Patch by Steven Scholz, 03 Apr 2005:

- create SoC specific directories include/asm-arm/arch-imx and
  include/asm-arm/arch-s3c24x0

1 files changed, 162 insertions, 0 deletions

diff --git a/include/asm-arm/arch-s3c24x0/memory.h b/include/asm-arm/arch-s3c24x0/memory.h
new file mode 100644
index 0000000000..333f218679
--- /dev/null
+++ b/include/asm-arm/arch-s3c24x0/memory.h
@@ -0,0 +1,162 @@
+/*
+ * linux/include/asm-arm/arch-s3c2400/memory.h by gj@denx.de
+ * based on
+ * linux/include/asm-arm/arch-sa1100/memory.h
+ *
+ * Copyright (c) 1999 Nicolas Pitre <nico@visuaide.com>
+ */
+
+#ifndef __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+
+
+/*
+ * Task size: 3GB
+ */
+#define TASK_SIZE       (0xc0000000UL)
+#define TASK_SIZE_26	(0x04000000UL)
+
+/*
+ * This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
+
+/*
+ * Page offset: 3GB
+ */
+#define PAGE_OFFSET     (0xc0000000UL)
+
+/*
+ * Physical DRAM offset is 0x0c000000 on the S3C2400
+ */
+#define PHYS_OFFSET	(0x0c000000UL)
+
+#include <linux/config.h>
+
+
+/* Modified for S3C2400, by chc, 20010509 */
+#define RAM_IN_BANK_0  32*1024*1024
+#define RAM_IN_BANK_1  0
+#define RAM_IN_BANK_2  0
+#define RAM_IN_BANK_3  0
+
+#define MEM_SIZE  (RAM_IN_BANK_0+RAM_IN_BANK_1+RAM_IN_BANK_2+RAM_IN_BANK_3)
+
+
+/* translation macros */
+#define __virt_to_phys__is_a_macro
+#define __phys_to_virt__is_a_macro
+
+#if (RAM_IN_BANK_1 + RAM_IN_BANK_2 + RAM_IN_BANK_3 == 0)
+
+#define __virt_to_phys(x) ( (x) - PAGE_OFFSET + 0x0c000000 )
+#define __phys_to_virt(x) ( (x) - 0x0c000000 + PAGE_OFFSET )
+
+#elif (RAM_IN_BANK_0 == RAM_IN_BANK_1) && \
+      (RAM_IN_BANK_2 + RAM_IN_BANK_3 == 0)
+
+/* Two identical banks */
+#define __virt_to_phys(x) \
+	  ( ((x) < PAGE_OFFSET+RAM_IN_BANK_0) ? \
+	    ((x) - PAGE_OFFSET + _DRAMBnk0) : \
+	    ((x) - PAGE_OFFSET - RAM_IN_BANK_0 + _DRAMBnk1) )
+#define __phys_to_virt(x) \
+	  ( ((x)&0x07ffffff) + \
+	    (((x)&0x08000000) ? PAGE_OFFSET+RAM_IN_BANK_0 : PAGE_OFFSET) )
+#else
+
+/* It's more efficient for all other cases to use the function call */
+#undef __virt_to_phys__is_a_macro
+#undef __phys_to_virt__is_a_macro
+extern unsigned long __virt_to_phys(unsigned long vpage);
+extern unsigned long __phys_to_virt(unsigned long ppage);
+
+#endif
+
+/*
+ * 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.
+ *
+ * On the SA1100, bus addresses are equivalent to physical addresses.
+ */
+#define __virt_to_bus__is_a_macro
+#define __virt_to_bus(x)        __virt_to_phys(x)
+#define __bus_to_virt__is_a_macro
+#define __bus_to_virt(x)        __phys_to_virt(x)
+
+
+#ifdef CONFIG_DISCONTIGMEM
+#error "CONFIG_DISCONTIGMEM will not work on S3C2400"
+/*
+ * 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
+ */
+
+#define NR_NODES	4
+
+/*
+ * Given a kernel address, find the home node of the underlying memory.
+ */
+#define KVADDR_TO_NID(addr) \
+		(((unsigned long)(addr) - 0xc0000000) >> 27)
+
+/*
+ * Given a physical address, convert it to a node id.
+ */
+#define PHYS_TO_NID(addr) KVADDR_TO_NID(__phys_to_virt(addr))
+
+/*
+ * 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)))
+
+/*
+ * 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(kvaddr) \
+	(((unsigned long)(kvaddr) & 0x07ffffff) >> PAGE_SHIFT)
+
+/*
+ * Given a kaddr, virt_to_page returns a pointer to the corresponding
+ * mem_map entry.
+ */
+#define virt_to_page(kaddr) \
+	(ADDR_TO_MAPBASE(kaddr) + LOCAL_MAP_NR(kaddr))
+
+/*
+ * VALID_PAGE returns a non-zero value if given page pointer is valid.
+ * This assumes all node's mem_maps are stored within the node they refer to.
+ */
+#define VALID_PAGE(page) \
+({ unsigned int node = KVADDR_TO_NID(page); \
+   ( (node < NR_NODES) && \
+     ((unsigned)((page) - NODE_MEM_MAP(node)) < NODE_DATA(node)->node_size) ); \
+})
+
+#else
+
+#define PHYS_TO_NID(addr)	(0)
+
+#endif
+#endif /* __ASM_ARCH_MEMORY_H */