diff options
Diffstat (limited to 'arch/csky/include/asm/pgtable.h')
| -rw-r--r-- | arch/csky/include/asm/pgtable.h | 144 |
1 files changed, 50 insertions, 94 deletions
diff --git a/arch/csky/include/asm/pgtable.h b/arch/csky/include/asm/pgtable.h index 4b2a41e15f2e..a397e1718ab6 100644 --- a/arch/csky/include/asm/pgtable.h +++ b/arch/csky/include/asm/pgtable.h @@ -1,10 +1,10 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_PGTABLE_H #define __ASM_CSKY_PGTABLE_H #include <asm/fixmap.h> +#include <asm/memory.h> #include <asm/addrspace.h> #include <abi/pgtable-bits.h> #include <asm-generic/pgtable-nopmd.h> @@ -13,57 +13,32 @@ #define PGDIR_SIZE (1UL << PGDIR_SHIFT) #define PGDIR_MASK (~(PGDIR_SIZE-1)) -#define USER_PTRS_PER_PGD (0x80000000UL/PGDIR_SIZE) -#define FIRST_USER_ADDRESS 0UL - -#define PKMAP_BASE (0xff800000) - -#define VMALLOC_START (0xc0008000) -#define VMALLOC_END (PKMAP_BASE - 2*PAGE_SIZE) +#define USER_PTRS_PER_PGD (PAGE_OFFSET/PGDIR_SIZE) /* * C-SKY is two-level paging structure: */ -#define PGD_ORDER 0 -#define PTE_ORDER 0 -#define PTRS_PER_PGD ((PAGE_SIZE << PGD_ORDER) / sizeof(pgd_t)) +#define PTRS_PER_PGD (PAGE_SIZE / sizeof(pgd_t)) #define PTRS_PER_PMD 1 -#define PTRS_PER_PTE ((PAGE_SIZE << PTE_ORDER) / sizeof(pte_t)) +#define PTRS_PER_PTE (PAGE_SIZE / sizeof(pte_t)) #define pte_ERROR(e) \ pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, (e).pte_low) #define pgd_ERROR(e) \ pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) -/* Find an entry in the third-level page table.. */ -#define __pte_offset_t(address) \ - (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) -#define pte_offset_kernel(dir, address) \ - (pmd_page_vaddr(*(dir)) + __pte_offset_t(address)) -#define pte_offset_map(dir, address) \ - ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset_t(address)) +#define PFN_PTE_SHIFT PAGE_SHIFT +#define pmd_pfn(pmd) (pmd_phys(pmd) >> PAGE_SHIFT) #define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT)) #define pte_clear(mm, addr, ptep) set_pte((ptep), \ - (((unsigned int) addr & PAGE_OFFSET) ? __pte(_PAGE_GLOBAL) : __pte(0))) + (((unsigned int) addr >= PAGE_OFFSET) ? __pte(_PAGE_GLOBAL) : __pte(0))) #define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL)) #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) #define pte_pfn(x) ((unsigned long)((x).pte_low >> PAGE_SHIFT)) #define pfn_pte(pfn, prot) __pte(((unsigned long long)(pfn) << PAGE_SHIFT) \ | pgprot_val(prot)) -#define __READABLE (_PAGE_READ | _PAGE_VALID | _PAGE_ACCESSED) -#define __WRITEABLE (_PAGE_WRITE | _PAGE_DIRTY | _PAGE_MODIFIED) - -#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_MODIFIED | \ - _CACHE_MASK) - -#define pte_unmap(pte) ((void)(pte)) - -#define __swp_type(x) (((x).val >> 4) & 0xff) -#define __swp_offset(x) ((x).val >> 12) -#define __swp_entry(type, offset) ((swp_entry_t) {((type) << 4) | \ - ((offset) << 12) }) #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) @@ -72,41 +47,34 @@ pgprot_val(pgprot)) /* - * CSKY can't do page protection for execute, and considers that the same like - * read. Also, write permissions imply read permissions. This is the closest - * we can get by reasonable means.. + * C-SKY only has VALID and DIRTY bit in hardware. So we need to use the + * two bits emulate PRESENT, READ, WRITE, EXEC, MODIFIED, ACCESSED. */ -#define PAGE_NONE __pgprot(_PAGE_PRESENT | _CACHE_CACHED) -#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ +#define _PAGE_BASE (_PAGE_PRESENT | _PAGE_ACCESSED) + +#define PAGE_NONE __pgprot(_PAGE_PROT_NONE) +#define PAGE_READ __pgprot(_PAGE_BASE | _PAGE_READ | \ + _CACHE_CACHED) +#define PAGE_WRITE __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_WRITE | \ _CACHE_CACHED) -#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_READ | _CACHE_CACHED) -#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_READ | _CACHE_CACHED) -#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ - _PAGE_GLOBAL | _CACHE_CACHED) -#define PAGE_USERIO __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ +#define PAGE_SHARED PAGE_WRITE + +#define PAGE_KERNEL __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_VALID | \ + _PAGE_WRITE | _PAGE_DIRTY | _PAGE_MODIFIED | \ + _PAGE_GLOBAL | \ _CACHE_CACHED) -#define _PAGE_IOREMAP \ - (_PAGE_PRESENT | __READABLE | __WRITEABLE | _PAGE_GLOBAL | \ - _CACHE_UNCACHED | _PAGE_SO) - -#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 +#define _PAGE_IOREMAP (_PAGE_BASE | _PAGE_READ | _PAGE_VALID | \ + _PAGE_WRITE | _PAGE_DIRTY | _PAGE_MODIFIED | \ + _PAGE_GLOBAL | \ + _CACHE_UNCACHED | _PAGE_SO) + +#define _PAGE_CHG_MASK (~(unsigned long) \ + (_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ + _CACHE_MASK | _PAGE_GLOBAL)) + +#define MAX_SWAPFILES_CHECK() \ + BUILD_BUG_ON(MAX_SWAPFILES_SHIFT != 5) extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) @@ -114,9 +82,6 @@ extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; extern void load_pgd(unsigned long pg_dir); extern pte_t invalid_pte_table[PTRS_PER_PTE]; -static inline int pte_special(pte_t pte) { return 0; } -static inline pte_t pte_mkspecial(pte_t pte) { return pte; } - static inline void set_pte(pte_t *p, pte_t pte) { *p = pte; @@ -126,7 +91,6 @@ static inline void set_pte(pte_t *p, pte_t pte) /* prevent out of order excution */ smp_mb(); } -#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval) static inline pte_t *pmd_page_vaddr(pmd_t pmd) { @@ -212,7 +176,7 @@ static inline pte_t pte_mkold(pte_t pte) return pte; } -static inline pte_t pte_mkwrite(pte_t pte) +static inline pte_t pte_mkwrite_novma(pte_t pte) { pte_val(pte) |= _PAGE_WRITE; if (pte_val(pte) & _PAGE_MODIFIED) @@ -236,14 +200,22 @@ static inline pte_t pte_mkyoung(pte_t pte) return pte; } -#define __pgd_offset(address) pgd_index(address) -#define __pud_offset(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1)) -#define __pmd_offset(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) +static inline int pte_swp_exclusive(pte_t pte) +{ + return pte_val(pte) & _PAGE_SWP_EXCLUSIVE; +} -/* to find an entry in a kernel page-table-directory */ -#define pgd_offset_k(address) pgd_offset(&init_mm, address) +static inline pte_t pte_swp_mkexclusive(pte_t pte) +{ + pte_val(pte) |= _PAGE_SWP_EXCLUSIVE; + return pte; +} -#define pgd_index(address) ((address) >> PGDIR_SHIFT) +static inline pte_t pte_swp_clear_exclusive(pte_t pte) +{ + pte_val(pte) &= ~_PAGE_SWP_EXCLUSIVE; + return pte; +} #define __HAVE_PHYS_MEM_ACCESS_PROT struct file; @@ -288,31 +260,15 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) (pgprot_val(newprot))); } -/* to find an entry in a page-table-directory */ -static inline pgd_t *pgd_offset(struct mm_struct *mm, unsigned long address) -{ - return mm->pgd + pgd_index(address); -} - -/* Find an entry in the third-level page table.. */ -static inline pte_t *pte_offset(pmd_t *dir, unsigned long address) -{ - return (pte_t *) (pmd_page_vaddr(*dir)) + - ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)); -} - extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; extern void paging_init(void); -void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, - pte_t *pte); - -/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ -#define kern_addr_valid(addr) (1) +void update_mmu_cache_range(struct vm_fault *vmf, struct vm_area_struct *vma, + unsigned long address, pte_t *pte, unsigned int nr); +#define update_mmu_cache(vma, addr, ptep) \ + update_mmu_cache_range(NULL, vma, addr, ptep, 1) #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ remap_pfn_range(vma, vaddr, pfn, size, prot) -#include <asm-generic/pgtable.h> - #endif /* __ASM_CSKY_PGTABLE_H */ |