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linux/arch/arc/include/asm
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Vineet Gupta 502a0c775c ARC: pt_regs update #5: Use real ECR for pt_regs->event vs. synth values 
pt_regs->event was set with artificial values to identify the low level
system event (syscall trap / breakpoint trap / exceptions / interrupts)

With r8 saving out of the way, the full word can be used to save real
ECR (Exception Cause Register) which helps idenify the event naturally,
including additional info such as cause code, param.
Only for Interrupts, where ECR is not applicable, do we resort to
synthetic non ECR values.

SAVE_ALL_TRAP/EXCEPTIONS can now be merged as they both use ECR with
different runtime values.

The ptrace helpers now use the sub-fields of ECR to distinguish the
events (e.g. vector 0x25 is trap, param 0 is syscall...)

The following benefits will follow:

(1) This centralizes the location of where ECR is saved and will allow
    the cleanup of task->thread.cause_code ECR placeholder which is set
    in non-uniform way. Then ARC VM code can safely rely on it being
    there for purpose of finer grained VM_EXEC dcache flush (based on
    exec fault: I-TLB Miss)

(2) Further, ECR being passed around from low level handlers as arg can
    be eliminated as it is part of standard reg-file in pt_regs

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
 		2013-06-26 14:04:48 +05:30
..
Kbuild ARC: [mm] Aliasing VIPT dcache support 4/4 2013-05-09 22:00:57 +05:30
arcregs.h ARC: pt_regs update #5: Use real ECR for pt_regs->event vs. synth values 2013-06-26 14:04:48 +05:30
asm-offsets.h ARC: Generic Headers 2013-01-28 12:34:21 +05:30
atomic.h ARC: Atomic/bitops/cmpxchg/barriers 2013-02-11 20:00:30 +05:30
barrier.h ARC: Atomic/bitops/cmpxchg/barriers 2013-02-11 20:00:30 +05:30
bitops.h ARC: Atomic/bitops/cmpxchg/barriers 2013-02-11 20:00:30 +05:30
bug.h ARC: Fundamental ARCH data-types/defines 2013-02-11 20:00:34 +05:30
cache.h ARC: cache detection code bitrot 2013-06-22 13:46:43 +05:30
cacheflush.h ARC: [mm] Assume pagecache page dirty by default 2013-06-22 19:23:19 +05:30
checksum.h ARC: Checksum/byteorder/swab routines 2013-02-11 20:00:34 +05:30
clk.h ARC: [DeviceTree] Convert some Kconfig items to runtime values 2013-02-15 23:15:56 +05:30
cmpxchg.h ARC: Atomic/bitops/cmpxchg/barriers 2013-02-11 20:00:30 +05:30
current.h ARC: [optim] Cache "current" in Register r25 2013-02-15 23:15:58 +05:30
delay.h ARC: Timers/counters/delay management 2013-02-11 20:00:39 +05:30
disasm.h ARC: disassembly (needed by kprobes/kgdb/unaligned-access-emul) 2013-02-15 23:16:04 +05:30
dma-mapping.h arc: fix dma_address assignment during dma_map_sg() 2013-03-19 15:34:53 +05:30
dma.h ARC: I/O and DMA Mappings 2013-02-15 23:15:54 +05:30
elf.h ARC: Remove SET_PERSONALITY (tracks cross-arch change) 2013-03-18 14:37:05 +05:30
entry.h ARC: pt_regs update #5: Use real ECR for pt_regs->event vs. synth values 2013-06-26 14:04:48 +05:30
exec.h ARC: Fundamental ARCH data-types/defines 2013-02-11 20:00:34 +05:30
futex.h ARC: Futex support 2013-02-15 23:16:00 +05:30
io.h ARC: Add support for ioremap_prot API 2013-02-15 23:16:11 +05:30
irq.h ARC: Prepare interrupt code for external controllers 2013-05-07 13:43:58 +05:30
irqflags.h ARC: Disintegrate arcregs.h 2013-06-22 13:46:42 +05:30
kdebug.h ARC: Fundamental ARCH data-types/defines 2013-02-11 20:00:34 +05:30
kgdb.h ARC: make allyesconfig build breakages 2013-03-11 19:01:09 +05:30
kprobes.h ARC: kprobes support 2013-02-15 23:16:05 +05:30
linkage.h ARC: Support for single cycle Close Coupled Mem (CCM) 2013-02-15 23:16:10 +05:30
mach_desc.h ARC: make a copy of flat DT 2013-02-26 14:25:18 +05:30
mmu.h ARC: Disintegrate arcregs.h 2013-06-22 13:46:42 +05:30
mmu_context.h ARC: SMP support 2013-02-15 23:16:02 +05:30
module.h ARC: DWARF2 .debug_frame based stack unwinder 2013-02-15 23:16:03 +05:30
mutex.h ARC: SMP support 2013-02-15 23:16:02 +05:30
page.h ARC: [mm] Make stack/heap Non-executable by default 2013-06-22 19:23:20 +05:30
perf_event.h ARC: perf support (software counters only) 2013-02-15 23:16:09 +05:30
pgalloc.h ARC: Page Table Management 2013-02-15 23:15:51 +05:30
pgtable.h ARC: Disintegrate arcregs.h 2013-06-22 13:46:42 +05:30
processor.h ARC: pt_regs update #4: r25 saved/restored unconditionally 2013-06-22 19:23:25 +05:30
prom.h ARC: [Review] Multi-platform image #2: Board callback Infrastructure 2013-02-15 23:16:13 +05:30
ptrace.h ARC: pt_regs update #5: Use real ECR for pt_regs->event vs. synth values 2013-06-26 14:04:48 +05:30
sections.h ARC: [DeviceTree] Basic support 2013-02-15 23:15:55 +05:30
segment.h ARC: uaccess friends 2013-02-11 20:00:31 +05:30
serial.h ARC: [TB10x] Add support for TB10x platform 2013-05-07 13:43:59 +05:30
setup.h ARC: UAPI Disintegrate arch/arc/include/asm 2013-02-15 23:16:11 +05:30
shmparam.h ARC: [mm] Aliasing VIPT dcache support 4/4 2013-05-09 22:00:57 +05:30
smp.h ARC: [Review] Multi-platform image #7: SMP common code to use callbacks 2013-02-15 23:16:16 +05:30
spinlock.h ARC: Spinlock/rwlock/mutex primitives 2013-02-11 20:00:35 +05:30
spinlock_types.h ARC: Spinlock/rwlock/mutex primitives 2013-02-11 20:00:35 +05:30
string.h ARC: String library 2013-02-11 20:00:35 +05:30
switch_to.h ARC: Process-creation/scheduling/idle-loop 2013-02-11 20:00:38 +05:30
syscall.h ARC: stop using pt_regs->orig_r8 2013-06-22 19:23:26 +05:30
syscalls.h ARC: ABIv3: fork/vfork wrappers not needed in "no-legacy-syscall" ABI 2013-03-11 19:01:10 +05:30
thread_info.h ARC: Fundamental ARCH data-types/defines 2013-02-11 20:00:34 +05:30
timex.h ARC: Timers/counters/delay management 2013-02-11 20:00:39 +05:30
tlb-mmu1.h ARC: Disintegrate arcregs.h 2013-06-22 13:46:42 +05:30
tlb.h ARC: Disintegrate arcregs.h 2013-06-22 13:46:42 +05:30
tlbflush.h ARC: TLB flush Handling 2013-02-15 23:15:53 +05:30
uaccess.h ARC: [optim] uaccess __{get,put}_user() optimised 2013-02-11 20:00:32 +05:30
unaligned.h ARC: Unaligned access emulation 2013-02-15 23:16:06 +05:30
unwind.h ARC: DWARF2 .debug_frame based stack unwinder 2013-02-15 23:16:03 +05:30