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90803342 LE |
1 | ;------------------------------------------------------------------------------\r |
2 | ; @file\r | |
3 | ; A minimal Int10h stub that allows the Windows 2008 R2 SP1 UEFI guest's buggy,\r | |
4 | ; default VGA driver to switch to 1024x768x32, on the stdvga and QXL video\r | |
5 | ; cards of QEMU.\r | |
6 | ;\r | |
7 | ; Copyright (C) 2014, Red Hat, Inc.\r | |
8 | ; Copyright (c) 2013 - 2014, Intel Corporation. All rights reserved.<BR>\r | |
9 | ;\r | |
10 | ; This program and the accompanying materials are licensed and made available\r | |
11 | ; under the terms and conditions of the BSD License which accompanies this\r | |
12 | ; distribution. The full text of the license may be found at\r | |
13 | ; http://opensource.org/licenses/bsd-license.php\r | |
14 | ;\r | |
15 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r | |
16 | ; WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
17 | ;\r | |
18 | ;------------------------------------------------------------------------------\r | |
19 | \r | |
20 | ; enable this macro for debug messages\r | |
21 | ;%define DEBUG\r | |
22 | \r | |
23 | %macro DebugLog 1\r | |
24 | %ifdef DEBUG\r | |
25 | push si\r | |
26 | mov si, %1\r | |
27 | call PrintStringSi\r | |
28 | pop si\r | |
29 | %endif\r | |
30 | %endmacro\r | |
31 | \r | |
32 | \r | |
33 | BITS 16\r | |
34 | ORG 0\r | |
35 | \r | |
36 | VbeInfo:\r | |
37 | TIMES 256 nop\r | |
38 | \r | |
39 | VbeModeInfo:\r | |
40 | TIMES 256 nop\r | |
41 | \r | |
42 | \r | |
43 | Handler:\r | |
44 | cmp ax, 0x4f00\r | |
45 | je GetInfo\r | |
46 | cmp ax, 0x4f01\r | |
47 | je GetModeInfo\r | |
48 | cmp ax, 0x4f02\r | |
49 | je SetMode\r | |
50 | cmp ax, 0x4f03\r | |
51 | je GetMode\r | |
52 | cmp ax, 0x4f10\r | |
53 | je GetPmCapabilities\r | |
54 | cmp ax, 0x4f15\r | |
55 | je ReadEdid\r | |
56 | cmp ah, 0x00\r | |
57 | je SetModeLegacy\r | |
58 | DebugLog StrUnkownFunction\r | |
59 | Hang:\r | |
60 | jmp Hang\r | |
61 | \r | |
62 | \r | |
63 | GetInfo:\r | |
64 | push es\r | |
65 | push di\r | |
66 | push ds\r | |
67 | push si\r | |
68 | push cx\r | |
69 | \r | |
70 | DebugLog StrEnterGetInfo\r | |
71 | \r | |
72 | ; target (es:di) set on input\r | |
73 | push cs\r | |
74 | pop ds\r | |
75 | mov si, VbeInfo\r | |
76 | ; source (ds:si) set now\r | |
77 | \r | |
78 | mov cx, 256\r | |
79 | cld\r | |
80 | rep movsb\r | |
81 | \r | |
82 | pop cx\r | |
83 | pop si\r | |
84 | pop ds\r | |
85 | pop di\r | |
86 | pop es\r | |
87 | jmp Success\r | |
88 | \r | |
89 | \r | |
90 | GetModeInfo:\r | |
91 | push es\r | |
92 | push di\r | |
93 | push ds\r | |
94 | push si\r | |
95 | push cx\r | |
96 | \r | |
97 | DebugLog StrEnterGetModeInfo\r | |
98 | \r | |
99 | and cx, ~0x4000 ; clear potentially set LFB bit in mode number\r | |
100 | cmp cx, 0x00f1\r | |
101 | je KnownMode1\r | |
102 | DebugLog StrUnkownMode\r | |
103 | jmp Hang\r | |
104 | KnownMode1:\r | |
105 | ; target (es:di) set on input\r | |
106 | push cs\r | |
107 | pop ds\r | |
108 | mov si, VbeModeInfo\r | |
109 | ; source (ds:si) set now\r | |
110 | \r | |
111 | mov cx, 256\r | |
112 | cld\r | |
113 | rep movsb\r | |
114 | \r | |
115 | pop cx\r | |
116 | pop si\r | |
117 | pop ds\r | |
118 | pop di\r | |
119 | pop es\r | |
120 | jmp Success\r | |
121 | \r | |
122 | \r | |
123 | %define ATT_ADDRESS_REGISTER 0x03c0\r | |
124 | %define VBE_DISPI_IOPORT_INDEX 0x01ce\r | |
125 | %define VBE_DISPI_IOPORT_DATA 0x01d0\r | |
126 | \r | |
127 | %define VBE_DISPI_INDEX_XRES 0x1\r | |
128 | %define VBE_DISPI_INDEX_YRES 0x2\r | |
129 | %define VBE_DISPI_INDEX_BPP 0x3\r | |
130 | %define VBE_DISPI_INDEX_ENABLE 0x4\r | |
131 | %define VBE_DISPI_INDEX_BANK 0x5\r | |
132 | %define VBE_DISPI_INDEX_VIRT_WIDTH 0x6\r | |
133 | %define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7\r | |
134 | %define VBE_DISPI_INDEX_X_OFFSET 0x8\r | |
135 | %define VBE_DISPI_INDEX_Y_OFFSET 0x9\r | |
136 | \r | |
137 | %define VBE_DISPI_ENABLED 0x01\r | |
138 | %define VBE_DISPI_LFB_ENABLED 0x40\r | |
139 | \r | |
140 | %macro BochsWrite 2\r | |
141 | push dx\r | |
142 | push ax\r | |
143 | \r | |
144 | mov dx, VBE_DISPI_IOPORT_INDEX\r | |
145 | mov ax, %1\r | |
146 | out dx, ax\r | |
147 | \r | |
148 | mov dx, VBE_DISPI_IOPORT_DATA\r | |
149 | mov ax, %2\r | |
150 | out dx, ax\r | |
151 | \r | |
152 | pop ax\r | |
153 | pop dx\r | |
154 | %endmacro\r | |
155 | \r | |
156 | SetMode:\r | |
157 | push dx\r | |
158 | push ax\r | |
159 | \r | |
160 | DebugLog StrEnterSetMode\r | |
161 | \r | |
162 | cmp bx, 0x40f1\r | |
163 | je KnownMode2\r | |
164 | DebugLog StrUnkownMode\r | |
165 | jmp Hang\r | |
166 | KnownMode2:\r | |
167 | \r | |
168 | ; unblank\r | |
169 | mov dx, ATT_ADDRESS_REGISTER\r | |
170 | mov al, 0x20\r | |
171 | out dx, al\r | |
172 | \r | |
173 | BochsWrite VBE_DISPI_INDEX_ENABLE, 0\r | |
174 | BochsWrite VBE_DISPI_INDEX_BANK, 0\r | |
175 | BochsWrite VBE_DISPI_INDEX_X_OFFSET, 0\r | |
176 | BochsWrite VBE_DISPI_INDEX_Y_OFFSET, 0\r | |
177 | BochsWrite VBE_DISPI_INDEX_BPP, 32\r | |
178 | BochsWrite VBE_DISPI_INDEX_XRES, 1024\r | |
179 | BochsWrite VBE_DISPI_INDEX_VIRT_WIDTH, 1024\r | |
180 | BochsWrite VBE_DISPI_INDEX_YRES, 768\r | |
181 | BochsWrite VBE_DISPI_INDEX_VIRT_HEIGHT, 768\r | |
182 | BochsWrite VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED\r | |
183 | \r | |
184 | pop ax\r | |
185 | pop dx\r | |
186 | jmp Success\r | |
187 | \r | |
188 | \r | |
189 | GetMode:\r | |
190 | DebugLog StrEnterGetMode\r | |
191 | mov bx, 0x40f1\r | |
192 | jmp Success\r | |
193 | \r | |
194 | \r | |
195 | GetPmCapabilities:\r | |
196 | DebugLog StrGetPmCapabilities\r | |
197 | jmp Unsupported\r | |
198 | \r | |
199 | \r | |
200 | ReadEdid:\r | |
201 | DebugLog StrReadEdid\r | |
202 | jmp Unsupported\r | |
203 | \r | |
204 | \r | |
205 | SetModeLegacy:\r | |
206 | DebugLog StrEnterSetModeLegacy\r | |
207 | \r | |
208 | cmp al, 0x03\r | |
209 | je KnownMode3\r | |
210 | cmp al, 0x12\r | |
211 | je KnownMode4\r | |
212 | DebugLog StrUnkownMode\r | |
213 | jmp Hang\r | |
214 | KnownMode3:\r | |
215 | mov al, 0x30\r | |
216 | jmp SetModeLegacyDone\r | |
217 | KnownMode4:\r | |
218 | mov al, 0x20\r | |
219 | SetModeLegacyDone:\r | |
220 | DebugLog StrExitSuccess\r | |
221 | iret\r | |
222 | \r | |
223 | \r | |
224 | Success:\r | |
225 | DebugLog StrExitSuccess\r | |
226 | mov ax, 0x004f\r | |
227 | iret\r | |
228 | \r | |
229 | \r | |
230 | Unsupported:\r | |
231 | DebugLog StrExitUnsupported\r | |
232 | mov ax, 0x014f\r | |
233 | iret\r | |
234 | \r | |
235 | \r | |
236 | %ifdef DEBUG\r | |
237 | PrintStringSi:\r | |
238 | pusha\r | |
239 | push ds ; save original\r | |
240 | push cs\r | |
241 | pop ds\r | |
242 | mov dx, 0x0402\r | |
243 | PrintStringSiLoop:\r | |
244 | lodsb\r | |
245 | cmp al, 0\r | |
246 | je PrintStringSiDone\r | |
247 | out dx, al\r | |
248 | jmp PrintStringSiLoop\r | |
249 | PrintStringSiDone:\r | |
250 | pop ds ; restore original\r | |
251 | popa\r | |
252 | ret\r | |
253 | \r | |
254 | \r | |
255 | StrExitSuccess:\r | |
256 | db 'Exit', 0x0a, 0\r | |
257 | \r | |
258 | StrExitUnsupported:\r | |
259 | db 'Unsupported', 0x0a, 0\r | |
260 | \r | |
261 | StrUnkownFunction:\r | |
262 | db 'Unknown Function', 0x0a, 0\r | |
263 | \r | |
264 | StrEnterGetInfo:\r | |
265 | db 'GetInfo', 0x0a, 0\r | |
266 | \r | |
267 | StrEnterGetModeInfo:\r | |
268 | db 'GetModeInfo', 0x0a, 0\r | |
269 | \r | |
270 | StrEnterGetMode:\r | |
271 | db 'GetMode', 0x0a, 0\r | |
272 | \r | |
273 | StrEnterSetMode:\r | |
274 | db 'SetMode', 0x0a, 0\r | |
275 | \r | |
276 | StrEnterSetModeLegacy:\r | |
277 | db 'SetModeLegacy', 0x0a, 0\r | |
278 | \r | |
279 | StrUnkownMode:\r | |
280 | db 'Unkown Mode', 0x0a, 0\r | |
281 | \r | |
282 | StrGetPmCapabilities:\r | |
283 | db 'GetPmCapabilities', 0x0a, 0\r | |
284 | \r | |
285 | StrReadEdid:\r | |
286 | db 'ReadEdid', 0x0a, 0\r | |
287 | %endif\r |