[U-Boot] [PATCH v5 4/7] arm, arm926ejs: Do not clear the V bit on DA850 SoCs

Christian Riesch christian.riesch at omicron.at
Tue Jan 31 14:56:51 CET 2012


The V bit of the c1 register of CP15 should not be cleared
since the SoC has no valid memory at 0x00000000.

Signed-off-by: Christian Riesch <christian.riesch at omicron.at>
Reported-by: Sughosh Ganu <urwithsughosh at gmail.com>
Cc: Albert Aribaud <albert.u.boot at aribaud.net>
Cc: Tom Rini <trini at ti.com>
---
 arch/arm/cpu/arm926ejs/start.S |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/arch/arm/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S
index b39ed8a..b350480 100644
--- a/arch/arm/cpu/arm926ejs/start.S
+++ b/arch/arm/cpu/arm926ejs/start.S
@@ -372,7 +372,10 @@ flush_dcache:
 	 * disable MMU and D cache, and enable I cache
 	 */
 	mrc	p15, 0, r0, c1, c0, 0
-	bic	r0, r0, #0x00002300	/* clear bits 13, 9:8 (--V- --RS) */
+	bic	r0, r0, #0x00000300	/* clear bits 9:8 (---- --RS) */
+#ifndef CONFIG_SOC_DA850
+	bic	r0, r0, #0x00002000	/* clear bit 13 (--V- ----) */
+#endif
 	bic	r0, r0, #0x00000087	/* clear bits 7, 2:0 (B--- -CAM) */
 	orr	r0, r0, #0x00000002	/* set bit 2 (A) Align */
 	orr	r0, r0, #0x00001000	/* set bit 12 (I) I-Cache */
-- 
1.7.0.4



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