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Message-Id: <1295891761-18366-16-git-send-email-catalin.marinas@arm.com>
Date: Mon, 24 Jan 2011 17:55:57 +0000
From: Catalin Marinas <catalin.marinas@....com>
To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: Will Deacon <will.deacon@....com>
Subject: [PATCH v4 15/19] ARM: LPAE: use phys_addr_t instead of unsigned long for physical addresses
From: Will Deacon <will.deacon@....com>
The unsigned long datatype is not sufficient for mapping physical addresses
>= 4GB.
This patch ensures that the phys_addr_t datatype is used to represent
physical addresses which may be beyond the range of an unsigned long.
The virt <-> phys macros are updated accordingly to ensure that virtual
addresses can remain as they are.
Signed-off-by: Will Deacon <will.deacon@....com>
Signed-off-by: Catalin Marinas <catalin.marinas@....com>
---
arch/arm/include/asm/memory.h | 17 +++++++++--------
arch/arm/include/asm/outercache.h | 14 ++++++++------
arch/arm/include/asm/pgtable.h | 2 +-
arch/arm/include/asm/setup.h | 2 +-
arch/arm/kernel/setup.c | 5 +++--
arch/arm/mm/init.c | 6 +++---
arch/arm/mm/mmu.c | 7 ++++---
7 files changed, 29 insertions(+), 24 deletions(-)
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index d0ee74b..44ea5cd 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -15,6 +15,7 @@
#include <linux/compiler.h>
#include <linux/const.h>
+#include <linux/types.h>
#include <mach/memory.h>
#include <asm/sizes.h>
@@ -138,15 +139,15 @@
* files. Use virt_to_phys/phys_to_virt/__pa/__va instead.
*/
#ifndef __virt_to_phys
-#define __virt_to_phys(x) ((x) - PAGE_OFFSET + PHYS_OFFSET)
-#define __phys_to_virt(x) ((x) - PHYS_OFFSET + PAGE_OFFSET)
+#define __virt_to_phys(x) (((phys_addr_t)(x) - PAGE_OFFSET + PHYS_OFFSET))
+#define __phys_to_virt(x) ((unsigned long)((x) - PHYS_OFFSET + PAGE_OFFSET))
#endif
/*
* Convert a physical address to a Page Frame Number and back
*/
-#define __phys_to_pfn(paddr) ((paddr) >> PAGE_SHIFT)
-#define __pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)
+#define __phys_to_pfn(paddr) ((unsigned long)((paddr) >> PAGE_SHIFT))
+#define __pfn_to_phys(pfn) ((phys_addr_t)(pfn) << PAGE_SHIFT)
/*
* Convert a page to/from a physical address
@@ -188,21 +189,21 @@
* translation for translating DMA addresses. Use the driver
* DMA support - see dma-mapping.h.
*/
-static inline unsigned long virt_to_phys(const volatile void *x)
+static inline phys_addr_t virt_to_phys(const volatile void *x)
{
return __virt_to_phys((unsigned long)(x));
}
-static inline void *phys_to_virt(unsigned long x)
+static inline void *phys_to_virt(phys_addr_t x)
{
- return (void *)(__phys_to_virt((unsigned long)(x)));
+ return (void *)(__phys_to_virt(x));
}
/*
* Drivers should NOT use these either.
*/
#define __pa(x) __virt_to_phys((unsigned long)(x))
-#define __va(x) ((void *)__phys_to_virt((unsigned long)(x)))
+#define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x)))
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
/*
diff --git a/arch/arm/include/asm/outercache.h b/arch/arm/include/asm/outercache.h
index fc19009..88ad892 100644
--- a/arch/arm/include/asm/outercache.h
+++ b/arch/arm/include/asm/outercache.h
@@ -21,6 +21,8 @@
#ifndef __ASM_OUTERCACHE_H
#define __ASM_OUTERCACHE_H
+#include <linux/types.h>
+
struct outer_cache_fns {
void (*inv_range)(unsigned long, unsigned long);
void (*clean_range)(unsigned long, unsigned long);
@@ -37,17 +39,17 @@ struct outer_cache_fns {
extern struct outer_cache_fns outer_cache;
-static inline void outer_inv_range(unsigned long start, unsigned long end)
+static inline void outer_inv_range(phys_addr_t start, phys_addr_t end)
{
if (outer_cache.inv_range)
outer_cache.inv_range(start, end);
}
-static inline void outer_clean_range(unsigned long start, unsigned long end)
+static inline void outer_clean_range(phys_addr_t start, phys_addr_t end)
{
if (outer_cache.clean_range)
outer_cache.clean_range(start, end);
}
-static inline void outer_flush_range(unsigned long start, unsigned long end)
+static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
{
if (outer_cache.flush_range)
outer_cache.flush_range(start, end);
@@ -73,11 +75,11 @@ static inline void outer_disable(void)
#else
-static inline void outer_inv_range(unsigned long start, unsigned long end)
+static inline void outer_inv_range(phys_addr_t start, phys_addr_t end)
{ }
-static inline void outer_clean_range(unsigned long start, unsigned long end)
+static inline void outer_clean_range(phys_addr_t start, phys_addr_t end)
{ }
-static inline void outer_flush_range(unsigned long start, unsigned long end)
+static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
{ }
static inline void outer_flush_all(void) { }
static inline void outer_inv_all(void) { }
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
index 40b21c1..110f6f4 100644
--- a/arch/arm/include/asm/pgtable.h
+++ b/arch/arm/include/asm/pgtable.h
@@ -273,7 +273,7 @@ static inline pte_t *pmd_page_vaddr(pmd_t pmd)
#define pte_unmap(pte) __pte_unmap(pte)
#define pte_pfn(pte) ((pte_val(pte) & PHYS_MASK) >> PAGE_SHIFT)
-#define pfn_pte(pfn,prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
+#define pfn_pte(pfn,prot) __pte(((phys_addr_t)(pfn) << PAGE_SHIFT) | pgprot_val(prot))
#define pte_page(pte) pfn_to_page(pte_pfn(pte))
#define mk_pte(page,prot) pfn_pte(page_to_pfn(page), prot)
diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h
index f1e5a9b..5092118 100644
--- a/arch/arm/include/asm/setup.h
+++ b/arch/arm/include/asm/setup.h
@@ -199,7 +199,7 @@ static struct tagtable __tagtable_##fn __tag = { tag, fn }
#endif
struct membank {
- unsigned long start;
+ phys_addr_t start;
unsigned long size;
unsigned int highmem;
};
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 3d23f0f..fe951e4 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -443,7 +443,7 @@ static struct machine_desc * __init setup_machine(unsigned int nr)
return list;
}
-static int __init arm_add_memory(unsigned long start, unsigned long size)
+static int __init arm_add_memory(phys_addr_t start, unsigned long size)
{
struct membank *bank = &meminfo.bank[meminfo.nr_banks];
@@ -479,7 +479,8 @@ static int __init arm_add_memory(unsigned long start, unsigned long size)
static int __init early_mem(char *p)
{
static int usermem __initdata = 0;
- unsigned long size, start;
+ unsigned long size;
+ phys_addr_t start;
char *endp;
/*
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 5164069..14a00a1 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -344,7 +344,7 @@ void __init bootmem_init(void)
*/
arm_bootmem_free(min, max_low, max_high);
- high_memory = __va((max_low << PAGE_SHIFT) - 1) + 1;
+ high_memory = __va(((phys_addr_t)max_low << PAGE_SHIFT) - 1) + 1;
/*
* This doesn't seem to be used by the Linux memory manager any
@@ -392,8 +392,8 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
* Convert to physical addresses, and
* round start upwards and end downwards.
*/
- pg = PAGE_ALIGN(__pa(start_pg));
- pgend = __pa(end_pg) & PAGE_MASK;
+ pg = (unsigned long)PAGE_ALIGN(__pa(start_pg));
+ pgend = (unsigned long)__pa(end_pg) & PAGE_MASK;
/*
* If there are free pages between these,
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 251056a..a1d8a07 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -611,7 +611,7 @@ static void __init create_36bit_mapping(struct map_desc *md,
pgd_t *pgd;
addr = md->virtual;
- phys = (unsigned long)__pfn_to_phys(md->pfn);
+ phys = __pfn_to_phys(md->pfn);
length = PAGE_ALIGN(md->length);
if (!(cpu_architecture() >= CPU_ARCH_ARMv6 || cpu_is_xsc3())) {
@@ -672,7 +672,8 @@ static void __init create_36bit_mapping(struct map_desc *md,
*/
static void __init create_mapping(struct map_desc *md)
{
- unsigned long phys, addr, length, end;
+ unsigned long addr, length, end;
+ phys_addr_t phys;
const struct mem_type *type;
pgd_t *pgd;
@@ -703,7 +704,7 @@ static void __init create_mapping(struct map_desc *md)
#endif
addr = md->virtual & PAGE_MASK;
- phys = (unsigned long)__pfn_to_phys(md->pfn);
+ phys = __pfn_to_phys(md->pfn);
length = PAGE_ALIGN(md->length + (md->virtual & ~PAGE_MASK));
if (type->prot_l1 == 0 && ((addr | phys | length) & ~SECTION_MASK)) {
--
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