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Diffstat (limited to '')
| -rw-r--r-- | src/VBox/Devices/PC/BIOS/bios.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/src/VBox/Devices/PC/BIOS/bios.c b/src/VBox/Devices/PC/BIOS/bios.c new file mode 100644 index 00000000..5d6c748b --- /dev/null +++ b/src/VBox/Devices/PC/BIOS/bios.c @@ -0,0 +1,212 @@ +/* $Id: bios.c $ */ +/** @file + * PC BIOS - ??? + */ + +/* + * Copyright (C) 2006-2023 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>. + * + * SPDX-License-Identifier: GPL-3.0-only + * -------------------------------------------------------------------- + * + * This code is based on: + * + * ROM BIOS for use with Bochs/Plex86/QEMU emulation environment + * + * Copyright (C) 2002 MandrakeSoft S.A. + * + * MandrakeSoft S.A. + * 43, rue d'Aboukir + * 75002 Paris - France + * http://www.linux-mandrake.com/ + * http://www.mandrakesoft.com/ + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +/* + * Oracle LGPL Disclaimer: For the avoidance of doubt, except that if any license choice + * other than GPL or LGPL is available it will apply instead, Oracle elects to use only + * the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where + * a choice of LGPL license versions is made available with the language indicating + * that LGPLv2 or any later version may be used, or where a choice of which version + * of the LGPL is applied is otherwise unspecified. + */ + + +#include <stdint.h> +#include "inlines.h" +#include "biosint.h" +#include "VBox/bios.h" +#ifndef VBOX_VERSION_STRING +#include <VBox/version.h> +#endif + +static const char bios_cvs_version_string[] = "VirtualBox " VBOX_VERSION_STRING; + +uint8_t inb_cmos(uint8_t cmos_reg) +{ + uint8_t cmos_port = 0x70; + + if (cmos_reg >= 0x80) + cmos_port += 2; + outb(cmos_port, cmos_reg); + return inb(cmos_port + 1); +} + +void outb_cmos(uint8_t cmos_reg, uint8_t val) +{ + uint8_t cmos_port = 0x70; + + if (cmos_reg >= 0x80) + cmos_port += 2; + outb(cmos_port, cmos_reg); + outb(cmos_port + 1, val); +} + +/** + * Reads two adjacent cmos bytes and return their values as a 16-bit word. + */ +uint16_t get_cmos_word(uint8_t idxFirst) +{ + return ((uint16_t)inb_cmos(idxFirst + 1) << 8) + | inb_cmos(idxFirst); +} + +void BIOSCALL dummy_isr_function(pusha_regs_t regs, uint16_t es, + uint16_t ds, iret_addr_t iret_addr) +{ + // Interrupt handler for unexpected hardware interrupts. We have to clear + // the PIC because if we don't, the next EOI will clear the wrong interrupt + // and all hell will break loose! This routine also masks the unexpected + // interrupt so it will generally be called only once for each unexpected + // interrupt level. + uint8_t isrA, isrB, imr, last_int = 0xFF; + + outb(PIC_MASTER, PIC_CMD_RD_ISR); // Read master ISR + isrA = inb(PIC_MASTER); + if (isrA) { + outb(PIC_SLAVE, PIC_CMD_RD_ISR); // Read slave ISR + isrB = inb(PIC_SLAVE); + if (isrB) { + imr = inb(PIC_SLAVE_MASK); + outb(PIC_SLAVE_MASK, imr | isrB ); // Mask this interrupt + outb(PIC_SLAVE, PIC_CMD_EOI); // Send EOI on slave PIC + } else { + imr = inb(PIC_MASTER_MASK); + isrA &= 0xFB; // Never mask the cascade interrupt + outb(PIC_MASTER_MASK, imr | isrA); // Mask this interrupt + } + outb(PIC_MASTER, PIC_CMD_EOI); // Send EOI on master PIC + last_int = isrA; + } + write_byte(0x40, 0x6B, last_int); // Write INTR_FLAG +} + + +void BIOSCALL nmi_handler_msg(void) +{ + BX_PANIC("NMI Handler called\n"); +} + +void BIOSCALL int18_panic_msg(void) +{ + BX_INFO("INT18: BOOT FAILURE\n"); + out_ctrl_str_asm(VBOX_BIOS_SHUTDOWN_PORT, "Bootfail"); +} + +void BIOSCALL log_bios_start(void) +{ +#if BX_DEBUG_SERIAL + outb(BX_DEBUG_PORT+UART_LCR, 0x03); /* setup for serial logging: 8N1 */ +#endif + BX_INFO("%s\n", bios_cvs_version_string); +} + +/* Set video mode. */ +void set_mode(uint8_t mode); +#pragma aux set_mode = \ + "mov ah, 0" \ + "int 10h" \ + parm [al] modify [ax]; + +/// @todo restore +//#undef VBOX + +#define BX_PCIBIOS 1 +#define BX_APPNAME "VirtualBox" +#define BIOS_BUILD_DATE __DATE__ +//-------------------------------------------------------------------------- +// print_bios_banner +// displays a the bios version +//-------------------------------------------------------------------------- +void BIOSCALL print_bios_banner(void) +{ +#ifdef VBOX + // Skip the logo if a warm boot is requested. + uint16_t warm_boot = read_word(0x0040,0x0072); + write_word(0x0040,0x0072, 0); + if (warm_boot == 0x1234) + { + /* Only set text mode. */ + set_mode(3); + return; + } + /* show graphical logo */ + show_logo(); +#else /* !VBOX */ + char *bios_conf; + + /* Avoid using preprocessing directives within macro arguments. */ + bios_conf = +#ifdef __WATCOMC__ + "watcom " +#endif +#if BX_APM + "apmbios " +#endif +#if BX_PCIBIOS + "pcibios " +#endif +#if BX_ELTORITO_BOOT + "eltorito " +#endif +#if BX_ROMBIOS32 + "rombios32 " +#endif + "\n\n"; + + printf(BX_APPNAME" BIOS - build: %s\n%s\nOptions: ", + BIOS_BUILD_DATE, bios_cvs_version_string); + printf(bios_conf, 0); +#endif /* VBOX */ +} |