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

; $Id: bootsector2-common-routines-template-2.mac 98103 2023-01-17 14:15:46Z vboxsync $
;; @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"