The flush_cache() function in lib/cache.c ignores its arguments and
flushes the complete data and instruction caches. Use the
invalidate/flush_*cache_range() functions instead to only flush the
requested memory region.
This patch does not change the current behavior of U-Boot, since the
implementation of the invalidate/flush_*cache_range() functions flush
the complete data and instruction caches. It is in preparation for CPUs
with the necessary functionality for flushing a selectable memory range.
Signed-off-by: Lukas Auer <lukas.a...@aisec.fraunhofer.de>
---
Changes in v2:
- New patch "riscv: use invalidate/flush_*cache_range functions in
cache.c"
arch/riscv/lib/cache.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/riscv/lib/cache.c b/arch/riscv/lib/cache.c
index 78b19da2c5..5437a122a1 100644
--- a/arch/riscv/lib/cache.c
+++ b/arch/riscv/lib/cache.c
@@ -40,8 +40,8 @@ void cache_flush(void)
void flush_cache(unsigned long addr, unsigned long size)
{
- invalidate_icache_all();
- flush_dcache_all();
+ invalidate_icache_range(addr, addr + size);
+ flush_dcache_range(addr, addr + size);
}
__weak void icache_enable(void)
--
2.20.1
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