| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _MCF_PGTABLE_H |
| #define _MCF_PGTABLE_H |
| |
| #include <asm/mcfmmu.h> |
| #include <asm/page.h> |
| |
| /* |
| * MMUDR bits, in proper place. We write these directly into the MMUDR |
| * after masking from the pte. |
| */ |
| #define CF_PAGE_LOCKED MMUDR_LK /* 0x00000002 */ |
| #define CF_PAGE_EXEC MMUDR_X /* 0x00000004 */ |
| #define CF_PAGE_WRITABLE MMUDR_W /* 0x00000008 */ |
| #define CF_PAGE_READABLE MMUDR_R /* 0x00000010 */ |
| #define CF_PAGE_SYSTEM MMUDR_SP /* 0x00000020 */ |
| #define CF_PAGE_COPYBACK MMUDR_CM_CCB /* 0x00000040 */ |
| #define CF_PAGE_NOCACHE MMUDR_CM_NCP /* 0x00000080 */ |
| |
| #define CF_CACHEMASK (~MMUDR_CM_CCB) |
| #define CF_PAGE_MMUDR_MASK 0x000000fe |
| |
| #define _PAGE_NOCACHE030 CF_PAGE_NOCACHE |
| |
| /* |
| * MMUTR bits, need shifting down. |
| */ |
| #define CF_PAGE_MMUTR_MASK 0x00000c00 |
| #define CF_PAGE_MMUTR_SHIFT 10 |
| |
| #define CF_PAGE_VALID (MMUTR_V << CF_PAGE_MMUTR_SHIFT) |
| #define CF_PAGE_SHARED (MMUTR_SG << CF_PAGE_MMUTR_SHIFT) |
| |
| /* |
| * Fake bits, not implemented in CF, will get masked out before |
| * hitting hardware. |
| */ |
| #define CF_PAGE_DIRTY 0x00000001 |
| #define CF_PAGE_ACCESSED 0x00001000 |
| |
| #define _PAGE_CACHE040 0x020 /* 68040 cache mode, cachable, copyback */ |
| #define _PAGE_NOCACHE_S 0x040 /* 68040 no-cache mode, serialized */ |
| #define _PAGE_NOCACHE 0x060 /* 68040 cache mode, non-serialized */ |
| #define _PAGE_CACHE040W 0x000 /* 68040 cache mode, cachable, write-through */ |
| #define _DESCTYPE_MASK 0x003 |
| #define _CACHEMASK040 (~0x060) |
| #define _PAGE_GLOBAL040 0x400 /* 68040 global bit, used for kva descs */ |
| |
| /* |
| * Externally used page protection values. |
| */ |
| #define _PAGE_PRESENT (CF_PAGE_VALID) |
| #define _PAGE_ACCESSED (CF_PAGE_ACCESSED) |
| #define _PAGE_DIRTY (CF_PAGE_DIRTY) |
| #define _PAGE_READWRITE (CF_PAGE_READABLE \ |
| | CF_PAGE_WRITABLE \ |
| | CF_PAGE_SYSTEM \ |
| | CF_PAGE_SHARED) |
| |
| /* |
| * Compound page protection values. |
| */ |
| #define PAGE_NONE __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED) |
| |
| #define PAGE_SHARED __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_SHARED) |
| |
| #define PAGE_INIT __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_READABLE \ |
| | CF_PAGE_WRITABLE \ |
| | CF_PAGE_EXEC \ |
| | CF_PAGE_SYSTEM) |
| |
| #define PAGE_KERNEL __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_READABLE \ |
| | CF_PAGE_WRITABLE \ |
| | CF_PAGE_EXEC \ |
| | CF_PAGE_SYSTEM \ |
| | CF_PAGE_SHARED) |
| |
| #define PAGE_COPY __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_READABLE \ |
| | CF_PAGE_DIRTY) |
| |
| /* |
| * Page protections for initialising protection_map. See mm/mmap.c |
| * for use. In general, the bit positions are xwr, and P-items are |
| * private, the S-items are shared. |
| */ |
| #define __P000 PAGE_NONE |
| #define __P001 __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_READABLE) |
| #define __P010 __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_WRITABLE) |
| #define __P011 __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_READABLE \ |
| | CF_PAGE_WRITABLE) |
| #define __P100 __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_EXEC) |
| #define __P101 __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_READABLE \ |
| | CF_PAGE_EXEC) |
| #define __P110 __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_WRITABLE \ |
| | CF_PAGE_EXEC) |
| #define __P111 __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_READABLE \ |
| | CF_PAGE_WRITABLE \ |
| | CF_PAGE_EXEC) |
| |
| #define __S000 PAGE_NONE |
| #define __S001 __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_READABLE) |
| #define __S010 PAGE_SHARED |
| #define __S011 __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_SHARED \ |
| | CF_PAGE_READABLE) |
| #define __S100 __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_EXEC) |
| #define __S101 __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_READABLE \ |
| | CF_PAGE_EXEC) |
| #define __S110 __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_SHARED \ |
| | CF_PAGE_EXEC) |
| #define __S111 __pgprot(CF_PAGE_VALID \ |
| | CF_PAGE_ACCESSED \ |
| | CF_PAGE_SHARED \ |
| | CF_PAGE_READABLE \ |
| | CF_PAGE_EXEC) |
| |
| #define PTE_MASK PAGE_MASK |
| #define CF_PAGE_CHG_MASK (PTE_MASK | CF_PAGE_ACCESSED | CF_PAGE_DIRTY) |
| |
| #ifndef __ASSEMBLY__ |
| |
| /* |
| * 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)) |
| |
| static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| { |
| pte_val(pte) = (pte_val(pte) & CF_PAGE_CHG_MASK) | pgprot_val(newprot); |
| return pte; |
| } |
| |
| #define pmd_set(pmdp, ptep) do {} while (0) |
| |
| static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp) |
| { |
| pgd_val(*pgdp) = virt_to_phys(pmdp); |
| } |
| |
| #define __pte_page(pte) ((unsigned long) (pte_val(pte) & PAGE_MASK)) |
| #define __pmd_page(pmd) ((unsigned long) (pmd_val(pmd))) |
| |
| static inline int pte_none(pte_t pte) |
| { |
| return !pte_val(pte); |
| } |
| |
| static inline int pte_present(pte_t pte) |
| { |
| return pte_val(pte) & CF_PAGE_VALID; |
| } |
| |
| static inline void pte_clear(struct mm_struct *mm, unsigned long addr, |
| pte_t *ptep) |
| { |
| pte_val(*ptep) = 0; |
| } |
| |
| #define pte_pagenr(pte) ((__pte_page(pte) - PAGE_OFFSET) >> PAGE_SHIFT) |
| #define pte_page(pte) virt_to_page(__pte_page(pte)) |
| |
| static inline int pmd_none2(pmd_t *pmd) { return !pmd_val(*pmd); } |
| #define pmd_none(pmd) pmd_none2(&(pmd)) |
| static inline int pmd_bad2(pmd_t *pmd) { return 0; } |
| #define pmd_bad(pmd) pmd_bad2(&(pmd)) |
| #define pmd_present(pmd) (!pmd_none2(&(pmd))) |
| static inline void pmd_clear(pmd_t *pmdp) { pmd_val(*pmdp) = 0; } |
| |
| #define pte_ERROR(e) \ |
| printk(KERN_ERR "%s:%d: bad pte %08lx.\n", \ |
| __FILE__, __LINE__, pte_val(e)) |
| #define pgd_ERROR(e) \ |
| printk(KERN_ERR "%s:%d: bad pgd %08lx.\n", \ |
| __FILE__, __LINE__, pgd_val(e)) |
| |
| /* |
| * The following only work if pte_present() is true. |
| * Undefined behaviour if not... |
| * [we have the full set here even if they don't change from m68k] |
| */ |
| static inline int pte_read(pte_t pte) |
| { |
| return pte_val(pte) & CF_PAGE_READABLE; |
| } |
| |
| static inline int pte_write(pte_t pte) |
| { |
| return pte_val(pte) & CF_PAGE_WRITABLE; |
| } |
| |
| static inline int pte_exec(pte_t pte) |
| { |
| return pte_val(pte) & CF_PAGE_EXEC; |
| } |
| |
| static inline int pte_dirty(pte_t pte) |
| { |
| return pte_val(pte) & CF_PAGE_DIRTY; |
| } |
| |
| static inline int pte_young(pte_t pte) |
| { |
| return pte_val(pte) & CF_PAGE_ACCESSED; |
| } |
| |
| static inline int pte_special(pte_t pte) |
| { |
| return 0; |
| } |
| |
| static inline pte_t pte_wrprotect(pte_t pte) |
| { |
| pte_val(pte) &= ~CF_PAGE_WRITABLE; |
| return pte; |
| } |
| |
| static inline pte_t pte_rdprotect(pte_t pte) |
| { |
| pte_val(pte) &= ~CF_PAGE_READABLE; |
| return pte; |
| } |
| |
| static inline pte_t pte_exprotect(pte_t pte) |
| { |
| pte_val(pte) &= ~CF_PAGE_EXEC; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkclean(pte_t pte) |
| { |
| pte_val(pte) &= ~CF_PAGE_DIRTY; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkold(pte_t pte) |
| { |
| pte_val(pte) &= ~CF_PAGE_ACCESSED; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkwrite(pte_t pte) |
| { |
| pte_val(pte) |= CF_PAGE_WRITABLE; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkread(pte_t pte) |
| { |
| pte_val(pte) |= CF_PAGE_READABLE; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkexec(pte_t pte) |
| { |
| pte_val(pte) |= CF_PAGE_EXEC; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkdirty(pte_t pte) |
| { |
| pte_val(pte) |= CF_PAGE_DIRTY; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkyoung(pte_t pte) |
| { |
| pte_val(pte) |= CF_PAGE_ACCESSED; |
| return pte; |
| } |
| |
| static inline pte_t pte_mknocache(pte_t pte) |
| { |
| pte_val(pte) |= 0x80 | (pte_val(pte) & ~0x40); |
| return pte; |
| } |
| |
| static inline pte_t pte_mkcache(pte_t pte) |
| { |
| pte_val(pte) &= ~CF_PAGE_NOCACHE; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkspecial(pte_t pte) |
| { |
| return pte; |
| } |
| |
| #define swapper_pg_dir kernel_pg_dir |
| 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) |
| |
| /* |
| * Find an entry in the third-level pagetable. |
| */ |
| #define __pte_offset(address) ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) |
| #define pte_offset_kernel(dir, address) \ |
| ((pte_t *) __pmd_page(*(dir)) + __pte_offset(address)) |
| |
| /* |
| * Disable caching for page at given kernel virtual address. |
| */ |
| static inline void nocache_page(void *vaddr) |
| { |
| pgd_t *dir; |
| p4d_t *p4dp; |
| pud_t *pudp; |
| pmd_t *pmdp; |
| pte_t *ptep; |
| unsigned long addr = (unsigned long) vaddr; |
| |
| dir = pgd_offset_k(addr); |
| p4dp = p4d_offset(dir, addr); |
| pudp = pud_offset(p4dp, addr); |
| pmdp = pmd_offset(pudp, addr); |
| ptep = pte_offset_kernel(pmdp, addr); |
| *ptep = pte_mknocache(*ptep); |
| } |
| |
| /* |
| * Enable caching for page at given kernel virtual address. |
| */ |
| static inline void cache_page(void *vaddr) |
| { |
| pgd_t *dir; |
| p4d_t *p4dp; |
| pud_t *pudp; |
| pmd_t *pmdp; |
| pte_t *ptep; |
| unsigned long addr = (unsigned long) vaddr; |
| |
| dir = pgd_offset_k(addr); |
| p4dp = p4d_offset(dir, addr); |
| pudp = pud_offset(p4dp, addr); |
| pmdp = pmd_offset(pudp, addr); |
| ptep = pte_offset_kernel(pmdp, addr); |
| *ptep = pte_mkcache(*ptep); |
| } |
| |
| /* |
| * Encode and de-code a swap entry (must be !pte_none(e) && !pte_present(e)) |
| */ |
| #define __swp_type(x) ((x).val & 0xFF) |
| #define __swp_offset(x) ((x).val >> 11) |
| #define __swp_entry(typ, off) ((swp_entry_t) { (typ) | \ |
| (off << 11) }) |
| #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) |
| #define __swp_entry_to_pte(x) (__pte((x).val)) |
| |
| #define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)) |
| |
| #define pte_offset_map(pmdp, addr) ((pte_t *)__pmd_page(*pmdp) + \ |
| __pte_offset(addr)) |
| #define pte_unmap(pte) ((void) 0) |
| #define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) |
| #define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT) |
| |
| #endif /* !__ASSEMBLY__ */ |
| #endif /* _MCF_PGTABLE_H */ |