[POWERPC] Implement SLB shadow buffer

[powerpc.git] / include / asm-powerpc / lppaca.h

diff --git a/include/asm-powerpc/lppaca.h b/include/asm-powerpc/lppaca.h
index 4dc514a..942bb45 100644 (file)
--- a/include/asm-powerpc/lppaca.h
+++ b/include/asm-powerpc/lppaca.h
@@ -27,7 +27,9 @@
 //
 //
 //----------------------------------------------------------------------------
+#include <linux/cache.h>
 #include <asm/types.h>
+#include <asm/mmu.h>
 
 /* The Hypervisor barfs if the lppaca crosses a page boundary.  A 1k
  * alignment is sufficient to prevent this */
@@ -133,5 +135,22 @@ struct lppaca {
 
 extern struct lppaca lppaca[];
 
+/*
+ * SLB shadow buffer structure as defined in the PAPR.  The save_area
+ * contains adjacent ESID and VSID pairs for each shadowed SLB.  The
+ * ESID is stored in the lower 64bits, then the VSID.
+ */
+struct slb_shadow {
+       u32     persistent;             // Number of persistent SLBs    x00-x03
+       u32     buffer_length;          // Total shadow buffer length   x04-x07
+       u64     reserved;               // Alignment                    x08-x0f
+       struct  {
+               u64     esid;
+               u64     vsid;
+       } save_area[SLB_NUM_BOLTED];    //                              x10-x40
+} ____cacheline_aligned;
+
+extern struct slb_shadow slb_shadow[];
+
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_LPPACA_H */