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ARM: 6672/1: LPAE: use phys_addr_t instead of unsigned long in mapping functions

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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 when converting from a PFN.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Will Deacon 2011-02-15 12:42:57 +01:00 committed by Russell King
parent ad6b9c9d78
commit cae6292b65
3 changed files with 8 additions and 7 deletions
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2
arch/arm/include/asm/pgtable.h
View file

@ -351,7 +351,7 @@ static inline pte_t *pmd_page_vaddr(pmd_t pmd)
#define pte_unmap(pte) __pte_unmap(pte)
#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)
#define pfn_pte(pfn,prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
#define pfn_pte(pfn,prot) __pte(__pfn_to_phys(pfn) | 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)

6
arch/arm/mm/init.c
View file

@ -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,

7
arch/arm/mm/mmu.c
View file

@ -591,7 +591,7 @@ 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())) {
@ -651,7 +651,8 @@ 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;
@ -680,7 +681,7 @@ static void __init create_mapping(struct map_desc *md)
}
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)) {