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[U-Boot,1/3] ARM: add special dcache flush op code for 88SV331xV5

Message ID 1318082384-6483-2-git-send-email-leiwen@marvell.com
State Accepted
Delegated to: Prafulla Wadaskar
Headers show

Commit Message

Lei Wen Oct. 8, 2011, 1:59 p.m. UTC 
Marvell 88SV331xV5 has its specific arm cp15 opcode, which could
flush out whole dcache by only one line of asm code.

Signed-off-by: Lei Wen <leiwen@marvell.com>
---
 arch/arm/lib/cache.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
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Patch

diff --git a/arch/arm/lib/cache.c b/arch/arm/lib/cache.c
index b545fb7..bfcbda4 100644
--- a/arch/arm/lib/cache.c
+++ b/arch/arm/lib/cache.c
@@ -33,11 +33,16 @@  void  __flush_cache(unsigned long start, unsigned long size)
 	arm1136_cache_flush();
 #endif
 #ifdef CONFIG_ARM926EJS
+#ifdef CONFIG_SHEEVA_88SV331xV5
+	/* clean & invalidate all D cache */
+	asm("mcr p15, 0, %0, c7, c14, 0" : : "r" (0));
+#else
 	/* 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
+#endif
 	return;
 }
 void  flush_cache(unsigned long start, unsigned long size)