include/asm-sparc/vaddrs.h

/* */
   1 /* $Id: vaddrs.h,v 1.17 1996/01/10 21:00:16 davem Exp $ */
   2 #ifndef _SPARC_VADDRS_H
   3 #define _SPARC_VADDRS_H
   4 
   5 #include <asm/head.h>
   6 
   7 /* asm-sparc/vaddrs.h:  Here will be define the virtual addresses at
   8  *                      which important I/O addresses will be mapped.
   9  *                      For instance the timer register virtual address
  10  *                      is defined here.
  11  *
  12  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
  13  */
  14 
  15 /* I can see only one reason why we should have statically defined
  16  * mappings for devices and is the speedup improvements of not loading
  17  * a pointer and then the value in the assembly code
  18  */
  19 #define  IOBASE_VADDR   0xfe000000  /* Base for mapping pages */
  20 #define  IOBASE_LEN     0x00100000  /* Length of the IO area */
  21 #define  IOBASE_END     0xfe100000
  22 #define  DVMA_VADDR     0xfff00000  /* Base area of the DVMA on suns */
  23 #define  DVMA_LEN       0x00040000  /* Size of the DVMA address space */
  24 #define  DVMA_END       0xfff40000
  25 
  26 /* IOMMU Mapping area, must be on a 16MB boundry!  Note this
  27  * doesn't count the DVMA areas, the prom lives between the
  28  * iommu mapping area (for scsi transfer buffers) and the
  29  * dvma upper range (for lance packet ring buffers).
  30  */
  31 #define  IOMMU_VADDR    0xff000000
  32 #define  IOMMU_LEN      0x00c00000
  33 #define  IOMMU_END      0xffc00000 /* KADB debugger vm starts here */
  34 
  35 /* On the sun4/4c we don't need an IOMMU area, but we need a place
  36  * to reliably map locked down kernel data.  This includes the
  37  * task_struct and kernel stack pages of each process plus the
  38  * scsi buffers during dvma IO transfers, also the floppy buffers
  39  * during pseudo dma which runs with traps off (no faults allowed).
  40  * Some quick calculations yield:
  41  *       NR_TASKS <512> * (3 * PAGE_SIZE) == 0x600000
  42  * Subtract this from 0xc00000 and you get 0x927C0 of vm left
  43  * over to map SCSI dvma + floppy pseudo-dma buffers.  So be
  44  * careful if you change NR_TASKS or else there won't be enough
  45  * room for it all.
  46  */
  47 #define  SUN4C_LOCK_VADDR  0xff000000
  48 #define  SUN4C_LOCK_LEN    0x00c00000
  49 #define  SUN4C_LOCK_END    0xffc00000
  50 
  51 /* On sun4m machines we need per-cpu virtual areas */
  52 #define  PERCPU_VADDR   0xff000000  /* Base for per-cpu virtual mappings */
  53 #define  PERCPU_ENTSIZE 0x00100000
  54 #define  PERCPU_LEN     ((PERCPU_ENTSIZE*NCPUS))
  55 
  56 /* per-cpu offsets */
  57 #define  PERCPU_TBR_OFFSET      0x00000      /* %tbr, mainly used for identification. */
  58 #define  PERCPU_KSTACK_OFFSET   0x01000      /* Beginning of kernel stack for this cpu */
  59 #define  PERCPU_MBOX_OFFSET     0x02000      /* Prom SMP Mailbox */
  60 #define  PERCPU_CPUID_OFFSET    0x03000      /* Per-cpu ID number. */
  61 #define  PERCPU_ISALIVE_OFFSET  0x03004      /* Has CPU been initted yet? */
  62 #define  PERCPU_ISIDLING_OFFSET 0x03008      /* Is CPU in idle loop spinning? */
  63 
  64 #endif /* !(_SPARC_VADDRS_H) */
  65
/* */
root/include/asm-sparc/vaddrs.h

INCLUDED FROM
