[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>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/ppc/kernel/setup.c b/arch/ppc/kernel/setup.c
index aac88c2f3db9..5255bd80aa6b 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));