i386/linux/linux-2.3.21/arch/sparc64/lib/VIS.h

   1 /* $Id: VIS.h,v 1.4 1999/05/25 16:52:50 jj Exp $
   2  * VIS.h: High speed copy/clear operations utilizing the UltraSparc
   3  *        Visual Instruction Set.
   4  *
   5  * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
   6  * Copyright (C) 1996, 1997, 1999 Jakub Jelinek (jj@ultra.linux.cz)
   7  */
   8
   9         /* VIS code can be used for numerous copy/set operation variants.
  10          * It can be made to work in the kernel, one single instance,
  11          * for all of memcpy, copy_to_user, and copy_from_user by setting
  12          * the ASI src/dest globals correctly.  Furthermore it can
  13          * be used for kernel-->kernel page copies as well, a hook label
  14          * is put in here just for this purpose.
  15          *
  16          * For userland, compiling this without __KERNEL__ defined makes
  17          * it work just fine as a generic libc bcopy and memcpy.
  18          * If for userland it is compiled with a 32bit gcc (but you need
  19          * -Wa,-Av9a), the code will just rely on lower 32bits of
  20          * IEU registers, if you compile it with 64bit gcc (ie. define
  21          * __sparc_v9__), the code will use full 64bit.
  22          */
  23
  24 #ifndef __VIS_H
  25 #define __VIS_H
  26
  27 #ifdef __KERNEL__
  28 #include <asm/head.h>
  29 #include <asm/asi.h>
  30 #else
  31 #define ASI_AIUS                0x11 /* Secondary, user                         */
  32 #define ASI_BLK_AIUS            0x71 /* Secondary, user, blk ld/st              */
  33 #define ASI_P                   0x80 /* Primary, implicit                       */
  34 #define ASI_S                   0x81 /* Secondary, implicit                     */
  35 #define ASI_BLK_COMMIT_P        0xe0 /* Primary, blk store commit               */
  36 #define ASI_BLK_COMMIT_S        0xe1 /* Secondary, blk store commit             */
  37 #define ASI_BLK_P               0xf0 /* Primary, blk ld/st                      */
  38 #define ASI_BLK_S               0xf1 /* Secondary, blk ld/st                    */
  39 #define FPRS_FEF                0x04
  40 #endif
  41
  42         /* I'm telling you, they really did this chip right.
  43          * Perhaps the SunSoft folks should visit some of the
  44          * people in Sun Microelectronics and start some brain
  45          * cell exchange program...
  46          */
  47 #define ASI_BLK_XOR             (ASI_P ^ ASI_BLK_P)
  48         /* Well, things get more hairy if we use ASI_AIUS as
  49          * USER_DS and ASI_P as KERNEL_DS, we'd reach
  50          * commit block stores this way which is not what we want...
  51          */
  52         /* ASI_P->ASI_BLK_P && ASI_AIUS->ASI_BLK_AIUS transitions can be done
  53          * as blkasi = asi | ASI_BLK_OR
  54          */
  55 #define ASI_BLK_OR              (ASI_BLK_P & ~ASI_P)
  56         /* Transition back from ASI_BLK_P->ASI_P && ASI_BLK_AIUS->ASI_AIUS is
  57          * more complicated:
  58          * asi = blkasi ^ (blkasi >> 3) ^ ASI_BLK_XOR1
  59          */
  60 #define ASI_BLK_XOR1            (ASI_BLK_P ^ (ASI_BLK_P >> 3) ^ ASI_P)
  61
  62 #define asi_src                 %o3
  63 #define asi_dest                %o4
  64
  65 #ifdef __KERNEL__
  66 #define ASI_SETSRC_BLK          wr      asi_src, 0, %asi;
  67 #define ASI_SETSRC_NOBLK        wr      asi_src, 0, %asi;
  68 #define ASI_SETDST_BLK          wr      asi_dest, 0, %asi;
  69 #define ASI_SETDST_NOBLK        wr      asi_dest, 0, %asi;
  70 #define ASIBLK                  %asi
  71 #define ASINORMAL               %asi
  72 #define LDUB                    lduba
  73 #define LDUH                    lduha
  74 #define LDUW                    lduwa
  75 #define LDX                     ldxa
  76 #define LDD                     ldda
  77 #define LDDF                    ldda
  78 #define LDBLK                   ldda
  79 #define STB                     stba
  80 #define STH                     stha
  81 #define STW                     stwa
  82 #define STD                     stda
  83 #define STX                     stxa
  84 #define STDF                    stda
  85 #define STBLK                   stda
  86 #else
  87 #define ASI_SETSRC_BLK
  88 #define ASI_SETSRC_NOBLK
  89 #define ASI_SETDST_BLK
  90 #define ASI_SETDST_NOBLK
  91 #define ASI_SETDST_SPECIAL
  92 #define ASIBLK                  %asi
  93 #define ASINORMAL
  94 #define LDUB                    ldub
  95 #define LDUH                    lduh
  96 #define LDUW                    lduw
  97 #define LDD                     ldd
  98 #define LDX                     ldx
  99 #define LDDF                    ldd
 100 #define LDBLK                   ldda
 101 #define STB                     stb
 102 #define STH                     sth
 103 #define STW                     stw
 104 #define STD                     std
 105 #define STX                     stx
 106 #define STDF                    std
 107 #define STBLK                   stda
 108 #endif
 109
 110 #ifdef __KERNEL__
 111
 112 #define REGS_64BIT
 113
 114 #else
 115
 116 #ifndef REGS_64BIT
 117 #ifdef __sparc_v9__
 118 #define REGS_64BIT
 119 #endif
 120 #endif
 121
 122 #endif
 123
 124 #ifndef REGS_64BIT
 125 #define xcc     icc
 126 #endif
 127
 128 #endif