Russell King dc21af99fa ARM: P2V: introduce phys_to_virt/virt_to_phys runtime patching ... This idea came from Nicolas, Eric Miao produced an initial version, which was then rewritten into this. Patch the physical to virtual translations at runtime. As we modify the code, this makes it incompatible with XIP kernels, but allows us to achieve this with minimal loss of performance. As many translations are of the form: physical = virtual + (PHYS_OFFSET - PAGE_OFFSET) virtual = physical - (PHYS_OFFSET - PAGE_OFFSET) we generate an 'add' instruction for __virt_to_phys(), and a 'sub' instruction for __phys_to_virt(). We calculate at run time (PHYS_OFFSET - PAGE_OFFSET) by comparing the address prior to MMU initialization with where it should be once the MMU has been initialized, and place this constant into the above add/sub instructions. Once we have (PHYS_OFFSET - PAGE_OFFSET), we can calculate the real PHYS_OFFSET as PAGE_OFFSET is a build-time constant, and save this for the C-mode PHYS_OFFSET variable definition to use. At present, we are unable to support Realview with Sparsemem enabled as this uses a complex mapping function, and MSM as this requires a constant which will not fit in our math instruction. Add a module version magic string for this feature to prevent incompatible modules being loaded. Tested-by: Tony Lindgren <tony@atomide.com> Reviewed-by: Nicolas Pitre <nicolas.pitre@linaro.org> Tested-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>		2011-02-17 23:27:32 +00:00
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.gitignore	[ARM] 5194/1: update .gitignore	2008-08-12 19:54:09 +01:00
armksyms.c	ARM: P2V: introduce phys_to_virt/virt_to_phys runtime patching	2011-02-17 23:27:32 +00:00
arthur.c	[ARM] arm/kernel/arthur.c: add MODULE_LICENSE	2008-05-17 22:55:16 +01:00
asm-offsets.c	arm: remove machine_desc.io_pg_offst and .phys_io	2010-10-20 00:27:46 -04:00
atags.c	clean up atags exporting code	2008-05-30 10:33:49 +02:00
atags.h	[ARM] 4736/1: Export atags to userspace and allow kexec to use customised atags	2008-02-04 13:21:03 +00:00
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: ecard: irq_data conversion.	2011-01-13 12:26:17 +01:00
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	Merge branch 'devel-stable' into devel	2011-01-06 22:33:32 +00:00
entry-common.S	Merge branch 'clksrc' into devel	2011-01-05 18:09:03 +00:00
entry-header.S	ARM: hw_breakpoint: disable preemption during debug exception handling	2010-12-06 11:55:56 +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	Merge branch 'smp' into misc	2011-01-06 22:32:03 +00:00
ftrace.c	ARM: ftrace: graph tracer + dynamic ftrace	2010-11-19 21:43:27 +05:30
head-common.S	ARM: Defer lookup of machine_type to setup.c	2011-02-15 16:36:44 +00:00
head-nommu.S	ARM: Defer lookup of machine_type to setup.c	2011-02-15 16:36:44 +00:00
head.S	ARM: P2V: introduce phys_to_virt/virt_to_phys runtime patching	2011-02-17 23:27:32 +00:00
hw_breakpoint.c	ARM: hw_breakpoint: do not fail initcall if monitor mode is disabled	2010-12-15 12:31:03 +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: core irq_data conversion.	2011-01-13 12:26:17 +01:00
isa.c	sysctl: Drop & in front of every proc_handler.	2009-11-18 08:37:40 -08:00
iwmmxt.S	ARM: pxa: add iwmmx support for PJ4	2010-12-20 23:07:36 +08:00
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: 6522/1: kexec: Add call to non-crashing cores through IPI	2010-12-04 11:02:04 +00:00
Makefile	Merge branch 'devel-stable' into devel	2011-01-06 22:33:32 +00:00
module.c	ARM: P2V: introduce phys_to_virt/virt_to_phys runtime patching	2011-02-17 23:27:32 +00:00
perf_event_v6.c	ARM: 6521/1: perf: use raw_spinlock_t for pmu_lock	2010-12-04 11:18:08 +00:00
perf_event_v7.c	ARM: 6521/1: perf: use raw_spinlock_t for pmu_lock	2010-12-04 11:18:08 +00:00
perf_event_xscale.c	ARM: 6521/1: perf: use raw_spinlock_t for pmu_lock	2010-12-04 11:18:08 +00:00
perf_event.c	Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm	2011-01-06 16:50:35 -08:00
pj4-cp0.c	ARM: pxa: add iwmmx support for PJ4	2010-12-20 23:07:36 +08:00
pmu.c	ARM: 6064/1: pmu: register IRQs at runtime	2010-05-17 11:53:57 +01:00
process.c	ARM: 6619/1: nommu: avoid mapping vectors page when !CONFIG_MMU	2011-01-11 17:32:24 +00:00
ptrace.c	ARM: ptrace: fix style issue with hw_breakpoint interface	2010-12-06 11:55:57 +00:00
ptrace.h	arm: use generic ptrace_resume code	2010-03-12 15:52:38 -08:00
relocate_kernel.S	ARM: 6497/1: kexec: Correct data alignment for CONFIG_THUMB2_KERNEL	2010-11-30 13:44:23 +00:00
return_address.c	[ARM] 5613/1: implement CALLER_ADDRESSx	2009-07-21 17:21:28 +01:00
sched_clock.c	ARM: sched_clock: make minsec argument to clocks_calc_mult_shift() zero	2011-01-11 16:44:02 +00:00
setup.c	ARM: P2V: avoid initializers and assembly using PHYS_OFFSET	2011-02-17 23:27:30 +00:00
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_tlb.c	ARM: SMP: split out software TLB maintainence broadcasting	2010-12-20 15:09:17 +00:00
smp_twd.c	ARM: twd: ensure timer reload is reprogrammed on entry to periodic mode	2011-01-25 21:17:58 +00:00
smp.c	Merge branch 'pgt' (early part) into devel	2011-01-06 22:33:19 +00:00
stacktrace.c	ARM: fix /proc/$PID/stack on SMP	2011-01-15 09:27:04 +00:00
swp_emulate.c	ARM: 6396/1: Add SWP/SWPB emulation for ARMv7 processors	2010-11-04 15:45:24 +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: P2V: separate PHYS_OFFSET from platform definitions	2011-02-17 23:26:55 +00:00
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: sched_clock: allow init_sched_clock() to be called early	2011-01-11 16:23:04 +00:00
traps.c	Merge branch 'pgt' (early part) into devel	2011-01-06 22:33:19 +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: P2V: introduce phys_to_virt/virt_to_phys runtime patching	2011-02-17 23:27:32 +00:00
xscale-cp0.c	ARM: Convert VFP/Crunch/XscaleCP thread_release() to exit_thread()	2009-12-18 14:53:41 +00:00