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__ 24 extern 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