powerpc/64: Move MMU backend selection out of platform code

We move it into early_mmu_init() based on firmware features. For PS3,
we have to move the setting of these into early_init_devtree().

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 14 insertions, 0 deletions

diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 859ecaa928e9..336fad6524df 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -58,6 +58,7 @@
 #include <asm/firmware.h>
 #include <asm/tm.h>
 #include <asm/trace.h>
+#include <asm/ps3.h>
 
 #ifdef DEBUG
 #define DBG(fmt...) udbg_printf(fmt)
@@ -872,6 +873,11 @@ static void __init htab_initialize(void)
 #undef KB
 #undef MB
 
+void __init __weak hpte_init_lpar(void)
+{
+        panic("FW_FEATURE_LPAR set but no LPAR support compiled\n");
+}
+
 void __init hash__early_init_mmu(void)
 {
         /*
@@ -908,6 +914,14 @@ void __init hash__early_init_mmu(void)
         pci_io_base = ISA_IO_BASE;
 #endif
 
+        /* Select appropriate backend */
+        if (firmware_has_feature(FW_FEATURE_PS3_LV1))
+                ps3_early_mm_init();
+        else if (firmware_has_feature(FW_FEATURE_LPAR))
+                hpte_init_lpar();
+        else
+                hpte_init_native();
+
         /* Initialize the MMU Hash table and create the linear mapping
          * of memory. Has to be done before SLB initialization as this is
          * currently where the page size encoding is obtained.