[PATCH] ppc64: support 64k pages

Adds a new CONFIG_PPC_64K_PAGES which, when enabled, changes the kernel
base page size to 64K.  The resulting kernel still boots on any
hardware.  On current machines with 4K pages support only, the kernel
will maintain 16 "subpages" for each 64K page transparently.

Note that while real 64K capable HW has been tested, the current patch
will not enable it yet as such hardware is not released yet, and I'm
still verifying with the firmware architects the proper to get the
information from the newer hypervisors.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 4 deletions

diff --git a/include/asm-powerpc/machdep.h b/include/asm-powerpc/machdep.h
index 629ca964b974..fa03864d06eb 100644
--- a/include/asm-powerpc/machdep.h
+++ b/include/asm-powerpc/machdep.h
@@ -47,20 +47,22 @@ struct machdep_calls {
 #ifdef CONFIG_PPC64
         void            (*hpte_invalidate)(unsigned long slot,
                                            unsigned long va,
-                                           int large,
+                                           int psize,
                                            int local);
         long            (*hpte_updatepp)(unsigned long slot, 
                                          unsigned long newpp, 
                                          unsigned long va,
-                                         int large,
+                                         int pize,
                                          int local);
         void            (*hpte_updateboltedpp)(unsigned long newpp, 
-                                               unsigned long ea);
+                                               unsigned long ea,
+                                               int psize);
         long            (*hpte_insert)(unsigned long hpte_group,
                                        unsigned long va,
                                        unsigned long prpn,
+                                       unsigned long rflags,
                                        unsigned long vflags,
-                                       unsigned long rflags);
+                                       int psize);
         long            (*hpte_remove)(unsigned long hpte_group);
         void            (*flush_hash_range)(unsigned long number, int local);