diff options
Diffstat (limited to 'arch/m68k/include/asm/sun3_pgtable.h')
| -rw-r--r-- | arch/m68k/include/asm/sun3_pgtable.h | 118 |
1 files changed, 46 insertions, 72 deletions
diff --git a/arch/m68k/include/asm/sun3_pgtable.h b/arch/m68k/include/asm/sun3_pgtable.h index d5104a7b5388..80ca185a18a1 100644 --- a/arch/m68k/include/asm/sun3_pgtable.h +++ b/arch/m68k/include/asm/sun3_pgtable.h @@ -1,9 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _SUN3_PGTABLE_H #define _SUN3_PGTABLE_H #include <asm/sun3mmu.h> -#ifndef __ASSEMBLY__ +#ifndef __ASSEMBLER__ #include <asm/virtconvert.h> #include <linux/linkage.h> @@ -18,7 +19,7 @@ #define PTOV(addr) __va(addr) -#endif /* !__ASSEMBLY__ */ +#endif /* !__ASSEMBLER__ */ /* These need to be defined for compatibility although the sun3 doesn't use them */ #define _PAGE_NOCACHE030 0x040 @@ -65,41 +66,15 @@ | SUN3_PAGE_SYSTEM \ | SUN3_PAGE_NOCACHE) -/* - * Page protections for initialising protection_map. The sun3 has only two - * protection settings, valid (implying read and execute) and writeable. These - * are as close as we can get... - */ -#define __P000 PAGE_NONE -#define __P001 PAGE_READONLY -#define __P010 PAGE_COPY -#define __P011 PAGE_COPY -#define __P100 PAGE_READONLY -#define __P101 PAGE_READONLY -#define __P110 PAGE_COPY -#define __P111 PAGE_COPY - -#define __S000 PAGE_NONE -#define __S001 PAGE_READONLY -#define __S010 PAGE_SHARED -#define __S011 PAGE_SHARED -#define __S100 PAGE_READONLY -#define __S101 PAGE_READONLY -#define __S110 PAGE_SHARED -#define __S111 PAGE_SHARED - /* Use these fake page-protections on PMDs. */ #define SUN3_PMD_VALID (0x00000001) #define SUN3_PMD_MASK (0x0000003F) #define SUN3_PMD_MAGIC (0x0000002B) -#ifndef __ASSEMBLY__ +/* We borrow bit 6 to store the exclusive marker in swap PTEs. */ +#define _PAGE_SWP_EXCLUSIVE 0x040 -/* - * Conversion functions: convert a page and protection to a page entry, - * and a page entry and page directory to the page they refer to. - */ -#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) +#ifndef __ASSEMBLER__ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) { @@ -109,16 +84,14 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) #define pmd_set(pmdp,ptep) do {} while (0) -static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp) +#define __pte_page(pte) \ +(__va ((pte_val (pte) & SUN3_PAGE_PGNUM_MASK) << PAGE_SHIFT)) + +static inline unsigned long pmd_page_vaddr(pmd_t pmd) { - pgd_val(*pgdp) = virt_to_phys(pmdp); + return (unsigned long)__va(pmd_val(pmd) & PAGE_MASK); } -#define __pte_page(pte) \ -((unsigned long) __va ((pte_val (pte) & SUN3_PAGE_PGNUM_MASK) << PAGE_SHIFT)) -#define __pmd_page(pmd) \ -((unsigned long) __va (pmd_val (pmd) & PAGE_MASK)) - static inline int pte_none (pte_t pte) { return !pte_val (pte); } static inline int pte_present (pte_t pte) { return pte_val (pte) & SUN3_PAGE_VALID; } static inline void pte_clear (struct mm_struct *mm, unsigned long addr, pte_t *ptep) @@ -126,12 +99,14 @@ static inline void pte_clear (struct mm_struct *mm, unsigned long addr, pte_t *p pte_val (*ptep) = 0; } +#define PFN_PTE_SHIFT 0 #define pte_pfn(pte) (pte_val(pte) & SUN3_PAGE_PGNUM_MASK) #define pfn_pte(pfn, pgprot) \ ({ pte_t __pte; pte_val(__pte) = pfn | pgprot_val(pgprot); __pte; }) #define pte_page(pte) virt_to_page(__pte_page(pte)) -#define pmd_page(pmd) virt_to_page(__pmd_page(pmd)) +#define pmd_pfn(pmd) (pmd_val(pmd) >> PAGE_SHIFT) +#define pmd_page(pmd) virt_to_page((void *)pmd_page_vaddr(pmd)) static inline int pmd_none2 (pmd_t *pmd) { return !pmd_val (*pmd); } @@ -144,16 +119,9 @@ static inline int pmd_present2 (pmd_t *pmd) { return pmd_val (*pmd) & SUN3_PMD_V #define pmd_present(pmd) (!pmd_none2(&(pmd))) static inline void pmd_clear (pmd_t *pmdp) { pmd_val (*pmdp) = 0; } -static inline int pgd_none (pgd_t pgd) { return 0; } -static inline int pgd_bad (pgd_t pgd) { return 0; } -static inline int pgd_present (pgd_t pgd) { return 1; } -static inline void pgd_clear (pgd_t *pgdp) {} - #define pte_ERROR(e) \ pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) -#define pmd_ERROR(e) \ - pr_err("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e)) #define pgd_ERROR(e) \ pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) @@ -166,12 +134,11 @@ static inline void pgd_clear (pgd_t *pgdp) {} static inline int pte_write(pte_t pte) { return pte_val(pte) & SUN3_PAGE_WRITEABLE; } static inline int pte_dirty(pte_t pte) { return pte_val(pte) & SUN3_PAGE_MODIFIED; } static inline int pte_young(pte_t pte) { return pte_val(pte) & SUN3_PAGE_ACCESSED; } -static inline int pte_special(pte_t pte) { return 0; } static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_WRITEABLE; return pte; } static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_MODIFIED; return pte; } static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_ACCESSED; return pte; } -static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= SUN3_PAGE_WRITEABLE; return pte; } +static inline pte_t pte_mkwrite_novma(pte_t pte){ pte_val(pte) |= SUN3_PAGE_WRITEABLE; return pte; } static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= SUN3_PAGE_MODIFIED; return pte; } static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= SUN3_PAGE_ACCESSED; return pte; } static inline pte_t pte_mknocache(pte_t pte) { pte_val(pte) |= SUN3_PAGE_NOCACHE; return pte; } @@ -179,38 +146,45 @@ static inline pte_t pte_mknocache(pte_t pte) { pte_val(pte) |= SUN3_PAGE_NOCACHE //static inline pte_t pte_mkcache(pte_t pte) { pte_val(pte) &= SUN3_PAGE_NOCACHE; return pte; } // until then, use: static inline pte_t pte_mkcache(pte_t pte) { return pte; } -static inline pte_t pte_mkspecial(pte_t pte) { return pte; } extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; extern pgd_t kernel_pg_dir[PTRS_PER_PGD]; -/* Find an entry in a pagetable directory. */ -#define pgd_index(address) ((address) >> PGDIR_SHIFT) - -#define pgd_offset(mm, address) \ -((mm)->pgd + pgd_index(address)) - -/* Find an entry in a kernel pagetable directory. */ -#define pgd_offset_k(address) pgd_offset(&init_mm, address) +/* + * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that + * are !pte_none() && !pte_present(). + * + * Format of swap PTEs: + * + * 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 + * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * 0 <--------------------- offset ----------------> E <- type --> + * + * E is the exclusive marker that is not stored in swap entries. + */ +#define __swp_type(x) ((x).val & 0x3f) +#define __swp_offset(x) (((x).val) >> 7) +#define __swp_entry(type, offset) ((swp_entry_t) { (((type) & 0x3f) | \ + (((offset) << 7) & ~SUN3_PAGE_VALID)) }) +#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) +#define __swp_entry_to_pte(x) ((pte_t) { (x).val }) -/* Find an entry in the second-level pagetable. */ -static inline pmd_t *pmd_offset (pgd_t *pgd, unsigned long address) +static inline bool pte_swp_exclusive(pte_t pte) { - return (pmd_t *) pgd; + return pte_val(pte) & _PAGE_SWP_EXCLUSIVE; } -/* Find an entry in the third-level pagetable. */ -#define pte_index(address) ((address >> PAGE_SHIFT) & (PTRS_PER_PTE-1)) -#define pte_offset_kernel(pmd, address) ((pte_t *) __pmd_page(*pmd) + pte_index(address)) -#define pte_offset_map(pmd, address) ((pte_t *)page_address(pmd_page(*pmd)) + pte_index(address)) -#define pte_unmap(pte) do { } while (0) +static inline pte_t pte_swp_mkexclusive(pte_t pte) +{ + pte_val(pte) |= _PAGE_SWP_EXCLUSIVE; + return pte; +} -/* Macros to (de)construct the fake PTEs representing swap pages. */ -#define __swp_type(x) ((x).val & 0x7F) -#define __swp_offset(x) (((x).val) >> 7) -#define __swp_entry(type,offset) ((swp_entry_t) { ((type) | ((offset) << 7)) }) -#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) -#define __swp_entry_to_pte(x) ((pte_t) { (x).val }) +static inline pte_t pte_swp_clear_exclusive(pte_t pte) +{ + pte_val(pte) &= ~_PAGE_SWP_EXCLUSIVE; + return pte; +} -#endif /* !__ASSEMBLY__ */ +#endif /* !__ASSEMBLER__ */ #endif /* !_SUN3_PGTABLE_H */ |