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source: vbox/trunk/src/VBox/ValidationKit/bootsectors/bootsector2-cpu-a20-1-template.mac@ 93115

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1; $Id: bootsector2-cpu-a20-1-template.mac 93115 2022-01-01 11:31:46Z vboxsync $
2;; @file
3; bootsector2 A20 - multi mode template.
4;
5
6;
7; Copyright (C) 2007-2022 Oracle Corporation
8;
9; This file is part of VirtualBox Open Source Edition (OSE), as
10; available from http://www.virtualbox.org. This file is free software;
11; you can redistribute it and/or modify it under the terms of the GNU
12; General Public License (GPL) as published by the Free Software
13; Foundation, in version 2 as it comes in the "COPYING" file of the
14; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16;
17; The contents of this file may alternatively be used under the terms
18; of the Common Development and Distribution License Version 1.0
19; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20; VirtualBox OSE distribution, in which case the provisions of the
21; CDDL are applicable instead of those of the GPL.
22;
23; You may elect to license modified versions of this file under the
24; terms and conditions of either the GPL or the CDDL or both.
25;
26
27
28%include "bootsector2-template-header.mac"
29
30
31;;
32; Inner loop dealing with one 64KB segment.
33;
34BEGINPROC TMPL_NM(TestA20_EnabledInner)
35.inner_loop:
36 mov ah, [es:xDI]
37 mov al, [ds:xSI]
38 cmp al, ah
39 jne .inner_next
40
41 not al
42 mov [es:xDI], al
43 cmp al, [ds:xSI]
44 mov [es:xDI], ah
45 je .failed
46
47.inner_next:
48 inc xDI
49 inc xSI
50 dec ecx
51 jnz .inner_loop
52
53 clc
54 ret
55
56.failed:
57 push sBX
58 push sAX
59 push sSI
60 push sDI
61%ifdef TMPL_16BIT
62 push cs
63%endif
64 push .s_szModifiyError
65 call TMPL_NM_CMN(TestFailedF)
66 add xSP, sCB * 5
67 stc
68 ret
69.s_szModifiyError:
70 db TMPL_MODE_STR, '- Same memory; EDI=%RX32 ESI=%RX32 EAX=%RX32 EBX=%RX32', 13, 10, 0
71ENDPROC TMPL_NM(TestA20_EnabledInner)
72
73
74;;
75; Inner loop dealing with one 64KB segment.
76;
77BEGINPROC TMPL_NM(TestA20_DisabledInner)
78.inner_loop:
79 mov ah, [es:xDI]
80 mov al, [ds:xSI]
81 cmp al, ah
82 jne .failed1
83
84 not al
85 mov [es:xDI], al
86 cmp al, [ds:xSI]
87 mov [es:xDI], ah
88 jne .failed2
89
90 inc xDI
91 inc xSI
92 dec ecx
93 jnz .inner_loop
94
95 clc
96 ret
97
98.failed1:
99 push sCX
100 push sBX
101 push sAX
102 push sSI
103 push sDI
104%ifdef TMPL_16BIT
105 push cs
106%endif
107 push .s_szNotEqual
108 call TMPL_NM_CMN(TestFailedF)
109 add xSP, sCB * 6
110 stc
111 ret
112.s_szNotEqual:
113 db TMPL_MODE_STR, ' - Not equal; EDI=%RX32 ESI=%RX32 EAX=%RX32 EBX=%RX32 ECX=%RX32', 13, 10, 0
114
115.failed2:
116 push sCX
117 push sBX
118 push sAX
119 push sSI
120 push sDI
121%ifdef TMPL_16BIT
122 push cs
123%endif
124 push .s_szModifiyError
125 call TMPL_NM_CMN(TestFailedF)
126 add xSP, sCB * 6
127 stc
128 ret
129
130.s_szModifiyError:
131 db TMPL_MODE_STR, ' - Modify error; EDI=%RX32 ESI=%RX32 EAX=%RX32 EBX=%RX32 ECX=%RX32', 13, 10, 0
132ENDPROC TMPL_NM(TestA20_DisabledInner)
133
134
135;;
136; Scans memory calling sDX for each segment.
137;
138BEGINPROC TMPL_NM(TestA20_ScanMemory)
139 push sAX
140 push sBX
141 push sCX
142 push sDX
143 push sSI
144 push sDI
145 pushf
146 cli
147%ifdef TMPL_16BIT
148 push es
149 push ds
150%endif
151
152 ;
153 ; The outer loop walks a segment (64 KB) at a time.
154 ;
155 mov ebx, _1M
156.outer_loop:
157
158 ; Set up the registers.
159%ifdef TMPL_CMN_R86
160 mov ax, 0ffffh
161 mov edi, 00010h
162 mov es, ax
163 mov ax, 00000h
164 mov esi, 00000h
165 mov ds, ax
166 mov ecx, 01000h ; at 101000 there was a VMMDevTesting MMIO page.
167%elifdef TMPL_16BIT
168 ;; @todo need a selector we can modify.
169 jmp .done
170
171%else
172 mov edi, ebx
173 mov esi, ebx
174 and esi, ~_1M
175 mov ecx, _64K
176%endif
177%ifndef TMPL_CMN_R86
178 ; Should we skip this segment or only check parts of it?
179 cmp esi, edi ; affected by A20?
180 je .outer_next
181
182%if BS2_PXX_LAST != 09ffffh
183 %error BS2_PXX_LAST does not have the expected value.
184%endif
185 cmp ebx, BS2_PXX_BASE + _1M ; don't mess with page tables, stacks, MMIO or ROMs.
186 jb .not_low_rom_mmio_region
187 cmp ebx, _1M + _1M
188 jb .outer_next
189.not_low_rom_mmio_region:
190
191 cmp ebx, BS2_ADDR + _1M
192 ja .not_bs2
193 mov ecx, BS2_ADDR ; don't overwrite our own code.
194.not_bs2:
195 cmp ebx, _1M
196 jne .not_VMMDevTestingMMIO
197 mov ecx, 1000h ; don't bother with the MMIO
198.not_VMMDevTestingMMIO:
199%endif ; TMPL_CMN_R86
200
201 ; Invoke the callback.
202 call xDX
203 jc .failure
204
205%ifndef TMPL_CMN_R86
206.outer_next:
207 add ebx, _64K
208 cmp ebx, 32*_1M
209 jbe .outer_loop
210%endif
211
212.done:
213%ifdef TMPL_16BIT
214 pop ds
215 pop es
216%endif
217 popf
218 pop sDI
219 pop sSI
220 pop sDX
221 pop sCX
222 pop sBX
223 pop sAX
224 ret
225
226.failure:
227%if 1
228 cmp ebx, _1M
229 je .contine_at_next_MB
230 cmp ebx, _2M
231 je .contine_at_next_MB
232 cmp ebx, _1M + _2M
233 je .contine_at_next_MB
234 cmp ebx, _4M
235 je .contine_at_next_MB
236%endif
237 jmp .done
238
239.contine_at_next_MB:
240 add ebx, _1M
241 jmp .outer_loop
242ENDPROC TMPL_NM(TestA20_ScanMemory)
243
244
245BEGINPROC TMPL_NM(TestA20_Enabled)
246 push sDX
247 mov xDX, TMPL_NM(TestA20_EnabledInner)
248 call TMPL_NM(TestA20_ScanMemory)
249 pop sDX
250 ret
251ENDPROC TMPL_NM(TestA20_Enabled)
252
253
254;;
255; Checks that the first 64KB at 1MB wraps is the same physical memory as at
256; address 0.
257;
258BEGINPROC TMPL_NM(TestA20_Disabled)
259 push sDX
260 mov xDX, TMPL_NM(TestA20_DisabledInner)
261 call TMPL_NM(TestA20_ScanMemory)
262 pop sDX
263 ret
264ENDPROC TMPL_NM(TestA20_Disabled)
265
266
267BEGINPROC TMPL_NM(TestA20_FlushAll)
268 push sAX
269 wbinvd
270 mov sAX, cr3
271 mov cr3, sAX
272 wbinvd
273 pop sAX
274 ret
275ENDPROC TMPL_NM(TestA20_FlushAll)
276
277
278
279;;
280; Do the A20 tests for this mode.
281;
282; @uses nothing
283;
284BEGINCODELOW
285BITS 16
286BEGINPROC TMPL_NM(TestA20_rm)
287 push eax
288
289 mov ax, .s_szTestName
290 call TestSub_r86
291
292 call TMPL_NM(Bs2IsModeSupported_rm)
293 jz .skip_not_supported
294
295 ;
296 ; Do tests with A20 enabled.
297 ;
298 call Bs2EnableA20_r86
299 call TMPL_NM(Bs2EnterMode_rm)
300BITS TMPL_BITS
301 call TMPL_NM(TestA20_FlushAll)
302 call TMPL_NM(TestA20_Enabled)
303 call TMPL_NM(Bs2ExitMode)
304BITS 16
305 call TestSubErrorCount_r86
306 cmp ax, 0
307 jne .done
308
309 ;
310 ; Do tests with A20 disabled.
311 ;
312 call Bs2DisableA20_r86
313 call TMPL_NM(Bs2EnterMode_rm)
314BITS TMPL_BITS
315 call TMPL_NM(TestA20_FlushAll)
316 call TMPL_NM(TestA20_Disabled)
317 call TMPL_NM(Bs2ExitMode)
318BITS 16
319 call TestSubErrorCount_r86
320 cmp ax, 0
321 jne .done
322
323%ifndef TMPL_CMN_V86
324 ;
325 ; Change A20 state without leaving and entering the CPU mode.
326 ;
327 call Bs2EnableA20_r86
328 call TMPL_NM(Bs2EnterMode_rm)
329BITS TMPL_BITS
330 call TMPL_NM(TestA20_Enabled)
331
332 call TMPL_NM_CMN(Bs2DisableA20)
333 call TMPL_NM(TestA20_FlushAll)
334 call TMPL_NM(TestA20_Disabled)
335
336 call TMPL_NM_CMN(Bs2EnableA20)
337 call TMPL_NM(TestA20_FlushAll)
338 call TMPL_NM(TestA20_Enabled)
339
340 call TMPL_NM_CMN(Bs2DisableA20)
341 call TMPL_NM(TestA20_FlushAll)
342 call TMPL_NM(TestA20_Disabled)
343
344 call TMPL_NM_CMN(Bs2EnableA20)
345 call TMPL_NM(TestA20_FlushAll)
346 call TMPL_NM(TestA20_Enabled)
347
348 call TMPL_NM(Bs2ExitMode)
349BITS 16
350%endif ; !TMPL_CMN_V86
351
352.done:
353 call Bs2DisableA20_r86
354.done1:
355 call TestSubDone_r86
356
357 pop eax
358 ret
359
360.skip_not_supported:
361 mov eax, .s_szSkipNotSupported
362 call TestSkipped_r86
363 jmp .done1
364
365.s_szTestName:
366 db TMPL_MODE_STR, 0
367.s_szSkipNotSupported:
368 db TMPL_MODE_STR, ' is not supported by the CPU', 10, 13, 0
369ENDPROC TMPL_NM(TestA20_rm)
370TMPL_BEGINCODE
371BITS TMPL_BITS
372
373
374%include "bootsector2-template-footer.mac"
375
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