1#ifndef _ASM_FIXMAP_H 2#define _ASM_FIXMAP_H 3 4/* 5 * This file defines the locations of the fixed mappings on parisc. 6 * 7 * All of the values in this file are machine virtual addresses. 8 * 9 * All of the values in this file must be <4GB (because of assembly 10 * loading restrictions). If you place this region anywhere above 11 * __PAGE_OFFSET, you must adjust the memory map accordingly */ 12 13/* The alias region is used in kernel space to do copy/clear to or 14 * from areas congruently mapped with user space. It is 8MB large 15 * and must be 16MB aligned */ 16#define TMPALIAS_MAP_START ((__PAGE_OFFSET) - 16*1024*1024) 17/* This is the kernel area for all maps (vmalloc, dma etc.) most 18 * usually, it extends up to TMPALIAS_MAP_START. Virtual addresses 19 * 0..GATEWAY_PAGE_SIZE are reserved for the gateway page */ 20#define KERNEL_MAP_START (GATEWAY_PAGE_SIZE) 21#define KERNEL_MAP_END (TMPALIAS_MAP_START) 22 23#ifndef __ASSEMBLY__ 24extern void *parisc_vmalloc_start; 25#define PCXL_DMA_MAP_SIZE (8*1024*1024) 26#define VMALLOC_START ((unsigned long)parisc_vmalloc_start) 27#define VMALLOC_END (KERNEL_MAP_END) 28#endif /*__ASSEMBLY__*/ 29 30#endif /*_ASM_FIXMAP_H*/ 31