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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-01-06 22:33:19 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-01-06 22:33:19 +0000
commit28cdac6690cb113856293bf79b40de33dbd8f974 (patch)
tree64cd8ca8376ccf9a12faee3588c15a5839f9a28b /arch/arm/mm/mmu.c
parent4073723acb9cdcdbe4df9c0e0c376c65d1697e43 (diff)
parent36bb94ba36f332de767cfaa3af6a5136435a3a9c (diff)
Merge branch 'pgt' (early part) into devel
Diffstat (limited to 'arch/arm/mm/mmu.c')
-rw-r--r--arch/arm/mm/mmu.c62
1 files changed, 13 insertions, 49 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 79c01f540cb..3c67e92f7d5 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();
-}