arch/parisc/include/asm/fixmap.h

   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*/