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Diffstat (limited to 'arch/powerpc/kernel/head_booke.h')
-rw-r--r--arch/powerpc/kernel/head_booke.h33
1 files changed, 20 insertions, 13 deletions
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index ba9393f8e77a..aefafc6330c9 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -56,8 +56,17 @@
* is necessary since the MMU is always on, for Book-E parts, and the stacks
* are offset from KERNELBASE.
*
+ * There is some space optimization to be had here if desired. However
+ * to allow for a common kernel with support for debug exceptions either
+ * going to critical or their own debug level we aren't currently
+ * providing configurations that micro-optimize space usage.
*/
-#define BOOKE_EXCEPTION_STACK_SIZE (8192)
+#ifdef CONFIG_44x
+#define NUM_EXCEPTION_LVLS 2
+#else
+#define NUM_EXCEPTION_LVLS 3
+#endif
+#define BOOKE_EXCEPTION_STACK_SIZE (4096 * NUM_EXCEPTION_LVLS)
/* CRIT_SPRG only used in critical exception handling */
#define CRIT_SPRG SPRN_SPRG2
@@ -68,7 +77,7 @@
#define CRIT_STACK_TOP (exception_stack_top)
/* only on e200 for now */
-#define DEBUG_STACK_TOP (exception_stack_top - 4096)
+#define DEBUG_STACK_TOP (exception_stack_top - 8192)
#define DEBUG_SPRG SPRN_SPRG6W
#ifdef CONFIG_SMP
@@ -212,9 +221,8 @@ label:
* save (and later restore) the MSR via SPRN_CSRR1, which will still have
* the MSR_DE bit set.
*/
-#ifdef CONFIG_E200
-#define DEBUG_EXCEPTION \
- START_EXCEPTION(Debug); \
+#define DEBUG_DEBUG_EXCEPTION \
+ START_EXCEPTION(DebugDebug); \
DEBUG_EXCEPTION_PROLOG; \
\
/* \
@@ -234,8 +242,8 @@ label:
cmplw r12,r10; \
blt+ 2f; /* addr below exception vectors */ \
\
- lis r10,Debug@h; \
- ori r10,r10,Debug@l; \
+ lis r10,DebugDebug@h; \
+ ori r10,r10,DebugDebug@l; \
cmplw r12,r10; \
bgt+ 2f; /* addr above exception vectors */ \
\
@@ -265,9 +273,9 @@ label:
2: mfspr r4,SPRN_DBSR; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_TEMPLATE(DebugException, 0x2002, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), NOCOPY, debug_transfer_to_handler, ret_from_debug_exc)
-#else
-#define DEBUG_EXCEPTION \
- START_EXCEPTION(Debug); \
+
+#define DEBUG_CRIT_EXCEPTION \
+ START_EXCEPTION(DebugCrit); \
CRITICAL_EXCEPTION_PROLOG; \
\
/* \
@@ -287,8 +295,8 @@ label:
cmplw r12,r10; \
blt+ 2f; /* addr below exception vectors */ \
\
- lis r10,Debug@h; \
- ori r10,r10,Debug@l; \
+ lis r10,DebugCrit@h; \
+ ori r10,r10,DebugCrit@l; \
cmplw r12,r10; \
bgt+ 2f; /* addr above exception vectors */ \
\
@@ -318,7 +326,6 @@ label:
2: mfspr r4,SPRN_DBSR; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_TEMPLATE(DebugException, 0x2002, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), NOCOPY, crit_transfer_to_handler, ret_from_crit_exc)
-#endif
#define INSTRUCTION_STORAGE_EXCEPTION \
START_EXCEPTION(InstructionStorage) \