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authorRussell King <rmk+kernel@arm.linux.org.uk>2010-11-16 00:22:09 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-11-26 20:45:47 +0000
commitf6e3354d02aa1f30672e3671098c12cb49c7da25 (patch)
tree63e5731ea85afae946d8d393b7faeb7f84b02ee3 /arch
parent97092e0c56830457af0639f6bd904537a150ea4a (diff)
downloadlinux-f6e3354d02aa1f30672e3671098c12cb49c7da25.tar.gz
ARM: pgtable: introduce pteval_t to represent a pte value
This makes everywhere dealing with pte values use the same type. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/include/asm/page.h6
-rw-r--r--arch/arm/include/asm/pgtable.h41
-rw-r--r--arch/arm/mm/fault-armv.c2
-rw-r--r--arch/arm/mm/mm.h2
-rw-r--r--arch/arm/mm/mmu.c2
5 files changed, 28 insertions, 25 deletions
diff --git a/arch/arm/include/asm/page.h b/arch/arm/include/asm/page.h
index a485ac3c869..f51a69595f6 100644
--- a/arch/arm/include/asm/page.h
+++ b/arch/arm/include/asm/page.h
@@ -151,13 +151,15 @@ extern void __cpu_copy_user_highpage(struct page *to, struct page *from,
#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
extern void copy_page(void *to, const void *from);
+typedef unsigned long pteval_t;
+
#undef STRICT_MM_TYPECHECKS
#ifdef STRICT_MM_TYPECHECKS
/*
* These are used to make use of C type-checking..
*/
-typedef struct { unsigned long pte; } pte_t;
+typedef struct { pteval_t pte; } pte_t;
typedef struct { unsigned long pmd; } pmd_t;
typedef struct { unsigned long pgd[2]; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
@@ -175,7 +177,7 @@ typedef struct { unsigned long pgprot; } pgprot_t;
/*
* .. while these make it easier on the compiler
*/
-typedef unsigned long pte_t;
+typedef pteval_t pte_t;
typedef unsigned long pmd_t;
typedef unsigned long pgd_t[2];
typedef unsigned long pgprot_t;
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
index 30b3a07dd99..50eb0b4278e 100644
--- a/arch/arm/include/asm/pgtable.h
+++ b/arch/arm/include/asm/pgtable.h
@@ -10,6 +10,7 @@
#ifndef _ASMARM_PGTABLE_H
#define _ASMARM_PGTABLE_H
+#include <linux/const.h>
#include <asm-generic/4level-fixup.h>
#include <asm/proc-fns.h>
@@ -161,30 +162,30 @@ extern void __pgd_error(const char *file, int line, pgd_t);
* The PTE table pointer refers to the hardware entries; the "Linux"
* entries are stored 1024 bytes below.
*/
-#define L_PTE_PRESENT (1 << 0)
-#define L_PTE_YOUNG (1 << 1)
-#define L_PTE_FILE (1 << 2) /* only when !PRESENT */
-#define L_PTE_DIRTY (1 << 6)
-#define L_PTE_WRITE (1 << 7)
-#define L_PTE_USER (1 << 8)
-#define L_PTE_EXEC (1 << 9)
-#define L_PTE_SHARED (1 << 10) /* shared(v6), coherent(xsc3) */
+#define L_PTE_PRESENT (_AT(pteval_t, 1) << 0)
+#define L_PTE_YOUNG (_AT(pteval_t, 1) << 1)
+#define L_PTE_FILE (_AT(pteval_t, 1) << 2) /* only when !PRESENT */
+#define L_PTE_DIRTY (_AT(pteval_t, 1) << 6)
+#define L_PTE_WRITE (_AT(pteval_t, 1) << 7)
+#define L_PTE_USER (_AT(pteval_t, 1) << 8)
+#define L_PTE_EXEC (_AT(pteval_t, 1) << 9)
+#define L_PTE_SHARED (_AT(pteval_t, 1) << 10) /* shared(v6), coherent(xsc3) */
/*
* These are the memory types, defined to be compatible with
* pre-ARMv6 CPUs cacheable and bufferable bits: XXCB
*/
-#define L_PTE_MT_UNCACHED (0x00 << 2) /* 0000 */
-#define L_PTE_MT_BUFFERABLE (0x01 << 2) /* 0001 */
-#define L_PTE_MT_WRITETHROUGH (0x02 << 2) /* 0010 */
-#define L_PTE_MT_WRITEBACK (0x03 << 2) /* 0011 */
-#define L_PTE_MT_MINICACHE (0x06 << 2) /* 0110 (sa1100, xscale) */
-#define L_PTE_MT_WRITEALLOC (0x07 << 2) /* 0111 */
-#define L_PTE_MT_DEV_SHARED (0x04 << 2) /* 0100 */
-#define L_PTE_MT_DEV_NONSHARED (0x0c << 2) /* 1100 */
-#define L_PTE_MT_DEV_WC (0x09 << 2) /* 1001 */
-#define L_PTE_MT_DEV_CACHED (0x0b << 2) /* 1011 */
-#define L_PTE_MT_MASK (0x0f << 2)
+#define L_PTE_MT_UNCACHED (_AT(pteval_t, 0x00) << 2) /* 0000 */
+#define L_PTE_MT_BUFFERABLE (_AT(pteval_t, 0x01) << 2) /* 0001 */
+#define L_PTE_MT_WRITETHROUGH (_AT(pteval_t, 0x02) << 2) /* 0010 */
+#define L_PTE_MT_WRITEBACK (_AT(pteval_t, 0x03) << 2) /* 0011 */
+#define L_PTE_MT_MINICACHE (_AT(pteval_t, 0x06) << 2) /* 0110 (sa1100, xscale) */
+#define L_PTE_MT_WRITEALLOC (_AT(pteval_t, 0x07) << 2) /* 0111 */
+#define L_PTE_MT_DEV_SHARED (_AT(pteval_t, 0x04) << 2) /* 0100 */
+#define L_PTE_MT_DEV_NONSHARED (_AT(pteval_t, 0x0c) << 2) /* 1100 */
+#define L_PTE_MT_DEV_WC (_AT(pteval_t, 0x09) << 2) /* 1001 */
+#define L_PTE_MT_DEV_CACHED (_AT(pteval_t, 0x0b) << 2) /* 1011 */
+#define L_PTE_MT_MASK (_AT(pteval_t, 0x0f) << 2)
#ifndef __ASSEMBLY__
@@ -405,7 +406,7 @@ static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
- const unsigned long mask = L_PTE_EXEC | L_PTE_WRITE | L_PTE_USER;
+ const pteval_t mask = L_PTE_EXEC | L_PTE_WRITE | L_PTE_USER;
pte_val(pte) = (pte_val(pte) & ~mask) | (pgprot_val(newprot) & mask);
return pte;
}
diff --git a/arch/arm/mm/fault-armv.c b/arch/arm/mm/fault-armv.c
index 83e59f87042..01210dba022 100644
--- a/arch/arm/mm/fault-armv.c
+++ b/arch/arm/mm/fault-armv.c
@@ -26,7 +26,7 @@
#include "mm.h"
-static unsigned long shared_pte_mask = L_PTE_MT_BUFFERABLE;
+static pteval_t shared_pte_mask = L_PTE_MT_BUFFERABLE;
#if __LINUX_ARM_ARCH__ < 6
/*
diff --git a/arch/arm/mm/mm.h b/arch/arm/mm/mm.h
index 6630620380a..36960df5fb7 100644
--- a/arch/arm/mm/mm.h
+++ b/arch/arm/mm/mm.h
@@ -16,7 +16,7 @@ static inline pmd_t *pmd_off_k(unsigned long virt)
}
struct mem_type {
- unsigned int prot_pte;
+ pteval_t prot_pte;
unsigned int prot_l1;
unsigned int prot_sect;
unsigned int domain;
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 9568f8632ae..94ee0930d69 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -62,7 +62,7 @@ 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 = {