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| author | Vineet Gupta <vgupta@synopsys.com> | 2013-09-18 12:55:40 +0200 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-11-06 06:11:39 +0100 |
| commit | 21a63b56044706aa37637315dd27d9d465bbd5c4 (patch) | |
| tree | c92bbd890472c22c99b89dd0749a117c7ca0a51e | |
| parent | ARC: cacheflush optim - PTAG can be loop invariant if V-P is const (diff) | |
| download | linux-21a63b56044706aa37637315dd27d9d465bbd5c4.tar.xz linux-21a63b56044706aa37637315dd27d9d465bbd5c4.zip | |
ARC: Change calling convention of do_page_fault()
switch the args (address, pt_regs) to match with all the other "C"
exception handlers.
This removes the awkwardness in EV_ProtV for page fault vs. unaligned
access.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
| -rw-r--r-- | arch/arc/kernel/entry.S | 9 | ||||
| -rw-r--r-- | arch/arc/mm/fault.c | 2 | ||||
| -rw-r--r-- | arch/arc/mm/tlbex.S | 4 |
3 files changed, 7 insertions, 8 deletions
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S index b908dde8a331..eb3f3c5a700a 100644 --- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -337,9 +337,9 @@ ARC_ENTRY EV_TLBProtV ; vineetg: Mar 6th: Random Seg Fault issue #1 ; ecr and efa were not saved in case an Intr sneaks in ; after fake rtie - ; + lr r2, [ecr] - lr r1, [efa] ; Faulting Data address + lr r0, [efa] ; Faulting Data address ; --------(4) Return from CPU Exception Mode --------- ; Fake a rtie, but rtie to next label @@ -348,6 +348,8 @@ ARC_ENTRY EV_TLBProtV FAKE_RET_FROM_EXCPN r9 + mov r1, sp + ;------ (5) Type of Protection Violation? ---------- ; ; ProtV Hardware Exception is triggered for Access Faults of 2 types @@ -358,14 +360,11 @@ ARC_ENTRY EV_TLBProtV bbit1 r2, ECR_C_BIT_PROTV_MISALIG_DATA, 4f ;========= (6a) Access Violation Processing ======== - mov r0, sp ; pt_regs bl do_page_fault b ret_from_exception ;========== (6b) Non aligned access ============ 4: - mov r0, r1 - mov r1, sp ; pt_regs #ifdef CONFIG_ARC_MISALIGN_ACCESS SAVE_CALLEE_SAVED_USER diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c index 0c14d8a52683..9c69552350c4 100644 --- a/arch/arc/mm/fault.c +++ b/arch/arc/mm/fault.c @@ -52,7 +52,7 @@ bad_area: return 1; } -void do_page_fault(struct pt_regs *regs, unsigned long address) +void do_page_fault(unsigned long address, struct pt_regs *regs) { struct vm_area_struct *vma = NULL; struct task_struct *tsk = current; diff --git a/arch/arc/mm/tlbex.S b/arch/arc/mm/tlbex.S index cf7d7d9ad695..3fcfdb38d242 100644 --- a/arch/arc/mm/tlbex.S +++ b/arch/arc/mm/tlbex.S @@ -369,8 +369,8 @@ do_slow_path_pf: EXCEPTION_PROLOGUE ; ------- setup args for Linux Page fault Hanlder --------- - mov_s r0, sp - lr r1, [efa] + mov_s r1, sp + lr r0, [efa] ; We don't want exceptions to be disabled while the fault is handled. ; Now that we have saved the context we return from exception hence |