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| author | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2016-01-09 17:32:50 +0100 |
|---|---|---|
| committer | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2016-01-16 21:06:46 +0100 |
| commit | f53830e74ede7c15740e13d9620dafb335c522ce (patch) | |
| tree | 253d2714fca0ec2dabbfe22d29f050d804099a93 /arch/mips | |
| parent | 0c7fd8f4660ed612db5d9e9343f77edfe5af090b (diff) | |
MIPS: kconfig: add option for MIPS_L1_CACHE_SHIFT
Add Kconfig symbol for L1 cache shift like the kernel does.
The value of CONFIG_SYS_CACHELINE_SIZE is not a reliable source
for ARCH_DMA_MINALIGN anymore, because it is optional on MIPS.
If CONFIG_SYS_CACHELINE_SIZE is not defined by a board, the
cache sizes are automatically detected and ARCH_DMA_MINALIGN
would be set to 128 Bytes.
The default value for CONFIG_MIPS_L1_CACHE_SHIFT is 5 which
corresponds to 32 Bytes. All current MIPS boards already used
that value. While on it, fix the Malta board to use a value of 6
like the kernel port does.
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/Kconfig | 21 | ||||
| -rw-r--r-- | arch/mips/include/asm/cache.h | 14 |
2 files changed, 25 insertions, 10 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 388e4c0f0d..1b39c4c0c6 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -28,6 +28,7 @@ config TARGET_MALTA select SUPPORTS_CPU_MIPS32_R1 select SUPPORTS_CPU_MIPS32_R2 select SWAP_IO_SPACE + select MIPS_L1_CACHE_SHIFT_6 config TARGET_VCT bool "Support vct" @@ -196,6 +197,26 @@ config SWAP_IO_SPACE config SYS_MIPS_CACHE_INIT_RAM_LOAD bool +config MIPS_L1_CACHE_SHIFT_4 + bool + +config MIPS_L1_CACHE_SHIFT_5 + bool + +config MIPS_L1_CACHE_SHIFT_6 + bool + +config MIPS_L1_CACHE_SHIFT_7 + bool + +config MIPS_L1_CACHE_SHIFT + int + default "7" if MIPS_L1_CACHE_SHIFT_7 + default "6" if MIPS_L1_CACHE_SHIFT_6 + default "5" if MIPS_L1_CACHE_SHIFT_5 + default "4" if MIPS_L1_CACHE_SHIFT_4 + default "5" + endif endmenu diff --git a/arch/mips/include/asm/cache.h b/arch/mips/include/asm/cache.h index 0dfb54ef4d..806bd26ba9 100644 --- a/arch/mips/include/asm/cache.h +++ b/arch/mips/include/asm/cache.h @@ -7,15 +7,9 @@ #ifndef __MIPS_CACHE_H__ #define __MIPS_CACHE_H__ -/* - * The maximum L1 data cache line size on MIPS seems to be 128 bytes. We use - * that as a default for aligning DMA buffers unless the board config has - * specified another cache line size. - */ -#ifdef CONFIG_SYS_CACHELINE_SIZE -#define ARCH_DMA_MINALIGN CONFIG_SYS_CACHELINE_SIZE -#else -#define ARCH_DMA_MINALIGN 128 -#endif +#define L1_CACHE_SHIFT CONFIG_MIPS_L1_CACHE_SHIFT +#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) + +#define ARCH_DMA_MINALIGN (L1_CACHE_BYTES) #endif /* __MIPS_CACHE_H__ */ |