powerpc/8xx: macro for handling CPU15 errata

Having a macro will help keep clear code.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <scottwood@freescale.com>

diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 9b53fe1..1279018 100644 (file)
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -297,6 +297,17 @@ SystemCall:
  * We have to use the MD_xxx registers for the tablewalk because the
  * equivalent MI_xxx registers only perform the attribute functions.
  */
+
+#ifdef CONFIG_8xx_CPU15
+#define INVALIDATE_ADJACENT_PAGES_CPU15(tmp, addr)     \
+       addi    tmp, addr, PAGE_SIZE;   \
+       tlbie   tmp;                    \
+       addi    tmp, addr, -PAGE_SIZE;  \
+       tlbie   tmp
+#else
+#define INVALIDATE_ADJACENT_PAGES_CPU15(tmp, addr)
+#endif
+
 InstructionTLBMiss:
 #ifdef CONFIG_8xx_CPU6
        mtspr   SPRN_DAR, r3
@@ -304,12 +315,7 @@ InstructionTLBMiss:
        EXCEPTION_PROLOG_0
        mtspr   SPRN_SPRG_SCRATCH2, r10
        mfspr   r10, SPRN_SRR0  /* Get effective address of fault */
-#ifdef CONFIG_8xx_CPU15
-       addi    r11, r10, PAGE_SIZE
-       tlbie   r11
-       addi    r11, r10, -PAGE_SIZE
-       tlbie   r11
-#endif
+       INVALIDATE_ADJACENT_PAGES_CPU15(r11, r10)
 
        /* If we are faulting a kernel address, we have to use the
         * kernel page tables.