| /* |
| * Copyright (C) 2012 ARM Ltd. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| #ifndef __ASM_PGTABLE_H |
| #define __ASM_PGTABLE_H |
| |
| #include <asm/proc-fns.h> |
| |
| #include <asm/memory.h> |
| #include <asm/pgtable-hwdef.h> |
| |
| /* |
| * Software defined PTE bits definition. |
| */ |
| #define PTE_VALID (_AT(pteval_t, 1) << 0) |
| #define PTE_PROT_NONE (_AT(pteval_t, 1) << 1) /* only when !PTE_VALID */ |
| #define PTE_FILE (_AT(pteval_t, 1) << 2) /* only when !pte_present() */ |
| #define PTE_DIRTY (_AT(pteval_t, 1) << 55) |
| #define PTE_SPECIAL (_AT(pteval_t, 1) << 56) |
| |
| /* |
| * VMALLOC and SPARSEMEM_VMEMMAP ranges. |
| */ |
| #define VMALLOC_START UL(0xffffff8000000000) |
| #define VMALLOC_END (PAGE_OFFSET - UL(0x400000000) - SZ_64K) |
| |
| #define vmemmap ((struct page *)(VMALLOC_END + SZ_64K)) |
| |
| #define FIRST_USER_ADDRESS 0 |
| |
| #ifndef __ASSEMBLY__ |
| extern void __pte_error(const char *file, int line, unsigned long val); |
| extern void __pmd_error(const char *file, int line, unsigned long val); |
| extern void __pgd_error(const char *file, int line, unsigned long val); |
| |
| #define pte_ERROR(pte) __pte_error(__FILE__, __LINE__, pte_val(pte)) |
| #ifndef CONFIG_ARM64_64K_PAGES |
| #define pmd_ERROR(pmd) __pmd_error(__FILE__, __LINE__, pmd_val(pmd)) |
| #endif |
| #define pgd_ERROR(pgd) __pgd_error(__FILE__, __LINE__, pgd_val(pgd)) |
| |
| /* |
| * The pgprot_* and protection_map entries will be fixed up at runtime to |
| * include the cachable and bufferable bits based on memory policy, as well as |
| * any architecture dependent bits like global/ASID and SMP shared mapping |
| * bits. |
| */ |
| #define _PAGE_DEFAULT PTE_TYPE_PAGE | PTE_AF |
| |
| extern pgprot_t pgprot_default; |
| |
| #define __pgprot_modify(prot,mask,bits) \ |
| __pgprot((pgprot_val(prot) & ~(mask)) | (bits)) |
| |
| #define _MOD_PROT(p, b) __pgprot_modify(p, 0, b) |
| |
| #define PAGE_NONE __pgprot_modify(pgprot_default, PTE_TYPE_MASK, PTE_PROT_NONE) |
| #define PAGE_SHARED _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_UXN) |
| #define PAGE_SHARED_EXEC _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN) |
| #define PAGE_COPY _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_RDONLY) |
| #define PAGE_COPY_EXEC _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_RDONLY) |
| #define PAGE_READONLY _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_RDONLY) |
| #define PAGE_READONLY_EXEC _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_RDONLY) |
| #define PAGE_KERNEL _MOD_PROT(pgprot_default, PTE_PXN | PTE_UXN | PTE_DIRTY) |
| #define PAGE_KERNEL_EXEC _MOD_PROT(pgprot_default, PTE_UXN | PTE_DIRTY) |
| |
| #define PAGE_HYP _MOD_PROT(pgprot_default, PTE_HYP) |
| #define PAGE_HYP_DEVICE __pgprot(PROT_DEVICE_nGnRE | PTE_HYP) |
| |
| #define PAGE_S2 __pgprot_modify(pgprot_default, PTE_S2_MEMATTR_MASK, PTE_S2_MEMATTR(MT_S2_NORMAL) | PTE_S2_RDONLY) |
| #define PAGE_S2_DEVICE __pgprot(PROT_DEFAULT | PTE_S2_MEMATTR(MT_S2_DEVICE_nGnRE) | PTE_S2_RDWR | PTE_UXN) |
| |
| #define __PAGE_NONE __pgprot(((_PAGE_DEFAULT) & ~PTE_TYPE_MASK) | PTE_PROT_NONE) |
| #define __PAGE_SHARED __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN) |
| #define __PAGE_SHARED_EXEC __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN) |
| #define __PAGE_COPY __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_RDONLY) |
| #define __PAGE_COPY_EXEC __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_RDONLY) |
| #define __PAGE_READONLY __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_RDONLY) |
| #define __PAGE_READONLY_EXEC __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_RDONLY) |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| #define __P000 __PAGE_NONE |
| #define __P001 __PAGE_READONLY |
| #define __P010 __PAGE_COPY |
| #define __P011 __PAGE_COPY |
| #define __P100 __PAGE_READONLY_EXEC |
| #define __P101 __PAGE_READONLY_EXEC |
| #define __P110 __PAGE_COPY_EXEC |
| #define __P111 __PAGE_COPY_EXEC |
| |
| #define __S000 __PAGE_NONE |
| #define __S001 __PAGE_READONLY |
| #define __S010 __PAGE_SHARED |
| #define __S011 __PAGE_SHARED |
| #define __S100 __PAGE_READONLY_EXEC |
| #define __S101 __PAGE_READONLY_EXEC |
| #define __S110 __PAGE_SHARED_EXEC |
| #define __S111 __PAGE_SHARED_EXEC |
| |
| #ifndef __ASSEMBLY__ |
| /* |
| * ZERO_PAGE is a global shared page that is always zero: used |
| * for zero-mapped memory areas etc.. |
| */ |
| extern struct page *empty_zero_page; |
| #define ZERO_PAGE(vaddr) (empty_zero_page) |
| |
| #define pte_pfn(pte) ((pte_val(pte) & PHYS_MASK) >> PAGE_SHIFT) |
| |
| #define pfn_pte(pfn,prot) (__pte(((phys_addr_t)(pfn) << PAGE_SHIFT) | pgprot_val(prot))) |
| |
| #define pte_none(pte) (!pte_val(pte)) |
| #define pte_clear(mm,addr,ptep) set_pte(ptep, __pte(0)) |
| #define pte_page(pte) (pfn_to_page(pte_pfn(pte))) |
| #define pte_offset_kernel(dir,addr) (pmd_page_vaddr(*(dir)) + __pte_index(addr)) |
| |
| #define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr)) |
| #define pte_offset_map_nested(dir,addr) pte_offset_kernel((dir), (addr)) |
| #define pte_unmap(pte) do { } while (0) |
| #define pte_unmap_nested(pte) do { } while (0) |
| |
| /* |
| * The following only work if pte_present(). Undefined behaviour otherwise. |
| */ |
| #define pte_present(pte) (pte_val(pte) & (PTE_VALID | PTE_PROT_NONE)) |
| #define pte_dirty(pte) (pte_val(pte) & PTE_DIRTY) |
| #define pte_young(pte) (pte_val(pte) & PTE_AF) |
| #define pte_special(pte) (pte_val(pte) & PTE_SPECIAL) |
| #define pte_write(pte) (!(pte_val(pte) & PTE_RDONLY)) |
| #define pte_exec(pte) (!(pte_val(pte) & PTE_UXN)) |
| |
| #define pte_valid_user(pte) \ |
| ((pte_val(pte) & (PTE_VALID | PTE_USER)) == (PTE_VALID | PTE_USER)) |
| |
| #define PTE_BIT_FUNC(fn,op) \ |
| static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; } |
| |
| PTE_BIT_FUNC(wrprotect, |= PTE_RDONLY); |
| PTE_BIT_FUNC(mkwrite, &= ~PTE_RDONLY); |
| PTE_BIT_FUNC(mkclean, &= ~PTE_DIRTY); |
| PTE_BIT_FUNC(mkdirty, |= PTE_DIRTY); |
| PTE_BIT_FUNC(mkold, &= ~PTE_AF); |
| PTE_BIT_FUNC(mkyoung, |= PTE_AF); |
| PTE_BIT_FUNC(mkspecial, |= PTE_SPECIAL); |
| |
| static inline void set_pte(pte_t *ptep, pte_t pte) |
| { |
| *ptep = pte; |
| } |
| |
| extern void __sync_icache_dcache(pte_t pteval, unsigned long addr); |
| |
| static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, |
| pte_t *ptep, pte_t pte) |
| { |
| if (pte_valid_user(pte)) { |
| if (pte_exec(pte)) |
| __sync_icache_dcache(pte, addr); |
| if (!pte_dirty(pte)) |
| pte = pte_wrprotect(pte); |
| } |
| |
| set_pte(ptep, pte); |
| } |
| |
| /* |
| * Huge pte definitions. |
| */ |
| #define pte_huge(pte) ((pte_val(pte) & PTE_TYPE_MASK) == PTE_TYPE_HUGEPAGE) |
| #define pte_mkhuge(pte) (__pte((pte_val(pte) & ~PTE_TYPE_MASK) | PTE_TYPE_HUGEPAGE)) |
| |
| #define __HAVE_ARCH_PTE_SPECIAL |
| |
| /* |
| * Mark the prot value as uncacheable and unbufferable. |
| */ |
| #define pgprot_noncached(prot) \ |
| __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_DEVICE_nGnRnE)) |
| #define pgprot_writecombine(prot) \ |
| __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_DEVICE_GRE)) |
| #define pgprot_dmacoherent(prot) \ |
| __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL_NC)) |
| #define __HAVE_PHYS_MEM_ACCESS_PROT |
| struct file; |
| extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, |
| unsigned long size, pgprot_t vma_prot); |
| |
| #define pmd_none(pmd) (!pmd_val(pmd)) |
| #define pmd_present(pmd) (pmd_val(pmd)) |
| |
| #define pmd_bad(pmd) (!(pmd_val(pmd) & 2)) |
| |
| #define pmd_table(pmd) ((pmd_val(pmd) & PMD_TYPE_MASK) == \ |
| PMD_TYPE_TABLE) |
| #define pmd_sect(pmd) ((pmd_val(pmd) & PMD_TYPE_MASK) == \ |
| PMD_TYPE_SECT) |
| |
| |
| static inline void set_pmd(pmd_t *pmdp, pmd_t pmd) |
| { |
| *pmdp = pmd; |
| dsb(); |
| } |
| |
| static inline void pmd_clear(pmd_t *pmdp) |
| { |
| set_pmd(pmdp, __pmd(0)); |
| } |
| |
| static inline pte_t *pmd_page_vaddr(pmd_t pmd) |
| { |
| return __va(pmd_val(pmd) & PHYS_MASK & (s32)PAGE_MASK); |
| } |
| |
| #define pmd_page(pmd) pfn_to_page(__phys_to_pfn(pmd_val(pmd) & PHYS_MASK)) |
| |
| /* |
| * 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,prot) pfn_pte(page_to_pfn(page),prot) |
| |
| #ifndef CONFIG_ARM64_64K_PAGES |
| |
| #define pud_none(pud) (!pud_val(pud)) |
| #define pud_bad(pud) (!(pud_val(pud) & 2)) |
| #define pud_present(pud) (pud_val(pud)) |
| |
| static inline void set_pud(pud_t *pudp, pud_t pud) |
| { |
| *pudp = pud; |
| dsb(); |
| } |
| |
| static inline void pud_clear(pud_t *pudp) |
| { |
| set_pud(pudp, __pud(0)); |
| } |
| |
| static inline pmd_t *pud_page_vaddr(pud_t pud) |
| { |
| return __va(pud_val(pud) & PHYS_MASK & (s32)PAGE_MASK); |
| } |
| |
| #endif /* CONFIG_ARM64_64K_PAGES */ |
| |
| /* to find an entry in a page-table-directory */ |
| #define pgd_index(addr) (((addr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) |
| |
| #define pgd_offset(mm, addr) ((mm)->pgd+pgd_index(addr)) |
| |
| /* to find an entry in a kernel page-table-directory */ |
| #define pgd_offset_k(addr) pgd_offset(&init_mm, addr) |
| |
| /* Find an entry in the second-level page table.. */ |
| #ifndef CONFIG_ARM64_64K_PAGES |
| #define pmd_index(addr) (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)) |
| static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr) |
| { |
| return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(addr); |
| } |
| #endif |
| |
| /* Find an entry in the third-level page table.. */ |
| #define __pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) |
| |
| static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| { |
| const pteval_t mask = PTE_USER | PTE_PXN | PTE_UXN | PTE_RDONLY | |
| PTE_PROT_NONE | PTE_VALID; |
| pte_val(pte) = (pte_val(pte) & ~mask) | (pgprot_val(newprot) & mask); |
| return pte; |
| } |
| |
| extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; |
| extern pgd_t idmap_pg_dir[PTRS_PER_PGD]; |
| |
| #define SWAPPER_DIR_SIZE (3 * PAGE_SIZE) |
| #define IDMAP_DIR_SIZE (2 * PAGE_SIZE) |
| |
| /* |
| * Encode and decode a swap entry: |
| * bits 0-1: present (must be zero) |
| * bit 2: PTE_FILE |
| * bits 3-8: swap type |
| * bits 9-63: swap offset |
| */ |
| #define __SWP_TYPE_SHIFT 3 |
| #define __SWP_TYPE_BITS 6 |
| #define __SWP_TYPE_MASK ((1 << __SWP_TYPE_BITS) - 1) |
| #define __SWP_OFFSET_SHIFT (__SWP_TYPE_BITS + __SWP_TYPE_SHIFT) |
| |
| #define __swp_type(x) (((x).val >> __SWP_TYPE_SHIFT) & __SWP_TYPE_MASK) |
| #define __swp_offset(x) ((x).val >> __SWP_OFFSET_SHIFT) |
| #define __swp_entry(type,offset) ((swp_entry_t) { ((type) << __SWP_TYPE_SHIFT) | ((offset) << __SWP_OFFSET_SHIFT) }) |
| |
| #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) |
| #define __swp_entry_to_pte(swp) ((pte_t) { (swp).val }) |
| |
| /* |
| * Ensure that there are not more swap files than can be encoded in the kernel |
| * the PTEs. |
| */ |
| #define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > __SWP_TYPE_BITS) |
| |
| /* |
| * Encode and decode a file entry: |
| * bits 0-1: present (must be zero) |
| * bit 2: PTE_FILE |
| * bits 3-63: file offset / PAGE_SIZE |
| */ |
| #define pte_file(pte) (pte_val(pte) & PTE_FILE) |
| #define pte_to_pgoff(x) (pte_val(x) >> 3) |
| #define pgoff_to_pte(x) __pte(((x) << 3) | PTE_FILE) |
| |
| #define PTE_FILE_MAX_BITS 61 |
| |
| extern int kern_addr_valid(unsigned long addr); |
| |
| #include <asm-generic/pgtable.h> |
| |
| /* |
| * remap a physical page `pfn' of size `size' with page protection `prot' |
| * into virtual address `from' |
| */ |
| #define io_remap_pfn_range(vma,from,pfn,size,prot) \ |
| remap_pfn_range(vma, from, pfn, size, prot) |
| |
| #define pgtable_cache_init() do { } while (0) |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #endif /* __ASM_PGTABLE_H */ |