arch/powerpc/boot/ppc_asm.h

   1 #ifndef _PPC64_PPC_ASM_H
   2 #define _PPC64_PPC_ASM_H
   3 /*
   4  *
   5  * Definitions used by various bits of low-level assembly code on PowerPC.
   6  *
   7  * Copyright (C) 1995-1999 Gary Thomas, Paul Mackerras, Cort Dougan.
   8  *
   9  *  This program is free software; you can redistribute it and/or
  10  *  modify it under the terms of the GNU General Public License
  11  *  as published by the Free Software Foundation; either version
  12  *  2 of the License, or (at your option) any later version.
  13  */
  14
  15 /* Condition Register Bit Fields */
  16
  17 #define cr0     0
  18 #define cr1     1
  19 #define cr2     2
  20 #define cr3     3
  21 #define cr4     4
  22 #define cr5     5
  23 #define cr6     6
  24 #define cr7     7
  25
  26
  27 /* General Purpose Registers (GPRs) */
  28
  29 #define r0      0
  30 #define r1      1
  31 #define r2      2
  32 #define r3      3
  33 #define r4      4
  34 #define r5      5
  35 #define r6      6
  36 #define r7      7
  37 #define r8      8
  38 #define r9      9
  39 #define r10     10
  40 #define r11     11
  41 #define r12     12
  42 #define r13     13
  43 #define r14     14
  44 #define r15     15
  45 #define r16     16
  46 #define r17     17
  47 #define r18     18
  48 #define r19     19
  49 #define r20     20
  50 #define r21     21
  51 #define r22     22
  52 #define r23     23
  53 #define r24     24
  54 #define r25     25
  55 #define r26     26
  56 #define r27     27
  57 #define r28     28
  58 #define r29     29
  59 #define r30     30
  60 #define r31     31
  61
  62 #define SPRN_TBRL       268
  63 #define SPRN_TBRU       269
  64 #define SPRN_HSRR0      0x13A   /* Hypervisor Save/Restore 0 */
  65 #define SPRN_HSRR1      0x13B   /* Hypervisor Save/Restore 1 */
  66
  67 #define MSR_LE          0x0000000000000001
  68
  69 #define FIXUP_ENDIAN                                               \
  70         tdi   0,0,0x48;   /* Reverse endian of b . + 8          */ \
  71         b     $+44;       /* Skip trampoline if endian is good  */ \
  72         .long 0xa600607d; /* mfmsr r11                          */ \
  73         .long 0x01006b69; /* xori r11,r11,1                     */ \
  74         .long 0x00004039; /* li r10,0                           */ \
  75         .long 0x6401417d; /* mtmsrd r10,1                       */ \
  76         .long 0x05009f42; /* bcl 20,31,$+4                      */ \
  77         .long 0xa602487d; /* mflr r10                           */ \
  78         .long 0x14004a39; /* addi r10,r10,20                    */ \
  79         .long 0xa6035a7d; /* mtsrr0 r10                         */ \
  80         .long 0xa6037b7d; /* mtsrr1 r11                         */ \
  81         .long 0x2400004c  /* rfid                               */
  82
  83 #ifdef CONFIG_PPC_8xx
  84 #define MFTBL(dest)                     mftb dest
  85 #define MFTBU(dest)                     mftbu dest
  86 #else
  87 #define MFTBL(dest)                     mfspr dest, SPRN_TBRL
  88 #define MFTBU(dest)                     mfspr dest, SPRN_TBRU
  89 #endif
  90
  91 #endif /* _PPC64_PPC_ASM_H */