Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754054Ab3CKLEe (ORCPT ); Mon, 11 Mar 2013 07:04:34 -0400 Received: from mail.windriver.com ([147.11.1.11]:37709 "EHLO mail.windriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753932Ab3CKLCy (ORCPT ); Mon, 11 Mar 2013 07:02:54 -0400 From: Tiejun Chen To: , CC: , , Subject: [v4][PATCH 1/7] powerpc/book3e: load critical/machine/debug exception stack Date: Mon, 11 Mar 2013 19:02:40 +0800 Message-ID: <1362999766-20897-2-git-send-email-tiejun.chen@windriver.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1362999766-20897-1-git-send-email-tiejun.chen@windriver.com> References: <1362999766-20897-1-git-send-email-tiejun.chen@windriver.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2961 Lines: 95 We always alloc critical/machine/debug check exceptions. This is different from the normal exception. So we should load these exception stack properly like we did for booke. Signed-off-by: Tiejun Chen --- arch/powerpc/kernel/exceptions-64e.S | 49 +++++++++++++++++++++++++++++++--- 1 file changed, 46 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S index 1e7782b..7fd6af0 100644 --- a/arch/powerpc/kernel/exceptions-64e.S +++ b/arch/powerpc/kernel/exceptions-64e.S @@ -36,6 +36,37 @@ */ #define SPECIAL_EXC_FRAME_SIZE INT_FRAME_SIZE +/* only on book3e */ +#define DBG_STACK_BASE dbgirq_ctx +#define MC_STACK_BASE mcheckirq_ctx +#define CRIT_STACK_BASE critirq_ctx + +#ifdef CONFIG_RELOCATABLE +#define LOAD_STACK_BASE(reg, level) \ + tovirt(r2,r2); \ + LOAD_REG_ADDR(reg, level##_STACK_BASE); +#else +#define LOAD_STACK_BASE(reg, level) \ + LOAD_REG_IMMEDIATE(reg, level##_STACK_BASE); +#endif + +#ifdef CONFIG_SMP +#define BOOK3E_LOAD_EXC_LEVEL_STACK(level) \ + mfspr r14,SPRN_PIR; \ + slwi r14,r14,3; \ + LOAD_STACK_BASE(r10, level); \ + add r10,r10,r14; \ + ld r10,0(r10); \ + addi r10,r10,THREAD_SIZE; \ + std r10,PACA_##level##_STACK(r13); +#else +#define BOOK3E_LOAD_EXC_LEVEL_STACK(level) \ + LOAD_STACK_BASE(r10, level); \ + ld r10,0(r10); \ + addi r10,r10,THREAD_SIZE; \ + std r10,PACA_##level##_STACK(r13); +#endif + /* Exception prolog code for all exceptions */ #define EXCEPTION_PROLOG(n, intnum, type, addition) \ mtspr SPRN_SPRG_##type##_SCRATCH,r13; /* get spare registers */ \ @@ -68,20 +99,32 @@ #define SPRN_GDBELL_SRR1 SPRN_GSRR1 #define CRIT_SET_KSTACK \ + andi. r10,r11,MSR_PR; \ + bne 1f; \ + BOOK3E_LOAD_EXC_LEVEL_STACK(CRIT); \ ld r1,PACA_CRIT_STACK(r13); \ - subi r1,r1,SPECIAL_EXC_FRAME_SIZE; + subi r1,r1,SPECIAL_EXC_FRAME_SIZE; \ +1: #define SPRN_CRIT_SRR0 SPRN_CSRR0 #define SPRN_CRIT_SRR1 SPRN_CSRR1 #define DBG_SET_KSTACK \ + andi. r10,r11,MSR_PR; \ + bne 1f; \ + BOOK3E_LOAD_EXC_LEVEL_STACK(DBG); \ ld r1,PACA_DBG_STACK(r13); \ - subi r1,r1,SPECIAL_EXC_FRAME_SIZE; + subi r1,r1,SPECIAL_EXC_FRAME_SIZE; \ +1: #define SPRN_DBG_SRR0 SPRN_DSRR0 #define SPRN_DBG_SRR1 SPRN_DSRR1 #define MC_SET_KSTACK \ + andi. r10,r11,MSR_PR; \ + bne 1f; \ + BOOK3E_LOAD_EXC_LEVEL_STACK(MC); \ ld r1,PACA_MC_STACK(r13); \ - subi r1,r1,SPECIAL_EXC_FRAME_SIZE; + subi r1,r1,SPECIAL_EXC_FRAME_SIZE; \ +1: #define SPRN_MC_SRR0 SPRN_MCSRR0 #define SPRN_MC_SRR1 SPRN_MCSRR1 -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/