From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Michael Neuling To: Benjamin Herrenschmidt Subject: [PATCH 09/14] powerpc: Setup relocation on exceptions for bare metal systems Date: Fri, 9 Nov 2012 17:19:07 +1100 Message-Id: <1352441953-29096-10-git-send-email-mikey@neuling.org> In-Reply-To: <1352441953-29096-1-git-send-email-mikey@neuling.org> References: <1352441953-29096-1-git-send-email-mikey@neuling.org> Cc: Michael Neuling , linuxppc-dev@lists.ozlabs.org, Ian Munsie , Matt Evans List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This turns on MMU on execptions via AIL field in the LPCR. Signed-off-by: Matt Evans Signed-off-by: Michael Neuling --- arch/powerpc/include/asm/reg.h | 2 ++ arch/powerpc/kernel/cpu_setup_power.S | 2 ++ 2 files changed, 4 insertions(+) diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 7b44a6e..886ab8e 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -249,6 +249,8 @@ #define LPCR_RMLS 0x1C000000 /* impl dependent rmo limit sel */ #define LPCR_RMLS_SH (63-37) #define LPCR_ILE 0x02000000 /* !HV irqs set MSR:LE */ +#define LPCR_AIL_0 0x00000000 /* MMU off IRQ location 0x0 */ +#define LPCR_AIL_3 0x01800000 /* MMU on IRQ location 0xc00...4xxx */ #define LPCR_PECE 0x00007000 /* powersave exit cause enable */ #define LPCR_PECE0 0x00004000 /* ext. exceptions can cause exit */ #define LPCR_PECE1 0x00002000 /* decrementer can cause exit */ diff --git a/arch/powerpc/kernel/cpu_setup_power.S b/arch/powerpc/kernel/cpu_setup_power.S index 52dd033..57cf140 100644 --- a/arch/powerpc/kernel/cpu_setup_power.S +++ b/arch/powerpc/kernel/cpu_setup_power.S @@ -54,6 +54,7 @@ _GLOBAL(__setup_cpu_power8) li r0,0 mtspr SPRN_LPID,r0 mfspr r3,SPRN_LPCR + oris r3, r3, LPCR_AIL_3@h bl __init_LPCR bl __init_TLB mtlr r11 @@ -67,6 +68,7 @@ _GLOBAL(__restore_cpu_power8) li r0,0 mtspr SPRN_LPID,r0 mfspr r3,SPRN_LPCR + oris r3, r3, LPCR_AIL_3@h bl __init_LPCR bl __init_TLB mtlr r11 -- 1.7.9.5