diff options
Diffstat (limited to 'arch/parisc/kernel/entry.S')
| -rw-r--r-- | arch/parisc/kernel/entry.S | 39 |
1 files changed, 20 insertions, 19 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index 242c5ab656113..d5eb19efa65be 100644 --- a/arch/parisc/kernel/entry.S +++ b/arch/parisc/kernel/entry.S @@ -38,6 +38,7 @@ #include <asm/ldcw.h> #include <asm/traps.h> #include <asm/thread_info.h> +#include <asm/alternative.h> #include <linux/linkage.h> @@ -186,7 +187,7 @@ bv,n 0(%r3) nop .word 0 /* checksum (will be patched) */ - .word PA(os_hpmc) /* address of handler */ + .word 0 /* address of handler */ .word 0 /* length of handler */ .endm @@ -393,6 +394,7 @@ */ .macro space_check spc,tmp,fault mfsp %sr7,\tmp + /* check against %r0 which is same value as LINUX_GATEWAY_SPACE */ or,COND(<>) %r0,\spc,%r0 /* user may execute gateway page * as kernel, so defeat the space * check if it is */ @@ -426,13 +428,10 @@ ldw,s \index(\pmd),\pmd bb,>=,n \pmd,_PxD_PRESENT_BIT,\fault dep %r0,31,PxD_FLAG_SHIFT,\pmd /* clear flags */ - copy \pmd,%r9 - SHLREG %r9,PxD_VALUE_SHIFT,\pmd + SHLREG \pmd,PxD_VALUE_SHIFT,\pmd extru \va,31-PAGE_SHIFT,ASM_BITS_PER_PTE,\index dep %r0,31,PAGE_SHIFT,\pmd /* clear offset */ shladd \index,BITS_PER_PTE_ENTRY,\pmd,\pmd /* pmd is now pte */ - LDREG %r0(\pmd),\pte - bb,>=,n \pte,_PAGE_PRESENT_BIT,\fault .endm /* Look up PTE in a 3-Level scheme. @@ -448,7 +447,6 @@ .macro L3_ptep pgd,pte,index,va,fault #if CONFIG_PGTABLE_LEVELS == 3 /* we might have a 2-Level scheme, e.g. with 16kb page size */ extrd,u \va,63-ASM_PGDIR_SHIFT,ASM_BITS_PER_PGD,\index - copy %r0,\pte extrd,u,*= \va,63-ASM_PGDIR_SHIFT,64-ASM_PGDIR_SHIFT,%r0 ldw,s \index(\pgd),\pgd extrd,u,*= \va,63-ASM_PGDIR_SHIFT,64-ASM_PGDIR_SHIFT,%r0 @@ -463,36 +461,39 @@ L2_ptep \pgd,\pte,\index,\va,\fault .endm - /* Acquire pa_tlb_lock lock and recheck page is still present. */ + /* Acquire pa_tlb_lock lock and check page is present. */ .macro tlb_lock spc,ptp,pte,tmp,tmp1,fault #ifdef CONFIG_SMP - cmpib,COND(=),n 0,\spc,2f +98: cmpib,COND(=),n 0,\spc,2f load_pa_tlb_lock \tmp 1: LDCW 0(\tmp),\tmp1 cmpib,COND(=) 0,\tmp1,1b nop LDREG 0(\ptp),\pte - bb,<,n \pte,_PAGE_PRESENT_BIT,2f + bb,<,n \pte,_PAGE_PRESENT_BIT,3f b \fault - stw \spc,0(\tmp) -2: + stw,ma \spc,0(\tmp) +99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) #endif +2: LDREG 0(\ptp),\pte + bb,>=,n \pte,_PAGE_PRESENT_BIT,\fault +3: .endm /* Release pa_tlb_lock lock without reloading lock address. */ .macro tlb_unlock0 spc,tmp #ifdef CONFIG_SMP - or,COND(=) %r0,\spc,%r0 - sync - or,COND(=) %r0,\spc,%r0 - stw \spc,0(\tmp) +98: or,COND(=) %r0,\spc,%r0 + stw,ma \spc,0(\tmp) +99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) #endif .endm /* Release pa_tlb_lock lock. */ .macro tlb_unlock1 spc,tmp #ifdef CONFIG_SMP - load_pa_tlb_lock \tmp +98: load_pa_tlb_lock \tmp +99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) tlb_unlock0 \spc,\tmp #endif .endm @@ -910,9 +911,9 @@ intr_check_sig: * Only do signals if we are returning to user space */ LDREG PT_IASQ0(%r16), %r20 - cmpib,COND(=),n 0,%r20,intr_restore /* backward */ + cmpib,COND(=),n LINUX_GATEWAY_SPACE, %r20, intr_restore /* backward */ LDREG PT_IASQ1(%r16), %r20 - cmpib,COND(=),n 0,%r20,intr_restore /* backward */ + cmpib,COND(=),n LINUX_GATEWAY_SPACE, %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 @@ -1658,7 +1659,7 @@ dbit_fault: itlb_fault: b intr_save - ldi 6,%r8 + ldi PARISC_ITLB_TRAP,%r8 nadtlb_fault: b intr_save |