armv7: add a helper function for dcache ops by MVA
This adds a helper function for dcache ops by MVA which will perform the specified operation on a given memory range. This will make it more trivial to add other data cache maintenance routines. Change-Id: I01d746d5fd2f4138257ca9cab9e9d738e73f8633 Signed-off-by: David Hendricks <dhendrix@chromium.org> Reviewed-on: http://review.coreboot.org/2870 Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Tested-by: build bot (Jenkins)
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@ -77,7 +77,8 @@ void icache_invalidate_all(void)
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enum dcache_op {
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OP_DCCISW,
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OP_DCISW
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OP_DCISW,
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OP_DCCIMVAC,
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};
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/*
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@ -169,13 +170,32 @@ static unsigned int line_bytes(void)
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return size;
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}
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void dcache_clean_invalidate_by_mva(unsigned long addr, unsigned long len)
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/*
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* Do a dcache operation by modified virtual address. This is useful for
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* maintaining coherency in drivers which do DMA transfers and only need to
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* perform cache maintenance on a particular memory range rather than the
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* entire cache.
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*/
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static void dcache_op_mva(unsigned long addr,
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unsigned long len, enum dcache_op op)
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{
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unsigned long line, i;
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line = line_bytes();
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for (i = addr & ~(line - 1); i < addr + len - 1; i += line)
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dccimvac(addr);
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for (i = addr & ~(line - 1); i < addr + len - 1; i += line) {
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switch(op) {
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case OP_DCCIMVAC:
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dccimvac(addr);
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break;
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default:
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break;
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}
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}
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}
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void dcache_clean_invalidate_by_mva(unsigned long addr, unsigned long len)
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{
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dcache_op_mva(addr, len, OP_DCCIMVAC);
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}
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void armv7_invalidate_caches(void)
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