From f1f2c3ca9f837985cc1f4bc3821ac1763430cdcf Mon Sep 17 00:00:00 2001 From: Aneesh V Date: Thu, 16 Feb 2012 03:40:15 +0000 Subject: [PATCH] armv7: omap3: leave outer cache enabled Mainline kernel for OMAP3 doesn't enable L2 cache It expects L2$ to be enabled by ROM-code/bootloader. Leaving L2$ enabled can be troublesome in cases where the L2 cache is not under CP15 control, such as in Cortex-A9. This problem is explained in detail in the commit dc7100f4080952798413fb63bb4134b22c57623a However, this problem doesn't apply to Cortex-A8 because L2$ in Cortex-A8 is under CP15 control and hence the generic armv7 maintenance opertions work for it. As such we can make an exception for OMAP3 and leave the L2$ enabled when we jump to kernel. This is done by removing the strongly-linked implementation of v7_outer_cache_disable() and allowing it to fall back to the weakly linked implementation that doesn't do anything. Signed-off-by: Aneesh V --- arch/arm/cpu/armv7/omap3/board.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/cpu/armv7/omap3/board.c b/arch/arm/cpu/armv7/omap3/board.c index 637ab7b6bf..aabc651413 100644 --- a/arch/arm/cpu/armv7/omap3/board.c +++ b/arch/arm/cpu/armv7/omap3/board.c @@ -430,7 +430,7 @@ void v7_outer_cache_enable(void) omap3_update_aux_cr(0x2, 0); } -void v7_outer_cache_disable(void) +void omap3_outer_cache_disable(void) { /* Clear L2EN */ omap3_update_aux_cr_secure(0, 0x2); -- 2.25.1