diff options
Diffstat (limited to 'arch/parisc')
| -rw-r--r-- | arch/parisc/include/asm/pgtable.h | 14 | ||||
| -rw-r--r-- | arch/parisc/kernel/entry.S | 61 |
2 files changed, 7 insertions, 68 deletions
diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h index 865f37a8a881..f3c09737e89c 100644 --- a/arch/parisc/include/asm/pgtable.h +++ b/arch/parisc/include/asm/pgtable.h @@ -136,8 +136,7 @@ #define _PAGE_NO_CACHE_BIT 24 /* (0x080) Uncached Page (U bit) */ #define _PAGE_ACCESSED_BIT 23 /* (0x100) Software: Page Accessed */ #define _PAGE_PRESENT_BIT 22 /* (0x200) Software: translation valid */ -#define _PAGE_FLUSH_BIT 21 /* (0x400) Software: translation valid */ - /* for cache flushing only */ +/* bit 21 was formerly the FLUSH bit but is now unused */ #define _PAGE_USER_BIT 20 /* (0x800) Software: User accessible page */ /* N.B. The bits are defined in terms of a 32 bit word above, so the */ @@ -171,7 +170,6 @@ #define _PAGE_NO_CACHE (1 << xlate_pabit(_PAGE_NO_CACHE_BIT)) #define _PAGE_ACCESSED (1 << xlate_pabit(_PAGE_ACCESSED_BIT)) #define _PAGE_PRESENT (1 << xlate_pabit(_PAGE_PRESENT_BIT)) -#define _PAGE_FLUSH (1 << xlate_pabit(_PAGE_FLUSH_BIT)) #define _PAGE_USER (1 << xlate_pabit(_PAGE_USER_BIT)) #define _PAGE_FILE (1 << xlate_pabit(_PAGE_FILE_BIT)) @@ -211,7 +209,6 @@ #define PAGE_KERNEL_RO __pgprot(_PAGE_KERNEL & ~_PAGE_WRITE) #define PAGE_KERNEL_UNC __pgprot(_PAGE_KERNEL | _PAGE_NO_CACHE) #define PAGE_GATEWAY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_GATEWAY| _PAGE_READ) -#define PAGE_FLUSH __pgprot(_PAGE_FLUSH) /* @@ -259,7 +256,7 @@ extern unsigned long *empty_zero_page; #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) -#define pte_none(x) ((pte_val(x) == 0) || (pte_val(x) & _PAGE_FLUSH)) +#define pte_none(x) (pte_val(x) == 0) #define pte_present(x) (pte_val(x) & _PAGE_PRESENT) #define pte_clear(mm,addr,xp) do { pte_val(*(xp)) = 0; } while (0) @@ -442,13 +439,10 @@ struct mm_struct; static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { pte_t old_pte; - pte_t pte; spin_lock(&pa_dbit_lock); - pte = old_pte = *ptep; - pte_val(pte) &= ~_PAGE_PRESENT; - pte_val(pte) |= _PAGE_FLUSH; - set_pte_at(mm,addr,ptep,pte); + old_pte = *ptep; + pte_clear(mm,addr,ptep); spin_unlock(&pa_dbit_lock); return old_pte; diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index e8c119b61fc7..e5477092a5d4 100644 --- a/arch/parisc/kernel/entry.S +++ b/arch/parisc/kernel/entry.S @@ -1206,23 +1206,7 @@ nadtlb_miss_20w: nop nadtlb_check_alias_20w: - do_alias spc,t0,t1,va,pte,prot,nadtlb_check_flush_20w - - idtlbt pte,prot - - rfir - nop - -nadtlb_check_flush_20w: - bb,>=,n pte,_PAGE_FLUSH_BIT,nadtlb_emulate - - /* Insert a "flush only" translation */ - - depdi,z 7,7,3,prot - depdi 1,10,1,prot - - /* Drop prot bits from pte and convert to page addr for idtlbt */ - convert_for_tlb_insert20 pte + do_alias spc,t0,t1,va,pte,prot,nadtlb_emulate idtlbt pte,prot @@ -1286,7 +1270,7 @@ nadtlb_miss_11: nop nadtlb_check_alias_11: - do_alias spc,t0,t1,va,pte,prot,nadtlb_check_flush_11 + do_alias spc,t0,t1,va,pte,prot,nadtlb_emulate idtlba pte,(va) idtlbp prot,(va) @@ -1294,30 +1278,6 @@ nadtlb_check_alias_11: rfir nop -nadtlb_check_flush_11: - bb,>=,n pte,_PAGE_FLUSH_BIT,nadtlb_emulate - - /* Insert a "flush only" translation */ - - zdepi 7,7,3,prot - depi 1,10,1,prot - - /* Get rid of prot bits and convert to page addr for idtlba */ - - depi 0,31,ASM_PFN_PTE_SHIFT,pte - SHRREG pte,(ASM_PFN_PTE_SHIFT-(31-26)),pte - - mfsp %sr1,t0 /* Save sr1 so we can use it in tlb inserts */ - mtsp spc,%sr1 - - idtlba pte,(%sr1,va) - idtlbp prot,(%sr1,va) - - mtsp t0, %sr1 /* Restore sr1 */ - - rfir - nop - dtlb_miss_20: space_adjust spc,va,t0 get_pgd spc,ptp @@ -1363,28 +1323,13 @@ nadtlb_miss_20: nop nadtlb_check_alias_20: - do_alias spc,t0,t1,va,pte,prot,nadtlb_check_flush_20 + do_alias spc,t0,t1,va,pte,prot,nadtlb_emulate idtlbt pte,prot rfir nop -nadtlb_check_flush_20: - bb,>=,n pte,_PAGE_FLUSH_BIT,nadtlb_emulate - - /* Insert a "flush only" translation */ - - depdi,z 7,7,3,prot - depdi 1,10,1,prot - - /* Drop prot bits from pte and convert to page addr for idtlbt */ - convert_for_tlb_insert20 pte - - idtlbt pte,prot - - rfir - nop #endif nadtlb_emulate: |