patch-2.3.23 linux/include/asm-arm/arch-sa1100/memory.h

• Lines: 47
• Date: Wed Oct 20 16:29:08 1999
• Orig file: v2.3.22/linux/include/asm-arm/arch-sa1100/memory.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.22/linux/include/asm-arm/arch-sa1100/memory.h linux/include/asm-arm/arch-sa1100/memory.h
@@ -0,0 +1,46 @@
+/*
+ * 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)
+
+/*
+ * Page offset: 3GB
+ */
+#define PAGE_OFFSET	 (0xc0000000UL)
+
+#define __virt_to_phys__is_a_macro
+#define __phys_to_virt__is_a_macro
+
+/*
+ * The following gives a maximum memory size of 128MB (32MB in each bank).
+ *
+ * Does this still need to be optimised for one bank machines?
+ */
+#define __virt_to_phys(x)	(((x) & 0xe0ffffff) | ((x) & 0x06000000) << 2)
+#define __phys_to_virt(x)	(((x) & 0xe7ffffff) | ((x) & 0x30000000) >> 2)
+
+/*
+ * 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 __bus_to_virt__is_a_macro
+#define __virt_to_bus(x)	 __virt_to_phys(x)
+#define __bus_to_virt(x)	 __phys_to_virt(x)
+
+#endif