Commit | Line | Data |
---|---|---|
89da76fd SY |
1 | /* |
2 | * Copyright (C) 2016, VMware, Inc. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
12 | * NON INFRINGEMENT. See the GNU General Public License for more | |
13 | * details. | |
14 | * | |
15 | * Based on code from vmware.c and vmmouse.c. | |
16 | * Author: | |
17 | * Sinclair Yeh <syeh@vmware.com> | |
18 | */ | |
19 | #ifndef _VMWGFX_MSG_H | |
20 | #define _VMWGFX_MSG_H | |
21 | ||
22 | ||
23 | /** | |
24 | * Hypervisor-specific bi-directional communication channel. Should never | |
25 | * execute on bare metal hardware. The caller must make sure to check for | |
26 | * supported hypervisor before using these macros. | |
27 | * | |
28 | * The last two parameters are both input and output and must be initialized. | |
29 | * | |
30 | * @cmd: [IN] Message Cmd | |
31 | * @in_ebx: [IN] Message Len, through EBX | |
32 | * @in_si: [IN] Input argument through SI, set to 0 if not used | |
33 | * @in_di: [IN] Input argument through DI, set ot 0 if not used | |
34 | * @port_num: [IN] port number + [channel id] | |
35 | * @magic: [IN] hypervisor magic value | |
36 | * @eax: [OUT] value of EAX register | |
37 | * @ebx: [OUT] e.g. status from an HB message status command | |
38 | * @ecx: [OUT] e.g. status from a non-HB message status command | |
39 | * @edx: [OUT] e.g. channel id | |
40 | * @si: [OUT] | |
41 | * @di: [OUT] | |
42 | */ | |
43 | #define VMW_PORT(cmd, in_ebx, in_si, in_di, \ | |
44 | port_num, magic, \ | |
45 | eax, ebx, ecx, edx, si, di) \ | |
46 | ({ \ | |
47 | asm volatile ("inl %%dx, %%eax;" : \ | |
48 | "=a"(eax), \ | |
49 | "=b"(ebx), \ | |
50 | "=c"(ecx), \ | |
51 | "=d"(edx), \ | |
52 | "=S"(si), \ | |
53 | "=D"(di) : \ | |
54 | "a"(magic), \ | |
55 | "b"(in_ebx), \ | |
56 | "c"(cmd), \ | |
57 | "d"(port_num), \ | |
58 | "S"(in_si), \ | |
59 | "D"(in_di) : \ | |
60 | "memory"); \ | |
61 | }) | |
62 | ||
63 | ||
64 | /** | |
65 | * Hypervisor-specific bi-directional communication channel. Should never | |
66 | * execute on bare metal hardware. The caller must make sure to check for | |
67 | * supported hypervisor before using these macros. | |
68 | * | |
69 | * The last 3 parameters are both input and output and must be initialized. | |
70 | * | |
71 | * @cmd: [IN] Message Cmd | |
72 | * @in_ecx: [IN] Message Len, through ECX | |
73 | * @in_si: [IN] Input argument through SI, set to 0 if not used | |
74 | * @in_di: [IN] Input argument through DI, set to 0 if not used | |
75 | * @port_num: [IN] port number + [channel id] | |
76 | * @magic: [IN] hypervisor magic value | |
77 | * @bp: [IN] | |
78 | * @eax: [OUT] value of EAX register | |
79 | * @ebx: [OUT] e.g. status from an HB message status command | |
80 | * @ecx: [OUT] e.g. status from a non-HB message status command | |
81 | * @edx: [OUT] e.g. channel id | |
82 | * @si: [OUT] | |
83 | * @di: [OUT] | |
84 | */ | |
85 | #ifdef __x86_64__ | |
86 | ||
87 | #define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \ | |
88 | port_num, magic, bp, \ | |
89 | eax, ebx, ecx, edx, si, di) \ | |
90 | ({ \ | |
91 | asm volatile ("push %%rbp;" \ | |
92 | "mov %12, %%rbp;" \ | |
93 | "rep outsb;" \ | |
94 | "pop %%rbp;" : \ | |
95 | "=a"(eax), \ | |
96 | "=b"(ebx), \ | |
97 | "=c"(ecx), \ | |
98 | "=d"(edx), \ | |
99 | "=S"(si), \ | |
100 | "=D"(di) : \ | |
101 | "a"(magic), \ | |
102 | "b"(cmd), \ | |
103 | "c"(in_ecx), \ | |
104 | "d"(port_num), \ | |
105 | "S"(in_si), \ | |
106 | "D"(in_di), \ | |
107 | "r"(bp) : \ | |
108 | "memory", "cc"); \ | |
109 | }) | |
110 | ||
111 | ||
112 | #define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \ | |
113 | port_num, magic, bp, \ | |
114 | eax, ebx, ecx, edx, si, di) \ | |
115 | ({ \ | |
116 | asm volatile ("push %%rbp;" \ | |
117 | "mov %12, %%rbp;" \ | |
118 | "rep insb;" \ | |
119 | "pop %%rbp" : \ | |
120 | "=a"(eax), \ | |
121 | "=b"(ebx), \ | |
122 | "=c"(ecx), \ | |
123 | "=d"(edx), \ | |
124 | "=S"(si), \ | |
125 | "=D"(di) : \ | |
126 | "a"(magic), \ | |
127 | "b"(cmd), \ | |
128 | "c"(in_ecx), \ | |
129 | "d"(port_num), \ | |
130 | "S"(in_si), \ | |
131 | "D"(in_di), \ | |
132 | "r"(bp) : \ | |
133 | "memory", "cc"); \ | |
134 | }) | |
135 | ||
136 | #else | |
137 | ||
138 | /* In the 32-bit version of this macro, we use "m" because there is no | |
139 | * more register left for bp | |
140 | */ | |
141 | #define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \ | |
142 | port_num, magic, bp, \ | |
143 | eax, ebx, ecx, edx, si, di) \ | |
144 | ({ \ | |
145 | asm volatile ("push %%ebp;" \ | |
146 | "mov %12, %%ebp;" \ | |
147 | "rep outsb;" \ | |
148 | "pop %%ebp;" : \ | |
149 | "=a"(eax), \ | |
150 | "=b"(ebx), \ | |
151 | "=c"(ecx), \ | |
152 | "=d"(edx), \ | |
153 | "=S"(si), \ | |
154 | "=D"(di) : \ | |
155 | "a"(magic), \ | |
156 | "b"(cmd), \ | |
157 | "c"(in_ecx), \ | |
158 | "d"(port_num), \ | |
159 | "S"(in_si), \ | |
160 | "D"(in_di), \ | |
161 | "m"(bp) : \ | |
162 | "memory", "cc"); \ | |
163 | }) | |
164 | ||
165 | ||
166 | #define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \ | |
167 | port_num, magic, bp, \ | |
168 | eax, ebx, ecx, edx, si, di) \ | |
169 | ({ \ | |
170 | asm volatile ("push %%ebp;" \ | |
171 | "mov %12, %%ebp;" \ | |
172 | "rep insb;" \ | |
173 | "pop %%ebp" : \ | |
174 | "=a"(eax), \ | |
175 | "=b"(ebx), \ | |
176 | "=c"(ecx), \ | |
177 | "=d"(edx), \ | |
178 | "=S"(si), \ | |
179 | "=D"(di) : \ | |
180 | "a"(magic), \ | |
181 | "b"(cmd), \ | |
182 | "c"(in_ecx), \ | |
183 | "d"(port_num), \ | |
184 | "S"(in_si), \ | |
185 | "D"(in_di), \ | |
186 | "m"(bp) : \ | |
187 | "memory", "cc"); \ | |
188 | }) | |
189 | #endif /* #if __x86_64__ */ | |
190 | ||
191 | #endif |