2 * QEMU PC System Emulator
4 * Copyright (c) 2003-2004 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
41 #include <netinet/in.h>
46 /* output Bochs bios info messages */
49 #define BIOS_FILENAME "bios.bin"
50 #define VGABIOS_FILENAME "vgabios.bin"
51 #define LINUX_BOOT_FILENAME "linux_boot.bin"
53 #define KERNEL_LOAD_ADDR 0x00100000
54 #define INITRD_LOAD_ADDR 0x00400000
55 #define KERNEL_PARAMS_ADDR 0x00090000
56 #define KERNEL_CMDLINE_ADDR 0x00099000
59 int dummy_refresh_clock;
60 static fdctrl_t *floppy_controller;
62 static void ioport80_write(void *opaque, uint32_t addr, uint32_t data)
66 #define REG_EQUIPMENT_BYTE 0x14
68 static void cmos_init(int ram_size, int boot_device)
70 RTCState *s = &rtc_state;
74 /* various important CMOS locations needed by PC/Bochs bios */
76 s->cmos_data[REG_EQUIPMENT_BYTE] = 0x02; /* FPU is there */
77 s->cmos_data[REG_EQUIPMENT_BYTE] |= 0x04; /* PS/2 mouse installed */
80 val = (ram_size / 1024) - 1024;
83 s->cmos_data[0x17] = val;
84 s->cmos_data[0x18] = val >> 8;
85 s->cmos_data[0x30] = val;
86 s->cmos_data[0x31] = val >> 8;
88 val = (ram_size / 65536) - ((16 * 1024 * 1024) / 65536);
91 s->cmos_data[0x34] = val;
92 s->cmos_data[0x35] = val >> 8;
97 s->cmos_data[0x3d] = 0x01; /* floppy boot */
101 s->cmos_data[0x3d] = 0x02; /* hard drive boot */
104 s->cmos_data[0x3d] = 0x03; /* CD-ROM boot */
110 fd0 = fdctrl_get_drive_type(floppy_controller, 0);
111 fd1 = fdctrl_get_drive_type(floppy_controller, 1);
113 s->cmos_data[0x10] = 0;
116 /* 1.44 Mb 3"5 drive */
117 s->cmos_data[0x10] |= 0x40;
120 /* 2.88 Mb 3"5 drive */
121 s->cmos_data[0x10] |= 0x60;
124 /* 1.2 Mb 5"5 drive */
125 s->cmos_data[0x10] |= 0x20;
130 /* 1.44 Mb 3"5 drive */
131 s->cmos_data[0x10] |= 0x04;
134 /* 2.88 Mb 3"5 drive */
135 s->cmos_data[0x10] |= 0x06;
138 /* 1.2 Mb 5"5 drive */
139 s->cmos_data[0x10] |= 0x02;
151 s->cmos_data[REG_EQUIPMENT_BYTE] |= 0x01; /* 1 drive, ready for boot */
154 s->cmos_data[REG_EQUIPMENT_BYTE] |= 0x41; /* 2 drives, ready for boot */
159 static void speaker_ioport_write(void *opaque, uint32_t addr, uint32_t val)
161 speaker_data_on = (val >> 1) & 1;
162 pit_set_gate(&pit_channels[2], val & 1);
165 static uint32_t speaker_ioport_read(void *opaque, uint32_t addr)
168 out = pit_get_out(&pit_channels[2]);
169 dummy_refresh_clock ^= 1;
170 return (speaker_data_on << 1) | pit_channels[2].gate | (out << 5) |
171 (dummy_refresh_clock << 4);
174 /***********************************************************/
175 /* Bochs BIOS debug ports */
177 void bochs_bios_write(void *opaque, uint32_t addr, uint32_t val)
180 /* Bochs BIOS messages */
183 fprintf(stderr, "BIOS panic at rombios.c, line %d\n", val);
188 fprintf(stderr, "%c", val);
192 /* LGPL'ed VGA BIOS messages */
195 fprintf(stderr, "VGA BIOS panic, line %d\n", val);
200 fprintf(stderr, "%c", val);
206 void bochs_bios_init(void)
208 register_ioport_write(0x400, 1, 2, bochs_bios_write, NULL);
209 register_ioport_write(0x401, 1, 2, bochs_bios_write, NULL);
210 register_ioport_write(0x402, 1, 1, bochs_bios_write, NULL);
211 register_ioport_write(0x403, 1, 1, bochs_bios_write, NULL);
213 register_ioport_write(0x501, 1, 2, bochs_bios_write, NULL);
214 register_ioport_write(0x502, 1, 2, bochs_bios_write, NULL);
215 register_ioport_write(0x500, 1, 1, bochs_bios_write, NULL);
216 register_ioport_write(0x503, 1, 1, bochs_bios_write, NULL);
220 int load_kernel(const char *filename, uint8_t *addr,
226 fd = open(filename, O_RDONLY);
230 /* load 16 bit code */
231 if (read(fd, real_addr, 512) != 512)
233 setup_sects = real_addr[0x1F1];
236 if (read(fd, real_addr + 512, setup_sects * 512) !=
240 /* load 32 bit code */
241 size = read(fd, addr, 16 * 1024 * 1024);
251 static const int ide_iobase[2] = { 0x1f0, 0x170 };
252 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
253 static const int ide_irq[2] = { 14, 15 };
255 #define NE2000_NB_MAX 6
257 static uint32_t ne2000_io[NE2000_NB_MAX] = { 0x300, 0x320, 0x340, 0x360, 0x280, 0x380 };
258 static int ne2000_irq[NE2000_NB_MAX] = { 9, 10, 11, 3, 4, 5 };
260 /* PC hardware initialisation */
261 void pc_init(int ram_size, int vga_ram_size, int boot_device,
262 DisplayState *ds, const char **fd_filename, int snapshot,
263 const char *kernel_filename, const char *kernel_cmdline,
264 const char *initrd_filename)
267 int ret, linux_boot, initrd_size, i, nb_nics1, fd;
269 linux_boot = (kernel_filename != NULL);
272 cpu_register_physical_memory(0, ram_size, 0);
275 snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME);
276 ret = load_image(buf, phys_ram_base + 0x000f0000);
277 if (ret != 0x10000) {
278 fprintf(stderr, "qemu: could not load PC bios '%s'\n", buf);
283 snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_FILENAME);
284 ret = load_image(buf, phys_ram_base + 0x000c0000);
286 /* setup basic memory access */
287 cpu_register_physical_memory(0xc0000, 0x10000, 0xc0000 | IO_MEM_ROM);
288 cpu_register_physical_memory(0xf0000, 0x10000, 0xf0000 | IO_MEM_ROM);
293 uint8_t bootsect[512];
295 if (bs_table[0] == NULL) {
296 fprintf(stderr, "A disk image must be given for 'hda' when booting a Linux kernel\n");
299 snprintf(buf, sizeof(buf), "%s/%s", bios_dir, LINUX_BOOT_FILENAME);
300 ret = load_image(buf, bootsect);
301 if (ret != sizeof(bootsect)) {
302 fprintf(stderr, "qemu: could not load linux boot sector '%s'\n",
307 bdrv_set_boot_sector(bs_table[0], bootsect, sizeof(bootsect));
309 /* now we can load the kernel */
310 ret = load_kernel(kernel_filename,
311 phys_ram_base + KERNEL_LOAD_ADDR,
312 phys_ram_base + KERNEL_PARAMS_ADDR);
314 fprintf(stderr, "qemu: could not load kernel '%s'\n",
321 if (initrd_filename) {
322 initrd_size = load_image(initrd_filename, phys_ram_base + INITRD_LOAD_ADDR);
323 if (initrd_size < 0) {
324 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
329 if (initrd_size > 0) {
330 stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x218, INITRD_LOAD_ADDR);
331 stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x21c, initrd_size);
333 pstrcpy(phys_ram_base + KERNEL_CMDLINE_ADDR, 4096,
335 stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x20, 0xA33F);
336 stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x22,
337 KERNEL_CMDLINE_ADDR - KERNEL_PARAMS_ADDR);
339 stw_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x210, 0x01);
342 /* init basic PC hardware */
343 register_ioport_write(0x80, 1, 1, ioport80_write, NULL);
345 vga_initialize(ds, phys_ram_base + ram_size, ram_size,
349 register_ioport_read(0x61, 1, 1, speaker_ioport_read, NULL);
350 register_ioport_write(0x61, 1, 1, speaker_ioport_write, NULL);
355 fd = serial_open_device();
356 serial_init(0x3f8, 4, fd);
359 if (nb_nics1 > NE2000_NB_MAX)
360 nb_nics1 = NE2000_NB_MAX;
361 for(i = 0; i < nb_nics1; i++) {
362 ne2000_init(ne2000_io[i], ne2000_irq[i], &nd_table[i]);
365 for(i = 0; i < 2; i++) {
366 ide_init(ide_iobase[i], ide_iobase2[i], ide_irq[i],
367 bs_table[2 * i], bs_table[2 * i + 1]);
374 floppy_controller = fdctrl_init(6, 2, 0, 0x3f0, fd_table);
376 cmos_init(ram_size, boot_device);