diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/include/asm/page.h | 6 | ||||
| -rw-r--r-- | arch/arm/include/asm/pgalloc.h | 50 | ||||
| -rw-r--r-- | arch/arm/include/asm/pgtable.h | 315 | ||||
| -rw-r--r-- | arch/arm/kernel/smp.c | 36 | ||||
| -rw-r--r-- | arch/arm/kernel/traps.c | 12 | ||||
| -rw-r--r-- | arch/arm/mm/Makefile | 4 | ||||
| -rw-r--r-- | arch/arm/mm/fault-armv.c | 2 | ||||
| -rw-r--r-- | arch/arm/mm/fault.c | 2 | ||||
| -rw-r--r-- | arch/arm/mm/idmap.c | 67 | ||||
| -rw-r--r-- | arch/arm/mm/mm.h | 2 | ||||
| -rw-r--r-- | arch/arm/mm/mmu.c | 62 | ||||
| -rw-r--r-- | arch/arm/mm/pgd.c | 37 | ||||
| -rw-r--r-- | arch/arm/mm/proc-macros.S | 30 | ||||
| -rw-r--r-- | arch/arm/mm/proc-v7.S | 18 | ||||
| -rw-r--r-- | arch/arm/mm/proc-xscale.S | 4 |
15 files changed, 315 insertions, 332 deletions
diff --git a/arch/arm/include/asm/page.h b/arch/arm/include/asm/page.h index a485ac3..f51a695 100644 --- a/arch/arm/include/asm/page.h +++ b/arch/arm/include/asm/page.h @@ -151,13 +151,15 @@ extern void __cpu_copy_user_highpage(struct page *to, struct page *from, #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) extern void copy_page(void *to, const void *from); +typedef unsigned long pteval_t; + #undef STRICT_MM_TYPECHECKS #ifdef STRICT_MM_TYPECHECKS /* * These are used to make use of C type-checking.. */ -typedef struct { unsigned long pte; } pte_t; +typedef struct { pteval_t pte; } pte_t; typedef struct { unsigned long pmd; } pmd_t; typedef struct { unsigned long pgd[2]; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; @@ -175,7 +177,7 @@ typedef struct { unsigned long pgprot; } pgprot_t; /* * .. while these make it easier on the compiler */ -typedef unsigned long pte_t; +typedef pteval_t pte_t; typedef unsigned long pmd_t; typedef unsigned long pgd_t[2]; typedef unsigned long pgprot_t; diff --git a/arch/arm/include/asm/pgalloc.h b/arch/arm/include/asm/pgalloc.h index b12cc98..9763be0 100644 --- a/arch/arm/include/asm/pgalloc.h +++ b/arch/arm/include/asm/pgalloc.h @@ -30,14 +30,16 @@ #define pmd_free(mm, pmd) do { } while (0) #define pgd_populate(mm,pmd,pte) BUG() -extern pgd_t *get_pgd_slow(struct mm_struct *mm); -extern void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd); - -#define pgd_alloc(mm) get_pgd_slow(mm) -#define pgd_free(mm, pgd) free_pgd_slow(mm, pgd) +extern pgd_t *pgd_alloc(struct mm_struct *mm); +extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); #define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO) +static inline void clean_pte_table(pte_t *pte) +{ + clean_dcache_area(pte + PTE_HWTABLE_PTRS, PTE_HWTABLE_SIZE); +} + /* * Allocate one PTE table. * @@ -45,14 +47,14 @@ extern void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd); * into one table thus: * * +------------+ - * | h/w pt 0 | - * +------------+ - * | h/w pt 1 | - * +------------+ * | Linux pt 0 | * +------------+ * | Linux pt 1 | * +------------+ + * | h/w pt 0 | + * +------------+ + * | h/w pt 1 | + * +------------+ */ static inline pte_t * pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr) @@ -60,10 +62,8 @@ pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr) pte_t *pte; pte = (pte_t *)__get_free_page(PGALLOC_GFP); - if (pte) { - clean_dcache_area(pte, sizeof(pte_t) * PTRS_PER_PTE); - pte += PTRS_PER_PTE; - } + if (pte) + clean_pte_table(pte); return pte; } @@ -79,10 +79,8 @@ pte_alloc_one(struct mm_struct *mm, unsigned long addr) pte = alloc_pages(PGALLOC_GFP, 0); #endif if (pte) { - if (!PageHighMem(pte)) { - void *page = page_address(pte); - clean_dcache_area(page, sizeof(pte_t) * PTRS_PER_PTE); - } + if (!PageHighMem(pte)) + clean_pte_table(page_address(pte)); pgtable_page_ctor(pte); } @@ -94,10 +92,8 @@ pte_alloc_one(struct mm_struct *mm, unsigned long addr) */ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) { - if (pte) { - pte -= PTRS_PER_PTE; + if (pte) free_page((unsigned long)pte); - } } static inline void pte_free(struct mm_struct *mm, pgtable_t pte) @@ -106,8 +102,10 @@ static inline void pte_free(struct mm_struct *mm, pgtable_t pte) __free_page(pte); } -static inline void __pmd_populate(pmd_t *pmdp, unsigned long pmdval) +static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t pte, + unsigned long prot) { + unsigned long pmdval = (pte + PTE_HWTABLE_OFF) | prot; pmdp[0] = __pmd(pmdval); pmdp[1] = __pmd(pmdval + 256 * sizeof(pte_t)); flush_pmd_entry(pmdp); @@ -122,20 +120,16 @@ static inline void __pmd_populate(pmd_t *pmdp, unsigned long pmdval) static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) { - unsigned long pte_ptr = (unsigned long)ptep; - /* - * The pmd must be loaded with the physical - * address of the PTE table + * The pmd must be loaded with the physical address of the PTE table */ - pte_ptr -= PTRS_PER_PTE * sizeof(void *); - __pmd_populate(pmdp, __pa(pte_ptr) | _PAGE_KERNEL_TABLE); + __pmd_populate(pmdp, __pa(ptep), _PAGE_KERNEL_TABLE); } static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep) { - __pmd_populate(pmdp, page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE); + __pmd_populate(pmdp, page_to_phys(ptep), _PAGE_USER_TABLE); } #define pmd_pgtable(pmd) pmd_page(pmd) diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h index 53d1d5d..ebcb643 100644 --- a/arch/arm/include/asm/pgtable.h +++ b/arch/arm/include/asm/pgtable.h @@ -10,6 +10,7 @@ #ifndef _ASMARM_PGTABLE_H #define _ASMARM_PGTABLE_H +#include <linux/const.h> #include <asm-generic/4level-fixup.h> #include <asm/proc-fns.h> @@ -54,7 +55,7 @@ * Therefore, we tweak the implementation slightly - we tell Linux that we * have 2048 entries in the first level, each of which is 8 bytes (iow, two * hardware pointers to the second level.) The second level contains two - * hardware PTE tables arranged contiguously, followed by Linux versions + * hardware PTE tables arranged contiguously, preceded by Linux versions * which contain the state information Linux needs. We, therefore, end up * with 512 entries in the "PTE" level. * @@ -62,15 +63,15 @@ * * pgd pte * | | - * +--------+ +0 - * | |-----> +------------+ +0 + * +--------+ + * | | +------------+ +0 + * +- - - - + | Linux pt 0 | + * | | +------------+ +1024 + * +--------+ +0 | Linux pt 1 | + * | |-----> +------------+ +2048 * +- - - - + +4 | h/w pt 0 | - * | |-----> +------------+ +1024 + * | |-----> +------------+ +3072 * +--------+ +8 | h/w pt 1 | - * | | +------------+ +2048 - * +- - - - + | Linux pt 0 | - * | | +------------+ +3072 - * +--------+ | Linux pt 1 | * | | +------------+ +4096 * * See L_PTE_xxx below for definitions of bits in the "Linux pt", and @@ -102,6 +103,10 @@ #define PTRS_PER_PMD 1 #define PTRS_PER_PGD 2048 +#define PTE_HWTABLE_PTRS (PTRS_PER_PTE) +#define PTE_HWTABLE_OFF (PTE_HWTABLE_PTRS * sizeof(pte_t)) +#define PTE_HWTABLE_SIZE (PTRS_PER_PTE * sizeof(u32)) + /* * PMD_SHIFT determines the size of the area a second-level page table can map * PGDIR_SHIFT determines what a third-level page table entry can map @@ -112,13 +117,13 @@ #define LIBRARY_TEXT_START 0x0c000000 #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); +extern void __pte_error(const char *file, int line, pte_t); +extern void __pmd_error(const char *file, int line, pmd_t); +extern void __pgd_error(const char *file, int line, pgd_t); -#define pte_ERROR(pte) __pte_error(__FILE__, __LINE__, pte_val(pte)) -#define pmd_ERROR(pmd) __pmd_error(__FILE__, __LINE__, pmd_val(pmd)) -#define pgd_ERROR(pgd) __pgd_error(__FILE__, __LINE__, pgd_val(pgd)) +#define pte_ERROR(pte) __pte_error(__FILE__, __LINE__, pte) +#define pmd_ERROR(pmd) __pmd_error(__FILE__, __LINE__, pmd) +#define pgd_ERROR(pgd) __pgd_error(__FILE__, __LINE__, pgd) #endif /* !__ASSEMBLY__ */ #define PMD_SIZE (1UL << PMD_SHIFT) @@ -133,8 +138,7 @@ extern void __pgd_error(const char *file, int line, unsigned long val); */ #define FIRST_USER_ADDRESS PAGE_SIZE -#define FIRST_USER_PGD_NR 1 -#define USER_PTRS_PER_PGD ((TASK_SIZE/PGDIR_SIZE) - FIRST_USER_PGD_NR) +#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE) /* * section address mask and size definitions. @@ -161,30 +165,30 @@ extern void __pgd_error(const char *file, int line, unsigned long val); * The PTE table pointer refers to the hardware entries; the "Linux" * entries are stored 1024 bytes below. */ -#define L_PTE_PRESENT (1 << 0) -#define L_PTE_YOUNG (1 << 1) -#define L_PTE_FILE (1 << 2) /* only when !PRESENT */ -#define L_PTE_DIRTY (1 << 6) -#define L_PTE_WRITE (1 << 7) -#define L_PTE_USER (1 << 8) -#define L_PTE_EXEC (1 << 9) -#define L_PTE_SHARED (1 << 10) /* shared(v6), coherent(xsc3) */ +#define L_PTE_PRESENT (_AT(pteval_t, 1) << 0) +#define L_PTE_YOUNG (_AT(pteval_t, 1) << 1) +#define L_PTE_FILE (_AT(pteval_t, 1) << 2) /* only when !PRESENT */ +#define L_PTE_DIRTY (_AT(pteval_t, 1) << 6) +#define L_PTE_RDONLY (_AT(pteval_t, 1) << 7) +#define L_PTE_USER (_AT(pteval_t, 1) << 8) +#define L_PTE_XN (_AT(pteval_t, 1) << 9) +#define L_PTE_SHARED (_AT(pteval_t, 1) << 10) /* shared(v6), coherent(xsc3) */ /* * These are the memory types, defined to be compatible with * pre-ARMv6 CPUs cacheable and bufferable bits: XXCB */ -#define L_PTE_MT_UNCACHED (0x00 << 2) /* 0000 */ -#define L_PTE_MT_BUFFERABLE (0x01 << 2) /* 0001 */ -#define L_PTE_MT_WRITETHROUGH (0x02 << 2) /* 0010 */ -#define L_PTE_MT_WRITEBACK (0x03 << 2) /* 0011 */ -#define L_PTE_MT_MINICACHE (0x06 << 2) /* 0110 (sa1100, xscale) */ -#define L_PTE_MT_WRITEALLOC (0x07 << 2) /* 0111 */ -#define L_PTE_MT_DEV_SHARED (0x04 << 2) /* 0100 */ -#define L_PTE_MT_DEV_NONSHARED (0x0c << 2) /* 1100 */ -#define L_PTE_MT_DEV_WC (0x09 << 2) /* 1001 */ -#define L_PTE_MT_DEV_CACHED (0x0b << 2) /* 1011 */ -#define L_PTE_MT_MASK (0x0f << 2) +#define L_PTE_MT_UNCACHED (_AT(pteval_t, 0x00) << 2) /* 0000 */ +#define L_PTE_MT_BUFFERABLE (_AT(pteval_t, 0x01) << 2) /* 0001 */ +#define L_PTE_MT_WRITETHROUGH (_AT(pteval_t, 0x02) << 2) /* 0010 */ +#define L_PTE_MT_WRITEBACK (_AT(pteval_t, 0x03) << 2) /* 0011 */ +#define L_PTE_MT_MINICACHE (_AT(pteval_t, 0x06) << 2) /* 0110 (sa1100, xscale) */ +#define L_PTE_MT_WRITEALLOC (_AT(pteval_t, 0x07) << 2) /* 0111 */ +#define L_PTE_MT_DEV_SHARED (_AT(pteval_t, 0x04) << 2) /* 0100 */ +#define L_PTE_MT_DEV_NONSHARED (_AT(pteval_t, 0x0c) << 2) /* 1100 */ +#define L_PTE_MT_DEV_WC (_AT(pteval_t, 0x09) << 2) /* 1001 */ +#define L_PTE_MT_DEV_CACHED (_AT(pteval_t, 0x0b) << 2) /* 1011 */ +#define L_PTE_MT_MASK (_AT(pteval_t, 0x0f) << 2) #ifndef __ASSEMBLY__ @@ -201,23 +205,44 @@ extern pgprot_t pgprot_kernel; #define _MOD_PROT(p, b) __pgprot(pgprot_val(p) | (b)) -#define PAGE_NONE pgprot_user -#define PAGE_SHARED _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_WRITE) -#define PAGE_SHARED_EXEC _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_WRITE | L_PTE_EXEC) -#define PAGE_COPY _MOD_PROT(pgprot_user, L_PTE_USER) -#define PAGE_COPY_EXEC _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_EXEC) -#define PAGE_READONLY _MOD_PROT(pgprot_user, L_PTE_USER) -#define PAGE_READONLY_EXEC _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_EXEC) -#define PAGE_KERNEL pgprot_kernel -#define PAGE_KERNEL_EXEC _MOD_PROT(pgprot_kernel, L_PTE_EXEC) - -#define __PAGE_NONE __pgprot(_L_PTE_DEFAULT) -#define __PAGE_SHARED __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_WRITE) -#define __PAGE_SHARED_EXEC __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_WRITE | L_PTE_EXEC) -#define __PAGE_COPY __pgprot(_L_PTE_DEFAULT | L_PTE_USER) -#define __PAGE_COPY_EXEC __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_EXEC) -#define __PAGE_READONLY __pgprot(_L_PTE_DEFAULT | L_PTE_USER) -#define __PAGE_READONLY_EXEC __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_EXEC) +#define PAGE_NONE _MOD_PROT(pgprot_user, L_PTE_XN | L_PTE_RDONLY) +#define PAGE_SHARED _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_XN) +#define PAGE_SHARED_EXEC _MOD_PROT(pgprot_user, L_PTE_USER) +#define PAGE_COPY _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_RDONLY | L_PTE_XN) +#define PAGE_COPY_EXEC _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_RDONLY) +#define PAGE_READONLY _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_RDONLY | L_PTE_XN) +#define PAGE_READONLY_EXEC _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_RDONLY) +#define PAGE_KERNEL _MOD_PROT(pgprot_kernel, L_PTE_XN) +#define PAGE_KERNEL_EXEC pgprot_kernel + +#define __PAGE_NONE __pgprot(_L_PTE_DEFAULT | L_PTE_RDONLY | L_PTE_XN) +#define __PAGE_SHARED __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_XN) +#define __PAGE_SHARED_EXEC __pgprot(_L_PTE_DEFAULT | L_PTE_USER) +#define __PAGE_COPY __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_RDONLY | L_PTE_XN) +#define __PAGE_COPY_EXEC __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_RDONLY) +#define __PAGE_READONLY __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_RDONLY | L_PTE_XN) +#define __PAGE_READONLY_EXEC __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_RDONLY) + +#define __pgprot_modify(prot,mask,bits) \ + __pgprot((pgprot_val(prot) & ~(mask)) | (bits)) + +#define pgprot_noncached(prot) \ + __pgprot_modify(prot, L_PTE_MT_MASK, L_PTE_MT_UNCACHED) + +#define pgprot_writecombine(prot) \ + __pgprot_modify(prot, L_PTE_MT_MASK, L_PTE_MT_BUFFERABLE) + +#ifdef CONFIG_ARM_DMA_MEM_BUFFERABLE +#define pgprot_dmacoherent(prot) \ + __pgprot_modify(prot, L_PTE_MT_MASK, L_PTE_MT_BUFFERABLE | L_PTE_XN) +#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); +#else +#define pgprot_dmacoherent(prot) \ + __pgprot_modify(prot, L_PTE_MT_MASK, L_PTE_MT_UNCACHED | L_PTE_XN) +#endif #endif /* __ASSEMBLY__ */ @@ -255,26 +280,84 @@ extern pgprot_t pgprot_kernel; extern struct page *empty_zero_page; #define ZERO_PAGE(vaddr) (empty_zero_page) -#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT) -#define pfn_pte(pfn,prot) (__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))) -#define pte_none(pte) (!pte_val(pte)) -#define pte_clear(mm,addr,ptep) set_pte_ext(ptep, __pte(0), 0) -#define pte_page(pte) (pfn_to_page(pte_pfn(pte))) -#define pte_offset_kernel(dir,addr) (pmd_page_vaddr(*(dir)) + __pte_index(addr)) +extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; + +/* to find an entry in a page-table-directory */ +#define pgd_index(addr) ((addr) >> PGDIR_SHIFT) + +#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) + +/* + * The "pgd_xxx()" functions here are trivial for a folded two-level + * setup: the pgd is never bad, and a pmd always exists (as it's folded + * into the pgd entry) + */ +#define pgd_none(pgd) (0) +#define pgd_bad(pgd) (0) +#define pgd_present(pgd) (1) +#define pgd_clear(pgdp) do { } while (0) +#define set_pgd(pgd,pgdp) do { } while (0) + + +/* Find an entry in the second-level page table.. */ +#define pmd_offset(dir, addr) ((pmd_t *)(dir)) + +#define pmd_none(pmd) (!pmd_val(pmd)) +#define pmd_present(pmd) (pmd_val(pmd)) +#define pmd_bad(pmd) (pmd_val(pmd) & 2) + +#define copy_pmd(pmdpd,pmdps) \ + do { \ + pmdpd[0] = pmdps[0]; \ + pmdpd[1] = pmdps[1]; \ + flush_pmd_entry(pmdpd); \ + } while (0) + +#define pmd_clear(pmdp) \ + do { \ + pmdp[0] = __pmd(0); \ + pmdp[1] = __pmd(0); \ + clean_pmd_entry(pmdp); \ + } while (0) + +static inline pte_t *pmd_page_vaddr(pmd_t pmd) +{ + return __va(pmd_val(pmd) & PAGE_MASK); +} + +#define pmd_page(pmd) pfn_to_page(__phys_to_pfn(pmd_val(pmd))) + +/* we don't need complex calculations here as the pmd is folded into the pgd */ +#define pmd_addr_end(addr,end) (end) -#define pte_offset_map(dir,addr) (__pte_map(dir) + __pte_index(addr)) -#define pte_unmap(pte) __pte_unmap(pte) #ifndef CONFIG_HIGHPTE -#define __pte_map(dir) pmd_page_vaddr(*(dir)) +#define __pte_map(pmd) pmd_page_vaddr(*(pmd)) #define __pte_unmap(pte) do { } while (0) #else -#define __pte_map(dir) ((pte_t *)kmap_atomic(pmd_page(*(dir))) + PTRS_PER_PTE) -#define __pte_unmap(pte) kunmap_atomic((pte - PTRS_PER_PTE)) +#define __pte_map(pmd) (pte_t *)kmap_atomic(pmd_page(*(pmd))) +#define __pte_unmap(pte) kunmap_atomic(pte) #endif +#define pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) + +#define pte_offset_kernel(pmd,addr) (pmd_page_vaddr(*(pmd)) + pte_index(addr)) + +#define pte_offset_map(pmd,addr) (__pte_map(pmd) + pte_index(addr)) +#define pte_unmap(pte) __pte_unmap(pte) + +#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT) +#define pfn_pte(pfn,prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) + +#define pte_page(pte) pfn_to_page(pte_pfn(pte)) +#define mk_pte(page,prot) pfn_pte(page_to_pfn(page), prot) + #define set_pte_ext(ptep,pte,ext) cpu_set_pte_ext(ptep,pte,ext) +#define pte_clear(mm,addr,ptep) set_pte_ext(ptep, __pte(0), 0) #if __LINUX_ARM_ARCH__ < 6 static inline void __sync_icache_dcache(pte_t pteval) @@ -295,15 +378,12 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, } } -/* - * The following only work if pte_present() is true. - * Undefined behaviour if not.. - */ +#define pte_none(pte) (!pte_val(pte)) #define pte_present(pte) (pte_val(pte) & L_PTE_PRESENT) -#define pte_write(pte) (pte_val(pte) & L_PTE_WRITE) +#define pte_write(pte) (!(pte_val(pte) & L_PTE_RDONLY)) #define pte_dirty(pte) (pte_val(pte) & L_PTE_DIRTY) #define pte_young(pte) (pte_val(pte) & L_PTE_YOUNG) -#define pte_exec(pte) (pte_val(pte) & L_PTE_EXEC) +#define pte_exec(pte) (!(pte_val(pte) & L_PTE_XN)) #define pte_special(pte) (0) #define pte_present_user(pte) \ @@ -313,8 +393,8 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, #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, &= ~L_PTE_WRITE); -PTE_BIT_FUNC(mkwrite, |= L_PTE_WRITE); +PTE_BIT_FUNC(wrprotect, |= L_PTE_RDONLY); +PTE_BIT_FUNC(mkwrite, &= ~L_PTE_RDONLY); PTE_BIT_FUNC(mkclean, &= ~L_PTE_DIRTY); PTE_BIT_FUNC(mkdirty, |= L_PTE_DIRTY); PTE_BIT_FUNC(mkold, &= ~L_PTE_YOUNG); @@ -322,101 +402,13 @@ PTE_BIT_FUNC(mkyoung, |= L_PTE_YOUNG); static inline pte_t pte_mkspecial(pte_t pte) { return pte; } -#define __pgprot_modify(prot,mask,bits) \ - __pgprot((pgprot_val(prot) & ~(mask)) | (bits)) - -/* - * Mark the prot value as uncacheable and unbufferable. - */ -#define pgprot_noncached(prot) \ - __pgprot_modify(prot, L_PTE_MT_MASK, L_PTE_MT_UNCACHED) -#define pgprot_writecombine(prot) \ - __pgprot_modify(prot, L_PTE_MT_MASK, L_PTE_MT_BUFFERABLE) -#ifdef CONFIG_ARM_DMA_MEM_BUFFERABLE -#define pgprot_dmacoherent(prot) \ - __pgprot_modify(prot, L_PTE_MT_MASK|L_PTE_EXEC, L_PTE_MT_BUFFERABLE) -#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); -#else -#define pgprot_dmacoherent(prot) \ - __pgprot_modify(prot, L_PTE_MT_MASK|L_PTE_EXEC, L_PTE_MT_UNCACHED) -#endif - -#define pmd_none(pmd) (!pmd_val(pmd)) -#define pmd_present(pmd) (pmd_val(pmd)) -#define pmd_bad(pmd) (pmd_val(pmd) & 2) - -#define copy_pmd(pmdpd,pmdps) \ - do { \ - pmdpd[0] = pmdps[0]; \ - pmdpd[1] = pmdps[1]; \ - flush_pmd_entry(pmdpd); \ - } while (0) - -#define pmd_clear(pmdp) \ - do { \ - pmdp[0] = __pmd(0); \ - pmdp[1] = __pmd(0); \ - clean_pmd_entry(pmdp); \ - } while (0) - -static inline pte_t *pmd_page_vaddr(pmd_t pmd) -{ - unsigned long ptr; - - ptr = pmd_val(pmd) & ~(PTRS_PER_PTE * sizeof(void *) - 1); - ptr += PTRS_PER_PTE * sizeof(void *); - - return __va(ptr); -} - -#define pmd_page(pmd) pfn_to_page(__phys_to_pfn(pmd_val(pmd))) - -/* we don't need complex calculations here as the pmd is folded into the pgd */ -#define pmd_addr_end(addr,end) (end) - -/* - * 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) - -/* - * The "pgd_xxx()" functions here are trivial for a folded two-level - * setup: the pgd is never bad, and a pmd always exists (as it's folded - * into the pgd entry) - */ -#define pgd_none(pgd) (0) -#define pgd_bad(pgd) (0) -#define pgd_present(pgd) (1) -#define pgd_clear(pgdp) do { } while (0) -#define set_pgd(pgd,pgdp) do { } while (0) - -/* to find an entry in a page-table-directory */ -#define pgd_index(addr) ((addr) >> PGDIR_SHIFT) - -#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.. */ -#define pmd_offset(dir, addr) ((pmd_t *)(dir)) - -/* 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 unsigned long mask = L_PTE_EXEC | L_PTE_WRITE | L_PTE_USER; + const pteval_t mask = L_PTE_XN | L_PTE_RDONLY | L_PTE_USER; pte_val(pte) = (pte_val(pte) & ~mask) | (pgprot_val(newprot) & mask); return pte; } -extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; - /* * Encode and decode a swap entry. Swap entries are stored in the Linux * page tables as follows: @@ -481,6 +473,9 @@ extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; #define pgtable_cache_init() do { } while (0) +void identity_mapping_add(pgd_t *, unsigned long, unsigned long); +void identity_mapping_del(pgd_t *, unsigned long, unsigned long); + #endif /* !__ASSEMBLY__ */ #endif /* CONFIG_MMU */ diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 5ec79b4..4539ebc 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -55,42 +55,6 @@ enum ipi_msg_type { IPI_CPU_STOP, }; -static inline void identity_mapping_add(pgd_t *pgd, unsigned long start, - unsigned long end) -{ - unsigned long addr, prot; - pmd_t *pmd; - - prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE; - if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ && !cpu_is_xscale()) - prot |= PMD_BIT4; - - for (addr = start & PGDIR_MASK; addr < end;) { - pmd = pmd_offset(pgd + pgd_index(addr), addr); - pmd[0] = __pmd(addr | prot); - addr += SECTION_SIZE; - pmd[1] = __pmd(addr | prot); - addr += SECTION_SIZE; - flush_pmd_entry(pmd); - outer_clean_range(__pa(pmd), __pa(pmd + 1)); - } -} - -static inline void identity_mapping_del(pgd_t *pgd, unsigned long start, - unsigned long end) -{ - unsigned long addr; - pmd_t *pmd; - - for (addr = start & PGDIR_MASK; addr < end; addr += PGDIR_SIZE) { - pmd = pmd_offset(pgd + pgd_index(addr), addr); - pmd[0] = __pmd(0); - pmd[1] = __pmd(0); - clean_pmd_entry(pmd); - outer_clean_range(__pa(pmd), __pa(pmd + 1)); - } -} - int __cpuinit __cpu_up(unsigned int cpu) { struct cpuinfo_arm *ci = &per_cpu(cpu_data, cpu); diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index e02f4f7..ee57640 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -710,19 +710,19 @@ void __readwrite_bug(const char *fn) } EXPORT_SYMBOL(__readwrite_bug); -void __pte_error(const char *file, int line, unsigned long val) +void __pte_error(const char *file, int line, pte_t pte) { - printk("%s:%d: bad pte %08lx.\n", file, line, val); + printk("%s:%d: bad pte %08lx.\n", file, line, pte_val(pte)); } -void __pmd_error(const char *file, int line, unsigned long val) +void __pmd_error(const char *file, int line, pmd_t pmd) { - printk("%s:%d: bad pmd %08lx.\n", file, line, val); + printk("%s:%d: bad pmd %08lx.\n", file, line, pmd_val(pmd)); } -void __pgd_error(const char *file, int line, unsigned long val) +void __pgd_error(const char *file, int line, pgd_t pgd) { - printk("%s:%d: bad pgd %08lx.\n", file, line, val); + printk("%s:%d: bad pgd %08lx.\n", file, line, pgd_val(pgd)); } asmlinkage void __div0(void) diff --git a/arch/arm/mm/Makefile b/arch/arm/mm/Makefile index d63b6c4..00d74a0 100644 --- a/arch/arm/mm/Makefile +++ b/arch/arm/mm/Makefile @@ -5,8 +5,8 @@ obj-y := dma-mapping.o extable.o fault.o init.o \ iomap.o -obj-$(CONFIG_MMU) += fault-armv.o flush.o ioremap.o mmap.o \ - pgd.o mmu.o vmregion.o +obj-$(CONFIG_MMU) += fault-armv.o flush.o idmap.o ioremap.o \ + mmap.o pgd.o mmu.o vmregion.o ifneq ($(CONFIG_MMU),y) obj-y += nommu.o diff --git a/arch/arm/mm/fault-armv.c b/arch/arm/mm/fault-armv.c index 83e59f8..01210db 100644 --- a/arch/arm/mm/fault-armv.c +++ b/arch/arm/mm/fault-armv.c @@ -26,7 +26,7 @@ #include "mm.h" -static unsigned long shared_pte_mask = L_PTE_MT_BUFFERABLE; +static pteval_t shared_pte_mask = L_PTE_MT_BUFFERABLE; #if __LINUX_ARM_ARCH__ < 6 /* diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c index 1e21e12..f10f9ba 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -108,7 +108,7 @@ void show_pte(struct mm_struct *mm, unsigned long addr) pte = pte_offset_map(pmd, addr); printk(", *pte=%08lx", pte_val(*pte)); - printk(", *ppte=%08lx", pte_val(pte[-PTRS_PER_PTE])); + printk(", *ppte=%08lx", pte_val(pte[PTE_HWTABLE_PTRS])); pte_unmap(pte); } while(0); diff --git a/arch/arm/mm/idmap.c b/arch/arm/mm/idmap.c new file mode 100644 index 0000000..5729944 --- /dev/null +++ b/arch/arm/mm/idmap.c @@ -0,0 +1,67 @@ +#include <linux/kernel.h> + +#include <asm/cputype.h> +#include <asm/pgalloc.h> +#include <asm/pgtable.h> + +static void idmap_add_pmd(pgd_t *pgd, unsigned long addr, unsigned long end, + unsigned long prot) +{ + pmd_t *pmd = pmd_offset(pgd, addr); + + addr = (addr & PMD_MASK) | prot; + pmd[0] = __pmd(addr); + addr += SECTION_SIZE; + pmd[1] = __pmd(addr); + flush_pmd_entry(pmd); +} + +void identity_mapping_add(pgd_t *pgd, unsigned long addr, unsigned long end) +{ + unsigned long prot, next; + + prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE; + if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ && !cpu_is_xscale()) + prot |= PMD_BIT4; + + pgd += pgd_index(addr); + do { + next = pgd_addr_end(addr, end); + idmap_add_pmd(pgd, addr, next, prot); + } while (pgd++, addr = next, addr != end); +} + +#ifdef CONFIG_SMP +static void idmap_del_pmd(pgd_t *pgd, unsigned long addr, unsigned long end) +{ + pmd_t *pmd = pmd_offset(pgd, addr); + pmd_clear(pmd); +} + +void identity_mapping_del(pgd_t *pgd, unsigned long addr, unsigned long end) +{ + unsigned long next; + + pgd += pgd_index(addr); + do { + next = pgd_addr_end(addr, end); + idmap_del_pmd(pgd, addr, next); + } while (pgd++, addr = next, addr != end); +} +#endif + +/* + * In order to soft-boot, we need to insert a 1:1 mapping in place of + * the user-mode pages. This will then ensure that we have predictable + * results when turning the mmu off + */ +void setup_mm_for_reboot(char mode) +{ + /* + * We need to access to user-mode page tables here. For kernel threads + * we don't have any user-mode mappings so we use the context that we + * "borrowed". + */ + identity_mapping_add(current->active_mm->pgd, 0, TASK_SIZE); + local_flush_tlb_all(); +} diff --git a/arch/arm/mm/mm.h b/arch/arm/mm/mm.h index 6630620..36960df 100644 --- a/arch/arm/mm/mm.h +++ b/arch/arm/mm/mm.h @@ -16,7 +16,7 @@ static inline pmd_t *pmd_off_k(unsigned long virt) } struct mem_type { - unsigned int prot_pte; + pteval_t prot_pte; unsigned int prot_l1; unsigned int prot_sect; unsigned int domain; diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 79c01f5..3c67e92 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -63,7 +63,7 @@ struct cachepolicy { const char policy[16]; unsigned int cr_mask; unsigned int pmd; - unsigned int pte; + pteval_t pte; }; static struct cachepolicy cache_policies[] __initdata = { @@ -191,7 +191,7 @@ void adjust_cr(unsigned long mask, unsigned long set) } #endif -#define PROT_PTE_DEVICE L_PTE_PRESENT|L_PTE_YOUNG|L_PTE_DIRTY|L_PTE_WRITE +#define PROT_PTE_DEVICE L_PTE_PRESENT|L_PTE_YOUNG|L_PTE_DIRTY|L_PTE_XN #define PROT_SECT_DEVICE PMD_TYPE_SECT|PMD_SECT_AP_WRITE static struct mem_type mem_types[] = { @@ -236,19 +236,18 @@ static struct mem_type mem_types[] = { }, [MT_LOW_VECTORS] = { .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | - L_PTE_EXEC, + L_PTE_RDONLY, .prot_l1 = PMD_TYPE_TABLE, .domain = DOMAIN_USER, }, [MT_HIGH_VECTORS] = { .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | - L_PTE_USER | L_PTE_EXEC, + L_PTE_USER | L_PTE_RDONLY, .prot_l1 = PMD_TYPE_TABLE, .domain = DOMAIN_USER, }, [MT_MEMORY] = { - .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | - L_PTE_WRITE | L_PTE_EXEC, + .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY, .prot_l1 = PMD_TYPE_TABLE, .prot_sect = PMD_TYPE_SECT | PMD_SECT_AP_WRITE, .domain = DOMAIN_KERNEL, @@ -259,21 +258,20 @@ static struct mem_type mem_types[] = { }, [MT_MEMORY_NONCACHED] = { .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | - L_PTE_WRITE | L_PTE_EXEC | L_PTE_MT_BUFFERABLE, + L_PTE_MT_BUFFERABLE, .prot_l1 = PMD_TYPE_TABLE, .prot_sect = PMD_TYPE_SECT | PMD_SECT_AP_WRITE, .domain = DOMAIN_KERNEL, }, [MT_MEMORY_DTCM] = { .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | - L_PTE_WRITE, + L_PTE_XN, .prot_l1 = PMD_TYPE_TABLE, .prot_sect = PMD_TYPE_SECT | PMD_SECT_XN, .domain = DOMAIN_KERNEL, }, [MT_MEMORY_ITCM] = { - .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | - L_PTE_WRITE | L_PTE_EXEC, + .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY, .prot_l1 = PMD_TYPE_TABLE, .domain = DOMAIN_KERNEL, }, @@ -480,7 +478,7 @@ static void __init build_mem_type_table(void) pgprot_user = __pgprot(L_PTE_PRESENT | L_PTE_YOUNG | user_pgprot); pgprot_kernel = __pgprot(L_PTE_PRESENT | L_PTE_YOUNG | - L_PTE_DIRTY | L_PTE_WRITE | kern_pgprot); + L_PTE_DIRTY | kern_pgprot); mem_types[MT_LOW_VECTORS].prot_l1 |= ecc_mask; mem_types[MT_HIGH_VECTORS].prot_l1 |= ecc_mask; @@ -536,7 +534,7 @@ static pte_t * __init early_pte_alloc(pmd_t *pmd, unsigned long addr, unsigned l { if (pmd_none(*pmd)) { pte_t *pte = early_alloc(2 * PTRS_PER_PTE * sizeof(pte_t)); - __pmd_populate(pmd, __pa(pte) | prot); + __pmd_populate(pmd, __pa(pte), prot); } BUG_ON(pmd_bad(*pmd)); return pte_offset_kernel(pmd, addr); @@ -554,7 +552,7 @@ static void __init alloc_init_pte(pmd_t *pmd, unsigned long addr, } static void __init alloc_init_section(pgd_t *pgd, unsigned long addr, - unsigned long end, unsigned long phys, + unsigned long end, phys_addr_t phys, const struct mem_type *type) { pmd_t *pmd = pmd_offset(pgd, addr); @@ -589,7 +587,8 @@ static void __init alloc_init_section(pgd_t *pgd, unsigned long addr, static void __init create_36bit_mapping(struct map_desc *md, const struct mem_type *type) { - unsigned long phys, addr, length, end; + unsigned long addr, length, end; + phys_addr_t phys; pgd_t *pgd; addr = md->virtual; @@ -1044,38 +1043,3 @@ void __init paging_init(struct machine_desc *mdesc) empty_zero_page = virt_to_page(zero_page); __flush_dcache_page(NULL, empty_zero_page); } - -/* - * In order to soft-boot, we need to insert a 1:1 mapping in place of - * the user-mode pages. This will then ensure that we have predictable - * results when turning the mmu off - */ -void setup_mm_for_reboot(char mode) -{ - unsigned long base_pmdval; - pgd_t *pgd; - int i; - - /* - * We need to access to user-mode page tables here. For kernel threads - * we don't have any user-mode mappings so we use the context that we - * "borrowed". - */ - pgd = current->active_mm->pgd; - - base_pmdval = PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | PMD_TYPE_SECT; - if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ && !cpu_is_xscale()) - base_pmdval |= PMD_BIT4; - - for (i = 0; i < FIRST_USER_PGD_NR + USER_PTRS_PER_PGD; i++, pgd++) { - unsigned long pmdval = (i << PGDIR_SHIFT) | base_pmdval; - pmd_t *pmd; - - pmd = pmd_off(pgd, i << PGDIR_SHIFT); - pmd[0] = __pmd(pmdval); - pmd[1] = __pmd(pmdval + (1 << (PGDIR_SHIFT - 1))); - flush_pmd_entry(pmd); - } - - local_flush_tlb_all(); -} diff --git a/arch/arm/mm/pgd.c b/arch/arm/mm/pgd.c index 69bbfc6..93292a1 100644 --- a/arch/arm/mm/pgd.c +++ b/arch/arm/mm/pgd.c @@ -17,12 +17,10 @@ #include "mm.h" -#define FIRST_KERNEL_PGD_NR (FIRST_USER_PGD_NR + USER_PTRS_PER_PGD) - /* * need to get a 16k page for level 1 */ -pgd_t *get_pgd_slow(struct mm_struct *mm) +pgd_t *pgd_alloc(struct mm_struct *mm) { pgd_t *new_pgd, *init_pgd; pmd_t *new_pmd, *init_pmd; @@ -32,14 +30,14 @@ pgd_t *get_pgd_slow(struct mm_struct *mm) if (!new_pgd) goto no_pgd; - memset(new_pgd, 0, FIRST_KERNEL_PGD_NR * sizeof(pgd_t)); + memset(new_pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t)); /* * Copy over the kernel and IO PGD entries */ init_pgd = pgd_offset_k(0); - memcpy(new_pgd + FIRST_KERNEL_PGD_NR, init_pgd + FIRST_KERNEL_PGD_NR, - (PTRS_PER_PGD - FIRST_KERNEL_PGD_NR) * sizeof(pgd_t)); + memcpy(new_pgd + USER_PTRS_PER_PGD, init_pgd + USER_PTRS_PER_PGD, + (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); clean_dcache_area(new_pgd, PTRS_PER_PGD * sizeof(pgd_t)); @@ -73,28 +71,29 @@ no_pgd: return NULL; } -void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd) +void pgd_free(struct mm_struct *mm, pgd_t *pgd_base) { + pgd_t *pgd; pmd_t *pmd; pgtable_t pte; - if (!pgd) + if (!pgd_base) return; - /* pgd is always present and good */ - pmd = pmd_off(pgd, 0); - if (pmd_none(*pmd)) - goto free; - if (pmd_bad(*pmd)) { - pmd_ERROR(*pmd); - pmd_clear(pmd); - goto free; - } + pgd = pgd_base + pgd_index(0); + if (pgd_none_or_clear_bad(pgd)) + goto no_pgd; + + pmd = pmd_offset(pgd, 0); + if (pmd_none_or_clear_bad(pmd)) + goto no_pmd; pte = pmd_pgtable(*pmd); pmd_clear(pmd); pte_free(mm, pte); +no_pmd: + pgd_clear(pgd); pmd_free(mm, pmd); -free: - free_pages((unsigned long) pgd, 2); +no_pgd: + free_pages((unsigned long) pgd_base, 2); } diff --git a/arch/arm/mm/proc-macros.S b/arch/arm/mm/proc-macros.S index f8f777d..e32fa49 100644 --- a/arch/arm/mm/proc-macros.S +++ b/arch/arm/mm/proc-macros.S @@ -91,7 +91,7 @@ #if L_PTE_SHARED != PTE_EXT_SHARED #error PTE shared bit mismatch #endif -#if (L_PTE_EXEC+L_PTE_USER+L_PTE_WRITE+L_PTE_DIRTY+L_PTE_YOUNG+\ +#if (L_PTE_XN+L_PTE_USER+L_PTE_RDONLY+L_PTE_DIRTY+L_PTE_YOUNG+\ L_PTE_FILE+L_PTE_PRESENT) > L_PTE_SHARED #error Invalid Linux PTE bit settings #endif @@ -135,7 +135,7 @@ .endm .macro armv6_set_pte_ext pfx - str r1, [r0], #-2048 @ linux version + str r1, [r0], #2048 @ linux version bic r3, r1, #0x000003fc bic r3, r3, #PTE_TYPE_MASK @@ -146,9 +146,9 @@ and r2, r1, #L_PTE_MT_MASK ldr r2, [ip, r2] - tst r1, #L_PTE_WRITE - tstne r1, #L_PTE_DIRTY - orreq r3, r3, #PTE_EXT_APX + eor r1, r1, #L_PTE_DIRTY + tst r1, #L_PTE_DIRTY|L_PTE_RDONLY + orrne r3, r3, #PTE_EXT_APX tst r1, #L_PTE_USER orrne r3, r3, #PTE_EXT_AP1 @@ -158,8 +158,8 @@ bicne r3, r3, #PTE_EXT_APX | PTE_EXT_AP0 #endif - tst r1, #L_PTE_EXEC - orreq r3, r3, #PTE_EXT_XN + tst r1, #L_PTE_XN + orrne r3, r3, #PTE_EXT_XN orr r3, r3, r2 @@ -187,9 +187,9 @@ * 1111 0xff r/w r/w */ .macro armv3_set_pte_ext wc_disable=1 - str r1, [r0], #-2048 @ linux version + str r1, [r0], #2048 @ linux version - eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY + eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY bic r2, r1, #PTE_SMALL_AP_MASK @ keep C, B bits bic r2, r2, #PTE_TYPE_MASK @@ -198,7 +198,7 @@ tst r3, #L_PTE_USER @ user? orrne r2, r2, #PTE_SMALL_AP_URO_SRW - tst r3, #L_PTE_WRITE | L_PTE_DIRTY @ write and dirty? + tst r3, #L_PTE_RDONLY | L_PTE_DIRTY @ write and dirty? orreq r2, r2, #PTE_SMALL_AP_UNO_SRW tst r3, #L_PTE_PRESENT | L_PTE_YOUNG @ present and young? @@ -210,7 +210,7 @@ bicne r2, r2, #PTE_BUFFERABLE #endif .endif - str r2, [r0] @ hardware version + str r2, [r0] @ hardware version .endm @@ -230,9 +230,9 @@ * 1111 11 r/w r/w */ .macro xscale_set_pte_ext_prologue - str r1, [r0], #-2048 @ linux version + str r1, [r0] @ linux version - eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_WRITE | L_PTE_DIRTY + eor r3, r1, #L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY bic r2, r1, #PTE_SMALL_AP_MASK @ keep C, B bits orr r2, r2, #PTE_TYPE_EXT @ extended page @@ -240,7 +240,7 @@ tst r3, #L_PTE_USER @ user? orrne r2, r2, #PTE_EXT_AP_URO_SRW @ yes -> user r/o, system r/w - tst r3, #L_PTE_WRITE | L_PTE_DIRTY @ write and dirty? + tst r3, #L_PTE_RDONLY | L_PTE_DIRTY @ write and dirty? orreq r2, r2, #PTE_EXT_AP_UNO_SRW @ yes -> user n/a, system r/w @ combined with user -> user r/w .endm @@ -249,7 +249,7 @@ tst r3, #L_PTE_PRESENT | L_PTE_YOUNG @ present and young? movne r2, #0 @ no -> fault - str r2, [r0] @ hardware version + str r2, [r0, #2048]! @ hardware version mov ip, #0 mcr p15, 0, r0, c7, c10, 1 @ clean L1 D line mcr p15, 0, ip, c7, c10, 4 @ data write barrier diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S index 7401f4d..b49fab2 100644 --- a/arch/arm/mm/proc-v7.S +++ b/arch/arm/mm/proc-v7.S @@ -124,15 +124,13 @@ ENDPROC(cpu_v7_switch_mm) * Set a level 2 translation table entry. * * - ptep - pointer to level 2 translation table entry - * (hardware version is stored at -1024 bytes) + * (hardware version is stored at +2048 bytes) * - pte - PTE value to store * - ext - value for extended PTE bits */ ENTRY(cpu_v7_set_pte_ext) #ifdef CONFIG_MMU - ARM( str r1, [r0], #-2048 ) @ linux version - THUMB( str r1, [r0] ) @ linux version - THUMB( sub r0, r0, #2048 ) + str r1, [r0] @ linux version bic r3, r1, #0x000003f0 bic r3, r3, #PTE_TYPE_MASK @@ -142,9 +140,9 @@ ENTRY(cpu_v7_set_pte_ext) tst r1, #1 << 4 orrne r3, r3, #PTE_EXT_TEX(1) - tst r1, #L_PTE_WRITE - tstne r1, #L_PTE_DIRTY - orreq r3, r3, #PTE_EXT_APX + eor r1, r1, #L_PTE_DIRTY + tst r1, #L_PTE_RDONLY | L_PTE_DIRTY + orrne r3, r3, #PTE_EXT_APX tst r1, #L_PTE_USER orrne r3, r3, #PTE_EXT_AP1 @@ -154,14 +152,14 @@ ENTRY(cpu_v7_set_pte_ext) bicne r3, r3, #PTE_EXT_APX | PTE_EXT_AP0 #endif - tst r1, #L_PTE_EXEC - orreq r3, r3, #PTE_EXT_XN + tst r1, #L_PTE_XN + orrne r3, r3, #PTE_EXT_XN tst r1, #L_PTE_YOUNG tstne r1, #L_PTE_PRESENT moveq r3, #0 - str r3, [r0] + str r3, [r0, #2048]! mcr p15, 0, r0, c7, c10, 1 @ flush_pte #endif mov pc, lr diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S index 523408c..5a37c5e 100644 --- a/arch/arm/mm/proc-xscale.S +++ b/arch/arm/mm/proc-xscale.S @@ -500,8 +500,8 @@ ENTRY(cpu_xscale_set_pte_ext) @ @ Erratum 40: must set memory to write-through for user read-only pages @ - and ip, r1, #(L_PTE_MT_MASK | L_PTE_USER | L_PTE_WRITE) & ~(4 << 2) - teq ip, #L_PTE_MT_WRITEBACK | L_PTE_USER + and ip, r1, #(L_PTE_MT_MASK | L_PTE_USER | L_PTE_RDONLY) & ~(4 << 2) + teq ip, #L_PTE_MT_WRITEBACK | L_PTE_USER | L_PTE_RDONLY moveq r1, #L_PTE_MT_WRITETHROUGH and r1, r1, #L_PTE_MT_MASK |