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| author | Steven J. Magnani | 2010-05-13 17:48:27 +0200 |
|---|---|---|
| committer | Michal Simek | 2010-08-04 10:22:34 +0200 |
| commit | ba9c4f88d747836bf35c3eee36aa18d2e164f493 (patch) | |
| tree | d244c9946b40af1ea21a1b71d3e49efa513bb4b7 /arch/microblaze/include/asm/page.h | |
| parent | microblaze: Trace hardirqs (diff) | |
| download | kernel-qcow2-linux-ba9c4f88d747836bf35c3eee36aa18d2e164f493.tar.gz kernel-qcow2-linux-ba9c4f88d747836bf35c3eee36aa18d2e164f493.tar.xz kernel-qcow2-linux-ba9c4f88d747836bf35c3eee36aa18d2e164f493.zip | |
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/asm/page.h')
| -rw-r--r-- | arch/microblaze/include/asm/page.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h index 464ff32bee3d..c12c6dfafd9f 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)) |