powerpc/8xx: Fixing issue with CONFIG_PIN_TLB

Activating CONFIG_PIN_TLB is supposed to pin the IMMR and the first
three 8Mbytes pages.  But the setting of MD_CTR to a pinnable entry was
missing before the pinning of the third 8Mb page.  As the index is
decremented module 28 (MD_RSV4D is set) after every DTLB update, the
third 8Mbytes page was not pinned.

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 1b92a97..7ee876d 100644 (file)
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -858,6 +858,9 @@ initial_mmu:
        addis   r11, r11, 0x0080        /* Add 8M */
        mtspr   SPRN_MD_RPN, r11
 
+       addi    r10, r10, 0x0100
+       mtspr   SPRN_MD_CTR, r10
+
        addis   r8, r8, 0x0080          /* Add 8M */
        mtspr   SPRN_MD_EPN, r8
        mtspr   SPRN_MD_TWC, r9