1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_FIXMAP_H 3 #define _ASM_FIXMAP_H 4 5 /* 6 * This file defines the locations of the fixed mappings on parisc. 7 * 8 * All of the values in this file are machine virtual addresses. 9 * 10 * All of the values in this file must be <4GB (because of assembly 11 * loading restrictions). If you place this region anywhere above 12 * __PAGE_OFFSET, you must adjust the memory map accordingly */ 13 14 /* The alias region is used in kernel space to do copy/clear to or 15 * from areas congruently mapped with user space. It is 8MB large 16 * and must be 16MB aligned */ 17 #define TMPALIAS_MAP_START ((__PAGE_OFFSET) - 16*1024*1024) 18 /* This is the kernel area for all maps (vmalloc, dma etc.) most 19 * usually, it extends up to TMPALIAS_MAP_START. Virtual addresses 20 * 0..GATEWAY_PAGE_SIZE are reserved for the gateway page */ 21 #define KERNEL_MAP_START (GATEWAY_PAGE_SIZE) 22 #define KERNEL_MAP_END (TMPALIAS_MAP_START) 23 24 #ifndef __ASSEMBLY__ 25 extern void *parisc_vmalloc_start; 26 #define PCXL_DMA_MAP_SIZE (8*1024*1024) 27 #define VMALLOC_START ((unsigned long)parisc_vmalloc_start) 28 #define VMALLOC_END (KERNEL_MAP_END) 29 #endif /*__ASSEMBLY__*/ 30 31 #endif /*_ASM_FIXMAP_H*/ 32