[PATCH] ppc64 kexec: native hash clear

Add code to clear the hash table and invalidate the tlb for native (SMP,
non-LPAR) mode.  Supports 16M and 4k pages.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: R Sharada <sharada@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/include/asm-ppc64/mmu.h b/include/asm-ppc64/mmu.h
index 9d03a98a4fa3..f373de5e3dd9 100644
--- a/include/asm-ppc64/mmu.h
+++ b/include/asm-ppc64/mmu.h
@@ -181,6 +181,28 @@ static inline void tlbiel(unsigned long va)
         asm volatile("ptesync": : :"memory");
 }
 
+static inline unsigned long slot2va(unsigned long avpn, unsigned long large,
+                unsigned long secondary, unsigned long slot)
+{
+        unsigned long va;
+
+        va = avpn << 23;
+
+        if (!large) {
+                unsigned long vpi, pteg;
+
+                pteg = slot / HPTES_PER_GROUP;
+                if (secondary)
+                        pteg = ~pteg;
+
+                vpi = ((va >> 28) ^ pteg) & htab_hash_mask;
+
+                va |= vpi << PAGE_SHIFT;
+        }
+
+        return va;
+}
+
 /*
  * Handle a fault by adding an HPTE. If the address can't be determined
  * to be valid via Linux page tables, return 1. If handled return 0