diff options
Diffstat (limited to 'arch/sparc/include')
| -rw-r--r-- | arch/sparc/include/asm/btfixup.h | 1 | ||||
| -rw-r--r-- | arch/sparc/include/asm/pgtable_32.h | 44 |
2 files changed, 38 insertions, 7 deletions
diff --git a/arch/sparc/include/asm/btfixup.h b/arch/sparc/include/asm/btfixup.h index 797722cf69f..48b01414b19 100644 --- a/arch/sparc/include/asm/btfixup.h +++ b/arch/sparc/include/asm/btfixup.h @@ -120,7 +120,6 @@ extern unsigned int ___illegal_use_of_BTFIXUP_INT_in_module(void); #define BTFIXUPCALL_RETO0 0x01000000 /* Return first parameter, actually a nop */ #define BTFIXUPCALL_ANDNINT(i) (0x902a2000|((i) & 0x1fff)) /* Possibly optimize to andn %o0, i, %o0 */ #define BTFIXUPCALL_SWAPO0O1 0xd27a0000 /* Possibly optimize to swap [%o0],%o1 */ -#define BTFIXUPCALL_SWAPO0G0 0xc07a0000 /* Possibly optimize to swap [%o0],%g0 */ #define BTFIXUPCALL_SWAPG1G2 0xc4784000 /* Possibly optimize to swap [%g1],%g2 */ #define BTFIXUPCALL_STG0O0 0xc0220000 /* Possibly optimize to st %g0,[%o0] */ #define BTFIXUPCALL_STO1O0 0xd2220000 /* Possibly optimize to st %o1,[%o0] */ diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h index 227118577a9..144ab311c52 100644 --- a/arch/sparc/include/asm/pgtable_32.h +++ b/arch/sparc/include/asm/pgtable_32.h @@ -119,6 +119,22 @@ extern unsigned long empty_zero_page; #define ZERO_PAGE(vaddr) (virt_to_page(&empty_zero_page)) /* + * In general all page table modifications should use the V8 atomic + * swap instruction. This insures the mmu and the cpu are in sync + * with respect to ref/mod bits in the page tables. + */ +static inline unsigned long srmmu_swap(unsigned long *addr, unsigned long value) +{ + __asm__ __volatile__("swap [%2], %0" : "=&r" (value) : "0" (value), "r" (addr)); + return value; +} + +static inline void srmmu_set_pte(pte_t *ptep, pte_t pteval) +{ + srmmu_swap((unsigned long *)ptep, pte_val(pteval)); +} + +/* */ BTFIXUPDEF_CALL_CONST(struct page *, pmd_page, pmd_t) BTFIXUPDEF_CALL_CONST(unsigned long, pgd_page_vaddr, pgd_t) @@ -127,7 +143,6 @@ BTFIXUPDEF_CALL_CONST(unsigned long, pgd_page_vaddr, pgd_t) #define pgd_page_vaddr(pgd) BTFIXUP_CALL(pgd_page_vaddr)(pgd) BTFIXUPDEF_CALL_CONST(int, pte_present, pte_t) -BTFIXUPDEF_CALL(void, pte_clear, pte_t *) static inline int pte_none(pte_t pte) { @@ -135,11 +150,19 @@ static inline int pte_none(pte_t pte) } #define pte_present(pte) BTFIXUP_CALL(pte_present)(pte) -#define pte_clear(mm,addr,pte) BTFIXUP_CALL(pte_clear)(pte) + +static inline void __pte_clear(pte_t *ptep) +{ + srmmu_set_pte(ptep, __pte(0)); +} + +static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) +{ + __pte_clear(ptep); +} BTFIXUPDEF_CALL_CONST(int, pmd_bad, pmd_t) BTFIXUPDEF_CALL_CONST(int, pmd_present, pmd_t) -BTFIXUPDEF_CALL(void, pmd_clear, pmd_t *) static inline int pmd_none(pmd_t pmd) { @@ -148,17 +171,26 @@ static inline int pmd_none(pmd_t pmd) #define pmd_bad(pmd) BTFIXUP_CALL(pmd_bad)(pmd) #define pmd_present(pmd) BTFIXUP_CALL(pmd_present)(pmd) -#define pmd_clear(pmd) BTFIXUP_CALL(pmd_clear)(pmd) + +static inline void pmd_clear(pmd_t *pmdp) +{ + int i; + for (i = 0; i < PTRS_PER_PTE/SRMMU_REAL_PTRS_PER_PTE; i++) + srmmu_set_pte((pte_t *)&pmdp->pmdv[i], __pte(0)); +} BTFIXUPDEF_CALL_CONST(int, pgd_none, pgd_t) BTFIXUPDEF_CALL_CONST(int, pgd_bad, pgd_t) BTFIXUPDEF_CALL_CONST(int, pgd_present, pgd_t) -BTFIXUPDEF_CALL(void, pgd_clear, pgd_t *) #define pgd_none(pgd) BTFIXUP_CALL(pgd_none)(pgd) #define pgd_bad(pgd) BTFIXUP_CALL(pgd_bad)(pgd) #define pgd_present(pgd) BTFIXUP_CALL(pgd_present)(pgd) -#define pgd_clear(pgd) BTFIXUP_CALL(pgd_clear)(pgd) + +static inline void pgd_clear(pgd_t *pgdp) +{ + srmmu_set_pte((pte_t *)pgdp, __pte(0)); +} /* * The following only work if pte_present() is true. |