diff options
Diffstat (limited to 'arch/microblaze/kernel/entry.S')
| -rw-r--r-- | arch/microblaze/kernel/entry.S | 78 |
1 files changed, 30 insertions, 48 deletions
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S index 1a6729dde49..772fe7415f8 100644 --- a/arch/microblaze/kernel/entry.S +++ b/arch/microblaze/kernel/entry.S @@ -305,7 +305,7 @@ C_ENTRY(_user_exception): swi r11, r1, PTO+PT_R1; /* Store user SP. */ addi r11, r0, 1; swi r11, r0, TOPHYS(PER_CPU(KM)); /* Now we're in kernel-mode. */ -2: lwi r31, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */ +2: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* Save away the syscall number. */ swi r12, r1, PTO+PT_R0; tovirt(r1,r1) @@ -322,8 +322,7 @@ C_ENTRY(_user_exception): rtid r11, 0 nop 3: - add r11, r0, CURRENT_TASK /* Get current task ptr into r11 */ - lwi r11, r11, TS_THREAD_INFO /* get thread info */ + lwi r11, CURRENT_TASK, TS_THREAD_INFO /* get thread info */ lwi r11, r11, TI_FLAGS /* get flags in thread info */ andi r11, r11, _TIF_WORK_SYSCALL_MASK beqi r11, 4f @@ -382,58 +381,50 @@ C_ENTRY(ret_from_trap): /* See if returning to kernel mode, if so, skip resched &c. */ bnei r11, 2f; + swi r3, r1, PTO + PT_R3 + swi r4, r1, PTO + PT_R4 + /* We're returning to user mode, so check for various conditions that * trigger rescheduling. */ - # FIXME: Restructure all these flag checks. - add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ - lwi r11, r11, TS_THREAD_INFO; /* get thread info */ + /* FIXME: Restructure all these flag checks. */ + lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */ lwi r11, r11, TI_FLAGS; /* get flags in thread info */ andi r11, r11, _TIF_WORK_SYSCALL_MASK beqi r11, 1f - swi r3, r1, PTO + PT_R3 - swi r4, r1, PTO + PT_R4 brlid r15, do_syscall_trace_leave addik r5, r1, PTO + PT_R0 - lwi r3, r1, PTO + PT_R3 - lwi r4, r1, PTO + PT_R4 1: - /* We're returning to user mode, so check for various conditions that * trigger rescheduling. */ - /* Get current task ptr into r11 */ - add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ - lwi r11, r11, TS_THREAD_INFO; /* get thread info */ + /* get thread info from current task */ + lwi r11, CURRENT_TASK, TS_THREAD_INFO; lwi r11, r11, TI_FLAGS; /* get flags in thread info */ andi r11, r11, _TIF_NEED_RESCHED; beqi r11, 5f; - swi r3, r1, PTO + PT_R3; /* store syscall result */ - swi r4, r1, PTO + PT_R4; bralid r15, schedule; /* Call scheduler */ nop; /* delay slot */ - lwi r3, r1, PTO + PT_R3; /* restore syscall result */ - lwi r4, r1, PTO + PT_R4; /* Maybe handle a signal */ -5: add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ - lwi r11, r11, TS_THREAD_INFO; /* get thread info */ +5: /* get thread info from current task*/ + lwi r11, CURRENT_TASK, TS_THREAD_INFO; lwi r11, r11, TI_FLAGS; /* get flags in thread info */ andi r11, r11, _TIF_SIGPENDING; beqi r11, 1f; /* Signals to handle, handle them */ - swi r3, r1, PTO + PT_R3; /* store syscall result */ - swi r4, r1, PTO + PT_R4; la r5, r1, PTO; /* Arg 1: struct pt_regs *regs */ add r6, r0, r0; /* Arg 2: sigset_t *oldset */ addi r7, r0, 1; /* Arg 3: int in_syscall */ bralid r15, do_signal; /* Handle any signals */ nop; + +/* Finally, return to user state. */ +1: lwi r3, r1, PTO + PT_R3; /* restore syscall result */ lwi r4, r1, PTO + PT_R4; -/* Finally, return to user state. */ -1: swi r0, r0, PER_CPU(KM); /* Now officially in user state. */ + swi r0, r0, PER_CPU(KM); /* Now officially in user state. */ add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ swi r11, r0, PER_CPU(CURRENT_SAVE); /* save current */ VM_OFF; @@ -565,7 +556,7 @@ C_ENTRY(sys_rt_sigreturn_wrapper): swi r11, r1, PTO+PT_R1; /* Store user SP. */ \ addi r11, r0, 1; \ swi r11, r0, TOPHYS(PER_CPU(KM)); /* Now we're in kernel-mode.*/\ -2: lwi r31, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */\ +2: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); \ /* Save away the syscall number. */ \ swi r0, r1, PTO+PT_R0; \ tovirt(r1,r1) @@ -673,9 +664,7 @@ C_ENTRY(ret_from_exc): /* We're returning to user mode, so check for various conditions that trigger rescheduling. */ - /* Get current task ptr into r11 */ - add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ - lwi r11, r11, TS_THREAD_INFO; /* get thread info */ + lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */ lwi r11, r11, TI_FLAGS; /* get flags in thread info */ andi r11, r11, _TIF_NEED_RESCHED; beqi r11, 5f; @@ -685,8 +674,7 @@ C_ENTRY(ret_from_exc): nop; /* delay slot */ /* Maybe handle a signal */ -5: add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ - lwi r11, r11, TS_THREAD_INFO; /* get thread info */ +5: lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */ lwi r11, r11, TI_FLAGS; /* get flags in thread info */ andi r11, r11, _TIF_SIGPENDING; beqi r11, 1f; /* Signals to handle, handle them */ @@ -802,7 +790,7 @@ C_ENTRY(_interrupt): swi r11, r0, TOPHYS(PER_CPU(KM)); 2: - lwi r31, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); + lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); swi r0, r1, PTO + PT_R0; tovirt(r1,r1) la r5, r1, PTO; @@ -817,8 +805,7 @@ ret_from_irq: lwi r11, r1, PTO + PT_MODE; bnei r11, 2f; - add r11, r0, CURRENT_TASK; - lwi r11, r11, TS_THREAD_INFO; + lwi r11, CURRENT_TASK, TS_THREAD_INFO; lwi r11, r11, TI_FLAGS; /* MS: get flags from thread info */ andi r11, r11, _TIF_NEED_RESCHED; beqi r11, 5f @@ -826,8 +813,7 @@ ret_from_irq: nop; /* delay slot */ /* Maybe handle a signal */ -5: add r11, r0, CURRENT_TASK; - lwi r11, r11, TS_THREAD_INFO; /* MS: get thread info */ +5: lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* MS: get thread info */ lwi r11, r11, TI_FLAGS; /* get flags in thread info */ andi r11, r11, _TIF_SIGPENDING; beqid r11, no_intr_resched @@ -855,8 +841,7 @@ no_intr_resched: /* MS: Return to kernel state. */ 2: #ifdef CONFIG_PREEMPT - add r11, r0, CURRENT_TASK; - lwi r11, r11, TS_THREAD_INFO; + lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* MS: get preempt_count from thread info */ lwi r5, r11, TI_PREEMPT_COUNT; bgti r5, restore; @@ -869,8 +854,7 @@ preempt: /* interrupts are off that's why I am calling preempt_chedule_irq */ bralid r15, preempt_schedule_irq nop - add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ - lwi r11, r11, TS_THREAD_INFO; /* get thread info */ + lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */ lwi r5, r11, TI_FLAGS; /* get flags in thread info */ andi r5, r5, _TIF_NEED_RESCHED; bnei r5, preempt /* if non zero jump to resched */ @@ -938,7 +922,7 @@ C_ENTRY(_debug_exception): swi r11, r1, PTO+PT_R1; /* Store user SP. */ addi r11, r0, 1; swi r11, r0, TOPHYS(PER_CPU(KM)); /* Now we're in kernel-mode. */ -2: lwi r31, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */ +2: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* Save away the syscall number. */ swi r0, r1, PTO+PT_R0; tovirt(r1,r1) @@ -958,8 +942,7 @@ dbtrap_call: rtbd r11, 0; bnei r11, 2f; /* Get current task ptr into r11 */ - add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ - lwi r11, r11, TS_THREAD_INFO; /* get thread info */ + lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */ lwi r11, r11, TI_FLAGS; /* get flags in thread info */ andi r11, r11, _TIF_NEED_RESCHED; beqi r11, 5f; @@ -972,8 +955,7 @@ dbtrap_call: rtbd r11, 0; /* XXX m68knommu also checks TASK_STATE & TASK_COUNTER here. */ /* Maybe handle a signal */ -5: add r11, r0, CURRENT_TASK; /* Get current task ptr into r11 */ - lwi r11, r11, TS_THREAD_INFO; /* get thread info */ +5: lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */ lwi r11, r11, TI_FLAGS; /* get flags in thread info */ andi r11, r11, _TIF_SIGPENDING; beqi r11, 1f; /* Signals to handle, handle them */ @@ -1030,7 +1012,7 @@ DBTRAP_return: /* Make global symbol for debugging */ ENTRY(_switch_to) /* prepare return value */ - addk r3, r0, r31 + addk r3, r0, CURRENT_TASK /* save registers in cpu_context */ /* use r11 and r12, volatile registers, as temp register */ @@ -1074,10 +1056,10 @@ ENTRY(_switch_to) nop swi r12, r11, CC_FSR - /* update r31, the current */ - lwi r31, r6, TI_TASK/* give me pointer to task which will be next */ + /* update r31, the current-give me pointer to task which will be next */ + lwi CURRENT_TASK, r6, TI_TASK /* stored it to current_save too */ - swi r31, r0, PER_CPU(CURRENT_SAVE) + swi CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE) /* get new process' cpu context and restore */ /* give me start where start context of next task */ |