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qemu-irix/hw/pc.c

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/*
* 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 "vl.h"
/* output Bochs bios info messages */
//#define DEBUG_BIOS
#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 fdctrl_t *floppy_controller;
static RTCState *rtc_state;
static void ioport80_write(void *opaque, uint32_t addr, uint32_t data)
{
}
/* PC cmos mappings */
#define REG_EQUIPMENT_BYTE 0x14
#define REG_IBM_CENTURY_BYTE 0x32
#define REG_IBM_PS2_CENTURY_BYTE 0x37
static inline int to_bcd(RTCState *s, int a)
{
return ((a / 10) << 4) | (a % 10);
}
static void cmos_init(int ram_size, int boot_device)
{
RTCState *s = rtc_state;
int val;
int fd0, fd1, nb;
time_t ti;
struct tm *tm;
/* set the CMOS date */
time(&ti);
tm = gmtime(&ti);
rtc_set_date(s, tm);
val = to_bcd(s, (tm->tm_year / 100) + 19);
rtc_set_memory(s, REG_IBM_CENTURY_BYTE, val);
rtc_set_memory(s, REG_IBM_PS2_CENTURY_BYTE, val);
/* various important CMOS locations needed by PC/Bochs bios */
/* memory size */
val = 640; /* base memory in K */
rtc_set_memory(s, 0x15, val);
rtc_set_memory(s, 0x16, val >> 8);
val = (ram_size / 1024) - 1024;
if (val > 65535)
val = 65535;
rtc_set_memory(s, 0x17, val);
rtc_set_memory(s, 0x18, val >> 8);
rtc_set_memory(s, 0x30, val);
rtc_set_memory(s, 0x31, val >> 8);
val = (ram_size / 65536) - ((16 * 1024 * 1024) / 65536);
if (val > 65535)
val = 65535;
rtc_set_memory(s, 0x34, val);
rtc_set_memory(s, 0x35, val >> 8);
switch(boot_device) {
case 'a':
case 'b':
rtc_set_memory(s, 0x3d, 0x01); /* floppy boot */
break;
default:
case 'c':
rtc_set_memory(s, 0x3d, 0x02); /* hard drive boot */
break;
case 'd':
rtc_set_memory(s, 0x3d, 0x03); /* CD-ROM boot */
break;
}
/* floppy type */
fd0 = fdctrl_get_drive_type(floppy_controller, 0);
fd1 = fdctrl_get_drive_type(floppy_controller, 1);
val = 0;
switch (fd0) {
case 0:
/* 1.44 Mb 3"5 drive */
val |= 0x40;
break;
case 1:
/* 2.88 Mb 3"5 drive */
val |= 0x60;
break;
case 2:
/* 1.2 Mb 5"5 drive */
val |= 0x20;
break;
}
switch (fd1) {
case 0:
/* 1.44 Mb 3"5 drive */
val |= 0x04;
break;
case 1:
/* 2.88 Mb 3"5 drive */
val |= 0x06;
break;
case 2:
/* 1.2 Mb 5"5 drive */
val |= 0x02;
break;
}
rtc_set_memory(s, 0x10, val);
val = 0;
nb = 0;
if (fd0 < 3)
nb++;
if (fd1 < 3)
nb++;
switch (nb) {
case 0:
break;
case 1:
val |= 0x01; /* 1 drive, ready for boot */
break;
case 2:
val |= 0x41; /* 2 drives, ready for boot */
break;
}
val |= 0x02; /* FPU is there */
val |= 0x04; /* PS/2 mouse installed */
rtc_set_memory(s, REG_EQUIPMENT_BYTE, val);
}
static void speaker_ioport_write(void *opaque, uint32_t addr, uint32_t val)
{
speaker_data_on = (val >> 1) & 1;
pit_set_gate(&pit_channels[2], val & 1);
}
static uint32_t speaker_ioport_read(void *opaque, uint32_t addr)
{
int out;
out = pit_get_out(&pit_channels[2], qemu_get_clock(vm_clock));
dummy_refresh_clock ^= 1;
return (speaker_data_on << 1) | pit_channels[2].gate | (out << 5) |
(dummy_refresh_clock << 4);
}
static void ioport92_write(void *opaque, uint32_t addr, uint32_t val)
{
cpu_x86_set_a20(cpu_single_env, (val >> 1) & 1);
/* XXX: bit 0 is fast reset */
}
static uint32_t ioport92_read(void *opaque, uint32_t addr)
{
return ((cpu_single_env->a20_mask >> 20) & 1) << 1;
}
/***********************************************************/
/* Bochs BIOS debug ports */
void bochs_bios_write(void *opaque, 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, 2, bochs_bios_write, NULL);
register_ioport_write(0x401, 1, 2, bochs_bios_write, NULL);
register_ioport_write(0x402, 1, 1, bochs_bios_write, NULL);
register_ioport_write(0x403, 1, 1, bochs_bios_write, NULL);
register_ioport_write(0x501, 1, 2, bochs_bios_write, NULL);
register_ioport_write(0x502, 1, 2, bochs_bios_write, NULL);
register_ioport_write(0x500, 1, 1, bochs_bios_write, NULL);
register_ioport_write(0x503, 1, 1, bochs_bios_write, NULL);
}
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;
}
static const int ide_iobase[2] = { 0x1f0, 0x170 };
static const int ide_iobase2[2] = { 0x3f6, 0x376 };
static const int ide_irq[2] = { 14, 15 };
#define NE2000_NB_MAX 6
static uint32_t ne2000_io[NE2000_NB_MAX] = { 0x300, 0x320, 0x340, 0x360, 0x280, 0x380 };
static int ne2000_irq[NE2000_NB_MAX] = { 9, 10, 11, 3, 4, 5 };
/* 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, i, nb_nics1, fd;
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(0xd0000, 0x20000, IO_MEM_UNASSIGNED);
cpu_register_physical_memory(0xf0000, 0x10000, 0xf0000 | IO_MEM_ROM);
bochs_bios_init();
if (linux_boot) {
uint8_t bootsect[512];
uint8_t old_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);
}
if (bdrv_read(bs_table[0], 0, old_bootsect, 1) >= 0) {
/* copy the MSDOS partition table */
memcpy(bootsect + 0x1be, old_bootsect + 0x1be, 0x40);
}
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, 1, ioport80_write, NULL);
vga_initialize(ds, phys_ram_base + ram_size, ram_size,
vga_ram_size);
rtc_state = rtc_init(0x70, 8);
register_ioport_read(0x61, 1, 1, speaker_ioport_read, NULL);
register_ioport_write(0x61, 1, 1, speaker_ioport_write, NULL);
register_ioport_read(0x92, 1, 1, ioport92_read, NULL);
register_ioport_write(0x92, 1, 1, ioport92_write, NULL);
pic_init();
pit_init(0x40, 0);
fd = serial_open_device();
serial_init(0x3f8, 4, fd);
nb_nics1 = nb_nics;
if (nb_nics1 > NE2000_NB_MAX)
nb_nics1 = NE2000_NB_MAX;
for(i = 0; i < nb_nics1; i++) {
ne2000_init(ne2000_io[i], ne2000_irq[i], &nd_table[i]);
}
for(i = 0; i < 2; i++) {
ide_init(ide_iobase[i], ide_iobase2[i], ide_irq[i],
bs_table[2 * i], bs_table[2 * i + 1]);
}
kbd_init();
DMA_init();
#ifndef _WIN32
/* no audio supported yet for win32 */
AUD_init();
SB16_init();
#endif
floppy_controller = fdctrl_init(6, 2, 0, 0x3f0, fd_table);
cmos_init(ram_size, boot_device);
}
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