VirtualBox

source: vbox/trunk/src/VBox/Devices/EFI/FirmwareNew/OvmfPkg/Bhyve/BhyveRfbDxe/VbeShim.asm@ 105668

Last change on this file since 105668 was 89983, checked in by vboxsync, 4 years ago

Devices/EFI: Merge edk-stable202105 and openssl 1.1.1j and make it build, bugref:4643
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/x-asm
File size: 6.5 KB
Line 
1;------------------------------------------------------------------------------
2; @file
3; A minimal Int10h stub that allows the Windows 2008 R2 SP1 UEFI guest's buggy,
4; default VGA driver to switch to 1024x768x32.
5;
6; Copyright (C) 2020, Rebecca Cran <rebecca@bsdio.com>
7; Copyright (C) 2015, Nahanni Systems, Inc.
8; Copyright (C) 2014, Red Hat, Inc.
9; Copyright (c) 2013 - 2014, Intel Corporation. All rights reserved.<BR>
10;
11; SPDX-License-Identifier: BSD-2-Clause-Patent
12;
13;------------------------------------------------------------------------------
14
15; enable this macro for debug messages
16%define DEBUG
17
18%macro DebugLog 1
19%ifdef DEBUG
20 push si
21 mov si, %1
22 call PrintStringSi
23 pop si
24%endif
25%endmacro
26
27
28BITS 16
29ORG 0
30
31VbeInfo:
32TIMES 256 nop
33
34VbeModeInfo:
35VbeMode1:
36TIMES 50 nop
37VbeMode2:
38TIMES 50 nop
39VbeMode3:
40TIMES 50 nop
41VbeMode4:
42TIMES 50 nop
43TIMES 56 nop ; filler for 256 bytes
44
45Handler:
46 cmp ax, 0x4f00
47 je GetInfo
48 cmp ax, 0x4f01
49 je GetModeInfo
50 cmp ax, 0x4f02
51 je SetMode
52 cmp ax, 0x4f03
53 je GetMode
54 cmp ax, 0x4f10
55 je GetPmCapabilities
56 cmp ax, 0x4f15
57 je ReadEdid
58 cmp ah, 0x00
59 je SetModeLegacy
60 DebugLog StrUnkownFunction
61Hang:
62 jmp Hang
63
64
65GetInfo:
66 push es
67 push di
68 push ds
69 push si
70 push cx
71
72 DebugLog StrEnterGetInfo
73
74 ; target (es:di) set on input
75 push cs
76 pop ds
77 mov si, VbeInfo
78 ; source (ds:si) set now
79
80 mov cx, 256
81 cld
82 rep movsb
83
84 pop cx
85 pop si
86 pop ds
87 pop di
88 pop es
89 jmp Success
90
91
92GetModeInfo:
93 push es
94 push di
95 push ds
96 push si
97 push cx
98
99 DebugLog StrEnterGetModeInfo
100
101 and cx, ~0x4000 ; clear potentially set LFB bit in mode number
102
103 cmp cx, 0x013f
104 je gKnownMode1
105 cmp cx, 0x0140
106 je gKnownMode2
107 cmp cx, 0x0141
108 je gKnownMode3
109
110 DebugLog StrUnkownMode
111 jmp Hang
112gKnownMode1:
113 DebugLog StrMode1
114 mov si, VbeMode1
115 jmp CopyModeInfo
116gKnownMode2:
117 DebugLog StrMode2
118 mov si, VbeMode2
119 jmp CopyModeInfo
120gKnownMode3:
121 DebugLog StrMode3
122 mov si, VbeMode3
123 jmp CopyModeInfo
124gKnownMode4:
125 DebugLog StrMode4
126 mov si, VbeMode4
127 jmp CopyModeInfo
128
129CopyModeInfo:
130 ; target (es:di) set on input
131 push cs
132 pop ds
133 ;mov si, VbeModeInfo
134 ; source (ds:si) set now
135
136 ;mov cx, 256
137 mov cx, 50
138 cld
139 rep movsb
140
141 pop cx
142 pop si
143 pop ds
144 pop di
145 pop es
146 jmp Success
147
148
149SetMode:
150 push dx
151 push ax
152
153 DebugLog StrEnterSetMode
154
155 and bx, ~0x4000 ; clear potentially set LFB bit in mode number
156 cmp bx, 0x013f
157 je KnownMode1
158 cmp bx, 0x0140
159 je KnownMode2
160 cmp bx, 0x0141
161 je KnownMode3
162 DebugLog StrUnkownMode
163 jmp Hang
164KnownMode1:
165 DebugLog StrMode1
166 jmp SetModeDone
167KnownMode2:
168 DebugLog StrMode2
169 jmp SetModeDone
170KnownMode3:
171 DebugLog StrMode3
172 jmp SetModeDone
173KnownMode4:
174 DebugLog StrMode4
175
176SetModeDone:
177 mov [CurMode], bl
178 mov [CurMode+1], bh
179 pop ax
180 pop dx
181 jmp Success
182
183
184GetMode:
185 DebugLog StrEnterGetMode
186 mov bl, [CurMode]
187 mov bh, [CurMode+1]
188 jmp Success
189
190
191GetPmCapabilities:
192 DebugLog StrGetPmCapabilities
193 mov bx, 0x0080
194 jmp Success
195
196
197ReadEdid:
198 push es
199 push di
200 push ds
201 push si
202 push cx
203
204 DebugLog StrReadEdid
205
206 ; target (es:di) set on input
207 push cs
208 pop ds
209 mov si, Edid
210 ; source (ds:si) set now
211
212 mov cx, 128
213 cld
214 rep movsb
215
216 pop cx
217 pop si
218 pop ds
219 pop di
220 pop es
221 jmp Success
222
223
224SetModeLegacy:
225 DebugLog StrEnterSetModeLegacy
226
227 cmp al, 0x03
228 je sKnownMode3
229 cmp al, 0x12
230 je sKnownMode4
231 DebugLog StrUnkownMode
232 jmp Hang
233sKnownMode3:
234 DebugLog StrLegacyMode3
235 mov al, 0 ; 0x30
236 jmp SetModeLegacyDone
237sKnownMode4:
238 mov al, 0 ;0x20
239SetModeLegacyDone:
240 DebugLog StrExitSuccess
241 iret
242
243
244Success:
245 DebugLog StrExitSuccess
246 mov ax, 0x004f
247 iret
248
249
250Unsupported:
251 DebugLog StrExitUnsupported
252 mov ax, 0x024f
253 iret
254
255
256%ifdef DEBUG
257PrintStringSi:
258 pusha
259 push ds ; save original
260 push cs
261 pop ds
262 mov dx, 0x220 ; bhyve debug cons port
263 mov ax, 0
264PrintStringSiLoop:
265 lodsb
266 cmp al, 0
267 je PrintStringSiDone
268 out dx, al
269 jmp PrintStringSiLoop
270PrintStringSiDone:
271 pop ds ; restore original
272 popa
273 ret
274
275
276StrExitSuccess:
277 db 'vOk', 0x0d, 0x0a, 0
278
279StrExitUnsupported:
280 db 'vUnsupported', 0x0d, 0x0a, 0
281
282StrUnkownFunction:
283 db 'vUnknown Function', 0x0d, 0x0a, 0
284
285StrEnterGetInfo:
286 db 'vGetInfo', 0x0d, 0x0a, 0
287
288StrEnterGetModeInfo:
289 db 'vGetModeInfo', 0x0d, 0x0a, 0
290
291StrEnterGetMode:
292 db 'vGetMode', 0x0d, 0x0a, 0
293
294StrEnterSetMode:
295 db 'vSetMode', 0x0d, 0x0a, 0
296
297StrEnterSetModeLegacy:
298 db 'vSetModeLegacy', 0x0d, 0x0a, 0
299
300StrUnkownMode:
301 db 'vUnkown Mode', 0x0d, 0x0a, 0
302
303StrGetPmCapabilities:
304 db 'vGetPmCapabilities', 0x0d, 0x0a, 0
305
306StrReadEdid:
307 db 'vReadEdid', 0x0d, 0x0a, 0
308
309StrLegacyMode3:
310 db 'vLegacyMode3', 0x0d, 0x0a, 0
311
312
313StrMode1:
314 db 'mode_640x480x32', 0x0d, 0x0a, 0
315StrMode2:
316 db 'mode_800x600x32', 0x0d, 0x0a, 0
317StrMode3:
318 db 'mode_1024x768x32', 0x0d, 0x0a, 0
319StrMode4:
320 db 'mode_unused', 0x0d, 0x0a, 0
321%endif
322
323CurMode:
324 db 0x00, 0x00
325
326;
327; EDID stores monitor information. For now, just send back an null item.
328;
329Edid:
330 db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
331 db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
332 db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
333 db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
334 db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
335 db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
336 db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
337 db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
338 db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
339 db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
340 db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
341 db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
342 db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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