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authorRussell King <rmk+kernel@arm.linux.org.uk>2013-10-24 10:26:40 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-12-11 09:53:14 +0000
commit2e2c9de207be043ee80161971c814d740759d3bc (patch)
tree8c818e8ea95b4c9cbfc9a25ab8719c12954d9f75 /arch/arm/mm
parent1fd15b879d0075c8916e52fb9e52522827433d1f (diff)
downloadop-kernel-dev-2e2c9de207be043ee80161971c814d740759d3bc.zip
op-kernel-dev-2e2c9de207be043ee80161971c814d740759d3bc.tar.gz
ARM: add permission annotations to MT_MEMORY* mapping types
Document the permissions which the various MT_MEMORY* mapping types will provide. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm')
-rw-r--r--arch/arm/mm/ioremap.c4
-rw-r--r--arch/arm/mm/mmu.c30
2 files changed, 17 insertions, 17 deletions
diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index f123d6e..f9c32ba 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -392,9 +392,9 @@ __arm_ioremap_exec(phys_addr_t phys_addr, size_t size, bool cached)
unsigned int mtype;
if (cached)
- mtype = MT_MEMORY;
+ mtype = MT_MEMORY_RWX;
else
- mtype = MT_MEMORY_NONCACHED;
+ mtype = MT_MEMORY_RWX_NONCACHED;
return __arm_ioremap_caller(phys_addr, size, mtype,
__builtin_return_address(0));
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 580ef2d..fce2e73 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -287,7 +287,7 @@ static struct mem_type mem_types[] = {
.prot_l1 = PMD_TYPE_TABLE,
.domain = DOMAIN_USER,
},
- [MT_MEMORY] = {
+ [MT_MEMORY_RWX] = {
.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,
@@ -297,26 +297,26 @@ static struct mem_type mem_types[] = {
.prot_sect = PMD_TYPE_SECT,
.domain = DOMAIN_KERNEL,
},
- [MT_MEMORY_NONCACHED] = {
+ [MT_MEMORY_RWX_NONCACHED] = {
.prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
L_PTE_MT_BUFFERABLE,
.prot_l1 = PMD_TYPE_TABLE,
.prot_sect = PMD_TYPE_SECT | PMD_SECT_AP_WRITE,
.domain = DOMAIN_KERNEL,
},
- [MT_MEMORY_DTCM] = {
+ [MT_MEMORY_RW_DTCM] = {
.prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
L_PTE_XN,
.prot_l1 = PMD_TYPE_TABLE,
.prot_sect = PMD_TYPE_SECT | PMD_SECT_XN,
.domain = DOMAIN_KERNEL,
},
- [MT_MEMORY_ITCM] = {
+ [MT_MEMORY_RWX_ITCM] = {
.prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY,
.prot_l1 = PMD_TYPE_TABLE,
.domain = DOMAIN_KERNEL,
},
- [MT_MEMORY_SO] = {
+ [MT_MEMORY_RW_SO] = {
.prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
L_PTE_MT_UNCACHED | L_PTE_XN,
.prot_l1 = PMD_TYPE_TABLE,
@@ -487,11 +487,11 @@ static void __init build_mem_type_table(void)
mem_types[MT_DEVICE_WC].prot_pte |= L_PTE_SHARED;
mem_types[MT_DEVICE_CACHED].prot_sect |= PMD_SECT_S;
mem_types[MT_DEVICE_CACHED].prot_pte |= L_PTE_SHARED;
- mem_types[MT_MEMORY].prot_sect |= PMD_SECT_S;
- mem_types[MT_MEMORY].prot_pte |= L_PTE_SHARED;
+ mem_types[MT_MEMORY_RWX].prot_sect |= PMD_SECT_S;
+ mem_types[MT_MEMORY_RWX].prot_pte |= L_PTE_SHARED;
mem_types[MT_MEMORY_DMA_READY].prot_pte |= L_PTE_SHARED;
- mem_types[MT_MEMORY_NONCACHED].prot_sect |= PMD_SECT_S;
- mem_types[MT_MEMORY_NONCACHED].prot_pte |= L_PTE_SHARED;
+ mem_types[MT_MEMORY_RWX_NONCACHED].prot_sect |= PMD_SECT_S;
+ mem_types[MT_MEMORY_RWX_NONCACHED].prot_pte |= L_PTE_SHARED;
}
}
@@ -502,15 +502,15 @@ static void __init build_mem_type_table(void)
if (cpu_arch >= CPU_ARCH_ARMv6) {
if (cpu_arch >= CPU_ARCH_ARMv7 && (cr & CR_TRE)) {
/* Non-cacheable Normal is XCB = 001 */
- mem_types[MT_MEMORY_NONCACHED].prot_sect |=
+ mem_types[MT_MEMORY_RWX_NONCACHED].prot_sect |=
PMD_SECT_BUFFERED;
} else {
/* For both ARMv6 and non-TEX-remapping ARMv7 */
- mem_types[MT_MEMORY_NONCACHED].prot_sect |=
+ mem_types[MT_MEMORY_RWX_NONCACHED].prot_sect |=
PMD_SECT_TEX(1);
}
} else {
- mem_types[MT_MEMORY_NONCACHED].prot_sect |= PMD_SECT_BUFFERABLE;
+ mem_types[MT_MEMORY_RWX_NONCACHED].prot_sect |= PMD_SECT_BUFFERABLE;
}
#ifdef CONFIG_ARM_LPAE
@@ -543,10 +543,10 @@ static void __init build_mem_type_table(void)
mem_types[MT_LOW_VECTORS].prot_l1 |= ecc_mask;
mem_types[MT_HIGH_VECTORS].prot_l1 |= ecc_mask;
- mem_types[MT_MEMORY].prot_sect |= ecc_mask | cp->pmd;
- mem_types[MT_MEMORY].prot_pte |= kern_pgprot;
+ mem_types[MT_MEMORY_RWX].prot_sect |= ecc_mask | cp->pmd;
+ mem_types[MT_MEMORY_RWX].prot_pte |= kern_pgprot;
mem_types[MT_MEMORY_DMA_READY].prot_pte |= kern_pgprot;
- mem_types[MT_MEMORY_NONCACHED].prot_sect |= ecc_mask;
+ mem_types[MT_MEMORY_RWX_NONCACHED].prot_sect |= ecc_mask;
mem_types[MT_ROM].prot_sect |= cp->pmd;
switch (cp->pmd) {
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