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
  25 static inline unsigned int get_op(u32 inst)
  26 {
  27         return inst >> 26;
  28 }
  29
  30 static inline unsigned int get_xop(u32 inst)
  31 {
  32         return (inst >> 1) & 0x3ff;
  33 }
  34
  35 static inline unsigned int get_sprn(u32 inst)
  36 {
  37         return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
  38 }
  39
  40 static inline unsigned int get_dcrn(u32 inst)
  41 {
  42         return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
  43 }
  44
  45 static inline unsigned int get_rt(u32 inst)
  46 {
  47         return (inst >> 21) & 0x1f;
  48 }
  49
  50 static inline unsigned int get_rs(u32 inst)
  51 {
  52         return (inst >> 21) & 0x1f;
  53 }
  54
  55 static inline unsigned int get_ra(u32 inst)
  56 {
  57         return (inst >> 16) & 0x1f;
  58 }
  59
  60 static inline unsigned int get_rb(u32 inst)
  61 {
  62         return (inst >> 11) & 0x1f;
  63 }
  64
  65 static inline unsigned int get_rc(u32 inst)
  66 {
  67         return inst & 0x1;
  68 }
  69
  70 static inline unsigned int get_ws(u32 inst)
  71 {
  72         return (inst >> 11) & 0x1f;
  73 }
  74
  75 static inline unsigned int get_d(u32 inst)
  76 {
  77         return inst & 0xffff;
  78 }
  79
  80 static inline unsigned int get_oc(u32 inst)
  81 {
  82         return (inst >> 11) & 0x7fff;
  83 }
  84
  85 #define IS_XFORM(inst)  (get_op(inst)  == 31)
  86 #define IS_DSFORM(inst) (get_op(inst) >= 56)
  87
  88 /*
  89  * Create a DSISR value from the instruction
  90  */
  91 static inline unsigned make_dsisr(unsigned instr)
  92 {
  93         unsigned dsisr;
  94
  95
  96         /* bits  6:15 --> 22:31 */
  97         dsisr = (instr & 0x03ff0000) >> 16;
  98
  99         if (IS_XFORM(instr)) {
 100                 /* bits 29:30 --> 15:16 */
 101                 dsisr |= (instr & 0x00000006) << 14;
 102                 /* bit     25 -->    17 */
 103                 dsisr |= (instr & 0x00000040) << 8;
 104                 /* bits 21:24 --> 18:21 */
 105                 dsisr |= (instr & 0x00000780) << 3;
 106         } else {
 107                 /* bit      5 -->    17 */
 108                 dsisr |= (instr & 0x04000000) >> 12;
 109                 /* bits  1: 4 --> 18:21 */
 110                 dsisr |= (instr & 0x78000000) >> 17;
 111                 /* bits 30:31 --> 12:13 */
 112                 if (IS_DSFORM(instr))
 113                         dsisr |= (instr & 0x00000003) << 18;
 114         }
 115
 116         return dsisr;
 117 }
 118 #endif /* __ASM_PPC_DISASSEMBLE_H__ */