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-rw-r--r--hw/pc.c368
1 files changed, 368 insertions, 0 deletions
diff --git a/hw/pc.c b/hw/pc.c
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index 0000000000..bee812c2b2
--- /dev/null
+++ b/hw/pc.c
@@ -0,0 +1,368 @@
+/*
+ * QEMU PC System Emulator
+ *
+ * Copyright (c) 2003-2004 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <getopt.h>
+#include <inttypes.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <time.h>
+#include <sys/time.h>
+#include <malloc.h>
+#include <termios.h>
+#include <sys/poll.h>
+#include <errno.h>
+#include <sys/wait.h>
+#include <netinet/in.h>
+
+#include "cpu.h"
+#include "vl.h"
+
+#define BIOS_FILENAME "bios.bin"
+#define VGABIOS_FILENAME "vgabios.bin"
+#define LINUX_BOOT_FILENAME "linux_boot.bin"
+
+#define KERNEL_LOAD_ADDR 0x00100000
+#define INITRD_LOAD_ADDR 0x00400000
+#define KERNEL_PARAMS_ADDR 0x00090000
+#define KERNEL_CMDLINE_ADDR 0x00099000
+
+int speaker_data_on;
+int dummy_refresh_clock;
+
+static void ioport80_write(CPUState *env, uint32_t addr, uint32_t data)
+{
+}
+
+#define REG_EQUIPMENT_BYTE 0x14
+
+static void cmos_init(int ram_size, int boot_device)
+{
+ RTCState *s = &rtc_state;
+ int val;
+
+ /* various important CMOS locations needed by PC/Bochs bios */
+
+ s->cmos_data[REG_EQUIPMENT_BYTE] = 0x02; /* FPU is there */
+ s->cmos_data[REG_EQUIPMENT_BYTE] |= 0x04; /* PS/2 mouse installed */
+
+ /* memory size */
+ val = (ram_size / 1024) - 1024;
+ if (val > 65535)
+ val = 65535;
+ s->cmos_data[0x17] = val;
+ s->cmos_data[0x18] = val >> 8;
+ s->cmos_data[0x30] = val;
+ s->cmos_data[0x31] = val >> 8;
+
+ val = (ram_size / 65536) - ((16 * 1024 * 1024) / 65536);
+ if (val > 65535)
+ val = 65535;
+ s->cmos_data[0x34] = val;
+ s->cmos_data[0x35] = val >> 8;
+
+ switch(boot_device) {
+ case 'a':
+ case 'b':
+ s->cmos_data[0x3d] = 0x01; /* floppy boot */
+ break;
+ default:
+ case 'c':
+ s->cmos_data[0x3d] = 0x02; /* hard drive boot */
+ break;
+ case 'd':
+ s->cmos_data[0x3d] = 0x03; /* CD-ROM boot */
+ break;
+ }
+}
+
+void cmos_register_fd (uint8_t fd0, uint8_t fd1)
+{
+ RTCState *s = &rtc_state;
+ int nb = 0;
+
+ s->cmos_data[0x10] = 0;
+ switch (fd0) {
+ case 0:
+ /* 1.44 Mb 3"5 drive */
+ s->cmos_data[0x10] |= 0x40;
+ break;
+ case 1:
+ /* 2.88 Mb 3"5 drive */
+ s->cmos_data[0x10] |= 0x60;
+ break;
+ case 2:
+ /* 1.2 Mb 5"5 drive */
+ s->cmos_data[0x10] |= 0x20;
+ break;
+ }
+ switch (fd1) {
+ case 0:
+ /* 1.44 Mb 3"5 drive */
+ s->cmos_data[0x10] |= 0x04;
+ break;
+ case 1:
+ /* 2.88 Mb 3"5 drive */
+ s->cmos_data[0x10] |= 0x06;
+ break;
+ case 2:
+ /* 1.2 Mb 5"5 drive */
+ s->cmos_data[0x10] |= 0x02;
+ break;
+ }
+ if (fd0 < 3)
+ nb++;
+ if (fd1 < 3)
+ nb++;
+ switch (nb) {
+ case 0:
+ break;
+ case 1:
+ s->cmos_data[REG_EQUIPMENT_BYTE] |= 0x01; /* 1 drive, ready for boot */
+ break;
+ case 2:
+ s->cmos_data[REG_EQUIPMENT_BYTE] |= 0x41; /* 2 drives, ready for boot */
+ break;
+ }
+}
+
+void speaker_ioport_write(CPUState *env, uint32_t addr, uint32_t val)
+{
+ speaker_data_on = (val >> 1) & 1;
+ pit_set_gate(&pit_channels[2], val & 1);
+}
+
+uint32_t speaker_ioport_read(CPUState *env, uint32_t addr)
+{
+ int out;
+ out = pit_get_out(&pit_channels[2]);
+ dummy_refresh_clock ^= 1;
+ return (speaker_data_on << 1) | pit_channels[2].gate | (out << 5) |
+ (dummy_refresh_clock << 4);
+}
+
+/***********************************************************/
+/* PC floppy disk controler emulation glue */
+#define PC_FDC_DMA 0x2
+#define PC_FDC_IRQ 0x6
+#define PC_FDC_BASE 0x3F0
+
+static void fdctrl_register (unsigned char **disknames, int ro,
+ char boot_device)
+{
+ int i;
+
+ fdctrl_init(PC_FDC_IRQ, PC_FDC_DMA, 0, PC_FDC_BASE, boot_device);
+ for (i = 0; i < MAX_FD; i++) {
+ if (disknames[i] != NULL)
+ fdctrl_disk_change(i, disknames[i], ro);
+ }
+}
+
+/***********************************************************/
+/* Bochs BIOS debug ports */
+
+void bochs_bios_write(CPUX86State *env, uint32_t addr, uint32_t val)
+{
+ switch(addr) {
+ /* Bochs BIOS messages */
+ case 0x400:
+ case 0x401:
+ fprintf(stderr, "BIOS panic at rombios.c, line %d\n", val);
+ exit(1);
+ case 0x402:
+ case 0x403:
+#ifdef DEBUG_BIOS
+ fprintf(stderr, "%c", val);
+#endif
+ break;
+
+ /* LGPL'ed VGA BIOS messages */
+ case 0x501:
+ case 0x502:
+ fprintf(stderr, "VGA BIOS panic, line %d\n", val);
+ exit(1);
+ case 0x500:
+ case 0x503:
+#ifdef DEBUG_BIOS
+ fprintf(stderr, "%c", val);
+#endif
+ break;
+ }
+}
+
+void bochs_bios_init(void)
+{
+ register_ioport_write(0x400, 1, bochs_bios_write, 2);
+ register_ioport_write(0x401, 1, bochs_bios_write, 2);
+ register_ioport_write(0x402, 1, bochs_bios_write, 1);
+ register_ioport_write(0x403, 1, bochs_bios_write, 1);
+
+ register_ioport_write(0x501, 1, bochs_bios_write, 2);
+ register_ioport_write(0x502, 1, bochs_bios_write, 2);
+ register_ioport_write(0x500, 1, bochs_bios_write, 1);
+ register_ioport_write(0x503, 1, bochs_bios_write, 1);
+}
+
+
+int load_kernel(const char *filename, uint8_t *addr,
+ uint8_t *real_addr)
+{
+ int fd, size;
+ int setup_sects;
+
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ return -1;
+
+ /* load 16 bit code */
+ if (read(fd, real_addr, 512) != 512)
+ goto fail;
+ setup_sects = real_addr[0x1F1];
+ if (!setup_sects)
+ setup_sects = 4;
+ if (read(fd, real_addr + 512, setup_sects * 512) !=
+ setup_sects * 512)
+ goto fail;
+
+ /* load 32 bit code */
+ size = read(fd, addr, 16 * 1024 * 1024);
+ if (size < 0)
+ goto fail;
+ close(fd);
+ return size;
+ fail:
+ close(fd);
+ return -1;
+}
+
+/* PC hardware initialisation */
+void pc_init(int ram_size, int vga_ram_size, int boot_device,
+ DisplayState *ds, const char **fd_filename, int snapshot,
+ const char *kernel_filename, const char *kernel_cmdline,
+ const char *initrd_filename)
+{
+ char buf[1024];
+ int ret, linux_boot, initrd_size;
+
+ linux_boot = (kernel_filename != NULL);
+
+ /* allocate RAM */
+ cpu_register_physical_memory(0, ram_size, 0);
+
+ /* BIOS load */
+ snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME);
+ ret = load_image(buf, phys_ram_base + 0x000f0000);
+ if (ret != 0x10000) {
+ fprintf(stderr, "qemu: could not load PC bios '%s'\n", buf);
+ exit(1);
+ }
+
+ /* VGA BIOS load */
+ snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_FILENAME);
+ ret = load_image(buf, phys_ram_base + 0x000c0000);
+
+ /* setup basic memory access */
+ cpu_register_physical_memory(0xc0000, 0x10000, 0xc0000 | IO_MEM_ROM);
+ cpu_register_physical_memory(0xf0000, 0x10000, 0xf0000 | IO_MEM_ROM);
+
+ bochs_bios_init();
+
+ if (linux_boot) {
+ uint8_t bootsect[512];
+
+ if (bs_table[0] == NULL) {
+ fprintf(stderr, "A disk image must be given for 'hda' when booting a Linux kernel\n");
+ exit(1);
+ }
+ snprintf(buf, sizeof(buf), "%s/%s", bios_dir, LINUX_BOOT_FILENAME);
+ ret = load_image(buf, bootsect);
+ if (ret != sizeof(bootsect)) {
+ fprintf(stderr, "qemu: could not load linux boot sector '%s'\n",
+ buf);
+ exit(1);
+ }
+
+ bdrv_set_boot_sector(bs_table[0], bootsect, sizeof(bootsect));
+
+ /* now we can load the kernel */
+ ret = load_kernel(kernel_filename,
+ phys_ram_base + KERNEL_LOAD_ADDR,
+ phys_ram_base + KERNEL_PARAMS_ADDR);
+ if (ret < 0) {
+ fprintf(stderr, "qemu: could not load kernel '%s'\n",
+ kernel_filename);
+ exit(1);
+ }
+
+ /* load initrd */
+ initrd_size = 0;
+ if (initrd_filename) {
+ initrd_size = load_image(initrd_filename, phys_ram_base + INITRD_LOAD_ADDR);
+ if (initrd_size < 0) {
+ fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
+ initrd_filename);
+ exit(1);
+ }
+ }
+ if (initrd_size > 0) {
+ stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x218, INITRD_LOAD_ADDR);
+ stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x21c, initrd_size);
+ }
+ pstrcpy(phys_ram_base + KERNEL_CMDLINE_ADDR, 4096,
+ kernel_cmdline);
+ stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x20, 0xA33F);
+ stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x22,
+ KERNEL_CMDLINE_ADDR - KERNEL_PARAMS_ADDR);
+ /* loader type */
+ stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x210, 0x01);
+ }
+
+ /* init basic PC hardware */
+ register_ioport_write(0x80, 1, ioport80_write, 1);
+
+ vga_initialize(ds, phys_ram_base + ram_size, ram_size,
+ vga_ram_size);
+
+ rtc_init(0x70, 8);
+ cmos_init(ram_size, boot_device);
+ register_ioport_read(0x61, 1, speaker_ioport_read, 1);
+ register_ioport_write(0x61, 1, speaker_ioport_write, 1);
+
+ pic_init();
+ pit_init();
+ serial_init(0x3f8, 4);
+ ne2000_init(0x300, 9);
+ ide_init();
+ kbd_init();
+ AUD_init();
+ DMA_init();
+ SB16_init();
+
+ fdctrl_register((unsigned char **)fd_filename, snapshot, boot_device);
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-07-10 04:15:34 +0000