[coreboot-gerrit] New patch to review for coreboot: 55d9fba armv7: add a helper function for dcache ops by MVA
David Hendricks (dhendrix@chromium.org)
gerrit at coreboot.org
Wed Mar 20 22:48:16 CET 2013
David Hendricks (dhendrix at chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2870
-gerrit
commit 55d9fba217938da3a2b22583c3cc223ae4828295
Author: David Hendricks <dhendrix at chromium.org>
Date: Tue Mar 19 17:57:59 2013 -0700
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 at chromium.org>
---
src/arch/armv7/lib/cache.c | 28 ++++++++++++++++++++++++----
1 file changed, 24 insertions(+), 4 deletions(-)
diff --git a/src/arch/armv7/lib/cache.c b/src/arch/armv7/lib/cache.c
index d413bc4..8fb238a 100644
--- a/src/arch/armv7/lib/cache.c
+++ b/src/arch/armv7/lib/cache.c
@@ -77,7 +77,8 @@ void icache_invalidate_all(void)
enum dcache_op {
OP_DCCISW,
- OP_DCISW
+ OP_DCISW,
+ OP_DCCIMVAC,
};
/*
@@ -169,13 +170,32 @@ static unsigned int line_bytes(void)
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;
line = line_bytes();
- for (i = addr & ~(line - 1); i < addr + len - 1; i += line)
- dccimvac(addr);
+ for (i = addr & ~(line - 1); i < addr + len - 1; i += line) {
+ 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)
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