powerpc/mm: Split mmu_context handling

This splits the mmu_context handling between 32-bit hash based
processors, 64-bit hash based processors and everybody else.  This is
preliminary work for adding SMP support for BookE processors.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 10 insertions, 2 deletions

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 548efa55c8fe..db61dafb924d 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -195,13 +195,21 @@ config SPE
 
 config PPC_STD_MMU
         bool
-        depends on 6xx || POWER3 || POWER4 || PPC64
+        depends on 6xx || PPC64
         default y
 
 config PPC_STD_MMU_32
         def_bool y
         depends on PPC_STD_MMU && PPC32
 
+config PPC_STD_MMU_64
+        def_bool y
+        depends on PPC_STD_MMU && PPC64
+
+config PPC_MMU_NOHASH
+        def_bool y
+        depends on !PPC_STD_MMU
+
 config PPC_MM_SLICES
         bool
         default y if HUGETLB_PAGE || PPC_64K_PAGES
diff --git a/arch/powerpc/platforms/powermac/cpufreq_32.c b/arch/powerpc/platforms/powermac/cpufreq_32.c
index 792d3ce8112e..65c585b8b00d 100644
--- a/arch/powerpc/platforms/powermac/cpufreq_32.c
+++ b/arch/powerpc/platforms/powermac/cpufreq_32.c
@@ -310,7 +310,7 @@ static int pmu_set_cpu_speed(int low_speed)
                 _set_L3CR(save_l3cr);
 
         /* Restore userland MMU context */
-        set_context(current->active_mm->context.id, current->active_mm->pgd);
+        switch_mmu_context(NULL, current->active_mm);
 
 #ifdef DEBUG_FREQ
         printk(KERN_DEBUG "HID1, after: %x\n", mfspr(SPRN_HID1));