summaryrefslogtreecommitdiff
path: root/include/asm-arm/arch-aaec2000/memory.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-arm/arch-aaec2000/memory.h')
-rw-r--r--include/asm-arm/arch-aaec2000/memory.h73
1 files changed, 73 insertions, 0 deletions
diff --git a/include/asm-arm/arch-aaec2000/memory.h b/include/asm-arm/arch-aaec2000/memory.h
new file mode 100644
index 000000000000..681b6a6171a1
--- /dev/null
+++ b/include/asm-arm/arch-aaec2000/memory.h
@@ -0,0 +1,73 @@
+/*
+ * linux/include/asm-arm/arch-aaec2000/memory.h
+ *
+ * Copyright (c) 2005 Nicolas Bellido Y Ortega
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+
+#include <linux/config.h>
+
+#define PHYS_OFFSET (0xf0000000UL)
+
+#define __virt_to_bus(x) __virt_to_phys(x)
+#define __bus_to_virt(x) __phys_to_virt(x)
+
+#ifdef CONFIG_DISCONTIGMEM
+
+/*
+ * The nodes are the followings:
+ *
+ * node 0: 0xf000.0000 - 0xf3ff.ffff
+ * node 1: 0xf400.0000 - 0xf7ff.ffff
+ * node 2: 0xf800.0000 - 0xfbff.ffff
+ * node 3: 0xfc00.0000 - 0xffff.ffff
+ */
+
+/*
+ * Given a kernel address, find the home node of the underlying memory.
+ */
+#define KVADDR_TO_NID(addr) \
+ (((unsigned long)(addr) - PAGE_OFFSET) >> NODE_MAX_MEM_SHIFT)
+
+/*
+ * Given a page frame number, convert it to a node id.
+ */
+#define PFN_TO_NID(pfn) \
+ (((pfn) - PHYS_PFN_OFFSET) >> (NODE_MAX_MEM_SHIFT - PAGE_SHIFT))
+
+/*
+ * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
+ * and return the mem_map of that node.
+ */
+#define ADDR_TO_MAPBASE(kaddr) NODE_MEM_MAP(KVADDR_TO_NID(kaddr))
+
+/*
+ * Given a page frame number, find the owning node of the memory
+ * and return the mem_map of that node.
+ */
+#define PFN_TO_MAPBASE(pfn) NODE_MEM_MAP(PFN_TO_NID(pfn))
+
+/*
+ * Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory
+ * and returns the index corresponding to the appropriate page in the
+ * node's mem_map.
+ */
+#define LOCAL_MAP_NR(addr) \
+ (((unsigned long)(addr) & (NODE_MAX_MEM_SIZE - 1)) >> PAGE_SHIFT)
+
+#define NODE_MAX_MEM_SHIFT 26
+#define NODE_MAX_MEM_SIZE (1 << NODE_MAX_MEM_SHIFT)
+
+#else
+
+#define PFN_TO_NID(addr) (0)
+
+#endif /* CONFIG_DISCONTIGMEM */
+
+#endif /* __ASM_ARCH_MEMORY_H */