1 /* 2 * linux/include/asm-arm/arch-arc/memory.h 3 * 4 * Copyright (C) 1996-1999 Russell King. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * Changelog: 11 * 22-Nov-1996 RMK Created 12 * 21-Mar-1999 RMK Renamed to memory.h 13 * RMK Moved PAGE_OFFSET and TASK_SIZE here 14 */ 15 #ifndef __ASM_ARCH_MEMORY_H 16 #define __ASM_ARCH_MEMORY_H 17 18 /* 19 * User space: 26MB 20 */ 21 #define TASK_SIZE (0x01a00000UL) 22 #define TASK_SIZE_26 (0x01a00000UL) 23 24 /* 25 * This decides where the kernel will search for a free chunk of vm 26 * space during mmap's. 27 */ 28 #define TASK_UNMAPPED_BASE (TASK_SIZE / 3) 29 30 /* 31 * Page offset: 32MB 32 */ 33 #define PAGE_OFFSET (0x02000000UL) 34 #define PHYS_OFFSET (0x02000000UL) 35 36 #define __virt_to_phys__is_a_macro 37 #define __virt_to_phys(vpage) vpage 38 #define __phys_to_virt__is_a_macro 39 #define __phys_to_virt(ppage) ppage 40 41 /* 42 * Virtual view <-> DMA view memory address translations 43 * virt_to_bus: Used to translate the virtual address to an 44 * address suitable to be passed to set_dma_addr 45 * bus_to_virt: Used to convert an address for DMA operations 46 * to an address that the kernel can use. 47 */ 48 #define __virt_to_bus__is_a_macro 49 #define __virt_to_bus(x) (x) 50 #define __bus_to_virt__is_a_macro 51 #define __bus_to_virt(x) (x) 52 53 #endif 54