; $Id: bootsector2-common-routines-template-2.mac 82968 2020-02-04 10:35:17Z vboxsync $ ;; @file ; bootsector2 common routines - template containing code specific to each mode. ; ; ; Copyright (C) 2007-2020 Oracle Corporation ; ; This file is part of VirtualBox Open Source Edition (OSE), as ; available from http://www.virtualbox.org. This file is free software; ; you can redistribute it and/or modify it under the terms of the GNU ; General Public License (GPL) as published by the Free Software ; Foundation, in version 2 as it comes in the "COPYING" file of the ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. ; ; The contents of this file may alternatively be used under the terms ; of the Common Development and Distribution License Version 1.0 ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the ; VirtualBox OSE 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. ; %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"