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nios2: convert cache flush to use dm cpu data

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Convert cache flush to use dm cpu data.

The original cache flush functions are written in assembly
and use CONFIG_SYS_{I,D}CACHE_SIZE... macros. It is difficult
to convert to use cache configuration in dm cpu data which is
extracted from device tree.

The cacheflush.c of Linux nios2 arch uses cpuinfo structure,
which is very close to our dm cpu data. So we copy and modify
it to arch/nios2/lib/cache.c to replace the old cache.S.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
This commit is contained in:
Thomas Chou
2015-10-23 07:58:20 +08:00
parent 55e2b4d4e5
commit 21ff7344d1
5 changed files with 133 additions and 98 deletions
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13
arch/nios2/include/asm/cache.h
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@@ -8,18 +8,11 @@
#ifndef __ASM_NIOS2_CACHE_H_
#define __ASM_NIOS2_CACHE_H_
extern void flush_dcache (unsigned long start, unsigned long size);
extern void flush_icache (unsigned long start, unsigned long size);
/*
* Valid L1 data cache line sizes for the NIOS2 architecture are 4, 16, and 32
* bytes. If the board configuration has not specified one we default to the
* largest of these values for alignment of DMA buffers.
* Valid L1 data cache line sizes for the NIOS2 architecture are 4,
* 16, and 32 bytes. We default to the largest of these values for
* alignment of DMA buffers.
*/
#ifdef CONFIG_SYS_CACHELINE_SIZE
#define ARCH_DMA_MINALIGN CONFIG_SYS_CACHELINE_SIZE
#else
#define ARCH_DMA_MINALIGN 32
#endif
#endif /* __ASM_NIOS2_CACHE_H_ */