diff options
| author | Linus Walleij <linus.walleij@stericsson.com> | 2010-07-12 21:50:59 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-07-18 20:29:47 +0100 |
| commit | cb9d7707cd9be57830f31616233f6a872ca8416d (patch) | |
| tree | 6b380a5fc3c0f8efcc97455ee85a08da1d6ce4f9 /arch | |
| parent | f159f4ed55bb0fa5470800641e03a13a7e0eae6e (diff) | |
ARM: 6222/1: add memory types for the TCMs
The earlier TCM memory regions were mapped as MT_MEMORY_UNCACHED
which doesn't really work on platforms supporting the new v6
features like the NX bit. Add unique MT_MEMORY_[I|D]TCM types
instead.
Cc: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/include/asm/mach/map.h | 2 | ||||
| -rw-r--r-- | arch/arm/kernel/tcm.c | 5 | ||||
| -rw-r--r-- | arch/arm/mm/mmu.c | 13 |
3 files changed, 17 insertions, 3 deletions
diff --git a/arch/arm/include/asm/mach/map.h b/arch/arm/include/asm/mach/map.h index 742c2aaeb02..d2fedb5aeb1 100644 --- a/arch/arm/include/asm/mach/map.h +++ b/arch/arm/include/asm/mach/map.h @@ -27,6 +27,8 @@ struct map_desc { #define MT_MEMORY 9 #define MT_ROM 10 #define MT_MEMORY_NONCACHED 11 +#define MT_MEMORY_DTCM 12 +#define MT_MEMORY_ITCM 13 #ifdef CONFIG_MMU extern void iotable_init(struct map_desc *, int); diff --git a/arch/arm/kernel/tcm.c b/arch/arm/kernel/tcm.c index e50303868f1..0c62aa2c86e 100644 --- a/arch/arm/kernel/tcm.c +++ b/arch/arm/kernel/tcm.c @@ -13,7 +13,6 @@ #include <linux/ioport.h> #include <linux/genalloc.h> #include <linux/string.h> /* memcpy */ -#include <asm/page.h> /* PAGE_SHIFT */ #include <asm/cputype.h> #include <asm/mach/map.h> #include <mach/memory.h> @@ -53,7 +52,7 @@ static struct map_desc dtcm_iomap[] __initdata = { .virtual = DTCM_OFFSET, .pfn = __phys_to_pfn(DTCM_OFFSET), .length = (DTCM_END - DTCM_OFFSET + 1), - .type = MT_UNCACHED + .type = MT_MEMORY_DTCM } }; @@ -62,7 +61,7 @@ static struct map_desc itcm_iomap[] __initdata = { .virtual = ITCM_OFFSET, .pfn = __phys_to_pfn(ITCM_OFFSET), .length = (ITCM_END - ITCM_OFFSET + 1), - .type = MT_UNCACHED + .type = MT_MEMORY_ITCM } }; diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 28589417118..e53480148c0 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -258,6 +258,19 @@ static struct mem_type mem_types[] = { .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, + .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_USER | L_PTE_EXEC, + .prot_l1 = PMD_TYPE_TABLE, + .domain = DOMAIN_IO, + }, }; const struct mem_type *get_mem_type(unsigned int type) |