[U-Boot] [RFC][PATCH 16/19] arm926: flush cache for arm926
Heiko Schocher
hs at denx.de
Thu Jul 29 12:45:10 CEST 2010
This simple adds the cache flush for arm926. Most likely
the same works for other families, like arm920t, but I didn't
check as this is currently just an RFC.
Signed-off-by: Alessandro Rubini <rubini at gnudd.com>
---
arch/arm/lib/cache.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/arm/lib/cache.c b/arch/arm/lib/cache.c
index 61ee9d3..b36fd24 100644
--- a/arch/arm/lib/cache.c
+++ b/arch/arm/lib/cache.c
@@ -32,5 +32,11 @@ void flush_cache (unsigned long dummy1, unsigned long dummy2)
arm1136_cache_flush();
#endif
+#ifdef CONFIG_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
return;
}
--
1.6.2.5
--
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