include/asm-x86/nops.h

   1 #ifndef _ASM_NOPS_H
   2 #define _ASM_NOPS_H 1
   3
   4 /* Define nops for use with alternative() */
   5
   6 /* generic versions from gas */
   7 #define GENERIC_NOP1    ".byte 0x90\n"
   8 #define GENERIC_NOP2            ".byte 0x89,0xf6\n"
   9 #define GENERIC_NOP3        ".byte 0x8d,0x76,0x00\n"
  10 #define GENERIC_NOP4        ".byte 0x8d,0x74,0x26,0x00\n"
  11 #define GENERIC_NOP5        GENERIC_NOP1 GENERIC_NOP4
  12 #define GENERIC_NOP6    ".byte 0x8d,0xb6,0x00,0x00,0x00,0x00\n"
  13 #define GENERIC_NOP7    ".byte 0x8d,0xb4,0x26,0x00,0x00,0x00,0x00\n"
  14 #define GENERIC_NOP8    GENERIC_NOP1 GENERIC_NOP7
  15
  16 /* Opteron 64bit nops */
  17 #define K8_NOP1 GENERIC_NOP1
  18 #define K8_NOP2 ".byte 0x66,0x90\n"
  19 #define K8_NOP3 ".byte 0x66,0x66,0x90\n"
  20 #define K8_NOP4 ".byte 0x66,0x66,0x66,0x90\n"
  21 #define K8_NOP5 K8_NOP3 K8_NOP2
  22 #define K8_NOP6 K8_NOP3 K8_NOP3
  23 #define K8_NOP7 K8_NOP4 K8_NOP3
  24 #define K8_NOP8 K8_NOP4 K8_NOP4
  25
  26 /* K7 nops */
  27 /* uses eax dependencies (arbitary choice) */
  28 #define K7_NOP1  GENERIC_NOP1
  29 #define K7_NOP2 ".byte 0x8b,0xc0\n"
  30 #define K7_NOP3 ".byte 0x8d,0x04,0x20\n"
  31 #define K7_NOP4 ".byte 0x8d,0x44,0x20,0x00\n"
  32 #define K7_NOP5 K7_NOP4 ASM_NOP1
  33 #define K7_NOP6 ".byte 0x8d,0x80,0,0,0,0\n"
  34 #define K7_NOP7        ".byte 0x8D,0x04,0x05,0,0,0,0\n"
  35 #define K7_NOP8        K7_NOP7 ASM_NOP1
  36
  37 /* P6 nops */
  38 /* uses eax dependencies (Intel-recommended choice) */
  39 #define P6_NOP1 GENERIC_NOP1
  40 #define P6_NOP2 ".byte 0x66,0x90\n"
  41 #define P6_NOP3 ".byte 0x0f,0x1f,0x00\n"
  42 #define P6_NOP4 ".byte 0x0f,0x1f,0x40,0\n"
  43 #define P6_NOP5 ".byte 0x0f,0x1f,0x44,0x00,0\n"
  44 #define P6_NOP6 ".byte 0x66,0x0f,0x1f,0x44,0x00,0\n"
  45 #define P6_NOP7 ".byte 0x0f,0x1f,0x80,0,0,0,0\n"
  46 #define P6_NOP8 ".byte 0x0f,0x1f,0x84,0x00,0,0,0,0\n"
  47
  48 #if defined(CONFIG_MK8)
  49 #define ASM_NOP1 K8_NOP1
  50 #define ASM_NOP2 K8_NOP2
  51 #define ASM_NOP3 K8_NOP3
  52 #define ASM_NOP4 K8_NOP4
  53 #define ASM_NOP5 K8_NOP5
  54 #define ASM_NOP6 K8_NOP6
  55 #define ASM_NOP7 K8_NOP7
  56 #define ASM_NOP8 K8_NOP8
  57 #elif defined(CONFIG_MK7)
  58 #define ASM_NOP1 K7_NOP1
  59 #define ASM_NOP2 K7_NOP2
  60 #define ASM_NOP3 K7_NOP3
  61 #define ASM_NOP4 K7_NOP4
  62 #define ASM_NOP5 K7_NOP5
  63 #define ASM_NOP6 K7_NOP6
  64 #define ASM_NOP7 K7_NOP7
  65 #define ASM_NOP8 K7_NOP8
  66 #elif defined(CONFIG_M686) || defined(CONFIG_MPENTIUMII) || \
  67       defined(CONFIG_MPENTIUMIII) || defined(CONFIG_MPENTIUMM) || \
  68       defined(CONFIG_MCORE2) || defined(CONFIG_PENTIUM4)
  69 #define ASM_NOP1 P6_NOP1
  70 #define ASM_NOP2 P6_NOP2
  71 #define ASM_NOP3 P6_NOP3
  72 #define ASM_NOP4 P6_NOP4
  73 #define ASM_NOP5 P6_NOP5
  74 #define ASM_NOP6 P6_NOP6
  75 #define ASM_NOP7 P6_NOP7
  76 #define ASM_NOP8 P6_NOP8
  77 #else
  78 #define ASM_NOP1 GENERIC_NOP1
  79 #define ASM_NOP2 GENERIC_NOP2
  80 #define ASM_NOP3 GENERIC_NOP3
  81 #define ASM_NOP4 GENERIC_NOP4
  82 #define ASM_NOP5 GENERIC_NOP5
  83 #define ASM_NOP6 GENERIC_NOP6
  84 #define ASM_NOP7 GENERIC_NOP7
  85 #define ASM_NOP8 GENERIC_NOP8
  86 #endif
  87
  88 #define ASM_NOP_MAX 8
  89
  90 #endif