diff options
Diffstat (limited to 'arch/parisc/kernel/entry.S')
| -rw-r--r-- | arch/parisc/kernel/entry.S | 68 |
1 files changed, 61 insertions, 7 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index f33201bf897..4bb96ad9b0b 100644 --- a/arch/parisc/kernel/entry.S +++ b/arch/parisc/kernel/entry.S @@ -400,7 +400,15 @@ #if PT_NLEVELS == 3 extru \va,31-ASM_PMD_SHIFT,ASM_BITS_PER_PMD,\index #else +# if defined(CONFIG_64BIT) + extrd,u \va,63-ASM_PGDIR_SHIFT,ASM_BITS_PER_PGD,\index + #else + # if PAGE_SIZE > 4096 + extru \va,31-ASM_PGDIR_SHIFT,32-ASM_PGDIR_SHIFT,\index + # else extru \va,31-ASM_PGDIR_SHIFT,ASM_BITS_PER_PGD,\index + # endif +# endif #endif dep %r0,31,PAGE_SHIFT,\pmd /* clear offset */ copy %r0,\pte @@ -615,7 +623,7 @@ .text - .align PAGE_SIZE + .align 4096 ENTRY(fault_vector_20) /* First vector is invalid (0) */ @@ -825,11 +833,6 @@ ENTRY(syscall_exit_rfi) STREG %r19,PT_SR7(%r16) intr_return: - /* NOTE: Need to enable interrupts incase we schedule. */ - ssm PSW_SM_I, %r0 - -intr_check_resched: - /* check for reschedule */ mfctl %cr30,%r1 LDREG TI_FLAGS(%r1),%r19 /* sched.h: TIF_NEED_RESCHED */ @@ -856,6 +859,11 @@ intr_check_sig: LDREG PT_IASQ1(%r16), %r20 cmpib,COND(=),n 0,%r20,intr_restore /* backward */ + /* NOTE: We need to enable interrupts if we have to deliver + * signals. We used to do this earlier but it caused kernel + * stack overflows. */ + ssm PSW_SM_I, %r0 + copy %r0, %r25 /* long in_syscall = 0 */ #ifdef CONFIG_64BIT ldo -16(%r30),%r29 /* Reference param save area */ @@ -907,6 +915,10 @@ intr_do_resched: cmpib,COND(=) 0, %r20, intr_do_preempt nop + /* NOTE: We need to enable interrupts if we schedule. We used + * to do this earlier but it caused kernel stack overflows. */ + ssm PSW_SM_I, %r0 + #ifdef CONFIG_64BIT ldo -16(%r30),%r29 /* Reference param save area */ #endif @@ -1694,7 +1706,8 @@ ENTRY(sys_\name\()_wrapper) ldo TASK_REGS(%r1),%r1 reg_save %r1 mfctl %cr27, %r28 - b sys_\name + ldil L%sys_\name, %r31 + be R%sys_\name(%sr4,%r31) STREG %r28, PT_CR27(%r1) ENDPROC(sys_\name\()_wrapper) .endm @@ -1997,6 +2010,47 @@ ftrace_stub: ENDPROC(return_to_handler) #endif /* CONFIG_FUNCTION_TRACER */ +#ifdef CONFIG_IRQSTACKS +/* void call_on_stack(unsigned long param1, void *func, + unsigned long new_stack) */ +ENTRY(call_on_stack) + copy %sp, %r1 + + /* Regarding the HPPA calling conventions for function pointers, + we assume the PIC register is not changed across call. For + CONFIG_64BIT, the argument pointer is left to point at the + argument region allocated for the call to call_on_stack. */ +# ifdef CONFIG_64BIT + /* Switch to new stack. We allocate two 128 byte frames. */ + ldo 256(%arg2), %sp + /* Save previous stack pointer and return pointer in frame marker */ + STREG %rp, -144(%sp) + /* Calls always use function descriptor */ + LDREG 16(%arg1), %arg1 + bve,l (%arg1), %rp + STREG %r1, -136(%sp) + LDREG -144(%sp), %rp + bve (%rp) + LDREG -136(%sp), %sp +# else + /* Switch to new stack. We allocate two 64 byte frames. */ + ldo 128(%arg2), %sp + /* Save previous stack pointer and return pointer in frame marker */ + STREG %r1, -68(%sp) + STREG %rp, -84(%sp) + /* Calls use function descriptor if PLABEL bit is set */ + bb,>=,n %arg1, 30, 1f + depwi 0,31,2, %arg1 + LDREG 0(%arg1), %arg1 +1: + be,l 0(%sr4,%arg1), %sr0, %r31 + copy %r31, %rp + LDREG -84(%sp), %rp + bv (%rp) + LDREG -68(%sp), %sp +# endif /* CONFIG_64BIT */ +ENDPROC(call_on_stack) +#endif /* CONFIG_IRQSTACKS */ get_register: /* |