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|
; $Id: bootsector2-common-routines-template-2.mac $
;; @file
; bootsector2 common routines - template containing code specific to each mode.
;
;
; Copyright (C) 2007-2023 Oracle and/or its affiliates.
;
; This file is part of VirtualBox base platform packages, as
; available from https://www.virtualbox.org.
;
; This program is free software; you can redistribute it and/or
; modify it under the terms of the GNU General Public License
; as published by the Free Software Foundation, in version 3 of the
; License.
;
; This program is distributed in the hope that it will be useful, but
; WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
; General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program; if not, see <https://www.gnu.org/licenses>.
;
; The contents of this file may alternatively be used under the terms
; of the Common Development and Distribution License Version 1.0
; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
; in the VirtualBox distribution, in which case the provisions of the
; CDDL are applicable instead of those of the GPL.
;
; You may elect to license modified versions of this file under the
; terms and conditions of either the GPL or the CDDL or both.
;
; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
;
%include "bootsector2-template-header.mac"
ALIGNCODE(32)
GLOBALNAME TMPL_NM(g_szMode)
db TMPL_MODE_STR, 0
;;
; Prints a string on the screen.
;
; @param ds:ax The string to print (null terminated).
;
; @uses nothing
;
BEGINPROC TMPL_NM(PrintStr)
push xBP
mov xBP, xSP
push xAX
push xBX
push xSI
mov xSI, xAX
.next:
lodsb
test al, al
jz .done
%ifdef TMPL_HAVE_BIOS
mov bx, 0ff00h
mov ah, 0eh
int 10h
%else
call TMPL_NM(PrintChr)
%endif
jmp .next
.done:
pop xSI
pop xBX
pop xAX
leave
ret
ENDPROC TMPL_NM(PrintStr)
;;
; Prints a string on the screen.
;
; @param al The character to print.
;
; @uses nothing
;
BEGINCODELOW
BEGINPROC TMPL_NM(PrintChr)
push xBP
mov xBP, xSP
push xAX
push xBX
%ifndef TMPL_HAVE_BIOS
%ifdef BS2_WITH_TRAPS
mov bx, cs
and xBX, 0x3
push xBX
jz .ring_ok
call TMPL_NM_CMN(Bs2ToRing0)
.ring_ok:
%endif
mov bl, al
call TMPL_NM(LeaveCpuMode)
mov al, bl
BITS 16
%endif
mov bx, 0ff00h
mov ah, 0eh
int 10h
%ifndef TMPL_HAVE_BIOS
call TMPL_NM(EnterCpuMode)
BITS TMPL_BITS
%ifdef BS2_WITH_TRAPS
pop xAX
test al, al
jz .ring_restored
call TMPL_NM_CMN(Bs2ToRingN)
.ring_restored:
%endif
%endif
pop xBX
pop xAX
leave
ret
ENDPROC TMPL_NM(PrintChr)
TMPL_BEGINCODE
%ifndef TMPL_HAVE_BIOS
;;
; Leaves the current CPU mode and returns to real mode.
;
; @uses nothing
;
BEGINPROC TMPL_NM(LeaveCpuMode)
jmp TMPL_NM(Bs2ExitMode)
ENDPROC TMPL_NM(LeaveCpuMode)
;;
; Undo what LeaveCpuMode did.
;
; @uses nothing
;
BEGINCODELOW
BITS 16
BEGINPROC TMPL_NM(EnterCpuMode)
jmp TMPL_NM(Bs2EnterMode_rm)
ENDPROC TMPL_NM(EnterCpuMode)
TMPL_BEGINCODE
BITS TMPL_BITS
%endif ; TMPL_HAVE_BIOS
;;
; Sets the global variable for the current CPU mode.
;
; @uses nothing.
;
BEGINPROC TMPL_NM(SetCpuModeGlobals)
%ifdef TMPL_CMN_PE
%ifdef BS2_INC_PE16
mov word [g_pfnPrintStrInternal_p16], PrintStr_pe16
mov word [g_pfnPrintChrInternal_p16], PrintChr_pe16
%endif
%ifdef BS2_INC_PE32
mov dword [g_pfnPrintStrInternal_p32], PrintStr_pe32
mov dword [g_pfnPrintChrInternal_p32], PrintChr_pe32
%endif
%elifdef TMPL_CMN_PP
%ifdef BS2_INC_PP16
mov word [g_pfnPrintStrInternal_p16], PrintStr_pp16
mov word [g_pfnPrintChrInternal_p16], PrintChr_pp16
%endif
%ifdef BS2_INC_PP32
mov dword [g_pfnPrintStrInternal_p32], PrintStr_pp32
mov dword [g_pfnPrintChrInternal_p32], PrintChr_pp32
%endif
%elifdef TMPL_CMN_PAE
%ifdef BS2_INC_PAE16
mov word [g_pfnPrintStrInternal_p16], PrintStr_pae16
mov word [g_pfnPrintChrInternal_p16], PrintChr_pae16
%endif
%ifdef BS2_INC_PAE32
mov dword [g_pfnPrintStrInternal_p32], PrintStr_pae32
mov dword [g_pfnPrintChrInternal_p32], PrintChr_pae32
%endif
%elifdef TMPL_CMN_LM
%ifdef BS2_INC_LM16
mov word [g_pfnPrintStrInternal_p16], PrintStr_lm16
mov word [g_pfnPrintChrInternal_p16], PrintChr_lm16
%endif
%ifdef BS2_INC_LM32
mov dword [g_pfnPrintStrInternal_p32], PrintStr_lm32
mov dword [g_pfnPrintChrInternal_p32], PrintChr_lm32
%endif
%ifdef BS2_INC_LM64
mov dword [g_pfnPrintStrInternal_p64], PrintStr_lm64
mov dword [g_pfnPrintChrInternal_p64], PrintChr_lm64
%endif
%elifdef TMPL_16BIT
mov word [TMPL_NM_CMN(g_pfnPrintStrInternal)], TMPL_NM(PrintStr)
mov word [TMPL_NM_CMN(g_pfnPrintChrInternal)], TMPL_NM(PrintChr)
%else
%error "missing case"
%endif
ret
ENDPROC TMPL_NM(SetCpuModeGlobals)
%include "bootsector2-template-footer.mac"
|
