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generic: add phys_addr_t for holding physical addresses

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Add a kernel-wide "phys_addr_t" which is guaranteed to be able to hold
any physical address.  By default it equals the word size of the
architecture, but a 32-bit architecture can set ARCH_PHYS_ADDR_T_64BIT
if it needs a 64-bit phys_addr_t.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jeremy Fitzhardinge 2008-09-11 01:31:45 -07:00 committed by Ingo Molnar
parent 9dfed08eb4
commit 600715dcdf
7 changed files with 15 additions and 10 deletions
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3
arch/powerpc/Kconfig
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@ -22,6 +22,9 @@ config WORD_SIZE
config PPC_MERGE
def_bool y
config ARCH_PHYS_ADDR_T_64BIT
def_bool PPC64 || PHYS_64BIT
config MMU
bool
default y

7
arch/powerpc/include/asm/types.h
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@ -48,13 +48,6 @@ typedef struct {
typedef __vector128 vector128;
/* Physical address used by some IO functions */
#if defined(CONFIG_PPC64) || defined(CONFIG_PHYS_64BIT)
typedef u64 phys_addr_t;
#else
typedef u32 phys_addr_t;
#endif
#ifdef __powerpc64__
typedef u64 dma_addr_t;
#else

3
arch/x86/Kconfig
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@ -932,6 +932,9 @@ config X86_PAE
has the cost of more pagetable lookup overhead, and also
consumes more pagetable space per process.
config ARCH_PHYS_ADDR_T_64BIT
def_bool X86_64 || X86_PAE
# Common NUMA Features
config NUMA
bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)"

2
include/asm-x86/page_32.h
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@ -33,7 +33,6 @@ typedef u64 pmdval_t;
typedef u64 pudval_t;
typedef u64 pgdval_t;
typedef u64 pgprotval_t;
typedef u64 phys_addr_t;
typedef union {
struct {
@ -54,7 +53,6 @@ typedef unsigned long pmdval_t;
typedef unsigned long pudval_t;
typedef unsigned long pgdval_t;
typedef unsigned long pgprotval_t;
typedef unsigned long phys_addr_t;
typedef union {
pteval_t pte;

1
include/asm-x86/page_64.h
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@ -79,7 +79,6 @@ typedef unsigned long pmdval_t;
typedef unsigned long pudval_t;
typedef unsigned long pgdval_t;
typedef unsigned long pgprotval_t;
typedef unsigned long phys_addr_t;
typedef struct page *pgtable_t;

6
include/linux/types.h
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@ -197,6 +197,12 @@ typedef u64 resource_size_t;
typedef u32 resource_size_t;
#endif
#ifdef CONFIG_PHYS_ADDR_T_64BIT
typedef u64 phys_addr_t;
#else
typedef u32 phys_addr_t;
#endif
struct ustat {
__kernel_daddr_t f_tfree;
__kernel_ino_t f_tinode;

3
mm/Kconfig
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@ -187,6 +187,9 @@ config RESOURCES_64BIT
help
This option allows memory and IO resources to be 64 bit.
config PHYS_ADDR_T_64BIT
def_bool 64BIT || ARCH_PHYS_ADDR_T_64BIT
config ZONE_DMA_FLAG
int
default "0" if !ZONE_DMA