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| author | Steven J. Magnani <steve@digidescorp.com> | 2010-05-13 15:48:27 (GMT) |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2010-08-04 08:22:34 (GMT) |
| commit | ba9c4f88d747836bf35c3eee36aa18d2e164f493 (patch) | |
| tree | d244c9946b40af1ea21a1b71d3e49efa513bb4b7 /arch/microblaze/include | |
| parent | 0d9ec762af297f1ef38114f9498322d994063802 (diff) | |
| download | linux-ba9c4f88d747836bf35c3eee36aa18d2e164f493.tar.xz | |
microblaze: Allow PAGE_SIZE configuration
Allow developer to configure memory page size at compile time.
Larger pages can improve performance on some workloads.
Based on PowerPC code.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/include')
| -rw-r--r-- | arch/microblaze/include/asm/elf.h | 2 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/page.h | 12 |
2 files changed, 11 insertions, 3 deletions
diff --git a/arch/microblaze/include/asm/elf.h b/arch/microblaze/include/asm/elf.h index 7d4acf2..732caf1 100644 --- a/arch/microblaze/include/asm/elf.h +++ b/arch/microblaze/include/asm/elf.h @@ -77,7 +77,7 @@ typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; #define ELF_DATA ELFDATA2MSB #endif -#define ELF_EXEC_PAGESIZE 4096 +#define ELF_EXEC_PAGESIZE PAGE_SIZE #define ELF_CORE_COPY_REGS(_dest, _regs) \ diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h index 464ff32..c12c6df 100644 --- a/arch/microblaze/include/asm/page.h +++ b/arch/microblaze/include/asm/page.h @@ -23,8 +23,16 @@ #ifdef __KERNEL__ /* PAGE_SHIFT determines the page size */ -#define PAGE_SHIFT (12) -#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) +#if defined(CONFIG_MICROBLAZE_32K_PAGES) +#define PAGE_SHIFT 15 +#elif defined(CONFIG_MICROBLAZE_16K_PAGES) +#define PAGE_SHIFT 14 +#elif defined(CONFIG_MICROBLAZE_8K_PAGES) +#define PAGE_SHIFT 13 +#else +#define PAGE_SHIFT 12 +#endif +#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) #define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR)) |