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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)
This commit is contained in:
David Hendricks 2013-03-19 17:57:59 -07:00
parent a54efdcf8c
commit 758abdd75b
1 changed files with 24 additions and 4 deletions
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28
src/arch/armv7/lib/cache.c
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@ -77,7 +77,8 @@ void icache_invalidate_all(void)
enum dcache_op { enum dcache_op {
OP_DCCISW, OP_DCCISW,
OP_DCISW OP_DCISW,
OP_DCCIMVAC,
}; };
/* /*
@ -169,13 +170,32 @@ static unsigned int line_bytes(void)
return size; return size;
} }
void dcache_clean_invalidate_by_mva(unsigned long addr, unsigned long len) /*
* Do a dcache operation by modified virtual address. This is useful for
* maintaining coherency in drivers which do DMA transfers and only need to
* perform cache maintenance on a particular memory range rather than the
* entire cache.
*/
static void dcache_op_mva(unsigned long addr,
unsigned long len, enum dcache_op op)
{ {
unsigned long line, i; unsigned long line, i;
line = line_bytes(); line = line_bytes();
for (i = addr & ~(line - 1); i < addr + len - 1; i += line) for (i = addr & ~(line - 1); i < addr + len - 1; i += line) {
dccimvac(addr); switch(op) {
case OP_DCCIMVAC:
dccimvac(addr);
break;
default:
break;
}
}
}
void dcache_clean_invalidate_by_mva(unsigned long addr, unsigned long len)
{
dcache_op_mva(addr, len, OP_DCCIMVAC);
} }
void armv7_invalidate_caches(void) void armv7_invalidate_caches(void)