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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2007-12-21 15:39:21 +1100
committerJosh Boyer <jwboyer@linux.vnet.ibm.com>2007-12-23 13:11:59 -0600
commit47c0bd1ae24c34e851cf0f2b02ef2a6847d7ae15 (patch)
tree86fab68618a4afa03660cc576c9e7da3e5a0b520 /arch/powerpc/kernel/head_44x.S
parentc2a7dcad9f0d92d7a96e735abb8bec7b9c621536 (diff)
downloadlinux-47c0bd1ae24c34e851cf0f2b02ef2a6847d7ae15.tar.bz2
[POWERPC] Reworking machine check handling and Fix 440/440A
This adds a cputable function pointer for the CPU-side machine check handling. The semantic is still the same as the old one, the one in ppc_md. overrides the one in cputable, though ultimately we'll want to change that so the CPU gets first. This removes CONFIG_440A which was a problem for multiplatform kernels and instead fixes up the IVOR at runtime from a setup_cpu function. The "A" version of the machine check also tweaks the regs->trap value to differenciate the 2 versions at the C level. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Diffstat (limited to 'arch/powerpc/kernel/head_44x.S')
-rw-r--r--arch/powerpc/kernel/head_44x.S14
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S
index 56aba84c1f6e..ad071a146a8d 100644
--- a/arch/powerpc/kernel/head_44x.S
+++ b/arch/powerpc/kernel/head_44x.S
@@ -289,11 +289,8 @@ interrupt_base:
CRITICAL_EXCEPTION(0x0100, CriticalInput, unknown_exception)
/* Machine Check Interrupt */
-#ifdef CONFIG_440A
- MCHECK_EXCEPTION(0x0200, MachineCheck, machine_check_exception)
-#else
CRITICAL_EXCEPTION(0x0200, MachineCheck, machine_check_exception)
-#endif
+ MCHECK_EXCEPTION(0x0210, MachineCheckA, machine_check_exception)
/* Data Storage Interrupt */
START_EXCEPTION(DataStorage)
@@ -674,6 +671,15 @@ finish_tlb_load:
*/
/*
+ * Adjust the machine check IVOR on 440A cores
+ */
+_GLOBAL(__fixup_440A_mcheck)
+ li r3,MachineCheckA@l
+ mtspr SPRN_IVOR1,r3
+ sync
+ blr
+
+/*
* extern void giveup_altivec(struct task_struct *prev)
*
* The 44x core does not have an AltiVec unit.