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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 1: nop
8 2: movl %esi,%esi
9 3: leal 0x00(%esi),%esi
10 4: leal 0x00(,%esi,1),%esi
11 6: leal 0x00000000(%esi),%esi
12 7: leal 0x00000000(,%esi,1),%esi
13*/
14#define GENERIC_NOP1 ".byte 0x90\n"
15#define GENERIC_NOP2 ".byte 0x89,0xf6\n"
16#define GENERIC_NOP3 ".byte 0x8d,0x76,0x00\n"
17#define GENERIC_NOP4 ".byte 0x8d,0x74,0x26,0x00\n"
18#define GENERIC_NOP5 GENERIC_NOP1 GENERIC_NOP4
19#define GENERIC_NOP6 ".byte 0x8d,0xb6,0x00,0x00,0x00,0x00\n"
20#define GENERIC_NOP7 ".byte 0x8d,0xb4,0x26,0x00,0x00,0x00,0x00\n"
21#define GENERIC_NOP8 GENERIC_NOP1 GENERIC_NOP7
22
23/* Opteron 64bit nops
24 1: nop
25 2: osp nop
26 3: osp osp nop
27 4: osp osp osp nop
28*/
29#define K8_NOP1 GENERIC_NOP1
30#define K8_NOP2 ".byte 0x66,0x90\n"
31#define K8_NOP3 ".byte 0x66,0x66,0x90\n"
32#define K8_NOP4 ".byte 0x66,0x66,0x66,0x90\n"
33#define K8_NOP5 K8_NOP3 K8_NOP2
34#define K8_NOP6 K8_NOP3 K8_NOP3
35#define K8_NOP7 K8_NOP4 K8_NOP3
36#define K8_NOP8 K8_NOP4 K8_NOP4
37
38/* K7 nops
39 uses eax dependencies (arbitary choice)
40 1: nop
41 2: movl %eax,%eax
42 3: leal (,%eax,1),%eax
43 4: leal 0x00(,%eax,1),%eax
44 6: leal 0x00000000(%eax),%eax
45 7: leal 0x00000000(,%eax,1),%eax
46*/
47#define K7_NOP1 GENERIC_NOP1
48#define K7_NOP2 ".byte 0x8b,0xc0\n"
49#define K7_NOP3 ".byte 0x8d,0x04,0x20\n"
50#define K7_NOP4 ".byte 0x8d,0x44,0x20,0x00\n"
51#define K7_NOP5 K7_NOP4 ASM_NOP1
52#define K7_NOP6 ".byte 0x8d,0x80,0,0,0,0\n"
53#define K7_NOP7 ".byte 0x8D,0x04,0x05,0,0,0,0\n"
54#define K7_NOP8 K7_NOP7 ASM_NOP1
55
56/* P6 nops
57 uses eax dependencies (Intel-recommended choice)
58 1: nop
59 2: osp nop
60 3: nopl (%eax)
61 4: nopl 0x00(%eax)
62 5: nopl 0x00(%eax,%eax,1)
63 6: osp nopl 0x00(%eax,%eax,1)
64 7: nopl 0x00000000(%eax)
65 8: nopl 0x00000000(%eax,%eax,1)
66*/
67#define P6_NOP1 GENERIC_NOP1
68#define P6_NOP2 ".byte 0x66,0x90\n"
69#define P6_NOP3 ".byte 0x0f,0x1f,0x00\n"
70#define P6_NOP4 ".byte 0x0f,0x1f,0x40,0\n"
71#define P6_NOP5 ".byte 0x0f,0x1f,0x44,0x00,0\n"
72#define P6_NOP6 ".byte 0x66,0x0f,0x1f,0x44,0x00,0\n"
73#define P6_NOP7 ".byte 0x0f,0x1f,0x80,0,0,0,0\n"
74#define P6_NOP8 ".byte 0x0f,0x1f,0x84,0x00,0,0,0,0\n"
75
76#if defined(CONFIG_MK8)
77#define ASM_NOP1 K8_NOP1
78#define ASM_NOP2 K8_NOP2
79#define ASM_NOP3 K8_NOP3
80#define ASM_NOP4 K8_NOP4
81#define ASM_NOP5 K8_NOP5
82#define ASM_NOP6 K8_NOP6
83#define ASM_NOP7 K8_NOP7
84#define ASM_NOP8 K8_NOP8
85#elif defined(CONFIG_MK7)
86#define ASM_NOP1 K7_NOP1
87#define ASM_NOP2 K7_NOP2
88#define ASM_NOP3 K7_NOP3
89#define ASM_NOP4 K7_NOP4
90#define ASM_NOP5 K7_NOP5
91#define ASM_NOP6 K7_NOP6
92#define ASM_NOP7 K7_NOP7
93#define ASM_NOP8 K7_NOP8
94#elif defined(CONFIG_X86_P6_NOP)
95#define ASM_NOP1 P6_NOP1
96#define ASM_NOP2 P6_NOP2
97#define ASM_NOP3 P6_NOP3
98#define ASM_NOP4 P6_NOP4
99#define ASM_NOP5 P6_NOP5
100#define ASM_NOP6 P6_NOP6
101#define ASM_NOP7 P6_NOP7
102#define ASM_NOP8 P6_NOP8
103#else
104#define ASM_NOP1 GENERIC_NOP1
105#define ASM_NOP2 GENERIC_NOP2
106#define ASM_NOP3 GENERIC_NOP3
107#define ASM_NOP4 GENERIC_NOP4
108#define ASM_NOP5 GENERIC_NOP5
109#define ASM_NOP6 GENERIC_NOP6
110#define ASM_NOP7 GENERIC_NOP7
111#define ASM_NOP8 GENERIC_NOP8
112#endif
113
114#define ASM_NOP_MAX 8
115
116#endif