369 lines
10 KiB
C
369 lines
10 KiB
C
/*
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* QEMU PC System Emulator
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*
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* Copyright (c) 2003-2004 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <getopt.h>
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#include <inttypes.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <time.h>
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#include <sys/time.h>
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#include <malloc.h>
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#include <termios.h>
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#include <sys/poll.h>
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#include <errno.h>
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#include <sys/wait.h>
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#include <netinet/in.h>
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#include "cpu.h"
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#include "vl.h"
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#define BIOS_FILENAME "bios.bin"
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#define VGABIOS_FILENAME "vgabios.bin"
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#define LINUX_BOOT_FILENAME "linux_boot.bin"
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#define KERNEL_LOAD_ADDR 0x00100000
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#define INITRD_LOAD_ADDR 0x00400000
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#define KERNEL_PARAMS_ADDR 0x00090000
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#define KERNEL_CMDLINE_ADDR 0x00099000
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int speaker_data_on;
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int dummy_refresh_clock;
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static void ioport80_write(CPUState *env, uint32_t addr, uint32_t data)
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{
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}
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#define REG_EQUIPMENT_BYTE 0x14
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static void cmos_init(int ram_size, int boot_device)
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{
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RTCState *s = &rtc_state;
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int val;
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/* various important CMOS locations needed by PC/Bochs bios */
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s->cmos_data[REG_EQUIPMENT_BYTE] = 0x02; /* FPU is there */
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s->cmos_data[REG_EQUIPMENT_BYTE] |= 0x04; /* PS/2 mouse installed */
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/* memory size */
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val = (ram_size / 1024) - 1024;
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if (val > 65535)
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val = 65535;
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s->cmos_data[0x17] = val;
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s->cmos_data[0x18] = val >> 8;
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s->cmos_data[0x30] = val;
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s->cmos_data[0x31] = val >> 8;
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val = (ram_size / 65536) - ((16 * 1024 * 1024) / 65536);
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if (val > 65535)
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val = 65535;
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s->cmos_data[0x34] = val;
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s->cmos_data[0x35] = val >> 8;
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switch(boot_device) {
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case 'a':
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case 'b':
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s->cmos_data[0x3d] = 0x01; /* floppy boot */
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break;
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default:
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case 'c':
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s->cmos_data[0x3d] = 0x02; /* hard drive boot */
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break;
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case 'd':
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s->cmos_data[0x3d] = 0x03; /* CD-ROM boot */
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break;
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}
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}
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void cmos_register_fd (uint8_t fd0, uint8_t fd1)
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{
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RTCState *s = &rtc_state;
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int nb = 0;
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s->cmos_data[0x10] = 0;
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switch (fd0) {
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case 0:
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/* 1.44 Mb 3"5 drive */
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s->cmos_data[0x10] |= 0x40;
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break;
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case 1:
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/* 2.88 Mb 3"5 drive */
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s->cmos_data[0x10] |= 0x60;
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break;
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case 2:
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/* 1.2 Mb 5"5 drive */
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s->cmos_data[0x10] |= 0x20;
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break;
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}
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switch (fd1) {
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case 0:
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/* 1.44 Mb 3"5 drive */
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s->cmos_data[0x10] |= 0x04;
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break;
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case 1:
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/* 2.88 Mb 3"5 drive */
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s->cmos_data[0x10] |= 0x06;
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break;
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case 2:
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/* 1.2 Mb 5"5 drive */
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s->cmos_data[0x10] |= 0x02;
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break;
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}
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if (fd0 < 3)
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nb++;
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if (fd1 < 3)
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nb++;
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switch (nb) {
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case 0:
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break;
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case 1:
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s->cmos_data[REG_EQUIPMENT_BYTE] |= 0x01; /* 1 drive, ready for boot */
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break;
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case 2:
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s->cmos_data[REG_EQUIPMENT_BYTE] |= 0x41; /* 2 drives, ready for boot */
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break;
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}
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}
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void speaker_ioport_write(CPUState *env, uint32_t addr, uint32_t val)
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{
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speaker_data_on = (val >> 1) & 1;
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pit_set_gate(&pit_channels[2], val & 1);
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}
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uint32_t speaker_ioport_read(CPUState *env, uint32_t addr)
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{
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int out;
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out = pit_get_out(&pit_channels[2]);
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dummy_refresh_clock ^= 1;
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return (speaker_data_on << 1) | pit_channels[2].gate | (out << 5) |
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(dummy_refresh_clock << 4);
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}
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/***********************************************************/
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/* PC floppy disk controler emulation glue */
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#define PC_FDC_DMA 0x2
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#define PC_FDC_IRQ 0x6
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#define PC_FDC_BASE 0x3F0
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static void fdctrl_register (unsigned char **disknames, int ro,
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char boot_device)
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{
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int i;
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fdctrl_init(PC_FDC_IRQ, PC_FDC_DMA, 0, PC_FDC_BASE, boot_device);
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for (i = 0; i < MAX_FD; i++) {
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if (disknames[i] != NULL)
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fdctrl_disk_change(i, disknames[i], ro);
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}
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}
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/***********************************************************/
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/* Bochs BIOS debug ports */
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void bochs_bios_write(CPUX86State *env, uint32_t addr, uint32_t val)
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{
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switch(addr) {
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/* Bochs BIOS messages */
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case 0x400:
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case 0x401:
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fprintf(stderr, "BIOS panic at rombios.c, line %d\n", val);
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exit(1);
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case 0x402:
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case 0x403:
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#ifdef DEBUG_BIOS
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fprintf(stderr, "%c", val);
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#endif
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break;
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/* LGPL'ed VGA BIOS messages */
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case 0x501:
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case 0x502:
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fprintf(stderr, "VGA BIOS panic, line %d\n", val);
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exit(1);
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case 0x500:
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case 0x503:
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#ifdef DEBUG_BIOS
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fprintf(stderr, "%c", val);
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#endif
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break;
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}
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}
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void bochs_bios_init(void)
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{
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register_ioport_write(0x400, 1, bochs_bios_write, 2);
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register_ioport_write(0x401, 1, bochs_bios_write, 2);
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register_ioport_write(0x402, 1, bochs_bios_write, 1);
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register_ioport_write(0x403, 1, bochs_bios_write, 1);
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register_ioport_write(0x501, 1, bochs_bios_write, 2);
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register_ioport_write(0x502, 1, bochs_bios_write, 2);
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register_ioport_write(0x500, 1, bochs_bios_write, 1);
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register_ioport_write(0x503, 1, bochs_bios_write, 1);
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}
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int load_kernel(const char *filename, uint8_t *addr,
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uint8_t *real_addr)
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{
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int fd, size;
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int setup_sects;
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fd = open(filename, O_RDONLY);
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if (fd < 0)
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return -1;
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/* load 16 bit code */
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if (read(fd, real_addr, 512) != 512)
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goto fail;
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setup_sects = real_addr[0x1F1];
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if (!setup_sects)
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setup_sects = 4;
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if (read(fd, real_addr + 512, setup_sects * 512) !=
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setup_sects * 512)
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goto fail;
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/* load 32 bit code */
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size = read(fd, addr, 16 * 1024 * 1024);
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if (size < 0)
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goto fail;
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close(fd);
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return size;
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fail:
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close(fd);
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return -1;
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}
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/* PC hardware initialisation */
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void pc_init(int ram_size, int vga_ram_size, int boot_device,
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DisplayState *ds, const char **fd_filename, int snapshot,
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const char *kernel_filename, const char *kernel_cmdline,
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const char *initrd_filename)
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{
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char buf[1024];
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int ret, linux_boot, initrd_size;
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linux_boot = (kernel_filename != NULL);
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/* allocate RAM */
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cpu_register_physical_memory(0, ram_size, 0);
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/* BIOS load */
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snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME);
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ret = load_image(buf, phys_ram_base + 0x000f0000);
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if (ret != 0x10000) {
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fprintf(stderr, "qemu: could not load PC bios '%s'\n", buf);
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exit(1);
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}
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/* VGA BIOS load */
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snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_FILENAME);
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ret = load_image(buf, phys_ram_base + 0x000c0000);
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/* setup basic memory access */
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cpu_register_physical_memory(0xc0000, 0x10000, 0xc0000 | IO_MEM_ROM);
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cpu_register_physical_memory(0xf0000, 0x10000, 0xf0000 | IO_MEM_ROM);
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bochs_bios_init();
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if (linux_boot) {
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uint8_t bootsect[512];
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if (bs_table[0] == NULL) {
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fprintf(stderr, "A disk image must be given for 'hda' when booting a Linux kernel\n");
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exit(1);
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}
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snprintf(buf, sizeof(buf), "%s/%s", bios_dir, LINUX_BOOT_FILENAME);
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ret = load_image(buf, bootsect);
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if (ret != sizeof(bootsect)) {
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fprintf(stderr, "qemu: could not load linux boot sector '%s'\n",
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buf);
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exit(1);
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}
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bdrv_set_boot_sector(bs_table[0], bootsect, sizeof(bootsect));
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/* now we can load the kernel */
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ret = load_kernel(kernel_filename,
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phys_ram_base + KERNEL_LOAD_ADDR,
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phys_ram_base + KERNEL_PARAMS_ADDR);
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if (ret < 0) {
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fprintf(stderr, "qemu: could not load kernel '%s'\n",
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kernel_filename);
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exit(1);
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}
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/* load initrd */
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initrd_size = 0;
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if (initrd_filename) {
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initrd_size = load_image(initrd_filename, phys_ram_base + INITRD_LOAD_ADDR);
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if (initrd_size < 0) {
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fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
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initrd_filename);
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exit(1);
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}
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}
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if (initrd_size > 0) {
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stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x218, INITRD_LOAD_ADDR);
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stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x21c, initrd_size);
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}
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pstrcpy(phys_ram_base + KERNEL_CMDLINE_ADDR, 4096,
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kernel_cmdline);
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stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x20, 0xA33F);
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stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x22,
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KERNEL_CMDLINE_ADDR - KERNEL_PARAMS_ADDR);
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/* loader type */
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stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x210, 0x01);
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}
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/* init basic PC hardware */
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register_ioport_write(0x80, 1, ioport80_write, 1);
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vga_initialize(ds, phys_ram_base + ram_size, ram_size,
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vga_ram_size);
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rtc_init(0x70, 8);
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cmos_init(ram_size, boot_device);
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register_ioport_read(0x61, 1, speaker_ioport_read, 1);
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register_ioport_write(0x61, 1, speaker_ioport_write, 1);
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pic_init();
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pit_init();
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serial_init(0x3f8, 4);
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ne2000_init(0x300, 9);
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ide_init();
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kbd_init();
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AUD_init();
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DMA_init();
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SB16_init();
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fdctrl_register((unsigned char **)fd_filename, snapshot, boot_device);
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}
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