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>

2 files changed, 3 insertions, 7 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 587da5e0990f..f5f83ee60411 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -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
diff --git a/arch/powerpc/include/asm/types.h b/arch/powerpc/include/asm/types.h
index d3374bc865ba..c646f34c4e8b 100644
--- a/arch/powerpc/include/asm/types.h
+++ b/arch/powerpc/include/asm/types.h
@@ -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