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git.proxmox.com Git - mirror_qemu.git/blob - hw/pc.c
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
26 /* output Bochs bios info messages */
29 #define BIOS_FILENAME "bios.bin"
30 #define VGABIOS_FILENAME "vgabios.bin"
31 #define LINUX_BOOT_FILENAME "linux_boot.bin"
33 #define KERNEL_LOAD_ADDR 0x00100000
34 #define INITRD_LOAD_ADDR 0x00400000
35 #define KERNEL_PARAMS_ADDR 0x00090000
36 #define KERNEL_CMDLINE_ADDR 0x00099000
39 int dummy_refresh_clock
;
40 static fdctrl_t
*floppy_controller
;
41 static RTCState
*rtc_state
;
43 static void ioport80_write(void *opaque
, uint32_t addr
, uint32_t data
)
47 /* PC cmos mappings */
49 #define REG_EQUIPMENT_BYTE 0x14
50 #define REG_IBM_CENTURY_BYTE 0x32
51 #define REG_IBM_PS2_CENTURY_BYTE 0x37
54 static inline int to_bcd(RTCState
*s
, int a
)
56 return ((a
/ 10) << 4) | (a
% 10);
59 static void cmos_init(int ram_size
, int boot_device
)
61 RTCState
*s
= rtc_state
;
67 /* set the CMOS date */
72 val
= to_bcd(s
, (tm
->tm_year
/ 100) + 19);
73 rtc_set_memory(s
, REG_IBM_CENTURY_BYTE
, val
);
74 rtc_set_memory(s
, REG_IBM_PS2_CENTURY_BYTE
, val
);
76 /* various important CMOS locations needed by PC/Bochs bios */
79 val
= (ram_size
/ 1024) - 1024;
82 rtc_set_memory(s
, 0x17, val
);
83 rtc_set_memory(s
, 0x18, val
>> 8);
84 rtc_set_memory(s
, 0x30, val
);
85 rtc_set_memory(s
, 0x31, val
>> 8);
87 val
= (ram_size
/ 65536) - ((16 * 1024 * 1024) / 65536);
90 rtc_set_memory(s
, 0x34, val
);
91 rtc_set_memory(s
, 0x35, val
>> 8);
96 rtc_set_memory(s
, 0x3d, 0x01); /* floppy boot */
100 rtc_set_memory(s
, 0x3d, 0x02); /* hard drive boot */
103 rtc_set_memory(s
, 0x3d, 0x03); /* CD-ROM boot */
109 fd0
= fdctrl_get_drive_type(floppy_controller
, 0);
110 fd1
= fdctrl_get_drive_type(floppy_controller
, 1);
115 /* 1.44 Mb 3"5 drive */
119 /* 2.88 Mb 3"5 drive */
123 /* 1.2 Mb 5"5 drive */
129 /* 1.44 Mb 3"5 drive */
133 /* 2.88 Mb 3"5 drive */
137 /* 1.2 Mb 5"5 drive */
141 rtc_set_memory(s
, 0x10, val
);
153 val
|= 0x01; /* 1 drive, ready for boot */
156 val
|= 0x41; /* 2 drives, ready for boot */
159 val
|= 0x02; /* FPU is there */
160 val
|= 0x04; /* PS/2 mouse installed */
161 rtc_set_memory(s
, REG_EQUIPMENT_BYTE
, val
);
165 static void speaker_ioport_write(void *opaque
, uint32_t addr
, uint32_t val
)
167 speaker_data_on
= (val
>> 1) & 1;
168 pit_set_gate(&pit_channels
[2], val
& 1);
171 static uint32_t speaker_ioport_read(void *opaque
, uint32_t addr
)
174 out
= pit_get_out(&pit_channels
[2], qemu_get_clock(vm_clock
));
175 dummy_refresh_clock
^= 1;
176 return (speaker_data_on
<< 1) | pit_channels
[2].gate
| (out
<< 5) |
177 (dummy_refresh_clock
<< 4);
180 /***********************************************************/
181 /* Bochs BIOS debug ports */
183 void bochs_bios_write(void *opaque
, uint32_t addr
, uint32_t val
)
186 /* Bochs BIOS messages */
189 fprintf(stderr
, "BIOS panic at rombios.c, line %d\n", val
);
194 fprintf(stderr
, "%c", val
);
198 /* LGPL'ed VGA BIOS messages */
201 fprintf(stderr
, "VGA BIOS panic, line %d\n", val
);
206 fprintf(stderr
, "%c", val
);
212 void bochs_bios_init(void)
214 register_ioport_write(0x400, 1, 2, bochs_bios_write
, NULL
);
215 register_ioport_write(0x401, 1, 2, bochs_bios_write
, NULL
);
216 register_ioport_write(0x402, 1, 1, bochs_bios_write
, NULL
);
217 register_ioport_write(0x403, 1, 1, bochs_bios_write
, NULL
);
219 register_ioport_write(0x501, 1, 2, bochs_bios_write
, NULL
);
220 register_ioport_write(0x502, 1, 2, bochs_bios_write
, NULL
);
221 register_ioport_write(0x500, 1, 1, bochs_bios_write
, NULL
);
222 register_ioport_write(0x503, 1, 1, bochs_bios_write
, NULL
);
226 int load_kernel(const char *filename
, uint8_t *addr
,
232 fd
= open(filename
, O_RDONLY
);
236 /* load 16 bit code */
237 if (read(fd
, real_addr
, 512) != 512)
239 setup_sects
= real_addr
[0x1F1];
242 if (read(fd
, real_addr
+ 512, setup_sects
* 512) !=
246 /* load 32 bit code */
247 size
= read(fd
, addr
, 16 * 1024 * 1024);
257 static const int ide_iobase
[2] = { 0x1f0, 0x170 };
258 static const int ide_iobase2
[2] = { 0x3f6, 0x376 };
259 static const int ide_irq
[2] = { 14, 15 };
261 #define NE2000_NB_MAX 6
263 static uint32_t ne2000_io
[NE2000_NB_MAX
] = { 0x300, 0x320, 0x340, 0x360, 0x280, 0x380 };
264 static int ne2000_irq
[NE2000_NB_MAX
] = { 9, 10, 11, 3, 4, 5 };
266 /* PC hardware initialisation */
267 void pc_init(int ram_size
, int vga_ram_size
, int boot_device
,
268 DisplayState
*ds
, const char **fd_filename
, int snapshot
,
269 const char *kernel_filename
, const char *kernel_cmdline
,
270 const char *initrd_filename
)
273 int ret
, linux_boot
, initrd_size
, i
, nb_nics1
, fd
;
275 linux_boot
= (kernel_filename
!= NULL
);
278 cpu_register_physical_memory(0, ram_size
, 0);
281 snprintf(buf
, sizeof(buf
), "%s/%s", bios_dir
, BIOS_FILENAME
);
282 ret
= load_image(buf
, phys_ram_base
+ 0x000f0000);
283 if (ret
!= 0x10000) {
284 fprintf(stderr
, "qemu: could not load PC bios '%s'\n", buf
);
289 snprintf(buf
, sizeof(buf
), "%s/%s", bios_dir
, VGABIOS_FILENAME
);
290 ret
= load_image(buf
, phys_ram_base
+ 0x000c0000);
292 /* setup basic memory access */
293 cpu_register_physical_memory(0xc0000, 0x10000, 0xc0000 | IO_MEM_ROM
);
294 cpu_register_physical_memory(0xf0000, 0x10000, 0xf0000 | IO_MEM_ROM
);
299 uint8_t bootsect
[512];
301 if (bs_table
[0] == NULL
) {
302 fprintf(stderr
, "A disk image must be given for 'hda' when booting a Linux kernel\n");
305 snprintf(buf
, sizeof(buf
), "%s/%s", bios_dir
, LINUX_BOOT_FILENAME
);
306 ret
= load_image(buf
, bootsect
);
307 if (ret
!= sizeof(bootsect
)) {
308 fprintf(stderr
, "qemu: could not load linux boot sector '%s'\n",
313 bdrv_set_boot_sector(bs_table
[0], bootsect
, sizeof(bootsect
));
315 /* now we can load the kernel */
316 ret
= load_kernel(kernel_filename
,
317 phys_ram_base
+ KERNEL_LOAD_ADDR
,
318 phys_ram_base
+ KERNEL_PARAMS_ADDR
);
320 fprintf(stderr
, "qemu: could not load kernel '%s'\n",
327 if (initrd_filename
) {
328 initrd_size
= load_image(initrd_filename
, phys_ram_base
+ INITRD_LOAD_ADDR
);
329 if (initrd_size
< 0) {
330 fprintf(stderr
, "qemu: could not load initial ram disk '%s'\n",
335 if (initrd_size
> 0) {
336 stl_raw(phys_ram_base
+ KERNEL_PARAMS_ADDR
+ 0x218, INITRD_LOAD_ADDR
);
337 stl_raw(phys_ram_base
+ KERNEL_PARAMS_ADDR
+ 0x21c, initrd_size
);
339 pstrcpy(phys_ram_base
+ KERNEL_CMDLINE_ADDR
, 4096,
341 stw_raw(phys_ram_base
+ KERNEL_PARAMS_ADDR
+ 0x20, 0xA33F);
342 stw_raw(phys_ram_base
+ KERNEL_PARAMS_ADDR
+ 0x22,
343 KERNEL_CMDLINE_ADDR
- KERNEL_PARAMS_ADDR
);
345 stw_raw(phys_ram_base
+ KERNEL_PARAMS_ADDR
+ 0x210, 0x01);
348 /* init basic PC hardware */
349 register_ioport_write(0x80, 1, 1, ioport80_write
, NULL
);
351 vga_initialize(ds
, phys_ram_base
+ ram_size
, ram_size
,
354 rtc_state
= rtc_init(0x70, 8);
355 register_ioport_read(0x61, 1, 1, speaker_ioport_read
, NULL
);
356 register_ioport_write(0x61, 1, 1, speaker_ioport_write
, NULL
);
361 fd
= serial_open_device();
362 serial_init(0x3f8, 4, fd
);
365 if (nb_nics1
> NE2000_NB_MAX
)
366 nb_nics1
= NE2000_NB_MAX
;
367 for(i
= 0; i
< nb_nics1
; i
++) {
368 ne2000_init(ne2000_io
[i
], ne2000_irq
[i
], &nd_table
[i
]);
371 for(i
= 0; i
< 2; i
++) {
372 ide_init(ide_iobase
[i
], ide_iobase2
[i
], ide_irq
[i
],
373 bs_table
[2 * i
], bs_table
[2 * i
+ 1]);
379 /* no audio supported yet for win32 */
384 floppy_controller
= fdctrl_init(6, 2, 0, 0x3f0, fd_table
);
386 cmos_init(ram_size
, boot_device
);