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authorJosh Boyer <jwboyer@linux.vnet.ibm.com>2007-11-17 04:29:56 +1100
committerJosh Boyer <jwboyer@linux.vnet.ibm.com>2007-11-19 08:22:20 -0600
commit3d1d662ef423adf6947a37e230f4d7e8ed7c9544 (patch)
treea94fc24a021377e4b654101caa6104470405966d
parentb8b799a497e4a4bfd5fca8abc526e908b26c71e8 (diff)
[POWERPC] 4xx: Use virtual PVR value to init FPU on arch/ppc 440EP
This fixes arch/ppc 440EP platforms to setup the FPU correctly. A virtual PVR is used, as 440GR platforms share an identical hardware PVR value and do not have an FPU. Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
-rw-r--r--arch/ppc/kernel/setup.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/ppc/kernel/setup.c b/arch/ppc/kernel/setup.c
index aac88c2f3db..5255bd80aa6 100644
--- a/arch/ppc/kernel/setup.c
+++ b/arch/ppc/kernel/setup.c
@@ -312,7 +312,14 @@ early_init(int r3, int r4, int r5)
* Identify the CPU type and fix up code sections
* that depend on which cpu we have.
*/
+#if defined(CONFIG_440EP) && defined(CONFIG_PPC_FPU)
+ /* We pass the virtual PVR here for 440EP as 440EP and 440GR have
+ * identical PVRs and there is no reliable way to check for the FPU
+ */
+ spec = identify_cpu(offset, (mfspr(SPRN_PVR) | 0x8));
+#else
spec = identify_cpu(offset, mfspr(SPRN_PVR));
+#endif
do_feature_fixups(spec->cpu_features,
PTRRELOC(&__start___ftr_fixup),
PTRRELOC(&__stop___ftr_fixup));