1/* 2 * linux/include/asm-arm/arch-cl7500/memory.h 3 * 4 * Copyright (c) 1996,1997,1998 Russell King. 5 * 6 * Changelog: 7 * 20-Oct-1996 RMK Created 8 * 31-Dec-1997 RMK Fixed definitions to reduce warnings 9 * 11-Jan-1998 RMK Uninlined to reduce hits on cache 10 * 08-Feb-1998 RMK Added __virt_to_bus and __bus_to_virt 11 * 21-Mar-1999 RMK Renamed to memory.h 12 * RMK Added TASK_SIZE and PAGE_OFFSET 13 */ 14#ifndef __ASM_ARCH_MMU_H 15#define __ASM_ARCH_MMU_H 16 17/* 18 * Task size: 3GB 19 */ 20#define TASK_SIZE (0xc0000000UL) 21#define TASK_SIZE_26 (0x04000000UL) 22 23/* 24 * This decides where the kernel will search for a free chunk of vm 25 * space during mmap's. 26 */ 27#define TASK_UNMAPPED_BASE (TASK_SIZE / 3) 28 29/* 30 * Page offset: 3GB 31 */ 32#define PAGE_OFFSET (0xc0000000UL) 33#define PHYS_OFFSET (0x10000000UL) 34 35#define __virt_to_phys__is_a_macro 36#define __virt_to_phys(vpage) ((vpage) - PAGE_OFFSET + PHYS_OFFSET) 37#define __phys_to_virt__is_a_macro 38#define __phys_to_virt(ppage) ((ppage) + PAGE_OFFSET - PHYS_OFFSET) 39 40/* 41 * These are exactly the same on the RiscPC as the 42 * physical memory view. 43 */ 44#define __virt_to_bus__is_a_macro 45#define __virt_to_bus(x) __virt_to_phys(x) 46#define __bus_to_virt__is_a_macro 47#define __bus_to_virt(x) __phys_to_virt(x) 48 49#define PHYS_TO_NID(addr) (0) 50 51#endif 52