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authorKumar Gala <galak@kernel.crashing.org>2008-04-28 02:21:22 -0400
committerPaul Mackerras <paulus@samba.org>2008-04-29 01:57:34 -0400
commit85218827cc4ca900867807f19345418164ffc108 (patch)
tree1813b7fadb7c077acd0ef62f57385b7424ca0121 /arch/powerpc/kernel/asm-offsets.c
parentdd18434ff0b7d9b9ad3d596985fc84b329d2f9a8 (diff)
[POWERPC] Add IRQSTACKS support on ppc32
This makes it possible to use separate stacks for hard and soft IRQs on 32-bit powerpc as well as on 64-bit. The code for 32-bit is just the 32-bit analog of the 64-bit code. * Added allocation and initialization of the irq stacks. We limit the stacks to be in lowmem for ppc32. * Implemented ppc32 versions of call_do_softirq() and call_handle_irq() to switch the stack pointers * Reworked how we do stack overflow detection. We now keep around the limit of the stack in the thread_struct and compare against the limit to see if we've overflowed. We can now use this on ppc64 if desired. [ paulus@samba.org: Fixed bug on 6xx where we need to reload r9 with the thread_info pointer. ] Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/asm-offsets.c')
-rw-r--r--arch/powerpc/kernel/asm-offsets.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 62134845af08..af1d2c894ee1 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -67,6 +67,7 @@ int main(void)
67#endif /* CONFIG_PPC64 */ 67#endif /* CONFIG_PPC64 */
68 68
69 DEFINE(KSP, offsetof(struct thread_struct, ksp)); 69 DEFINE(KSP, offsetof(struct thread_struct, ksp));
70 DEFINE(KSP_LIMIT, offsetof(struct thread_struct, ksp_limit));
70 DEFINE(PT_REGS, offsetof(struct thread_struct, regs)); 71 DEFINE(PT_REGS, offsetof(struct thread_struct, regs));
71 DEFINE(THREAD_FPEXC_MODE, offsetof(struct thread_struct, fpexc_mode)); 72 DEFINE(THREAD_FPEXC_MODE, offsetof(struct thread_struct, fpexc_mode));
72 DEFINE(THREAD_FPR0, offsetof(struct thread_struct, fpr[0])); 73 DEFINE(THREAD_FPR0, offsetof(struct thread_struct, fpr[0]));