From: Franck Bui-Huu <fbuihuu@xxxxxxxxx> Before this patch, when a platform needed to customize one constant in spaces.h, they need to redefine all of them. Now they can just redefine one constant and include the generic file header at the end: #include <asm/mach-generic/spaces.h> This patch doesn't allow to redefine CAC_BASE, IO_BASE and UNCAC_BASE for 32 bits platforms because there's no need to do so. This will avoid some macro duplications. It's important specially if we'll add complex macros. Signed-off-by: Franck Bui-Huu <fbuihuu@xxxxxxxxx> --- include/asm-mips/mach-generic/spaces.h | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-) diff --git a/include/asm-mips/mach-generic/spaces.h b/include/asm-mips/mach-generic/spaces.h index 0ae9997..9a3c521 100644 --- a/include/asm-mips/mach-generic/spaces.h +++ b/include/asm-mips/mach-generic/spaces.h @@ -16,13 +16,18 @@ #define CAC_BASE 0x80000000 #define IO_BASE 0xa0000000 #define UNCAC_BASE 0xa0000000 + +#ifndef MAP_BASE #define MAP_BASE 0xc0000000 +#endif /* * This handles the memory map. * We handle pages at KSEG0 for kernels with 32 bit address space. */ +#ifndef PAGE_OFFSET #define PAGE_OFFSET 0x80000000UL +#endif /* * Memory above this physical address will be considered highmem. @@ -38,11 +43,13 @@ /* * This handles the memory map. */ +#ifndef PAGE_OFFSET #ifdef CONFIG_DMA_NONCOHERENT #define PAGE_OFFSET 0x9800000000000000UL #else #define PAGE_OFFSET 0xa800000000000000UL #endif +#endif /* * Memory above this physical address will be considered highmem. @@ -53,14 +60,25 @@ #define HIGHMEM_START (1UL << 59UL) #endif +#ifndef CAC_BASE #ifdef CONFIG_DMA_NONCOHERENT #define CAC_BASE 0x9800000000000000UL #else #define CAC_BASE 0xa800000000000000UL #endif +#endif + +#ifndef IO_BASE #define IO_BASE 0x9000000000000000UL +#endif + +#ifndef UNCAC_BASE #define UNCAC_BASE 0x9000000000000000UL +#endif + +#ifndef MAP_BASE #define MAP_BASE 0xc000000000000000UL +#endif #define TO_PHYS(x) ( ((x) & TO_PHYS_MASK)) #define TO_CAC(x) (CAC_BASE | ((x) & TO_PHYS_MASK)) -- 1.5.1.rc1.27.g1d848
