ARM: cache: implement a default weak flush_cache() function

[karo-tx-uboot.git] / arch / arm / lib / cache.c

diff --git a/arch/arm/lib/cache.c b/arch/arm/lib/cache.c
index 9cedeac6d641eb7b8548fb8571bcd6a261388fdb..cd13db3440ddf783e0cb8089e4cd5724a90e7831 100644 (file)
--- a/arch/arm/lib/cache.c
+++ b/arch/arm/lib/cache.c
@@ -10,27 +10,13 @@
 #include <common.h>
 #include <malloc.h>
 
+/*
+ * Flush range from all levels of d-cache/unified-cache.
+ * Affects the range [start, start + size - 1].
+ */
 __weak void flush_cache(unsigned long start, unsigned long size)
 {
-#if defined(CONFIG_CPU_ARM1136)
-
-#if !defined(CONFIG_SYS_ICACHE_OFF)
-       asm("mcr p15, 0, r1, c7, c5, 0"); /* invalidate I cache */
-#endif
-
-#if !defined(CONFIG_SYS_DCACHE_OFF)
-       asm("mcr p15, 0, r1, c7, c14, 0"); /* Clean+invalidate D cache */
-#endif
-
-#endif /* CONFIG_CPU_ARM1136 */
-
-#ifdef CONFIG_CPU_ARM926EJS
-       /* test and clean, page 2-23 of arm926ejs manual */
-       asm("0: mrc p15, 0, r15, c7, c10, 3\n\t" "bne 0b\n" : : : "memory");
-       /* disable write buffer as well (page 2-22) */
-       asm("mcr p15, 0, %0, c7, c10, 4" : : "r" (0));
-#endif /* CONFIG_CPU_ARM926EJS */
-       return;
+       flush_dcache_range(start, start + size);
 }
 
 /*
@@ -51,6 +37,15 @@ __weak void enable_caches(void)
        puts("WARNING: Caches not enabled\n");
 }
 
+__weak void invalidate_dcache_range(unsigned long start, unsigned long stop)
+{
+       /* An empty stub, real implementation should be in platform code */
+}
+__weak void flush_dcache_range(unsigned long start, unsigned long stop)
+{
+       /* An empty stub, real implementation should be in platform code */
+}
+
 #ifdef CONFIG_SYS_NONCACHED_MEMORY
 /*
  * Reserve one MMU section worth of address space below the malloc() area that