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authorAl Viro <viro@zeniv.linux.org.uk>2008-08-18 05:05:42 +0400
committerH. Peter Anvin <hpa@zytor.com>2008-10-23 09:55:20 +0400
commitbb8985586b7a906e116db835c64773b7a7d51663 (patch)
treede93ae58e88cc563d95cc124a73f3930594c6100 /arch/x86/include/asm/mmzone_64.h
parent8ede0bdb63305d3353efd97e9af6210afb05734e (diff)
downloadlinux-bb8985586b7a906e116db835c64773b7a7d51663.tar.xz
x86, um: ... and asm-x86 move
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/include/asm/mmzone_64.h')
-rw-r--r--arch/x86/include/asm/mmzone_64.h51
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mmzone_64.h b/arch/x86/include/asm/mmzone_64.h
new file mode 100644
index 000000000000..6480f3333b2a
--- /dev/null
+++ b/arch/x86/include/asm/mmzone_64.h
@@ -0,0 +1,51 @@
+/* K8 NUMA support */
+/* Copyright 2002,2003 by Andi Kleen, SuSE Labs */
+/* 2.5 Version loosely based on the NUMAQ Code by Pat Gaughen. */
+#ifndef ASM_X86__MMZONE_64_H
+#define ASM_X86__MMZONE_64_H
+
+
+#ifdef CONFIG_NUMA
+
+#include <linux/mmdebug.h>
+
+#include <asm/smp.h>
+
+/* Simple perfect hash to map physical addresses to node numbers */
+struct memnode {
+ int shift;
+ unsigned int mapsize;
+ s16 *map;
+ s16 embedded_map[64 - 8];
+} ____cacheline_aligned; /* total size = 128 bytes */
+extern struct memnode memnode;
+#define memnode_shift memnode.shift
+#define memnodemap memnode.map
+#define memnodemapsize memnode.mapsize
+
+extern struct pglist_data *node_data[];
+
+static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
+{
+ unsigned nid;
+ VIRTUAL_BUG_ON(!memnodemap);
+ nid = memnodemap[addr >> memnode_shift];
+ VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]);
+ return nid;
+}
+
+#define NODE_DATA(nid) (node_data[nid])
+
+#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
+#define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \
+ NODE_DATA(nid)->node_spanned_pages)
+
+extern int early_pfn_to_nid(unsigned long pfn);
+
+#ifdef CONFIG_NUMA_EMU
+#define FAKE_NODE_MIN_SIZE (64 * 1024 * 1024)
+#define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1UL))
+#endif
+
+#endif
+#endif /* ASM_X86__MMZONE_64_H */