From: Tiejun Chen <tiejun.chen@windriver.com>
To: <benh@kernel.crashing.org>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
jason.wessel@windriver.com
Subject: [PATCH 1/3] powerpc/book3e: load critical/machine/debug exception stack
Date: Thu, 25 Oct 2012 14:43:28 +0800 [thread overview]
Message-ID: <1351147410-17452-1-git-send-email-tiejun.chen@windriver.com> (raw)
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 <tiejun.chen@windriver.com>
---
arch/powerpc/kernel/exceptions-64e.S | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index 4684e33..43b654a 100644
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -36,6 +36,30 @@
*/
#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_SMP
+#define BOOK3E_LOAD_EXC_LEVEL_STACK(level) \
+ std r14,PACA_EX##level+EX_R14(r13); \
+ mfspr r14,SPRN_PIR; \
+ slwi r14,r14,3; \
+ LOAD_REG_ADDR(r10, level##_STACK_BASE); \
+ add r10,r10,r14; \
+ ld r10,0(r10); \
+ addi r10,r10,THREAD_SIZE; \
+ std r10,PACA_DBG_STACK(r13); \
+ ld r14,PACA_EX##level+EX_R14(r13);
+#else
+#define BOOK3E_LOAD_EXC_LEVEL_STACK(level) \
+ LOAD_REG_ADDR(r10, level##_STACK_BASE); \
+ ld r10,0(r10); \
+ addi r10,r10,THREAD_SIZE; \
+ std r10,PACA_DBG_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 */ \
@@ -68,18 +92,21 @@
#define SPRN_GDBELL_SRR1 SPRN_GSRR1
#define CRIT_SET_KSTACK \
+ BOOK3E_LOAD_EXC_LEVEL_STACK(CRIT); \
ld r1,PACA_CRIT_STACK(r13); \
subi r1,r1,SPECIAL_EXC_FRAME_SIZE;
#define SPRN_CRIT_SRR0 SPRN_CSRR0
#define SPRN_CRIT_SRR1 SPRN_CSRR1
#define DBG_SET_KSTACK \
+ BOOK3E_LOAD_EXC_LEVEL_STACK(DBG); \
ld r1,PACA_DBG_STACK(r13); \
subi r1,r1,SPECIAL_EXC_FRAME_SIZE;
#define SPRN_DBG_SRR0 SPRN_DSRR0
#define SPRN_DBG_SRR1 SPRN_DSRR1
#define MC_SET_KSTACK \
+ BOOK3E_LOAD_EXC_LEVEL_STACK(MC); \
ld r1,PACA_MC_STACK(r13); \
subi r1,r1,SPECIAL_EXC_FRAME_SIZE;
#define SPRN_MC_SRR0 SPRN_MCSRR0
--
1.7.9.5
next reply other threads:[~2012-10-25 6:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-25 6:43 Tiejun Chen [this message]
2012-10-25 6:43 ` [PATCH 2/3] powerpc/book3e: support kgdb for kernel space Tiejun Chen
2012-10-25 6:43 ` [PATCH 3/3] kgdb/kgdbts: support ppc64 Tiejun Chen
2012-12-18 22:10 ` [PATCH 1/3] powerpc/book3e: load critical/machine/debug exception stack Tabi Timur-B04825
2012-12-20 9:14 ` tiejun.chen
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