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-rw-r--r--payloads/libpayload/arch/arm/cache.c15
-rw-r--r--payloads/libpayload/include/arm/arch/cache.h3
2 files changed, 12 insertions, 6 deletions
diff --git a/payloads/libpayload/arch/arm/cache.c b/payloads/libpayload/arch/arm/cache.c
index 3944818110..4c222eab73 100644
--- a/payloads/libpayload/arch/arm/cache.c
+++ b/payloads/libpayload/arch/arm/cache.c
@@ -195,17 +195,20 @@ void dcache_invalidate_all(void)
dcache_foreach(OP_DCISW);
}
-static unsigned int line_bytes(void)
+unsigned int dcache_line_bytes(void)
{
uint32_t ccsidr;
- unsigned int size;
+ static unsigned int line_bytes = 0;
+
+ if (line_bytes)
+ return line_bytes;
ccsidr = read_ccsidr();
/* [2:0] - Indicates (Log2(number of words in cache line)) - 2 */
- size = 1 << ((ccsidr & 0x7) + 2); /* words per line */
- size *= sizeof(unsigned int); /* bytes per line */
+ line_bytes = 1 << ((ccsidr & 0x7) + 2); /* words per line */
+ line_bytes *= sizeof(unsigned int); /* bytes per line */
- return size;
+ return line_bytes;
}
/*
@@ -219,7 +222,7 @@ static void dcache_op_mva(void const *vaddr, size_t len, enum dcache_op op)
unsigned long line, linesize;
unsigned long paddr = virt_to_phys(vaddr);
- linesize = line_bytes();
+ linesize = dcache_line_bytes();
line = paddr & ~(linesize - 1);
dsb();
diff --git a/payloads/libpayload/include/arm/arch/cache.h b/payloads/libpayload/include/arm/arch/cache.h
index ffdb55a706..5210dfe6a8 100644
--- a/payloads/libpayload/include/arm/arch/cache.h
+++ b/payloads/libpayload/include/arm/arch/cache.h
@@ -304,6 +304,9 @@ void dcache_clean_all(void);
/* dcache invalidate all (on current level given by CCSELR) */
void dcache_invalidate_all(void);
+/* returns number of bytes per cache line */
+unsigned int dcache_line_bytes(void);
+
/* dcache and MMU disable */
void dcache_mmu_disable(void);