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| author | Vineet Gupta <vgupta@synopsys.com> | 2013-06-12 11:43:40 +0200 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-06-26 12:00:50 +0200 |
| commit | 38a9ff6d247cf9afcbe55ea245b650b8955029fd (patch) | |
| tree | c2603e639b98463ebc1b2de95dcbfffd338c8138 /arch/arc/mm | |
| parent | ARC: pt_regs update #5: Use real ECR for pt_regs->event vs. synth values (diff) | |
| download | linux-38a9ff6d247cf9afcbe55ea245b650b8955029fd.tar.xz linux-38a9ff6d247cf9afcbe55ea245b650b8955029fd.zip | |
ARC: Remove explicit passing around of ECR
With ECR now part of pt_regs
* No need to propagate from lowest asm handlers as arg
* No need to save it in tsk->thread.cause_code
* Avoid bit chopping to access the bit-fields
More code consolidation, cleanup
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/mm')
| -rw-r--r-- | arch/arc/mm/fault.c | 12 | ||||
| -rw-r--r-- | arch/arc/mm/tlbex.S | 1 |
2 files changed, 5 insertions, 8 deletions
diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c index fdafeb1917cc..318164cabdfc 100644 --- a/arch/arc/mm/fault.c +++ b/arch/arc/mm/fault.c @@ -52,15 +52,14 @@ bad_area: return 1; } -void do_page_fault(struct pt_regs *regs, unsigned long address, - unsigned long cause_code) +void do_page_fault(struct pt_regs *regs, unsigned long address) { struct vm_area_struct *vma = NULL; struct task_struct *tsk = current; struct mm_struct *mm = tsk->mm; siginfo_t info; int fault, ret; - int write = cause_code & (1 << ECR_C_BIT_DTLB_ST_MISS); /* ST/EX */ + int write = regs->ecr_cause & ECR_C_PROTV_STORE; /* ST/EX */ unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE | (write ? FAULT_FLAG_WRITE : 0); @@ -111,7 +110,8 @@ good_area: /* Handle protection violation, execute on heap or stack */ - if (cause_code == ((ECR_V_PROTV << 16) | ECR_C_PROTV_INST_FETCH)) + if ((regs->ecr_vec == ECR_V_PROTV) && + (regs->ecr_cause == ECR_C_PROTV_INST_FETCH)) goto bad_area; if (write) { @@ -178,7 +178,6 @@ bad_area_nosemaphore: /* User mode accesses just cause a SIGSEGV */ if (user_mode(regs)) { tsk->thread.fault_address = address; - tsk->thread.cause_code = cause_code; info.si_signo = SIGSEGV; info.si_errno = 0; /* info.si_code has been set above */ @@ -199,7 +198,7 @@ no_context: if (fixup_exception(regs)) return; - die("Oops", regs, address, cause_code); + die("Oops", regs, address); out_of_memory: if (is_global_init(tsk)) { @@ -220,7 +219,6 @@ do_sigbus: goto no_context; tsk->thread.fault_address = address; - tsk->thread.cause_code = cause_code; info.si_signo = SIGBUS; info.si_errno = 0; info.si_code = BUS_ADRERR; diff --git a/arch/arc/mm/tlbex.S b/arch/arc/mm/tlbex.S index bd8bc90f61d3..8d61fdf7a43b 100644 --- a/arch/arc/mm/tlbex.S +++ b/arch/arc/mm/tlbex.S @@ -382,7 +382,6 @@ do_slow_path_pf: ; ------- setup args for Linux Page fault Hanlder --------- mov_s r0, sp lr r1, [efa] - lr r2, [ecr] ; 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 |