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authorKumar Gala <galak@kernel.crashing.org>2008-04-30 03:49:55 -0500
committerKumar Gala <galak@kernel.crashing.org>2008-06-02 14:54:42 -0500
commitbcf0b0880710409420a4e3b15dbf4b9a63542c0b (patch)
treeca1c813648ea075b772112237fde3ccfe3ddb776 /include/asm-powerpc/irq.h
parentc054065bc10a7ee2bcf78b5bc95f4b4d9bdc923a (diff)
[POWERPC] Move to runtime allocated exception stacks
For the additonal exception levels (critical, debug, machine check) on 40x/book-e we were using "static" allocations of the stack in the associated head.S. Move to a runtime allocation to make the code a bit easier to read as we mimic how we handle IRQ stacks. Its also a bit easier to setup the stack with a "dummy" thread_info in C code. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc/irq.h')
-rw-r--r--include/asm-powerpc/irq.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/asm-powerpc/irq.h b/include/asm-powerpc/irq.h
index 5089deb8fec..1ef8e304e0e 100644
--- a/include/asm-powerpc/irq.h
+++ b/include/asm-powerpc/irq.h
@@ -619,6 +619,19 @@ struct pt_regs;
#define __ARCH_HAS_DO_SOFTIRQ
+#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
+/*
+ * Per-cpu stacks for handling critical, debug and machine check
+ * level interrupts.
+ */
+extern struct thread_info *critirq_ctx[NR_CPUS];
+extern struct thread_info *dbgirq_ctx[NR_CPUS];
+extern struct thread_info *mcheckirq_ctx[NR_CPUS];
+extern void exc_lvl_ctx_init(void);
+#else
+#define exc_lvl_ctx_init()
+#endif
+
#ifdef CONFIG_IRQSTACKS
/*
* Per-cpu stacks for handling hard and soft interrupts.