Add support code for rt2880 SOC.

The code detects the SoC and registers the clk / pinmux settings.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Signed-off-by: NGabor Juhos <juhosg@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5176/

Add a field for the uart muxing mask and set it inside the rt305x setup code.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5744/

This will be used for RT3662/RT3883.
Signed-off-by: NGabor Juhos <juhosg@openwrt.org>
Acked-by: NJohn Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5173/

These structures are exported via struct ralink_pinmux rt_gpio_pinmux and can
hence be static.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5172/

Add proper namespacing to the variable.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5171/

RT2880 has a different location for the early serial port.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Acked-by: NGabor Juhos <juhosg@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5170/

Add a few missing defines that are needed to make memory detection work on the
RT5350.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Acked-by: NGabor Juhos <juhosg@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5169/

Trivial patch that adds a comment that makes the code more readable.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Acked-by: NGabor Juhos <juhosg@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5168/

Add a few missing clocks.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Acked-by: NGabor Juhos <juhosg@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5167/

Add a few missing defines that are needed to make USB and clock detection work
on the RT3352.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Acked-by: NGabor Juhos <juhosg@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5166/

The Ralink IRQ code was not handling the PCI IRQ yet. Add this functionaility
to make PCI work on rt3883.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Signed-off-by: NGabor Juhos <juhosg@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5165/

Previously this functionality was only available to users of the mips_machine
api. Moving the code to prom.c allows us to also add a OF wrapper.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5164/

Current GPIO chip implementation in octeon-irq is still broken, even after upstream
commit 87161ccd (MIPS: Octeon: Fix broken interrupt
controller code). It works for GPIO IRQs that have reset-default configuration, but
not for edge-triggered ones.

The problem is in octeon_irq_gpio_map_common(), which passes modified "hw" variable
(which has range of possible values 16..31) as "gpio_line" parameter to
octeon_irq_set_ciu_mapping(), which saves it in private data of the IRQ chip. Later,
neither octeon_irq_gpio_setup() is able to re-configure GPIOs (cvmx_write_csr() is
writing to non-existent CVMX_GPIO_BIT_CFGX), nor octeon_irq_ciu_gpio_ack() is able
to acknowledge such IRQ, because "mask" is incorrect.

Fix is trivial and has been tested on Cavium Octeon II -based board, including
both level-triggered and edge-triggered GPIO IRQs.
Signed-off-by: NAlexander Sverdlin <alexander.sverdlin.ext@nsn.com>
Cc: David Daney <david.daney@cavium.com>
Acked-by: NDavid Daney <david.daney@cavium.com>
Patchwork: http://patchwork.linux-mips.org/patch/4980/Acked-by: NJohn Crispin <blogic@openwrt.org>

Convert all uses of devm_request_and_ioremap() to the newly introduced
devm_ioremap_resource() which provides more consistent error handling.
Signed-off-by: NSilviu-Mihai Popescu <silviupopescu1990@gmail.com>
Patchwork: http://patchwork.linux-mips.org/patch/4986/Acked-by: NJohn Crispin <blogic@openwrt.org>

The operations on the bitmap pointers are protected by "memory"
clobbering raw_local_irq_{save,restore}(), so there is no need for
volatile here.  By removing the volatile we get better code generation
out of the compiler.
Signed-off-by: NDavid Daney <david.daney@cavium.com>
Patchwork: http://patchwork.linux-mips.org/patch/4966/Acked-by: NJohn Crispin <blogic@openwrt.org>

Currently, init_new_context() only for each online CPU, this may cause
memory corruption when CPU hotplug and fork() happens at the same time.
To avoid this, we make init_new_context() cover each possible CPU.

Scenario:
1, CPU#1 is being offline;
2, On CPU#0, do_fork() call dup_mm() and copy a mm_struct to the child;
3, On CPU#0, dup_mm() call init_new_context(), since CPU#1 is offline
   and init_new_context() only covers the online CPUs, child has the
   same asid as its parent on CPU#1 (however, child's asid should be 0);
4, CPU#1 is being online;
5, Now, if both parent and child run on CPU#1, memory corruption (e.g.
   segfault, bus error, etc.) will occur.
Signed-off-by: NHuacai Chen <chenhc@lemote.com>
Acked-by: NDavid Daney <david.daney@cavium.com>
Patchwork: http://patchwork.linux-mips.org/patch/4995/Acked-by: NJohn Crispin <blogic@openwrt.org>

This and the next patch resolve memory corruption problems while CPU
hotplug. Without these patches, memory corruption can triggered easily
as below:

On a quad-core MIPS platform, use "spawn" of UnixBench-5.1.3 (http://
code.google.com/p/byte-unixbench/) and a CPU hotplug script like this
(hotplug.sh):
while true; do
echo 0 >/sys/devices/system/cpu/cpu1/online
echo 0 >/sys/devices/system/cpu/cpu2/online
echo 0 >/sys/devices/system/cpu/cpu3/online
sleep 1
echo 1 >/sys/devices/system/cpu/cpu1/online
echo 1 >/sys/devices/system/cpu/cpu2/online
echo 1 >/sys/devices/system/cpu/cpu3/online
sleep 1
done

Run "hotplug.sh" and then run "spawn 10000", spawn will get segfault
after a few minutes.

This patch:
Currently, clear_page()/copy_page() are generated by Micro-assembler
dynamically. But they are unavailable until uasm_resolve_relocs() has
finished because jump labels are illegal before that. Since these
functions are shared by every CPU, we only call build_clear_page()/
build_copy_page() only once at boot time. Without this patch, programs
will get random memory corruption (segmentation fault, bus error, etc.)
while CPU Hotplug (e.g. one CPU is using clear_page() while another is
generating it in cpu_cache_init()).

For similar reasons we modify build_tlb_refill_handler()'s invocation.

V2:
1, Rework the code to make CPU#0 can be online/offline.
2, Introduce cpu_has_local_ebase feature since some types of MIPS CPU
   need a per-CPU tlb_refill_handler().
Signed-off-by: NHuacai Chen <chenhc@lemote.com>
Signed-off-by: NHongbing Hu <huhb@lemote.com>
Acked-by: NDavid Daney <david.daney@cavium.com>
Patchwork: http://patchwork.linux-mips.org/patch/4994/Acked-by: NJohn Crispin <blogic@openwrt.org>

The Kconfig symbol MIPS_DISABLE_OBSOLETE_IDE was added in v2.6.10. It
has never been used. Let's remove it.

The symbol was originally introduced by the following commit

commit 2bfa662b64a7ee593f3039c1d3fd81a7766a63cd
Author: Pete Popov <ppopov@embeddedalley.com>
Date:   Tue Oct 12 06:24:19 2004 +0000
    - Db1550 bug fixes
    - updated defconfig
    - updated Kconfig to use DMA_COHERENT since new silicon is coherent
Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Patchwork: http://patchwork.linux-mips.org/patch/5064/Acked-by: NJohn Crispin <blogic@openwrt.org>

The Kconfig symbol MIPS_BOARDS_GEN is unused since v2.6.27. It should
now be removed.
Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Patchwork: http://patchwork.linux-mips.org/patch/5063/Acked-by: NJohn Crispin <blogic@openwrt.org>

The support for PB1100, PB1500, and PB1550 got merged into the code for
DB1000 and DB1550 code in v3.7. When that was done the three related
Kconfig symbols were dropped. But not all related Kconfig macros were
removed. Do so now.

Note that the PB1100 code in the Au1100 LCD driver is removed entirely
and not converted to use its current Kconfig macro. That is done because
the macros it uses (PB1100_G_CONTROL, PB1100_G_CONTROL_BL, and
PB1100_G_CONTROL_VDD) are never defined. Actually only one of these was
ever defined (PB1100_G_CONTROL) but that define was removed in v2.6.34.
So, as far as I can tell, this code could have never compiled.
Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Patchwork: http://patchwork.linux-mips.org/patch/5040/Acked-by: NJohn Crispin <blogic@openwrt.org>

The commit c783390a [MIPS: oprofile:
Support for XLR/XLS processors] causes a compilation failure when
oprofile is enabled and SMP is not configured.

arch/mips/oprofile/op_model_mipsxx.c: In function 'mipsxx_cpu_setup':
arch/mips/oprofile/op_model_mipsxx.c:181:2: error: implicit declaration of function 'cpu_logical_map'

To fix this, update oprofile_skip_cpu to not call cpu_logical_map when
CONFIG_SMP is not defined.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/5037/Acked-by: NJohn Crispin <blogic@openwrt.org>

The definitions are not used anywhere else, and merging it will
make adding the new USB definitions for XLPII series easier.
While there, cleanup some whitespace in usb-init.c. There is no
change to logic due to this commit.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/5027/Acked-by: NJohn Crispin <blogic@openwrt.org>

This enables us to have a default device tree per SoC family to be built
into the kernel. The default device tree for XLP3xx has been added as part
of this change. Later this can be used to provide support default boards
for XLP2xx and XLP9xx SoCs.

Kconfig options are provided for each default device tree so that just the
needed ones can be selected to be built into the kernel.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/5023/Acked-by: NJohn Crispin <blogic@openwrt.org>

Remove unused functions and redundant comments from
arch/mips/include/asm/netlogic/haldefs.h
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/5029/Acked-by: NJohn Crispin <blogic@openwrt.org>

Update asm/netlogic/haldefs.h to extend register access functions
nlm_{read,write}_reg64() for 32-bit compilation. When compiled for 32-bit
the functions will read 64 IO registers with interrupts disabled.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/5026/Acked-by: NJohn Crispin <blogic@openwrt.org>

The index for a device interrupt in the PIC interrupt routing table
changes for different chips in the XLP family.  Avoid using the fixed
entries and derive the index value from the SoC device header.

Add workarounds for some devices which do not report the IRT index
correctly.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/5025/Acked-by: NJohn Crispin <blogic@openwrt.org>

Use standard function to print cpumask. Also fixup the name of the
variable used and make it static.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/5024/Acked-by: NJohn Crispin <blogic@openwrt.org>

Remove the definitions of {read,write}_c0_{eirr,eimr}. These functions
are now unused after the PIC and IRQ code has been updated to use
optimized EIMR/EIRR functions which work on both 32-bit and 64-bit.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/5021/Acked-by: NJohn Crispin <blogic@openwrt.org>

Remove the irq save/restore from write_c0_eimr(), as it is always called
with interrupts off.

This allows us to remove workaround in write_c0_eimr() to fix up the
flags used by local_irq_save. This fixup worked on XLR, but will break
when 32-bit support is added to r2 cpus like XLP.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/5022/Acked-by: NJohn Crispin <blogic@openwrt.org>

All the header file does is provide the internal structure of clk,
which shouldn't be used by anyone except clk.c itself anyway.
Signed-off-by: NJonas Gorski <jogo@openwrt.org>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Patchwork: http://patchwork.linux-mips.org/patch/5055/Acked-by: NJohn Crispin <blogic@openwrt.org>

BCM6362 support booting from SPI flash and NAND.
Signed-off-by: NJonas Gorski <jogo@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5012/Acked-by: NJohn Crispin <blogic@openwrt.org>

The PCIe controller is almost the same as the BCM6328 one, with only
the SERDES register being at a different location.
Signed-off-by: NJonas Gorski <jogo@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5011/Acked-by: NJohn Crispin <blogic@openwrt.org>

The SPI controller shares the same register layout as the 6358 one.
Signed-off-by: NJonas Gorski <jogo@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5010/Acked-by: NJohn Crispin <blogic@openwrt.org>

Add basic support for detecting and booting the BCM6362.
Signed-off-by: NJonas Gorski <jogo@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5009/Acked-by: NJohn Crispin <blogic@openwrt.org>

Instead of trying to use a correlation of cpu prid and chip id and
hoping they will always be unique, use the cpu prid to determine the
chip id register location and just read out the chip id.
Signed-off-by: NJonas Gorski <jogo@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5008/Acked-by: NJohn Crispin <blogic@openwrt.org>

The REVID is only 8 bit wide.
Signed-off-by: NJonas Gorski <jogo@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5007/Acked-by: NJohn Crispin <blogic@openwrt.org>

BCM6338 and BCM6348, and BCM6358 and everything after that share the
same register layout. To not have to redefine them for each new chip
and keep the code size small, only use the definitions for the first
chip with the certain layout.
Signed-off-by: NJonas Gorski <jogo@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5006/Acked-by: NJohn Crispin <blogic@openwrt.org>

Pull x86 fixes from Ingo Molnar:
 "Misc fixes"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mm: Flush lazy MMU when DEBUG_PAGEALLOC is set
  x86/mm/cpa/selftest: Fix false positive in CPA self test
  x86/mm/cpa: Convert noop to functional fix
  x86, mm: Patch out arch_flush_lazy_mmu_mode() when running on bare metal
  x86, mm, paravirt: Fix vmalloc_fault oops during lazy MMU updates

Pull scheduler fixes from Ingo Molnar:
 "Misc fixlets"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/cputime: Fix accounting on multi-threaded processes
  sched/debug: Fix sd->*_idx limit range avoiding overflow
  sched_clock: Prevent 64bit inatomicity on 32bit systems
  sched: Convert BUG_ON()s in try_to_wake_up_local() to WARN_ON_ONCE()s