ppc64: SPARSEMEM_VMEMMAP support

[linux-2.6-omap-h63xx.git] / include / asm-powerpc / pgtable-ppc64.h

diff --git a/include/asm-powerpc/pgtable-ppc64.h b/include/asm-powerpc/pgtable-ppc64.h
index 300f9a199bf29d95e147569e354e740bd6f43d58..dd4c26dc57d2727d533c19fef3f9ad4224ccf737 100644 (file)
--- a/include/asm-powerpc/pgtable-ppc64.h
+++ b/include/asm-powerpc/pgtable-ppc64.h
@@ -67,6 +67,14 @@
 #define KERNEL_REGION_ID       (REGION_ID(PAGE_OFFSET))
 #define USER_REGION_ID         (0UL)
 
+/*
+ * Defines the address of the vmemap area, in the top 16th of the
+ * kernel region.
+ */
+#define VMEMMAP_BASE (ASM_CONST(CONFIG_KERNEL_START) + \
+                                       (0xfUL << (REGION_SHIFT - 4)))
+#define vmemmap ((struct page *)VMEMMAP_BASE)
+
 /*
  * Common bits in a linux-style PTE.  These match the bits in the
  * (hardware-defined) PowerPC PTE as closely as possible. Additional