*
*/
-#include <linux/config.h>
#include <linux/errno.h>
#include <linux/sys.h>
#include <linux/threads.h>
stw r12,4(r11)
#endif
b 3f
+
2: /* if from kernel, check interrupted DOZE/NAP mode and
* check for stack overflow
*/
+ lwz r9,THREAD_INFO-THREAD(r12)
+ cmplw r1,r9 /* if r1 <= current->thread_info */
+ ble- stack_ovf /* then the kernel stack overflowed */
+5:
#ifdef CONFIG_6xx
- mfspr r11,SPRN_HID0
- mtcr r11
-BEGIN_FTR_SECTION
- bt- 8,power_save_6xx_restore /* Check DOZE */
-END_FTR_SECTION_IFSET(CPU_FTR_CAN_DOZE)
-BEGIN_FTR_SECTION
- bt- 9,power_save_6xx_restore /* Check NAP */
-END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP)
+ tophys(r9,r9) /* check local flags */
+ lwz r12,TI_LOCAL_FLAGS(r9)
+ mtcrf 0x01,r12
+ bt- 31-TLF_NAPPING,4f
#endif /* CONFIG_6xx */
.globl transfer_to_handler_cont
transfer_to_handler_cont:
- lwz r11,THREAD_INFO-THREAD(r12)
- cmplw r1,r11 /* if r1 <= current->thread_info */
- ble- stack_ovf /* then the kernel stack overflowed */
3:
mflr r9
lwz r11,0(r9) /* virtual address of handler */
lwz r9,4(r9) /* where to go when done */
- FIX_SRR1(r10,r12)
mtspr SPRN_SRR0,r11
mtspr SPRN_SRR1,r10
mtlr r9
SYNC
RFI /* jump to handler, enable MMU */
+#ifdef CONFIG_6xx
+4: rlwinm r12,r12,0,~_TLF_NAPPING
+ stw r12,TI_LOCAL_FLAGS(r9)
+ b power_save_6xx_restore
+#endif
+
/*
* On kernel stack overflow, load up an initial stack pointer
* and call StackOverflow(regs), which should not return.
*/
stack_ovf:
/* sometimes we use a statically-allocated stack, which is OK. */
- lis r11,_end@h
- ori r11,r11,_end@l
- cmplw r1,r11
- ble 3b /* r1 <= &_end is OK */
+ lis r12,_end@h
+ ori r12,r12,_end@l
+ cmplw r1,r12
+ ble 5b /* r1 <= &_end is OK */
SAVE_NVGPRS(r11)
addi r3,r1,STACK_FRAME_OVERHEAD
lis r1,init_thread_union@ha
0:
_GLOBAL(DoSyscall)
- stw r0,THREAD+LAST_SYSCALL(r2)
stw r3,ORIG_GPR3(r1)
li r12,0
stw r12,RESULT(r1)
#ifdef SHOW_SYSCALLS
bl do_show_syscall
#endif /* SHOW_SYSCALLS */
- rlwinm r10,r1,0,0,18 /* current_thread_info() */
- lwz r11,TI_LOCAL_FLAGS(r10)
- rlwinm r11,r11,0,~_TIFL_FORCE_NOERROR
- stw r11,TI_LOCAL_FLAGS(r10)
+ rlwinm r10,r1,0,0,(31-THREAD_SHIFT) /* current_thread_info() */
lwz r11,TI_FLAGS(r10)
andi. r11,r11,_TIF_SYSCALL_T_OR_A
bne- syscall_dotrace
bl do_show_syscall_exit
#endif
mr r6,r3
- li r11,-_LAST_ERRNO
- cmplw 0,r3,r11
- rlwinm r12,r1,0,0,18 /* current_thread_info() */
- blt+ 30f
- lwz r11,TI_LOCAL_FLAGS(r12)
- andi. r11,r11,_TIFL_FORCE_NOERROR
- bne 30f
- neg r3,r3
- lwz r10,_CCR(r1) /* Set SO bit in CR */
- oris r10,r10,0x1000
- stw r10,_CCR(r1)
-
+ rlwinm r12,r1,0,0,(31-THREAD_SHIFT) /* current_thread_info() */
/* disable interrupts so current_thread_info()->flags can't change */
-30: LOAD_MSR_KERNEL(r10,MSR_KERNEL) /* doesn't include MSR_EE */
+ LOAD_MSR_KERNEL(r10,MSR_KERNEL) /* doesn't include MSR_EE */
SYNC
MTMSRD(r10)
lwz r9,TI_FLAGS(r12)
- andi. r0,r9,(_TIF_SYSCALL_T_OR_A|_TIF_SIGPENDING|_TIF_NEED_RESCHED)
+ li r8,-_LAST_ERRNO
+ andi. r0,r9,(_TIF_SYSCALL_T_OR_A|_TIF_SINGLESTEP|_TIF_USER_WORK_MASK|_TIF_PERSYSCALL_MASK)
bne- syscall_exit_work
+ cmplw 0,r3,r8
+ blt+ syscall_exit_cont
+ lwz r11,_CCR(r1) /* Load CR */
+ neg r3,r3
+ oris r11,r11,0x1000 /* Set SO bit in CR */
+ stw r11,_CCR(r1)
syscall_exit_cont:
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
/* If the process has its own DBCR0 value, load it up. The single
syscall_dotrace:
SAVE_NVGPRS(r1)
li r0,0xc00
- stw r0,TRAP(r1)
+ stw r0,_TRAP(r1)
addi r3,r1,STACK_FRAME_OVERHEAD
bl do_syscall_trace_enter
lwz r0,GPR0(r1) /* Restore original registers */
b syscall_dotrace_cont
syscall_exit_work:
- stw r6,RESULT(r1) /* Save result */
+ andi. r0,r9,_TIF_RESTOREALL
+ beq+ 0f
+ REST_NVGPRS(r1)
+ b 2f
+0: cmplw 0,r3,r8
+ blt+ 1f
+ andi. r0,r9,_TIF_NOERROR
+ bne- 1f
+ lwz r11,_CCR(r1) /* Load CR */
+ neg r3,r3
+ oris r11,r11,0x1000 /* Set SO bit in CR */
+ stw r11,_CCR(r1)
+
+1: stw r6,RESULT(r1) /* Save result */
stw r3,GPR3(r1) /* Update return value */
- andi. r0,r9,_TIF_SYSCALL_T_OR_A
- beq 5f
+2: andi. r0,r9,(_TIF_PERSYSCALL_MASK)
+ beq 4f
+
+ /* Clear per-syscall TIF flags if any are set. */
+
+ li r11,_TIF_PERSYSCALL_MASK
+ addi r12,r12,TI_FLAGS
+3: lwarx r8,0,r12
+ andc r8,r8,r11
+#ifdef CONFIG_IBM405_ERR77
+ dcbt 0,r12
+#endif
+ stwcx. r8,0,r12
+ bne- 3b
+ subi r12,r12,TI_FLAGS
+
+4: /* Anything which requires enabling interrupts? */
+ andi. r0,r9,(_TIF_SYSCALL_T_OR_A|_TIF_SINGLESTEP)
+ beq ret_from_except
+
+ /* Re-enable interrupts */
ori r10,r10,MSR_EE
SYNC
- MTMSRD(r10) /* re-enable interrupts */
- lwz r4,TRAP(r1)
+ MTMSRD(r10)
+
+ /* Save NVGPRS if they're not saved already */
+ lwz r4,_TRAP(r1)
andi. r4,r4,1
- beq 4f
+ beq 5f
SAVE_NVGPRS(r1)
li r4,0xc00
- stw r4,TRAP(r1)
-4:
+ stw r4,_TRAP(r1)
+5:
addi r3,r1,STACK_FRAME_OVERHEAD
bl do_syscall_trace_leave
- REST_NVGPRS(r1)
-2:
- lwz r3,GPR3(r1)
- LOAD_MSR_KERNEL(r10,MSR_KERNEL) /* doesn't include MSR_EE */
- SYNC
- MTMSRD(r10) /* disable interrupts again */
- rlwinm r12,r1,0,0,18 /* current_thread_info() */
- lwz r9,TI_FLAGS(r12)
-5:
- andi. r0,r9,_TIF_NEED_RESCHED
- bne 1f
- lwz r5,_MSR(r1)
- andi. r5,r5,MSR_PR
- beq syscall_exit_cont
- andi. r0,r9,_TIF_SIGPENDING
- beq syscall_exit_cont
- b do_user_signal
-1:
- ori r10,r10,MSR_EE
- SYNC
- MTMSRD(r10) /* re-enable interrupts */
- bl schedule
- b 2b
+ b ret_from_except_full
#ifdef SHOW_SYSCALLS
do_show_syscall:
#endif /* SHOW_SYSCALLS */
/*
- * The sigsuspend and rt_sigsuspend system calls can call do_signal
- * and thus put the process into the stopped state where we might
- * want to examine its user state with ptrace. Therefore we need
- * to save all the nonvolatile registers (r13 - r31) before calling
- * the C code.
+ * The fork/clone functions need to copy the full register set into
+ * the child process. Therefore we need to save all the nonvolatile
+ * registers (r13 - r31) before calling the C code.
*/
- .globl ppc_sigsuspend
-ppc_sigsuspend:
- SAVE_NVGPRS(r1)
- lwz r0,TRAP(r1)
- rlwinm r0,r0,0,0,30 /* clear LSB to indicate full */
- stw r0,TRAP(r1) /* register set saved */
- b sys_sigsuspend
-
- .globl ppc_rt_sigsuspend
-ppc_rt_sigsuspend:
- SAVE_NVGPRS(r1)
- lwz r0,TRAP(r1)
- rlwinm r0,r0,0,0,30
- stw r0,TRAP(r1)
- b sys_rt_sigsuspend
-
.globl ppc_fork
ppc_fork:
SAVE_NVGPRS(r1)
- lwz r0,TRAP(r1)
+ lwz r0,_TRAP(r1)
rlwinm r0,r0,0,0,30 /* clear LSB to indicate full */
- stw r0,TRAP(r1) /* register set saved */
+ stw r0,_TRAP(r1) /* register set saved */
b sys_fork
.globl ppc_vfork
ppc_vfork:
SAVE_NVGPRS(r1)
- lwz r0,TRAP(r1)
+ lwz r0,_TRAP(r1)
rlwinm r0,r0,0,0,30 /* clear LSB to indicate full */
- stw r0,TRAP(r1) /* register set saved */
+ stw r0,_TRAP(r1) /* register set saved */
b sys_vfork
.globl ppc_clone
ppc_clone:
SAVE_NVGPRS(r1)
- lwz r0,TRAP(r1)
+ lwz r0,_TRAP(r1)
rlwinm r0,r0,0,0,30 /* clear LSB to indicate full */
- stw r0,TRAP(r1) /* register set saved */
+ stw r0,_TRAP(r1) /* register set saved */
b sys_clone
.globl ppc_swapcontext
ppc_swapcontext:
SAVE_NVGPRS(r1)
- lwz r0,TRAP(r1)
+ lwz r0,_TRAP(r1)
rlwinm r0,r0,0,0,30 /* clear LSB to indicate full */
- stw r0,TRAP(r1) /* register set saved */
+ stw r0,_TRAP(r1) /* register set saved */
b sys_swapcontext
/*
cmpwi r3,0
beq+ ret_from_except
SAVE_NVGPRS(r1)
- lwz r0,TRAP(r1)
+ lwz r0,_TRAP(r1)
clrrwi r0,r0,1
- stw r0,TRAP(r1)
+ stw r0,_TRAP(r1)
mr r5,r3
addi r3,r1,STACK_FRAME_OVERHEAD
lwz r4,_DAR(r1)
mr r12,r4 /* restart at exc_exit_restart */
b 2b
- .comm fee_restarts,4
+ .section .bss
+ .align 2
+fee_restarts:
+ .space 4
+ .previous
/* aargh, a nonrecoverable interrupt, panic */
/* aargh, we don't know which trap this is */
b 2b
END_FTR_SECTION_IFSET(CPU_FTR_601)
li r10,-1
- stw r10,TRAP(r11)
+ stw r10,_TRAP(r11)
addi r3,r1,STACK_FRAME_OVERHEAD
lis r10,MSR_KERNEL@h
ori r10,r10,MSR_KERNEL@l
.long ret_from_except
#endif
- .globl sigreturn_exit
-sigreturn_exit:
- subi r1,r3,STACK_FRAME_OVERHEAD
- rlwinm r12,r1,0,0,18 /* current_thread_info() */
- lwz r9,TI_FLAGS(r12)
- andi. r0,r9,_TIF_SYSCALL_T_OR_A
- beq+ ret_from_except_full
- bl do_syscall_trace_leave
- /* fall through */
-
.globl ret_from_except_full
ret_from_except_full:
REST_NVGPRS(r1)
user_exc_return: /* r10 contains MSR_KERNEL here */
/* Check current_thread_info()->flags */
- rlwinm r9,r1,0,0,18
+ rlwinm r9,r1,0,0,(31-THREAD_SHIFT)
lwz r9,TI_FLAGS(r9)
- andi. r0,r9,(_TIF_SIGPENDING|_TIF_NEED_RESCHED)
+ andi. r0,r9,(_TIF_SIGPENDING|_TIF_RESTORE_SIGMASK|_TIF_NEED_RESCHED)
bne do_work
restore_user:
/* N.B. the only way to get here is from the beq following ret_from_except. */
resume_kernel:
/* check current_thread_info->preempt_count */
- rlwinm r9,r1,0,0,18
+ rlwinm r9,r1,0,0,(31-THREAD_SHIFT)
lwz r0,TI_PREEMPT(r9)
cmpwi 0,r0,0 /* if non-zero, just restore regs and return */
bne restore
andi. r0,r3,MSR_EE /* interrupts off? */
beq restore /* don't schedule if so */
1: bl preempt_schedule_irq
- rlwinm r9,r1,0,0,18
+ rlwinm r9,r1,0,0,(31-THREAD_SHIFT)
lwz r3,TI_FLAGS(r9)
andi. r0,r3,_TIF_NEED_RESCHED
bne- 1b
mtspr SPRN_DBSR,r11 /* clear all pending debug events */
blr
- .comm global_dbcr0,8
+ .section .bss
+ .align 4
+global_dbcr0:
+ .space 8
+ .previous
#endif /* !(CONFIG_4xx || CONFIG_BOOKE) */
do_work: /* r10 contains MSR_KERNEL here */
LOAD_MSR_KERNEL(r10,MSR_KERNEL)
SYNC
MTMSRD(r10) /* disable interrupts */
- rlwinm r9,r1,0,0,18
+ rlwinm r9,r1,0,0,(31-THREAD_SHIFT)
lwz r9,TI_FLAGS(r9)
andi. r0,r9,_TIF_NEED_RESCHED
bne- do_resched
- andi. r0,r9,_TIF_SIGPENDING
+ andi. r0,r9,_TIF_SIGPENDING|_TIF_RESTORE_SIGMASK
beq restore_user
do_user_signal: /* r10 contains MSR_KERNEL here */
ori r10,r10,MSR_EE
SYNC
MTMSRD(r10) /* hard-enable interrupts */
/* save r13-r31 in the exception frame, if not already done */
- lwz r3,TRAP(r1)
+ lwz r3,_TRAP(r1)
andi. r0,r3,1
beq 2f
SAVE_NVGPRS(r1)
rlwinm r3,r3,0,0,30
- stw r3,TRAP(r1)
+ stw r3,_TRAP(r1)
2: li r3,0
addi r4,r1,STACK_FRAME_OVERHEAD
bl do_signal
BEGIN_FTR_SECTION
blr
END_FTR_SECTION_IFSET(CPU_FTR_601)
- lwz r3,TRAP(r1)
+ lwz r3,_TRAP(r1)
andi. r0,r3,1
beq 4f
SAVE_NVGPRS(r1)
rlwinm r3,r3,0,0,30
- stw r3,TRAP(r1)
+ stw r3,_TRAP(r1)
4: addi r3,r1,STACK_FRAME_OVERHEAD
bl nonrecoverable_exception
/* shouldn't return */
b 4b
- .comm ee_restarts,4
+ .section .bss
+ .align 2
+ee_restarts:
+ .space 4
+ .previous
/*
* PROM code for specific machines follows. Put it
* here so it's easy to add arch-specific sections later.
* -- Cort
*/
-#ifdef CONFIG_PPC_OF
+#ifdef CONFIG_PPC_RTAS
/*
* On CHRP, the Run-Time Abstraction Services (RTAS) have to be
* called with the MMU off.
stwu r1,-INT_FRAME_SIZE(r1)
mflr r0
stw r0,INT_FRAME_SIZE+4(r1)
- lis r4,rtas_data@ha
- lwz r4,rtas_data@l(r4)
+ LOAD_REG_ADDR(r4, rtas)
lis r6,1f@ha /* physical return address for rtas */
addi r6,r6,1f@l
tophys(r6,r6)
tophys(r7,r1)
- lis r8,rtas_entry@ha
- lwz r8,rtas_entry@l(r8)
+ lwz r8,RTASENTRY(r4)
+ lwz r4,RTASBASE(r4)
mfmsr r9
stw r9,8(r1)
LOAD_MSR_KERNEL(r0,MSR_KERNEL)
MTMSRD(r0) /* don't get trashed */
li r9,MSR_KERNEL & ~(MSR_IR|MSR_DR)
mtlr r6
- CLR_TOP32(r7)
mtspr SPRN_SPRG2,r7
mtspr SPRN_SRR0,r8
mtspr SPRN_SRR1,r9
twi 31,0,0
/* XXX load up BATs and panic */
-#endif /* CONFIG_PPC_OF */
+#endif /* CONFIG_PPC_RTAS */