LXR linux/arch/powerpc/include/asm/disassemble.h

   1/*
   2 * This program is free software; you can redistribute it and/or modify
   3 * it under the terms of the GNU General Public License, version 2, as
   4 * published by the Free Software Foundation.
   5 *
   6 * This program is distributed in the hope that it will be useful,
   7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9 * GNU General Public License for more details.
  10 *
  11 * You should have received a copy of the GNU General Public License
  12 * along with this program; if not, write to the Free Software
  13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14 *
  15 * Copyright IBM Corp. 2008
  16 *
  17 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  18 */
  19
  20#ifndef __ASM_PPC_DISASSEMBLE_H__
  21#define __ASM_PPC_DISASSEMBLE_H__
  22
  23#include <linux/types.h>
  24
  25static inline unsigned int get_op(u32 inst)
  26{
  27        return inst >> 26;
  28}
  29
  30static inline unsigned int get_xop(u32 inst)
  31{
  32        return (inst >> 1) & 0x3ff;
  33}
  34
  35static inline unsigned int get_sprn(u32 inst)
  36{
  37        return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
  38}
  39
  40static inline unsigned int get_dcrn(u32 inst)
  41{
  42        return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
  43}
  44
  45static inline unsigned int get_tmrn(u32 inst)
  46{
  47        return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
  48}
  49
  50static inline unsigned int get_rt(u32 inst)
  51{
  52        return (inst >> 21) & 0x1f;
  53}
  54
  55static inline unsigned int get_rs(u32 inst)
  56{
  57        return (inst >> 21) & 0x1f;
  58}
  59
  60static inline unsigned int get_ra(u32 inst)
  61{
  62        return (inst >> 16) & 0x1f;
  63}
  64
  65static inline unsigned int get_rb(u32 inst)
  66{
  67        return (inst >> 11) & 0x1f;
  68}
  69
  70static inline unsigned int get_rc(u32 inst)
  71{
  72        return inst & 0x1;
  73}
  74
  75static inline unsigned int get_ws(u32 inst)
  76{
  77        return (inst >> 11) & 0x1f;
  78}
  79
  80static inline unsigned int get_d(u32 inst)
  81{
  82        return inst & 0xffff;
  83}
  84
  85static inline unsigned int get_oc(u32 inst)
  86{
  87        return (inst >> 11) & 0x7fff;
  88}
  89
  90static inline unsigned int get_tx_or_sx(u32 inst)
  91{
  92        return (inst) & 0x1;
  93}
  94
  95#define IS_XFORM(inst)  (get_op(inst)  == 31)
  96#define IS_DSFORM(inst) (get_op(inst) >= 56)
  97
  98/*
  99 * Create a DSISR value from the instruction
 100 */
 101static inline unsigned make_dsisr(unsigned instr)
 102{
 103        unsigned dsisr;
 104
 105
 106        /* bits  6:15 --> 22:31 */
 107        dsisr = (instr & 0x03ff0000) >> 16;
 108
 109        if (IS_XFORM(instr)) {
 110                /* bits 29:30 --> 15:16 */
 111                dsisr |= (instr & 0x00000006) << 14;
 112                /* bit     25 -->    17 */
 113                dsisr |= (instr & 0x00000040) << 8;
 114                /* bits 21:24 --> 18:21 */
 115                dsisr |= (instr & 0x00000780) << 3;
 116        } else {
 117                /* bit      5 -->    17 */
 118                dsisr |= (instr & 0x04000000) >> 12;
 119                /* bits  1: 4 --> 18:21 */
 120                dsisr |= (instr & 0x78000000) >> 17;
 121                /* bits 30:31 --> 12:13 */
 122                if (IS_DSFORM(instr))
 123                        dsisr |= (instr & 0x00000003) << 18;
 124        }
 125
 126        return dsisr;
 127}
 128#endif /* __ASM_PPC_DISASSEMBLE_H__ */
 129