diff options
Diffstat (limited to 'arch/xtensa/kernel/entry.S')
| -rw-r--r-- | arch/xtensa/kernel/entry.S | 82 |
1 files changed, 42 insertions, 40 deletions
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S index c85597a734aa..d09f2c38ba84 100644 --- a/arch/xtensa/kernel/entry.S +++ b/arch/xtensa/kernel/entry.S @@ -462,11 +462,11 @@ KABI_W or a3, a3, a2 * exception handler and call the exception handler. */ - l32i abi_arg1, a1, PT_EXCCAUSE # pass EXCCAUSE - rsr abi_tmp0, excsave1 - addx4 abi_tmp0, abi_arg1, abi_tmp0 - l32i abi_tmp0, abi_tmp0, EXC_TABLE_DEFAULT # load handler - mov abi_arg0, a1 # pass stack frame + l32i abi_arg1, a1, PT_EXCCAUSE # pass EXCCAUSE + rsr abi_tmp0, excsave1 + addx4 abi_tmp0, abi_arg1, abi_tmp0 + l32i abi_tmp0, abi_tmp0, EXC_TABLE_DEFAULT # load handler + mov abi_arg0, a1 # pass stack frame /* Call the second-level handler */ @@ -477,23 +477,23 @@ KABI_W or a3, a3, a2 common_exception_return: #if XTENSA_FAKE_NMI - l32i abi_tmp0, a1, PT_EXCCAUSE - movi abi_tmp1, EXCCAUSE_MAPPED_NMI - l32i abi_saved1, a1, PT_PS - beq abi_tmp0, abi_tmp1, .Lrestore_state + l32i abi_tmp0, a1, PT_EXCCAUSE + movi abi_tmp1, EXCCAUSE_MAPPED_NMI + l32i abi_saved1, a1, PT_PS + beq abi_tmp0, abi_tmp1, .Lrestore_state #endif .Ltif_loop: - irq_save a2, a3 + irq_save abi_tmp0, abi_tmp1 #ifdef CONFIG_TRACE_IRQFLAGS abi_call trace_hardirqs_off #endif /* Jump if we are returning from kernel exceptions. */ - l32i abi_saved1, a1, PT_PS - GET_THREAD_INFO(a2, a1) - l32i a4, a2, TI_FLAGS - _bbci.l abi_saved1, PS_UM_BIT, .Lexit_tif_loop_kernel + l32i abi_saved1, a1, PT_PS + GET_THREAD_INFO(abi_tmp0, a1) + l32i abi_saved0, abi_tmp0, TI_FLAGS + _bbci.l abi_saved1, PS_UM_BIT, .Lexit_tif_loop_kernel /* Specific to a user exception exit: * We need to check some flags for signal handling and rescheduling, @@ -502,75 +502,77 @@ common_exception_return: * Note that we don't disable interrupts here. */ - _bbsi.l a4, TIF_NEED_RESCHED, .Lresched - movi a2, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NOTIFY_SIGNAL - bnone a4, a2, .Lexit_tif_loop_user + _bbsi.l abi_saved0, TIF_NEED_RESCHED, .Lresched + movi abi_tmp0, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NOTIFY_SIGNAL + bnone abi_saved0, abi_tmp0, .Lexit_tif_loop_user - l32i a4, a1, PT_DEPC - bgeui a4, VALID_DOUBLE_EXCEPTION_ADDRESS, .Lrestore_state + l32i abi_tmp0, a1, PT_DEPC + bgeui abi_tmp0, VALID_DOUBLE_EXCEPTION_ADDRESS, .Lrestore_state /* Call do_signal() */ #ifdef CONFIG_TRACE_IRQFLAGS abi_call trace_hardirqs_on #endif - rsil a2, 0 - mov abi_arg0, a1 + rsil abi_tmp0, 0 + mov abi_arg0, a1 abi_call do_notify_resume # int do_notify_resume(struct pt_regs*) - j .Ltif_loop + j .Ltif_loop .Lresched: #ifdef CONFIG_TRACE_IRQFLAGS abi_call trace_hardirqs_on #endif - rsil a2, 0 + rsil abi_tmp0, 0 abi_call schedule # void schedule (void) - j .Ltif_loop + j .Ltif_loop .Lexit_tif_loop_kernel: #ifdef CONFIG_PREEMPTION - _bbci.l a4, TIF_NEED_RESCHED, .Lrestore_state + _bbci.l abi_saved0, TIF_NEED_RESCHED, .Lrestore_state /* Check current_thread_info->preempt_count */ - l32i a4, a2, TI_PRE_COUNT - bnez a4, .Lrestore_state + l32i abi_tmp1, abi_tmp0, TI_PRE_COUNT + bnez abi_tmp1, .Lrestore_state abi_call preempt_schedule_irq #endif - j .Lrestore_state + j .Lrestore_state .Lexit_tif_loop_user: #ifdef CONFIG_HAVE_HW_BREAKPOINT - _bbci.l a4, TIF_DB_DISABLED, 1f + _bbci.l abi_saved0, TIF_DB_DISABLED, 1f abi_call restore_dbreak 1: #endif #ifdef CONFIG_DEBUG_TLB_SANITY - l32i a4, a1, PT_DEPC - bgeui a4, VALID_DOUBLE_EXCEPTION_ADDRESS, .Lrestore_state + l32i abi_tmp0, a1, PT_DEPC + bgeui abi_tmp0, VALID_DOUBLE_EXCEPTION_ADDRESS, .Lrestore_state abi_call check_tlb_sanity #endif .Lrestore_state: #ifdef CONFIG_TRACE_IRQFLAGS - extui a4, abi_saved1, PS_INTLEVEL_SHIFT, PS_INTLEVEL_WIDTH - bgei a4, LOCKLEVEL, 1f + extui abi_tmp0, abi_saved1, PS_INTLEVEL_SHIFT, PS_INTLEVEL_WIDTH + bgei abi_tmp0, LOCKLEVEL, 1f abi_call trace_hardirqs_on 1: #endif - /* Restore optional registers. */ + /* + * Restore optional registers. + * abi_arg* are used as temporary registers here. + */ - load_xtregs_opt a1 a2 a4 a5 a6 a7 PT_XTREGS_OPT + load_xtregs_opt a1 abi_tmp0 abi_arg0 abi_arg1 abi_arg2 abi_arg3 PT_XTREGS_OPT /* Restore SCOMPARE1 */ #if XCHAL_HAVE_S32C1I - l32i a2, a1, PT_SCOMPARE1 - wsr a2, scompare1 + l32i abi_tmp0, a1, PT_SCOMPARE1 + wsr abi_tmp0, scompare1 #endif - wsr abi_saved1, ps /* disable interrupts */ - - _bbci.l abi_saved1, PS_UM_BIT, kernel_exception_exit + wsr abi_saved1, ps /* disable interrupts */ + _bbci.l abi_saved1, PS_UM_BIT, kernel_exception_exit user_exception_exit: |