diff options
Diffstat (limited to 'arch/arc/kernel/entry.S')
| -rw-r--r-- | arch/arc/kernel/entry.S | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S index b908dde8a33..47d09d07f09 100644 --- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -250,6 +250,14 @@ ARC_ENTRY handle_interrupt_level1 lr r0, [icause1] and r0, r0, 0x1f +#ifdef CONFIG_TRACE_IRQFLAGS + ; icause1 needs to be read early, before calling tracing, which + ; can clobber scratch regs, hence use of stack to stash it + push r0 + TRACE_ASM_IRQ_DISABLE + pop r0 +#endif + bl.d @arch_do_IRQ mov r1, sp @@ -337,9 +345,9 @@ 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 +356,8 @@ 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 @@ -358,16 +368,12 @@ 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 mov r2, sp ; callee_regs @@ -376,9 +382,6 @@ ARC_ENTRY EV_TLBProtV ; TBD: optimize - do this only if a callee reg was involved ; either a dst of emulated LD/ST or src with address-writeback RESTORE_CALLEE_SAVED_USER -#else - bl do_misaligned_error -#endif b ret_from_exception @@ -575,6 +578,7 @@ resume_user_mode_begin: ; --- (Slow Path #2) pending signal --- mov r0, sp ; pt_regs for arg to do_signal()/do_notify_resume() + GET_CURR_THR_INFO_FLAGS r9 bbit0 r9, TIF_SIGPENDING, .Lchk_notify_resume ; Normal Trap/IRQ entry only saves Scratch (caller-saved) regs @@ -640,6 +644,8 @@ resume_kernel_mode: restore_regs : + TRACE_ASM_IRQ_ENABLE + lr r10, [status32] ; Restore REG File. In case multiple Events outstanding, |