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arm: add MT_DEVICE_STRONGLY_ORDERED mem type

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黄涛
2011-08-19 10:06:21 +08:00
parent a439265b2e
commit 6e5474ed24
2 changed files with 8 additions and 0 deletions
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1
arch/arm/include/asm/mach/map.h
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@@ -27,6 +27,7 @@ struct map_desc {
#define MT_MEMORY 9
#define MT_ROM 10
#define MT_MEMORY_NONCACHED 11
#define MT_DEVICE_STRONGLY_ORDERED 12
#ifdef CONFIG_MMU
extern void iotable_init(struct map_desc *, int);

7
arch/arm/mm/mmu.c
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@@ -212,6 +212,12 @@ static struct mem_type mem_types[] = {
.prot_l1 = PMD_TYPE_TABLE,
.prot_sect = PROT_SECT_DEVICE | PMD_SECT_WB,
.domain = DOMAIN_IO,
},
[MT_DEVICE_STRONGLY_ORDERED] = { /* Guaranteed strongly ordered */
.prot_pte = PROT_PTE_DEVICE,
.prot_l1 = PMD_TYPE_TABLE,
.prot_sect = PROT_SECT_DEVICE | PMD_SECT_UNCACHED,
.domain = DOMAIN_IO,
},
[MT_DEVICE_WC] = { /* ioremap_wc */
.prot_pte = PROT_PTE_DEVICE | L_PTE_MT_DEV_WC,
@@ -338,6 +344,7 @@ static void __init build_mem_type_table(void)
mem_types[MT_DEVICE_NONSHARED].prot_sect |= PMD_SECT_XN;
mem_types[MT_DEVICE_CACHED].prot_sect |= PMD_SECT_XN;
mem_types[MT_DEVICE_WC].prot_sect |= PMD_SECT_XN;
mem_types[MT_DEVICE_STRONGLY_ORDERED].prot_sect |= PMD_SECT_XN;
}
if (cpu_arch >= CPU_ARCH_ARMv7 && (cr & CR_TRE)) {
/*