powerpc/virtex5: Fix Virtex5 machine check handling

Submitted by Grant Likely on Dec. 4, 2008, 3:39 p.m.

Details

Message ID 20081204153955.16903.55398.stgit@localhost.localdomain
State Accepted, archived
Commit 640d17d60e83401e10e66a0ab6e9e2d6350df656
Delegated to: Josh Boyer
Headers show

Commit Message

Grant Likely Dec. 4, 2008, 3:39 p.m.
From: Grant Likely <grant.likely@secretlab.ca>

The 440x5 core in the Virtex5 uses the 440A type machine check
(ie, they have MCSRR0/MCSRR1). They thus need to call the
appropriate fixup function to hook the right variant of the
exception.

Without this, all machine checks become fatal due to loss
of context when entering the exception handler.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
---

 arch/powerpc/kernel/cpu_setup_44x.S |    1 +
 arch/powerpc/kernel/cputable.c      |    3 +++
 2 files changed, 4 insertions(+), 0 deletions(-)

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diff --git a/arch/powerpc/kernel/cpu_setup_44x.S b/arch/powerpc/kernel/cpu_setup_44x.S
index 31c18b5..10b4ab1 100644
--- a/arch/powerpc/kernel/cpu_setup_44x.S
+++ b/arch/powerpc/kernel/cpu_setup_44x.S
@@ -40,6 +40,7 @@  _GLOBAL(__setup_cpu_460gt)
 	mtlr	r4
 	blr
 
+_GLOBAL(__setup_cpu_440x5)
 _GLOBAL(__setup_cpu_440gx)
 _GLOBAL(__setup_cpu_440spe)
 	b	__fixup_440A_mcheck
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index b1eb834..7e87195 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -39,6 +39,7 @@  extern void __setup_cpu_440epx(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_440gx(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_440grx(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_440spe(unsigned long offset, struct cpu_spec* spec);
+extern void __setup_cpu_440x5(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_460ex(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_460gt(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_603(unsigned long offset, struct cpu_spec* spec);
@@ -1500,6 +1501,8 @@  static struct cpu_spec __initdata cpu_specs[] = {
 		.cpu_user_features	= COMMON_USER_BOOKE,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.cpu_setup		= __setup_cpu_440x5,
+		.machine_check		= machine_check_440A,
 		.platform		= "ppc440",
 	},
 	{ /* 460EX */