arch/parisc/include/asm/fixmap.h

   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*/