powerpc: Enable additional BAT registers in setup_745x_specifics()

Currently the kernel expects the additional four IBAT and DBAT registers
to be available, but doesn't enable these registers on 745x CPUs, which
have them disabled after reset. Thus set the HIGH_BAT_EN bit in HID0
register, if the corresponding MMU feature is defined.

Signed-off-by: Gerhard Pircher <gerhard_pircher@gmx.net>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

diff --git a/arch/powerpc/kernel/cpu_setup_6xx.S b/arch/powerpc/kernel/cpu_setup_6xx.S
index 54f767e..1e9949e 100644 (file)
--- a/arch/powerpc/kernel/cpu_setup_6xx.S
+++ b/arch/powerpc/kernel/cpu_setup_6xx.S
@@ -239,6 +239,9 @@ END_FTR_SECTION_IFSET(CPU_FTR_L3CR)
        ori     r11,r11,HID0_SGE | HID0_FOLD | HID0_BHTE
        ori     r11,r11,HID0_LRSTK | HID0_BTIC
        oris    r11,r11,HID0_DPM@h
+BEGIN_MMU_FTR_SECTION
+       oris    r11,r11,HID0_HIGH_BAT@h
+END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS)
 BEGIN_FTR_SECTION
        xori    r11,r11,HID0_BTIC
 END_FTR_SECTION_IFSET(CPU_FTR_NO_BTIC)