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authorLinus Walleij <linus.walleij@stericsson.com>2010-07-12 21:50:59 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-07-18 20:29:47 +0100
commitcb9d7707cd9be57830f31616233f6a872ca8416d (patch)
tree6b380a5fc3c0f8efcc97455ee85a08da1d6ce4f9
parentf159f4ed55bb0fa5470800641e03a13a7e0eae6e (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>
-rw-r--r--arch/arm/include/asm/mach/map.h2
-rw-r--r--arch/arm/kernel/tcm.c5
-rw-r--r--arch/arm/mm/mmu.c13
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)