diff options
Diffstat (limited to 'arch/parisc/kernel/entry.S')
| -rw-r--r-- | arch/parisc/kernel/entry.S | 118 |
1 files changed, 54 insertions, 64 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index e95207c0565e..242c5ab65611 100644 --- a/arch/parisc/kernel/entry.S +++ b/arch/parisc/kernel/entry.S @@ -36,6 +36,7 @@ #include <asm/signal.h> #include <asm/unistd.h> #include <asm/ldcw.h> +#include <asm/traps.h> #include <asm/thread_info.h> #include <linux/linkage.h> @@ -482,6 +483,8 @@ .macro tlb_unlock0 spc,tmp #ifdef CONFIG_SMP or,COND(=) %r0,\spc,%r0 + sync + or,COND(=) %r0,\spc,%r0 stw \spc,0(\tmp) #endif .endm @@ -690,7 +693,7 @@ ENTRY(fault_vector_20) def 3 extint 4 def 5 - itlb_20 6 + itlb_20 PARISC_ITLB_TRAP def 7 def 8 def 9 @@ -733,7 +736,7 @@ ENTRY(fault_vector_11) def 3 extint 4 def 5 - itlb_11 6 + itlb_11 PARISC_ITLB_TRAP def 7 def 8 def 9 @@ -764,7 +767,6 @@ END(fault_vector_11) #endif /* Fault vector is separately protected and *must* be on its own page */ .align PAGE_SIZE -ENTRY(end_fault_vector) .import handle_interruption,code .import do_cpu_irq_mask,code @@ -775,8 +777,7 @@ ENTRY(end_fault_vector) * copy_thread moved args into task save area. */ -ENTRY_CFI(ret_from_kernel_thread) - +ENTRY(ret_from_kernel_thread) /* Call schedule_tail first though */ BL schedule_tail, %r2 nop @@ -791,7 +792,7 @@ ENTRY_CFI(ret_from_kernel_thread) copy %r31, %r2 b finish_child_return nop -ENDPROC_CFI(ret_from_kernel_thread) +END(ret_from_kernel_thread) /* @@ -816,7 +817,7 @@ ENTRY_CFI(_switch_to) bv %r0(%r2) mtctl %r25,%cr30 -_switch_to_ret: +ENTRY(_switch_to_ret) mtctl %r0, %cr0 /* Needed for single stepping */ callee_rest callee_rest_float @@ -886,7 +887,7 @@ ENTRY_CFI(syscall_exit_rfi) STREG %r19,PT_SR6(%r16) STREG %r19,PT_SR7(%r16) -intr_return: +ENTRY(intr_return) /* check for reschedule */ mfctl %cr30,%r1 LDREG TI_FLAGS(%r1),%r19 /* sched.h: TIF_NEED_RESCHED */ @@ -1066,21 +1067,12 @@ ENTRY_CFI(intr_save) /* for os_hpmc */ save_specials %r29 /* If this trap is a itlb miss, skip saving/adjusting isr/ior */ - - /* - * FIXME: 1) Use a #define for the hardwired "6" below (and in - * traps.c. - * 2) Once we start executing code above 4 Gb, we need - * to adjust iasq/iaoq here in the same way we - * adjust isr/ior below. - */ - - cmpib,COND(=),n 6,%r26,skip_save_ior + cmpib,COND(=),n PARISC_ITLB_TRAP,%r26,skip_save_ior - mfctl %cr20, %r16 /* isr */ + mfctl %isr, %r16 nop /* serialize mfctl on PA 2.0 to avoid 4 cycle penalty */ - mfctl %cr21, %r17 /* ior */ + mfctl %ior, %r17 #ifdef CONFIG_64BIT @@ -1092,22 +1084,34 @@ ENTRY_CFI(intr_save) /* for os_hpmc */ extrd,u,*<> %r8,PSW_W_BIT,1,%r0 depdi 0,1,2,%r17 - /* - * FIXME: This code has hardwired assumptions about the split - * between space bits and offset bits. This will change - * when we allow alternate page sizes. - */ - - /* adjust isr/ior. */ - extrd,u %r16,63,SPACEID_SHIFT,%r1 /* get high bits from isr for ior */ - depd %r1,31,SPACEID_SHIFT,%r17 /* deposit them into ior */ - depdi 0,63,SPACEID_SHIFT,%r16 /* clear them from isr */ + /* adjust isr/ior: get high bits from isr and deposit in ior */ + space_adjust %r16,%r17,%r1 #endif STREG %r16, PT_ISR(%r29) STREG %r17, PT_IOR(%r29) +#if 0 && defined(CONFIG_64BIT) + /* Revisit when we have 64-bit code above 4Gb */ + b,n intr_save2 skip_save_ior: + /* We have a itlb miss, and when executing code above 4 Gb on ILP64, we + * need to adjust iasq/iaoq here in the same way we adjusted isr/ior + * above. + */ + extrd,u,* %r8,PSW_W_BIT,1,%r1 + cmpib,COND(=),n 1,%r1,intr_save2 + LDREG PT_IASQ0(%r29), %r16 + LDREG PT_IAOQ0(%r29), %r17 + /* adjust iasq/iaoq */ + space_adjust %r16,%r17,%r1 + STREG %r16, PT_IASQ0(%r29) + STREG %r17, PT_IAOQ0(%r29) +#else +skip_save_ior: +#endif + +intr_save2: virt_map save_general %r29 @@ -1745,7 +1749,7 @@ fork_like fork fork_like vfork /* Set the return value for the child */ -ENTRY_CFI(child_return) +ENTRY(child_return) BL schedule_tail, %r2 nop finish_child_return: @@ -1757,7 +1761,7 @@ finish_child_return: reg_restore %r1 b syscall_exit copy %r0,%r28 -ENDPROC_CFI(child_return) +END(child_return) ENTRY_CFI(sys_rt_sigreturn_wrapper) LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r26 @@ -1789,7 +1793,7 @@ ENTRY_CFI(sys_rt_sigreturn_wrapper) LDREG PT_GR28(%r1),%r28 /* reload original r28 for syscall_exit */ ENDPROC_CFI(sys_rt_sigreturn_wrapper) -ENTRY_CFI(syscall_exit) +ENTRY(syscall_exit) /* NOTE: Not all syscalls exit this way. rt_sigreturn will exit * via syscall_exit_rfi if the signal was received while the process * was running. @@ -1988,21 +1992,16 @@ syscall_do_resched: #else nop #endif -ENDPROC_CFI(syscall_exit) +END(syscall_exit) #ifdef CONFIG_FUNCTION_TRACER .import ftrace_function_trampoline,code .align L1_CACHE_BYTES - .globl mcount - .type mcount, @function -ENTRY(mcount) +ENTRY_CFI(mcount, caller) _mcount: .export _mcount,data - .proc - .callinfo caller,frame=0 - .entry /* * The 64bit mcount() function pointer needs 4 dwords, of which the * first two are free. We optimize it here and put 2 instructions for @@ -2024,18 +2023,11 @@ ftrace_stub: .dword mcount .dword 0 /* code in head.S puts value of global gp here */ #endif - .exit - .procend -ENDPROC(mcount) +ENDPROC_CFI(mcount) #ifdef CONFIG_FUNCTION_GRAPH_TRACER .align 8 - .globl return_to_handler - .type return_to_handler, @function -ENTRY_CFI(return_to_handler) - .proc - .callinfo caller,frame=FRAME_SIZE - .entry +ENTRY_CFI(return_to_handler, caller,frame=FRAME_SIZE) .export parisc_return_to_handler,data parisc_return_to_handler: copy %r3,%r1 @@ -2074,8 +2066,6 @@ parisc_return_to_handler: bv %r0(%rp) #endif LDREGM -FRAME_SIZE(%sp),%r3 - .exit - .procend ENDPROC_CFI(return_to_handler) #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ @@ -2085,31 +2075,31 @@ ENDPROC_CFI(return_to_handler) #ifdef CONFIG_IRQSTACKS /* void call_on_stack(unsigned long param1, void *func, unsigned long new_stack) */ -ENTRY_CFI(call_on_stack) +ENTRY_CFI(call_on_stack, FRAME=2*FRAME_SIZE,CALLS,SAVE_RP,SAVE_SP) +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. */ + + /* Switch to new stack. We allocate two frames. */ + ldo 2*FRAME_SIZE(%arg2), %sp # 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) + STREG %rp, -FRAME_SIZE-RP_OFFSET(%sp) /* Calls always use function descriptor */ LDREG 16(%arg1), %arg1 bve,l (%arg1), %rp - STREG %r1, -136(%sp) - LDREG -144(%sp), %rp + STREG %r1, -FRAME_SIZE-REG_SZ(%sp) + LDREG -FRAME_SIZE-RP_OFFSET(%sp), %rp bve (%rp) - LDREG -136(%sp), %sp + LDREG -FRAME_SIZE-REG_SZ(%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) + STREG %r1, -FRAME_SIZE-REG_SZ(%sp) + STREG %rp, -FRAME_SIZE-RP_OFFSET(%sp) /* Calls use function descriptor if PLABEL bit is set */ bb,>=,n %arg1, 30, 1f depwi 0,31,2, %arg1 @@ -2117,9 +2107,9 @@ ENTRY_CFI(call_on_stack) 1: be,l 0(%sr4,%arg1), %sr0, %r31 copy %r31, %rp - LDREG -84(%sp), %rp + LDREG -FRAME_SIZE-RP_OFFSET(%sp), %rp bv (%rp) - LDREG -68(%sp), %sp + LDREG -FRAME_SIZE-REG_SZ(%sp), %sp # endif /* CONFIG_64BIT */ ENDPROC_CFI(call_on_stack) #endif /* CONFIG_IRQSTACKS */ |