LXR linux/arch/unicore32/include/asm/assembler.h

   1/*
   2 * linux/arch/unicore32/include/asm/assembler.h
   3 *
   4 * Code specific to PKUnity SoC and UniCore ISA
   5 *
   6 * Copyright (C) 2001-2010 GUAN Xue-tao
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11 *
  12 *  Do not include any C declarations in this file - it is included by
  13 *  assembler source.
  14 */
  15#ifndef __ASSEMBLY__
  16#error "Only include this from assembly code"
  17#endif
  18
  19#include <asm/ptrace.h>
  20
  21/*
  22 * Little Endian independent macros for shifting bytes within registers.
  23 */
  24#define pull            >>
  25#define push            <<
  26#define get_byte_0      << #0
  27#define get_byte_1      >> #8
  28#define get_byte_2      >> #16
  29#define get_byte_3      >> #24
  30#define put_byte_0      << #0
  31#define put_byte_1      << #8
  32#define put_byte_2      << #16
  33#define put_byte_3      << #24
  34
  35#define cadd            cmpadd
  36#define cand            cmpand
  37#define csub            cmpsub
  38#define cxor            cmpxor
  39
  40/*
  41 * Enable and disable interrupts
  42 */
  43        .macro disable_irq, temp
  44        mov     \temp, asr
  45        andn     \temp, \temp, #0xFF
  46        or      \temp, \temp, #PSR_I_BIT | PRIV_MODE
  47        mov.a   asr, \temp
  48        .endm
  49
  50        .macro enable_irq, temp
  51        mov     \temp, asr
  52        andn     \temp, \temp, #0xFF
  53        or      \temp, \temp, #PRIV_MODE
  54        mov.a   asr, \temp
  55        .endm
  56
  57#define USER(x...)                              \
  589999:   x;                                      \
  59        .pushsection __ex_table, "a";           \
  60        .align  3;                              \
  61        .long   9999b, 9001f;                   \
  62        .popsection
  63
  64        .macro  notcond, cond, nexti = .+8
  65        .ifc    \cond, eq
  66                bne     \nexti
  67        .else;  .ifc    \cond, ne
  68                beq     \nexti
  69        .else;  .ifc    \cond, ea
  70                bub     \nexti
  71        .else;  .ifc    \cond, ub
  72                bea     \nexti
  73        .else;  .ifc    \cond, fs
  74                bns     \nexti
  75        .else;  .ifc    \cond, ns
  76                bfs     \nexti
  77        .else;  .ifc    \cond, fv
  78                bnv     \nexti
  79        .else;  .ifc    \cond, nv
  80                bfv     \nexti
  81        .else;  .ifc    \cond, ua
  82                beb     \nexti
  83        .else;  .ifc    \cond, eb
  84                bua     \nexti
  85        .else;  .ifc    \cond, eg
  86                bsl     \nexti
  87        .else;  .ifc    \cond, sl
  88                beg     \nexti
  89        .else;  .ifc    \cond, sg
  90                bel     \nexti
  91        .else;  .ifc    \cond, el
  92                bsg     \nexti
  93        .else;  .ifnc   \cond, al
  94                .error  "Unknown cond in notcond macro argument"
  95        .endif; .endif; .endif; .endif; .endif; .endif; .endif
  96        .endif; .endif; .endif; .endif; .endif; .endif; .endif
  97        .endif
  98        .endm
  99
 100        .macro  usracc, instr, reg, ptr, inc, cond, rept, abort
 101        .rept   \rept
 102        notcond \cond, .+8
 1039999 :
 104        .if     \inc == 1
 105        \instr\()b.u \reg, [\ptr], #\inc
 106        .elseif \inc == 4
 107        \instr\()w.u \reg, [\ptr], #\inc
 108        .else
 109        .error  "Unsupported inc macro argument"
 110        .endif
 111
 112        .pushsection __ex_table, "a"
 113        .align  3
 114        .long   9999b, \abort
 115        .popsection
 116        .endr
 117        .endm
 118
 119        .macro  strusr, reg, ptr, inc, cond = al, rept = 1, abort = 9001f
 120        usracc  st, \reg, \ptr, \inc, \cond, \rept, \abort
 121        .endm
 122
 123        .macro  ldrusr, reg, ptr, inc, cond = al, rept = 1, abort = 9001f
 124        usracc  ld, \reg, \ptr, \inc, \cond, \rept, \abort
 125        .endm
 126
 127        .macro  nop8
 128        .rept   8
 129                nop
 130        .endr
 131        .endm
 132