
#define OF_DT_END 0x9
#define OF_DT_VERSION 0x10
/*
* This is what gets passed to the kernel by prom_init or kexec
*
* The dt struct contains the device tree structure, full pathes and
* property contents. The dt strings contain a separate block with just
* the strings for the property names, and is fully page aligned and
* self contained in a page, so that it can be kept around by the kernel,
* each property name appears only once in this page (cheap compression)
*
* the mem_rsvmap contains a map of reserved ranges of physical memory,
* passing it here instead of in the device-tree itself greatly simplifies
* the job of everybody. It's just a list of u64 pairs (base/size) that
* ends when size is 0
*/
struct boot_param_header
{
u32 magic; /* magic word OF_DT_HEADER */
u32 totalsize; /* total size of DT block */
u32 off_dt_struct; /* offset to structure */
u32 off_dt_strings; /* offset to strings */
u32 off_mem_rsvmap; /* offset to memory reserve map */
u32 version; /* format version */
u32 last_comp_version; /* last compatible version */
/* version 2 fields below */
u32 boot_cpuid_phys; /* Physical CPU id we're booting on */
/* version 3 fields below */
u32 dt_strings_size; /* size of the DT strings block */
};
typedef u32 phandle;
typedef u32 ihandle;
struct address_range {
unsigned long space;
unsigned long address;
unsigned long size;
};
struct interrupt_info {
int line;
int sense; /* +ve/-ve logic, edge or level, etc. */
};
struct pci_address {
u32 a_hi;
u32 a_mid;
u32 a_lo;
};
struct isa_address {
u32 a_hi;
u32 a_lo;
};
struct isa_range {
struct isa_address isa_addr;
struct pci_address pci_addr;
unsigned int size;
};
struct reg_property {
unsigned long address;
unsigned long size;
};
struct reg_property32 {
unsigned int address;
unsigned int size;
};
struct reg_property64 {
unsigned long address;
unsigned long size;
};
struct property {
char *name;
int length;
unsigned char *value;
struct property *next;
};
struct device_node {
char *name;
char *type;
phandle node;
phandle linux_phandle;
int n_addrs;
struct address_range *addrs;
int n_intrs;
struct interrupt_info *intrs;
char *full_name;
struct property *properties;
struct device_node *parent;
struct device_node *child;
struct device_node *sibling;
struct device_node *next; /* next device of same type */
struct device_node *allnext; /* next in list of all nodes */
struct proc_dir_entry *pde; /* this node's proc directory */
struct kref kref;
unsigned long _flags;
void *data;
#ifdef CONFIG_PPC_ISERIES
struct list_head Device_List;
#endif
};
extern struct device_node *of_chosen;
/* flag descriptions */
#define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
/*
* Until 32-bit ppc can add proc_dir_entries to its device_node
* definition, we cannot refer to pde, name_link, and addr_link
* in arch-independent code.
*/
#define HAVE_ARCH_DEVTREE_FIXUPS
static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de)
{
dn->pde = de;
}
/* OBSOLETE: Old stlye node lookup */
extern struct device_node *find_devices(const char *name);
extern struct device_node *find_type_devices(const char *type);
extern struct device_node *find_path_device(const char *path);
extern struct device_node *find_compatible_devices(const char *type,
const char *compat);
extern struct device_node *find_all_nodes(void);
/* New style node lookup */
extern struct device_node *of_find_node_by_name(struct device_node *from,
const char *name);
extern struct device_node *of_find_node_by_type(struct device_node *from,
const char *type);
extern struct device_node *of_find_compatible_node(struct device_node *from,
const char *type, const char *compat);
extern struct device_node *of_find_node_by_path(const char *path);
extern struct device_node *of_find_node_by_phandle(phandle handle);
extern struct device_node *of_find_all_nodes(struct device_node *prev);
extern struct device_node *of_get_parent(const struct device_node *node);
extern struct device_node *of_get_next_child(const struct device_node *node,
struct device_node *prev);
extern struct device_node *of_node_get(struct device_node *node);
extern void of_node_put(struct device_node *node);
/* For scanning the flat device-tree at boot time */
int __init of_scan_flat_dt(int (*it)(unsigned long node,
const char *uname, int depth,
void *data),
void *data);
void* __init of_get_flat_dt_prop(unsigned long node, const char *name,
unsigned long *size);
/* For updating the device tree at runtime */
extern void of_attach_node(struct device_node *);
extern void of_detach_node(const struct device_node *);
/* Other Prototypes */
extern unsigned long prom_init(unsigned long, unsigned long, unsigned long,
unsigned long, unsigned long);
extern void finish_device_tree(void);
extern void unflatten_device_tree(void);
extern void early_init_devtree(void *);
extern int device_is_compatible(struct device_node *device, const char *);
extern int machine_is_compatible(const char *compat);
extern unsigned char *get_property(struct device_node *node, const char *name,
int *lenp);
extern void print_properties(struct device_node *node);
extern int prom_n_addr_cells(struct device_node* np);
extern int prom_n_size_cells(struct device_node* np);
extern int prom_n_intr_cells(struct device_node* np);
extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
extern int prom_add_property(struct device_node* np, struct property* prop);
#endif /* _PPC64_PROM_H */
include/asm-ppc64/system.h 已删除 100644 → 0
浏览文件 @ 821077b2
#ifndef __PPC64_SYSTEM_H
#define __PPC64_SYSTEM_H
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/config.h>
#include <linux/compiler.h>
#include <asm/page.h>
#include <asm/processor.h>
#include <asm/hw_irq.h>
#include <asm/synch.h>
/*
* Memory barrier.
* The sync instruction guarantees that all memory accesses initiated
* by this processor have been performed (with respect to all other
* mechanisms that access memory). The eieio instruction is a barrier
* providing an ordering (separately) for (a) cacheable stores and (b)
* loads and stores to non-cacheable memory (e.g. I/O devices).
*
* mb() prevents loads and stores being reordered across this point.
* rmb() prevents loads being reordered across this point.
* wmb() prevents stores being reordered across this point.
* read_barrier_depends() prevents data-dependent loads being reordered
* across this point (nop on PPC).
*
* We have to use the sync instructions for mb(), since lwsync doesn't
* order loads with respect to previous stores. Lwsync is fine for
* rmb(), though.
* For wmb(), we use sync since wmb is used in drivers to order
* stores to system memory with respect to writes to the device.
* However, smp_wmb() can be a lighter-weight eieio barrier on
* SMP since it is only used to order updates to system memory.
*/
#define mb() __asm__ __volatile__ ("sync" : : : "memory")
#define rmb() __asm__ __volatile__ ("lwsync" : : : "memory")
#define wmb() __asm__ __volatile__ ("sync" : : : "memory")
#define read_barrier_depends() do { } while(0)
#define set_mb(var, value) do { var = value; smp_mb(); } while (0)
#define set_wmb(var, value) do { var = value; smp_wmb(); } while (0)
#ifdef CONFIG_SMP
#define smp_mb() mb()
#define smp_rmb() rmb()
#define smp_wmb() eieio()
#define smp_read_barrier_depends() read_barrier_depends()
#else
#define smp_mb() __asm__ __volatile__("": : :"memory")
#define smp_rmb() __asm__ __volatile__("": : :"memory")
#define smp_wmb() __asm__ __volatile__("": : :"memory")
#define smp_read_barrier_depends() do { } while(0)
#endif /* CONFIG_SMP */
#ifdef __KERNEL__
struct task_struct;
struct pt_regs;
#ifdef CONFIG_DEBUGGER
extern int (*__debugger)(struct pt_regs *regs);
extern int (*__debugger_ipi)(struct pt_regs *regs);
extern int (*__debugger_bpt)(struct pt_regs *regs);
extern int (*__debugger_sstep)(struct pt_regs *regs);
extern int (*__debugger_iabr_match)(struct pt_regs *regs);
extern int (*__debugger_dabr_match)(struct pt_regs *regs);
extern int (*__debugger_fault_handler)(struct pt_regs *regs);
#define DEBUGGER_BOILERPLATE(__NAME) \
static inline int __NAME(struct pt_regs *regs) \
{ \
if (unlikely(__ ## __NAME)) \
return __ ## __NAME(regs); \
return 0; \
}
DEBUGGER_BOILERPLATE(debugger)
DEBUGGER_BOILERPLATE(debugger_ipi)
DEBUGGER_BOILERPLATE(debugger_bpt)
DEBUGGER_BOILERPLATE(debugger_sstep)
DEBUGGER_BOILERPLATE(debugger_iabr_match)
DEBUGGER_BOILERPLATE(debugger_dabr_match)
DEBUGGER_BOILERPLATE(debugger_fault_handler)
#ifdef CONFIG_XMON
extern void xmon_init(int enable);
#endif
#else
static inline int debugger(struct pt_regs *regs) { return 0; }
static inline int debugger_ipi(struct pt_regs *regs) { return 0; }
static inline int debugger_bpt(struct pt_regs *regs) { return 0; }
static inline int debugger_sstep(struct pt_regs *regs) { return 0; }
static inline int debugger_iabr_match(struct pt_regs *regs) { return 0; }
static inline int debugger_dabr_match(struct pt_regs *regs) { return 0; }
static inline int debugger_fault_handler(struct pt_regs *regs) { return 0; }
#endif
extern int set_dabr(unsigned long dabr);
extern void _exception(int signr, struct pt_regs *regs, int code,
unsigned long addr);
extern int fix_alignment(struct pt_regs *regs);
extern void bad_page_fault(struct pt_regs *regs, unsigned long address,
int sig);
extern void show_regs(struct pt_regs * regs);
extern void low_hash_fault(struct pt_regs *regs, unsigned long address);
extern int die(const char *str, struct pt_regs *regs, long err);
extern int _get_PVR(void);
extern void giveup_fpu(struct task_struct *);
extern void disable_kernel_fp(void);
extern void flush_fp_to_thread(struct task_struct *);
extern void enable_kernel_fp(void);
extern void giveup_altivec(struct task_struct *);
extern void disable_kernel_altivec(void);
extern void enable_kernel_altivec(void);
extern int emulate_altivec(struct pt_regs *);
extern void cvt_fd(float *from, double *to, struct thread_struct *thread);
extern void cvt_df(double *from, float *to, struct thread_struct *thread);
#ifdef CONFIG_ALTIVEC
extern void flush_altivec_to_thread(struct task_struct *);
#else
static inline void flush_altivec_to_thread(struct task_struct *t)
{
}
#endif
static inline void flush_spe_to_thread(struct task_struct *t)
{
}
extern int mem_init_done; /* set on boot once kmalloc can be called */
extern unsigned long memory_limit;
/* EBCDIC -> ASCII conversion for [0-9A-Z] on iSeries */
extern unsigned char e2a(unsigned char);
extern struct task_struct *__switch_to(struct task_struct *,
struct task_struct *);
#define switch_to(prev, next, last) ((last) = __switch_to((prev), (next)))
struct thread_struct;
extern struct task_struct * _switch(struct thread_struct *prev,
struct thread_struct *next);
extern unsigned long klimit;
extern int powersave_nap; /* set if nap mode can be used in idle loop */
/*
* Atomic exchange
*
* Changes the memory location '*ptr' to be val and returns
* the previous value stored there.
*
* Inline asm pulled from arch/ppc/kernel/misc.S so ppc64
* is more like most of the other architectures.
*/
static __inline__ unsigned long
__xchg_u32(volatile unsigned int *m, unsigned long val)
{
unsigned long dummy;
__asm__ __volatile__(
EIEIO_ON_SMP
"1: lwarx %0,0,%3 # __xchg_u32\n\
stwcx. %2,0,%3\n\
2: bne- 1b"
ISYNC_ON_SMP
: "=&r" (dummy), "=m" (*m)
: "r" (val), "r" (m)
: "cc", "memory");
return (dummy);
}
static __inline__ unsigned long
__xchg_u64(volatile long *m, unsigned long val)
{
unsigned long dummy;
__asm__ __volatile__(
EIEIO_ON_SMP
"1: ldarx %0,0,%3 # __xchg_u64\n\
stdcx. %2,0,%3\n\
2: bne- 1b"
ISYNC_ON_SMP
: "=&r" (dummy), "=m" (*m)
: "r" (val), "r" (m)
: "cc", "memory");
return (dummy);
}
/*
* This function doesn't exist, so you'll get a linker error
* if something tries to do an invalid xchg().
*/
extern void __xchg_called_with_bad_pointer(void);
static __inline__ unsigned long
__xchg(volatile void *ptr, unsigned long x, unsigned int size)
{
switch (size) {
case 4:
return __xchg_u32(ptr, x);
case 8:
return __xchg_u64(ptr, x);
}
__xchg_called_with_bad_pointer();
return x;
}
#define xchg(ptr,x) \
({ \
__typeof__(*(ptr)) _x_ = (x); \
(__typeof__(*(ptr))) __xchg((ptr), (unsigned long)_x_, sizeof(*(ptr))); \
})
#define tas(ptr) (xchg((ptr),1))
#define __HAVE_ARCH_CMPXCHG 1
static __inline__ unsigned long
__cmpxchg_u32(volatile unsigned int *p, unsigned long old, unsigned long new)
{
unsigned int prev;
__asm__ __volatile__ (
EIEIO_ON_SMP
"1: lwarx %0,0,%2 # __cmpxchg_u32\n\
cmpw 0,%0,%3\n\
bne- 2f\n\
stwcx. %4,0,%2\n\
bne- 1b"
ISYNC_ON_SMP
"\n\
2:"
: "=&r" (prev), "=m" (*p)
: "r" (p), "r" (old), "r" (new), "m" (*p)
: "cc", "memory");
return prev;
}
static __inline__ unsigned long
__cmpxchg_u64(volatile unsigned long *p, unsigned long old, unsigned long new)
{
unsigned long prev;
__asm__ __volatile__ (
EIEIO_ON_SMP
"1: ldarx %0,0,%2 # __cmpxchg_u64\n\
cmpd 0,%0,%3\n\
bne- 2f\n\
stdcx. %4,0,%2\n\
bne- 1b"
ISYNC_ON_SMP
"\n\
2:"
: "=&r" (prev), "=m" (*p)
: "r" (p), "r" (old), "r" (new), "m" (*p)
: "cc", "memory");
return prev;
}
/* This function doesn't exist, so you'll get a linker error
if something tries to do an invalid cmpxchg(). */
extern void __cmpxchg_called_with_bad_pointer(void);
static __inline__ unsigned long
__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new,
unsigned int size)
{
switch (size) {
case 4:
return __cmpxchg_u32(ptr, old, new);
case 8:
return __cmpxchg_u64(ptr, old, new);
}
__cmpxchg_called_with_bad_pointer();
return old;
}
#define cmpxchg(ptr,o,n)\
((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
(unsigned long)(n),sizeof(*(ptr))))
/*
* We handle most unaligned accesses in hardware. On the other hand
* unaligned DMA can be very expensive on some ppc64 IO chips (it does
* powers of 2 writes until it reaches sufficient alignment).
*
* Based on this we disable the IP header alignment in network drivers.
*/
#define NET_IP_ALIGN 0
#define arch_align_stack(x) (x)
extern unsigned long reloc_offset(void);
#endif /* __KERNEL__ */
#endif
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