diff options
| author | Jungseok Lee <jays.lee@samsung.com> | 2014-05-12 10:40:38 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2014-07-23 15:27:21 +0100 |
| commit | e41ceed035966d593ae34c3de33924965a6b9fba (patch) | |
| tree | 505e26883b4914fa6b131902cd6a4b5f9dccc7b2 /arch/arm64/include/asm/memory.h | |
| parent | 7edd88ad7e59c2b7b49da0e00f251884fb785d4f (diff) | |
arm64: Introduce VA_BITS and translation level options
This patch adds virtual address space size and a level of translation
tables to kernel configuration. It facilicates introduction of
different MMU options, such as 4KB + 4 levels, 16KB + 4 levels and
64KB + 3 levels, easily.
The idea is based on the discussion with Catalin Marinas:
http://www.spinics.net/linux/lists/arm-kernel/msg319552.html
Signed-off-by: Jungseok Lee <jays.lee@samsung.com>
Reviewed-by: Sungjinn Chung <sungjinn.chung@samsung.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Jungseok Lee <jungseoklee85@gmail.com>
Diffstat (limited to 'arch/arm64/include/asm/memory.h')
| -rw-r--r-- | arch/arm64/include/asm/memory.h | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index 993bce527b8..45ad6cf678d 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -41,11 +41,7 @@ * The module space lives between the addresses given by TASK_SIZE * and PAGE_OFFSET - it must be within 128MB of the kernel text. */ -#ifdef CONFIG_ARM64_64K_PAGES -#define VA_BITS (42) -#else -#define VA_BITS (39) -#endif +#define VA_BITS (CONFIG_ARM64_VA_BITS) #define PAGE_OFFSET (UL(0xffffffffffffffff) << (VA_BITS - 1)) #define MODULES_END (PAGE_OFFSET) #define MODULES_VADDR (MODULES_END - SZ_64M) |