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ac88e07122
linux/arch/arm/kernel
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Will Deacon ac88e07122 ARM: hw_breakpoint: ensure OS lock is clear before writing to debug registers 
ARMv7 architects a system for saving and restoring the debug registers
across low-power modes. At the heart of this system is a lock register
which, when set, forbids writes to the debug registers. While locked,
writes to debug registers via the co-processor interface will result
in undefined instruction traps. Linux currently doesn't make use of
this feature because we update the debug registers on context switch
anyway, however the status of the lock is IMPLEMENTATION DEFINED on
reset.

This patch ensures that the lock is cleared during boot so that we
can write to the debug registers safely.

Signed-off-by: Will Deacon <will.deacon@arm.com>
2010-12-06 11:55:56 +00:00
..
.gitignore [ARM] 5194/1: update .gitignore 2008-08-12 19:54:09 +01:00
armksyms.c ARM: 6314/1: ftrace: allow build without frame pointers on ARM 2010-09-02 15:24:53 +01:00
arthur.c
asm-offsets.c arm: remove machine_desc.io_pg_offst and .phys_io 2010-10-20 00:27:46 -04:00
atags.c
atags.h
bios32.c ARM: 6058/1: Add support for PCI domains 2010-04-22 21:38:11 +01:00
calls.S ARM: 6343/1: wire up fanotify and prlimit64 syscalls on ARM 2010-09-01 10:06:08 +01:00
compat.c ARM: deprecate support for old way to pass kernel parameters 2010-07-07 16:38:36 +02:00
compat.h ARM: deprecate support for old way to pass kernel parameters 2010-07-07 16:38:36 +02:00
crash_dump.c ARM: 6120/1: kdump: implement copy_oldmem_page() 2010-07-09 15:00:53 +01:00
crunch-bits.S [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
crunch.c ARM: Convert VFP/Crunch/XscaleCP thread_release() to exit_thread() 2009-12-18 14:53:41 +00:00
debug.S arm: return both physical and virtual addresses from addruart 2010-10-20 00:27:33 -04:00
dma-isa.c ARM: dma-isa: request cascade channel after registering it 2009-12-24 18:34:08 +00:00
dma.c ARM: dma: add /proc/dma support to arch/arm/kernel/dma.c 2010-04-14 13:13:30 +01:00
early_printk.c ARM: Add an earlyprintk debug console 2009-12-09 10:02:18 +00:00
ecard.c arm: struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-06 10:44:43 -08:00
ecard.h [ARM] rpc: ecard: remove deprecated ecard_address() and relatives 2008-07-03 14:25:58 +01:00
elf.c ARM: 5883/1: Revert "disable NX support for OABI-supporting kernels" 2010-01-18 14:12:11 +00:00
entry-armv.S ARM: Allow SMP kernels to boot on UP systems 2010-10-04 20:23:36 +01:00
entry-common.S Merge branch 'devel-stable' into devel 2010-10-19 22:06:36 +01:00
entry-header.S ARM: 5991/1: Fix regression in restore_user_regs macro 2010-03-15 17:20:08 +00:00
etm.c Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl 2010-10-22 10:52:56 -07:00
fiq.c [ARM] 5421/1: ftrace: fix crash due to tracing of __naked functions 2009-03-12 21:33:03 +00:00
ftrace.c ARM: 6319/1: ftrace: add Thumb-2 support to dynamic ftrace 2010-09-02 15:28:43 +01:00
head-common.S Merge branch 'hotplug' into devel 2010-10-18 22:34:47 +01:00
head-nommu.S ARM: no need for nommu to jump through the hoops that mmu does 2010-10-08 10:07:27 +01:00
head.S arm: use addruart macro to establish debug mappings 2010-10-20 00:27:34 -04:00
hw_breakpoint.c ARM: hw_breakpoint: ensure OS lock is clear before writing to debug registers 2010-12-06 11:55:56 +00:00
init_task.c Use new __init_task_data macro in arch init_task.c files. 2009-09-21 06:27:08 +02:00
io.c [ARM] Convert asm/io.h to linux/io.h 2008-09-06 12:10:45 +01:00
irq.c arm: Use ARCH_IRQ_INIT_FLAGS 2010-10-16 22:57:38 +02:00
isa.c sysctl: Drop & in front of every proc_handler. 2009-11-18 08:37:40 -08:00
iwmmxt.S
kgdb.c kgdb,arm: fix register dump 2010-10-29 13:14:40 -05:00
kprobes-decode.c ARM: 6412/1: kprobes-decode: add support for MOVW instruction 2010-10-04 19:21:37 +01:00
kprobes.c Merge branch 'master' into export-slabh 2010-04-05 11:37:28 +09:00
leds.c ARM: move LED support code out of arch/arm/kernel/time.c 2010-02-15 21:39:12 +00:00
machine_kexec.c arm: Disable outer (L2) cache in kexec 2010-10-26 11:39:56 +05:30
Makefile ARM: 6358/1: hw-breakpoint: add HAVE_HW_BREAKPOINT to Kconfig 2010-09-08 10:05:01 +01:00
module.c ARM: 6340/1: module - additional unwind tables for exit/devexit sections 2010-09-02 15:31:35 +01:00
perf_event.c ARM: 6469/1: perf-events: squash compiler warning 2010-11-07 16:12:38 +00:00
pmu.c ARM: 6064/1: pmu: register IRQs at runtime 2010-05-17 11:53:57 +01:00
process.c Merge branch 'devel-stable' into devel 2010-10-19 22:06:36 +01:00
ptrace.c ptrace: cleanup arch_ptrace() on ARM 2010-10-27 18:03:10 -07:00
ptrace.h arm: use generic ptrace_resume code 2010-03-12 15:52:38 -08:00
relocate_kernel.S ARM: 6119/1: kdump: skip indirection page when crashing 2010-07-09 15:00:52 +01:00
return_address.c [ARM] 5613/1: implement CALLER_ADDRESSx 2009-07-21 17:21:28 +01:00
setup.c Merge branches 'at91', 'dcache', 'ftrace', 'hwbpt', 'misc', 'mmci', 's3c', 'st-ux' and 'unwind' into devel 2010-10-18 22:34:25 +01:00
signal.c ARM: 6051/1: VFP: preserve the HW context when calling signal handlers 2010-04-14 11:11:30 +01:00
signal.h ARM: Fix signal restart issues with NX and OABI compat 2009-10-25 15:39:37 +00:00
smp_scu.c Check whether the SCU was already initialised 2009-11-05 10:10:36 +00:00
smp_twd.c ARM: SMP: Always enable clock event broadcast support 2010-07-27 10:48:42 +01:00
smp.c Merge branch 'hotplug' into devel 2010-10-18 22:34:47 +01:00
stacktrace.c ARM: 6468/1: backtrace: fix calculation of thread stack base 2010-11-07 16:12:37 +00:00
sys_arm.c Make do_execve() take a const filename pointer 2010-08-17 18:07:43 -07:00
sys_oabi-compat.c Mark arguments to certain syscalls as being const 2010-08-13 16:53:13 -07:00
tcm.c ARM: 6225/1: make TCM allocation static and common for all archs 2010-07-27 10:42:38 +01:00
tcm.h ARM: 5580/2: ARM TCM (Tightly-Coupled Memory) support v3 2009-09-15 22:11:05 +01:00
thumbee.c Fix the teehbr_read function prototype 2008-11-10 14:14:11 +00:00
time.c ARM: convert arm to arch_gettimeoffset() 2010-03-24 08:08:58 +00:00
traps.c ARM: arch/arm/kernel/traps.c: Convert sprintf_symbol to %pS 2010-11-07 17:58:40 +00:00
unwind.c ARM: 6468/1: backtrace: fix calculation of thread stack base 2010-11-07 16:12:37 +00:00
vmlinux.lds.S ARM: 6465/1: Fix data abort accessing proc_info from __lookup_processor_type 2010-10-27 21:40:29 +01:00
xscale-cp0.c ARM: Convert VFP/Crunch/XscaleCP thread_release() to exit_thread() 2009-12-18 14:53:41 +00:00