From ba3c02636a0743a62cb50b920d36e1c046ab88cf Mon Sep 17 00:00:00 2001 From: Tony Thompson Date: Sat, 30 May 2009 14:00:15 +0100 Subject: [PATCH] ARMv7: Mark the PTWs inner WBWA on SMP and WB on UP There are additional bits to set for the ARMv7 SMP extensions in the TTBR registers. The IRGN bits order is counter-intuitive but it allows software built for the ARMv7 base architecture to run on an implementation with the MP extensions. Signed-off-by: Tony Thompson Signed-off-by: Catalin Marinas --- arch/arm/mm/proc-v7.S | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S index c3f737516836..a18aace32990 100644 --- a/arch/arm/mm/proc-v7.S +++ b/arch/arm/mm/proc-v7.S @@ -19,17 +19,23 @@ #include "proc-macros.S" -#define TTB_C (1 << 0) #define TTB_S (1 << 1) #define TTB_RGN_NC (0 << 3) #define TTB_RGN_OC_WBWA (1 << 3) #define TTB_RGN_OC_WT (2 << 3) #define TTB_RGN_OC_WB (3 << 3) +#define TTB_NOS (1 << 5) +#define TTB_IRGN_NC ((0 << 0) | (0 << 6)) +#define TTB_IRGN_WBWA ((0 << 0) | (1 << 6)) +#define TTB_IRGN_WT ((1 << 0) | (0 << 6)) +#define TTB_IRGN_WB ((1 << 0) | (1 << 6)) #ifndef CONFIG_SMP -#define TTB_FLAGS TTB_C|TTB_RGN_OC_WB @ mark PTWs cacheable, outer WB +/* PTWs cacheable, inner WB not shareable, outer WB not shareable */ +#define TTB_FLAGS TTB_IRGN_WB|TTB_RGN_OC_WB #else -#define TTB_FLAGS TTB_C|TTB_S|TTB_RGN_OC_WBWA @ mark PTWs cacheable and shared, outer WBWA +/* PTWs cacheable, inner WBWA shareable, outer WBWA not shareable */ +#define TTB_FLAGS TTB_IRGN_WBWA|TTB_S|TTB_NOS|TTB_RGN_OC_WBWA #endif ENTRY(cpu_v7_proc_init)