riscv: use invalidate/flush_*cache_range functions in cache.c

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.auer@aisec.fraunhofer.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/arch/riscv/lib/cache.c b/arch/riscv/lib/cache.c
index 78b19da..5437a12 100644 (file)
--- 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)