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| author | Vineet Gupta <vgupta@synopsys.com> | 2013-07-09 11:37:13 +0200 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-08-26 06:10:25 +0200 |
| commit | 37f3ac498c988536f0d42b4659fb5d2c050b2f96 (patch) | |
| tree | 1e680c84ddf182c3e830517f96763c752928a099 /arch/arc/kernel | |
| parent | ARC: Add some .gitignore entries (diff) | |
| download | linux-37f3ac498c988536f0d42b4659fb5d2c050b2f96.tar.xz linux-37f3ac498c988536f0d42b4659fb5d2c050b2f96.zip | |
ARC: Exception Handlers Code consolidation
After the recent cleanups, all the exception handlers now have same
boilerplate prologue code. Move that into common macro.
This reduces readability but helps greatly with sharing / duplicating
entry code with ARCv2 ISA where the handlers are pretty much the same,
just the entry prologue is different (due to hardware assist).
Also while at it, add the missing FAKE_RET_FROM_EXCPN calls in couple of
places to drop down to pure kernel mode (from exception mode) before
jumping off into "C" code.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/kernel')
| -rw-r--r-- | arch/arc/kernel/entry.S | 56 |
1 files changed, 13 insertions, 43 deletions
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S index 1d7165156e17..059ca94e3df8 100644 --- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -267,12 +267,7 @@ ARC_EXIT handle_interrupt_level1 ARC_ENTRY instr_service - EXCPN_PROLOG_FREEUP_REG r9 - - lr r9, [erstatus] - - SWITCH_TO_KERNEL_STK - SAVE_ALL_SYS + EXCEPTION_PROLOGUE lr r0, [efa] mov r1, sp @@ -289,15 +284,13 @@ ARC_EXIT instr_service ARC_ENTRY mem_service - EXCPN_PROLOG_FREEUP_REG r9 - - lr r9, [erstatus] - - SWITCH_TO_KERNEL_STK - SAVE_ALL_SYS + EXCEPTION_PROLOGUE lr r0, [efa] mov r1, sp + + FAKE_RET_FROM_EXCPN r9 + bl do_memory_error b ret_from_exception ARC_EXIT mem_service @@ -308,11 +301,7 @@ ARC_EXIT mem_service ARC_ENTRY EV_MachineCheck - EXCPN_PROLOG_FREEUP_REG r9 - lr r9, [erstatus] - - SWITCH_TO_KERNEL_STK - SAVE_ALL_SYS + EXCEPTION_PROLOGUE lr r2, [ecr] lr r0, [efa] @@ -342,13 +331,7 @@ ARC_EXIT EV_MachineCheck ARC_ENTRY EV_TLBProtV - EXCPN_PROLOG_FREEUP_REG r9 - - ;Which mode (user/kernel) was the system in when Exception occured - lr r9, [erstatus] - - SWITCH_TO_KERNEL_STK - SAVE_ALL_SYS + EXCEPTION_PROLOGUE ;---------(3) Save some more regs----------------- ; vineetg: Mar 6th: Random Seg Fault issue #1 @@ -406,12 +389,7 @@ ARC_EXIT EV_TLBProtV ; --------------------------------------------- ARC_ENTRY EV_PrivilegeV - EXCPN_PROLOG_FREEUP_REG r9 - - lr r9, [erstatus] - - SWITCH_TO_KERNEL_STK - SAVE_ALL_SYS + EXCEPTION_PROLOGUE lr r0, [efa] mov r1, sp @@ -427,14 +405,13 @@ ARC_EXIT EV_PrivilegeV ; --------------------------------------------- ARC_ENTRY EV_Extension - EXCPN_PROLOG_FREEUP_REG r9 - lr r9, [erstatus] - - SWITCH_TO_KERNEL_STK - SAVE_ALL_SYS + EXCEPTION_PROLOGUE lr r0, [efa] mov r1, sp + + FAKE_RET_FROM_EXCPN r9 + bl do_extension_fault b ret_from_exception ARC_EXIT EV_Extension @@ -526,14 +503,7 @@ trap_with_param: ARC_ENTRY EV_Trap - ; Need at least 1 reg to code the early exception prolog - EXCPN_PROLOG_FREEUP_REG r9 - - ;Which mode (user/kernel) was the system in when intr occured - lr r9, [erstatus] - - SWITCH_TO_KERNEL_STK - SAVE_ALL_SYS + EXCEPTION_PROLOGUE ;------- (4) What caused the Trap -------------- lr r12, [ecr] |