1 files changed, 128 insertions, 0 deletions

diff --git a/include/asm-arm/arch-clps711x/memory.h b/include/asm-arm/arch-clps711x/memory.h
new file mode 100644
index 000000000000..bd978947db42
--- /dev/null
+++ b/include/asm-arm/arch-clps711x/memory.h
@@ -0,0 +1,128 @@
+/*
+ *  linux/include/asm-arm/arch-clps711x/memory.h
+ *
+ *  Copyright (C) 1999 ARM Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#ifndef __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+
+#include <linux/config.h>
+
+/*
+ * Physical DRAM offset.
+ */
+#define PHYS_OFFSET     (0xc0000000UL)
+
+/*
+ * Virtual view <-> DMA view memory address translations
+ * virt_to_bus: Used to translate the virtual address to an
+ *              address suitable to be passed to set_dma_addr
+ * bus_to_virt: Used to convert an address for DMA operations
+ *              to an address that the kernel can use.
+ */
+
+#if defined(CONFIG_ARCH_CDB89712)
+
+#define __virt_to_bus(x)        (x)
+#define __bus_to_virt(x)        (x)
+
+#elif defined (CONFIG_ARCH_AUTCPU12)
+
+#define __virt_to_bus(x)        (x)
+#define __bus_to_virt(x)        (x)
+
+#else
+
+#define __virt_to_bus(x)        ((x) - PAGE_OFFSET)
+#define __bus_to_virt(x)        ((x) + PAGE_OFFSET)
+
+#endif
+
+
+/*
+ * Like the SA1100, the EDB7211 has a large gap between physical RAM
+ * banks.  In 2.2, the Psion (CL-PS7110) port added custom support for
+ * discontiguous physical memory.  In 2.4, we can use the standard
+ * Linux NUMA support.
+ *
+ * This is not necessary for EP7211 implementations with only one used
+ * memory bank.  For those systems, simply undefine CONFIG_DISCONTIGMEM.
+ */
+
+#ifdef CONFIG_DISCONTIGMEM
+/*
+ * Because of the wide memory address space between physical RAM banks on the 
+ * SA1100, it's much more convenient to use Linux's NUMA support to implement
+ * our memory map representation.  Assuming all memory nodes have equal access 
+ * characteristics, we then have generic discontiguous memory support.
+ *
+ * Of course, all this isn't mandatory for SA1100 implementations with only
+ * one used memory bank.  For those, simply undefine CONFIG_DISCONTIGMEM.
+ *
+ * The nodes are matched with the physical memory bank addresses which are 
+ * incidentally the same as virtual addresses.
+ * 
+ *      node 0:  0xc0000000 - 0xc7ffffff
+ *      node 1:  0xc8000000 - 0xcfffffff
+ *      node 2:  0xd0000000 - 0xd7ffffff
+ *      node 3:  0xd8000000 - 0xdfffffff
+ */
+
+/*
+ * 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 returns the mem_map of that node.
+ */
+#define ADDR_TO_MAPBASE(kaddr) \
+                        NODE_MEM_MAP(KVADDR_TO_NID((unsigned long)(kaddr)))
+
+#define PFN_TO_MAPBASE(pfn)     NODE_MEM_MAP(PFN_TO_NID(pfn))
+
+/*
+ * Given a kaddr, LOCAL_MAR_NR 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)
+
+/*
+ * The PS7211 allows up to 256MB max per DRAM bank, but the EDB7211
+ * uses only one of the two banks (bank #1).  However, even within
+ * bank #1, memory is discontiguous.
+ *
+ * The EDB7211 has two 8MB DRAM areas with 8MB of empty space between
+ * them, so we use 24 for the node max shift to get 16MB node sizes.
+ */
+#define NODE_MAX_MEM_SHIFT      24
+#define NODE_MAX_MEM_SIZE       (1<<NODE_MAX_MEM_SHIFT)
+
+#endif /* CONFIG_DISCONTIGMEM */
+
+#endif
+