generic: add phys_addr_t for holding physical addresses
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>
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 587da5e..f5f83ee 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -22,6 +22,9 @@
config PPC_MERGE
def_bool y
+config ARCH_PHYS_ADDR_T_64BIT
+ def_bool PPC64 || PHYS_64BIT
+
config MMU
bool
default y
diff --git a/arch/powerpc/include/asm/types.h b/arch/powerpc/include/asm/types.h
index d3374bc..c646f34 100644
--- a/arch/powerpc/include/asm/types.h
+++ b/arch/powerpc/include/asm/types.h
@@ -48,13 +48,6 @@
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
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index ed92864..a0ffb51 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -932,6 +932,9 @@
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)"
diff --git a/include/asm-x86/page_32.h b/include/asm-x86/page_32.h
index ab85287..d0e5860 100644
--- a/include/asm-x86/page_32.h
+++ b/include/asm-x86/page_32.h
@@ -33,7 +33,6 @@
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 pudval_t;
typedef unsigned long pgdval_t;
typedef unsigned long pgprotval_t;
-typedef unsigned long phys_addr_t;
typedef union {
pteval_t pte;
diff --git a/include/asm-x86/page_64.h b/include/asm-x86/page_64.h
index c6916c8..2456fbf 100644
--- a/include/asm-x86/page_64.h
+++ b/include/asm-x86/page_64.h
@@ -79,7 +79,6 @@
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;
diff --git a/include/linux/types.h b/include/linux/types.h
index d4a9ce6..022c668 100644
--- a/include/linux/types.h
+++ b/include/linux/types.h
@@ -197,6 +197,12 @@
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;
diff --git a/mm/Kconfig b/mm/Kconfig
index 0bd9c2d..91ee392 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -187,6 +187,9 @@
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