VirtualBox

source: vbox/trunk/src/VBox/ValidationKit/bootsectors/bootsector2-common-routines-template-2.mac@ 103131

Last change on this file since 103131 was 98103, checked in by vboxsync, 21 months ago

Copyright year updates by scm.

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1; $Id: bootsector2-common-routines-template-2.mac 98103 2023-01-17 14:15:46Z vboxsync $
2;; @file
3; bootsector2 common routines - template containing code specific to each mode.
4;
5
6;
7; Copyright (C) 2007-2023 Oracle and/or its affiliates.
8;
9; This file is part of VirtualBox base platform packages, as
10; available from https://www.virtualbox.org.
11;
12; This program is free software; you can redistribute it and/or
13; modify it under the terms of the GNU General Public License
14; as published by the Free Software Foundation, in version 3 of the
15; License.
16;
17; This program is distributed in the hope that it will be useful, but
18; WITHOUT ANY WARRANTY; without even the implied warranty of
19; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20; General Public License for more details.
21;
22; You should have received a copy of the GNU General Public License
23; along with this program; if not, see <https://www.gnu.org/licenses>.
24;
25; The contents of this file may alternatively be used under the terms
26; of the Common Development and Distribution License Version 1.0
27; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28; in the VirtualBox distribution, in which case the provisions of the
29; CDDL are applicable instead of those of the GPL.
30;
31; You may elect to license modified versions of this file under the
32; terms and conditions of either the GPL or the CDDL or both.
33;
34; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35;
36
37%include "bootsector2-template-header.mac"
38ALIGNCODE(32)
39GLOBALNAME TMPL_NM(g_szMode)
40 db TMPL_MODE_STR, 0
41
42
43;;
44; Prints a string on the screen.
45;
46; @param ds:ax The string to print (null terminated).
47;
48; @uses nothing
49;
50BEGINPROC TMPL_NM(PrintStr)
51 push xBP
52 mov xBP, xSP
53 push xAX
54 push xBX
55 push xSI
56
57 mov xSI, xAX
58.next:
59 lodsb
60 test al, al
61 jz .done
62%ifdef TMPL_HAVE_BIOS
63 mov bx, 0ff00h
64 mov ah, 0eh
65 int 10h
66%else
67 call TMPL_NM(PrintChr)
68%endif
69 jmp .next
70
71.done:
72 pop xSI
73 pop xBX
74 pop xAX
75 leave
76 ret
77ENDPROC TMPL_NM(PrintStr)
78
79
80;;
81; Prints a string on the screen.
82;
83; @param al The character to print.
84;
85; @uses nothing
86;
87BEGINCODELOW
88BEGINPROC TMPL_NM(PrintChr)
89 push xBP
90 mov xBP, xSP
91 push xAX
92 push xBX
93
94%ifndef TMPL_HAVE_BIOS
95 %ifdef BS2_WITH_TRAPS
96 mov bx, cs
97 and xBX, 0x3
98 push xBX
99 jz .ring_ok
100 call TMPL_NM_CMN(Bs2ToRing0)
101.ring_ok:
102 %endif
103
104 mov bl, al
105 call TMPL_NM(LeaveCpuMode)
106 mov al, bl
107BITS 16
108%endif
109
110 mov bx, 0ff00h
111 mov ah, 0eh
112 int 10h
113
114%ifndef TMPL_HAVE_BIOS
115 call TMPL_NM(EnterCpuMode)
116BITS TMPL_BITS
117 %ifdef BS2_WITH_TRAPS
118 pop xAX
119 test al, al
120 jz .ring_restored
121 call TMPL_NM_CMN(Bs2ToRingN)
122.ring_restored:
123 %endif
124%endif
125
126 pop xBX
127 pop xAX
128 leave
129 ret
130ENDPROC TMPL_NM(PrintChr)
131TMPL_BEGINCODE
132
133
134%ifndef TMPL_HAVE_BIOS
135
136;;
137; Leaves the current CPU mode and returns to real mode.
138;
139; @uses nothing
140;
141BEGINPROC TMPL_NM(LeaveCpuMode)
142 jmp TMPL_NM(Bs2ExitMode)
143ENDPROC TMPL_NM(LeaveCpuMode)
144
145
146;;
147; Undo what LeaveCpuMode did.
148;
149; @uses nothing
150;
151BEGINCODELOW
152BITS 16
153BEGINPROC TMPL_NM(EnterCpuMode)
154 jmp TMPL_NM(Bs2EnterMode_rm)
155ENDPROC TMPL_NM(EnterCpuMode)
156TMPL_BEGINCODE
157BITS TMPL_BITS
158
159%endif ; TMPL_HAVE_BIOS
160
161
162;;
163; Sets the global variable for the current CPU mode.
164;
165; @uses nothing.
166;
167BEGINPROC TMPL_NM(SetCpuModeGlobals)
168%ifdef TMPL_CMN_PE
169 %ifdef BS2_INC_PE16
170 mov word [g_pfnPrintStrInternal_p16], PrintStr_pe16
171 mov word [g_pfnPrintChrInternal_p16], PrintChr_pe16
172 %endif
173 %ifdef BS2_INC_PE32
174 mov dword [g_pfnPrintStrInternal_p32], PrintStr_pe32
175 mov dword [g_pfnPrintChrInternal_p32], PrintChr_pe32
176 %endif
177
178%elifdef TMPL_CMN_PP
179 %ifdef BS2_INC_PP16
180 mov word [g_pfnPrintStrInternal_p16], PrintStr_pp16
181 mov word [g_pfnPrintChrInternal_p16], PrintChr_pp16
182 %endif
183 %ifdef BS2_INC_PP32
184 mov dword [g_pfnPrintStrInternal_p32], PrintStr_pp32
185 mov dword [g_pfnPrintChrInternal_p32], PrintChr_pp32
186 %endif
187
188%elifdef TMPL_CMN_PAE
189 %ifdef BS2_INC_PAE16
190 mov word [g_pfnPrintStrInternal_p16], PrintStr_pae16
191 mov word [g_pfnPrintChrInternal_p16], PrintChr_pae16
192 %endif
193 %ifdef BS2_INC_PAE32
194 mov dword [g_pfnPrintStrInternal_p32], PrintStr_pae32
195 mov dword [g_pfnPrintChrInternal_p32], PrintChr_pae32
196 %endif
197
198%elifdef TMPL_CMN_LM
199 %ifdef BS2_INC_LM16
200 mov word [g_pfnPrintStrInternal_p16], PrintStr_lm16
201 mov word [g_pfnPrintChrInternal_p16], PrintChr_lm16
202 %endif
203 %ifdef BS2_INC_LM32
204 mov dword [g_pfnPrintStrInternal_p32], PrintStr_lm32
205 mov dword [g_pfnPrintChrInternal_p32], PrintChr_lm32
206 %endif
207 %ifdef BS2_INC_LM64
208 mov dword [g_pfnPrintStrInternal_p64], PrintStr_lm64
209 mov dword [g_pfnPrintChrInternal_p64], PrintChr_lm64
210 %endif
211
212%elifdef TMPL_16BIT
213 mov word [TMPL_NM_CMN(g_pfnPrintStrInternal)], TMPL_NM(PrintStr)
214 mov word [TMPL_NM_CMN(g_pfnPrintChrInternal)], TMPL_NM(PrintChr)
215%else
216 %error "missing case"
217%endif
218 ret
219ENDPROC TMPL_NM(SetCpuModeGlobals)
220
221
222
223%include "bootsector2-template-footer.mac"
224
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