[PATCH] ppc32: refactor FPU exception handling

Moved common FPU exception handling code out of head.S so it can be used by
several of the sub-architectures that might of a full PowerPC FPU.

Also, uses new CONFIG_PPC_FPU define to fix alignment exception handling
for floating point load/store instructions to only occur if we have a
hardware FPU.

Signed-off-by: Jason McMullan <jason.mcmullan@timesys.com>
Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/ppc/kernel/head_44x.S b/arch/ppc/kernel/head_44x.S
index 9ed8165a3d6c..9b6a8e513657 100644
--- a/arch/ppc/kernel/head_44x.S
+++ b/arch/ppc/kernel/head_44x.S
@@ -426,7 +426,11 @@ interrupt_base:
         PROGRAM_EXCEPTION
 
         /* Floating Point Unavailable Interrupt */
+#ifdef CONFIG_PPC_FPU
+        FP_UNAVAILABLE_EXCEPTION
+#else
         EXCEPTION(0x2010, FloatingPointUnavailable, UnknownException, EXC_XFER_EE)
+#endif
 
         /* System Call Interrupt */
         START_EXCEPTION(SystemCall)
@@ -686,8 +690,10 @@ _GLOBAL(giveup_altivec)
  *
  * The 44x core does not have an FPU.
  */
+#ifndef CONFIG_PPC_FPU
 _GLOBAL(giveup_fpu)
         blr
+#endif
 
 /*
  * extern void abort(void)