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
30 #include "audio/audio.h"
36 #include "virtio-blk.h"
37 #include "virtio-balloon.h"
38 #include "virtio-console.h"
39 #include "hpet_emul.h"
41 /* output Bochs bios info messages */
44 #define BIOS_FILENAME "bios.bin"
45 #define VGABIOS_FILENAME "vgabios.bin"
46 #define VGABIOS_CIRRUS_FILENAME "vgabios-cirrus.bin"
48 #define PC_MAX_BIOS_SIZE (4 * 1024 * 1024)
50 /* Leave a chunk of memory at the top of RAM for the BIOS ACPI tables. */
51 #define ACPI_DATA_SIZE 0x10000
52 #define BIOS_CFG_IOPORT 0x510
53 #define FW_CFG_ACPI_TABLES (FW_CFG_ARCH_LOCAL + 0)
57 static fdctrl_t *floppy_controller;
58 static RTCState *rtc_state;
60 static IOAPICState *ioapic;
61 static PCIDevice *i440fx_state;
63 static void ioport80_write(void *opaque, uint32_t addr, uint32_t data)
67 /* MSDOS compatibility mode FPU exception support */
68 static qemu_irq ferr_irq;
69 /* XXX: add IGNNE support */
70 void cpu_set_ferr(CPUX86State *s)
72 qemu_irq_raise(ferr_irq);
75 static void ioportF0_write(void *opaque, uint32_t addr, uint32_t data)
77 qemu_irq_lower(ferr_irq);
81 uint64_t cpu_get_tsc(CPUX86State *env)
83 /* Note: when using kqemu, it is more logical to return the host TSC
84 because kqemu does not trap the RDTSC instruction for
85 performance reasons */
87 if (env->kqemu_enabled) {
88 return cpu_get_real_ticks();
92 return cpu_get_ticks();
97 void cpu_smm_update(CPUState *env)
99 if (i440fx_state && env == first_cpu)
100 i440fx_set_smm(i440fx_state, (env->hflags >> HF_SMM_SHIFT) & 1);
105 int cpu_get_pic_interrupt(CPUState *env)
109 intno = apic_get_interrupt(env);
111 /* set irq request if a PIC irq is still pending */
112 /* XXX: improve that */
113 pic_update_irq(isa_pic);
116 /* read the irq from the PIC */
117 if (!apic_accept_pic_intr(env))
120 intno = pic_read_irq(isa_pic);
124 static void pic_irq_request(void *opaque, int irq, int level)
126 CPUState *env = first_cpu;
128 if (env->apic_state) {
130 if (apic_accept_pic_intr(env))
131 apic_deliver_pic_intr(env, level);
136 cpu_interrupt(env, CPU_INTERRUPT_HARD);
138 cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
142 /* PC cmos mappings */
144 #define REG_EQUIPMENT_BYTE 0x14
146 static int cmos_get_fd_drive_type(int fd0)
152 /* 1.44 Mb 3"5 drive */
156 /* 2.88 Mb 3"5 drive */
160 /* 1.2 Mb 5"5 drive */
170 static void cmos_init_hd(int type_ofs, int info_ofs, BlockDriverState *hd)
172 RTCState *s = rtc_state;
173 int cylinders, heads, sectors;
174 bdrv_get_geometry_hint(hd, &cylinders, &heads, §ors);
175 rtc_set_memory(s, type_ofs, 47);
176 rtc_set_memory(s, info_ofs, cylinders);
177 rtc_set_memory(s, info_ofs + 1, cylinders >> 8);
178 rtc_set_memory(s, info_ofs + 2, heads);
179 rtc_set_memory(s, info_ofs + 3, 0xff);
180 rtc_set_memory(s, info_ofs + 4, 0xff);
181 rtc_set_memory(s, info_ofs + 5, 0xc0 | ((heads > 8) << 3));
182 rtc_set_memory(s, info_ofs + 6, cylinders);
183 rtc_set_memory(s, info_ofs + 7, cylinders >> 8);
184 rtc_set_memory(s, info_ofs + 8, sectors);
187 /* convert boot_device letter to something recognizable by the bios */
188 static int boot_device2nibble(char boot_device)
190 switch(boot_device) {
193 return 0x01; /* floppy boot */
195 return 0x02; /* hard drive boot */
197 return 0x03; /* CD-ROM boot */
199 return 0x04; /* Network boot */
204 /* copy/pasted from cmos_init, should be made a general function
205 and used there as well */
206 static int pc_boot_set(void *opaque, const char *boot_device)
208 Monitor *mon = cur_mon;
209 #define PC_MAX_BOOT_DEVICES 3
210 RTCState *s = (RTCState *)opaque;
211 int nbds, bds[3] = { 0, };
214 nbds = strlen(boot_device);
215 if (nbds > PC_MAX_BOOT_DEVICES) {
216 monitor_printf(mon, "Too many boot devices for PC\n");
219 for (i = 0; i < nbds; i++) {
220 bds[i] = boot_device2nibble(boot_device[i]);
222 monitor_printf(mon, "Invalid boot device for PC: '%c'\n",
227 rtc_set_memory(s, 0x3d, (bds[1] << 4) | bds[0]);
228 rtc_set_memory(s, 0x38, (bds[2] << 4));
232 /* hd_table must contain 4 block drivers */
233 static void cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size,
234 const char *boot_device, BlockDriverState **hd_table)
236 RTCState *s = rtc_state;
237 int nbds, bds[3] = { 0, };
242 /* various important CMOS locations needed by PC/Bochs bios */
245 val = 640; /* base memory in K */
246 rtc_set_memory(s, 0x15, val);
247 rtc_set_memory(s, 0x16, val >> 8);
249 val = (ram_size / 1024) - 1024;
252 rtc_set_memory(s, 0x17, val);
253 rtc_set_memory(s, 0x18, val >> 8);
254 rtc_set_memory(s, 0x30, val);
255 rtc_set_memory(s, 0x31, val >> 8);
257 if (above_4g_mem_size) {
258 rtc_set_memory(s, 0x5b, (unsigned int)above_4g_mem_size >> 16);
259 rtc_set_memory(s, 0x5c, (unsigned int)above_4g_mem_size >> 24);
260 rtc_set_memory(s, 0x5d, (uint64_t)above_4g_mem_size >> 32);
263 if (ram_size > (16 * 1024 * 1024))
264 val = (ram_size / 65536) - ((16 * 1024 * 1024) / 65536);
269 rtc_set_memory(s, 0x34, val);
270 rtc_set_memory(s, 0x35, val >> 8);
272 /* set the number of CPU */
273 rtc_set_memory(s, 0x5f, smp_cpus - 1);
275 /* set boot devices, and disable floppy signature check if requested */
276 #define PC_MAX_BOOT_DEVICES 3
277 nbds = strlen(boot_device);
278 if (nbds > PC_MAX_BOOT_DEVICES) {
279 fprintf(stderr, "Too many boot devices for PC\n");
282 for (i = 0; i < nbds; i++) {
283 bds[i] = boot_device2nibble(boot_device[i]);
285 fprintf(stderr, "Invalid boot device for PC: '%c'\n",
290 rtc_set_memory(s, 0x3d, (bds[1] << 4) | bds[0]);
291 rtc_set_memory(s, 0x38, (bds[2] << 4) | (fd_bootchk ? 0x0 : 0x1));
295 fd0 = fdctrl_get_drive_type(floppy_controller, 0);
296 fd1 = fdctrl_get_drive_type(floppy_controller, 1);
298 val = (cmos_get_fd_drive_type(fd0) << 4) | cmos_get_fd_drive_type(fd1);
299 rtc_set_memory(s, 0x10, val);
311 val |= 0x01; /* 1 drive, ready for boot */
314 val |= 0x41; /* 2 drives, ready for boot */
317 val |= 0x02; /* FPU is there */
318 val |= 0x04; /* PS/2 mouse installed */
319 rtc_set_memory(s, REG_EQUIPMENT_BYTE, val);
323 rtc_set_memory(s, 0x12, (hd_table[0] ? 0xf0 : 0) | (hd_table[1] ? 0x0f : 0));
325 cmos_init_hd(0x19, 0x1b, hd_table[0]);
327 cmos_init_hd(0x1a, 0x24, hd_table[1]);
330 for (i = 0; i < 4; i++) {
332 int cylinders, heads, sectors, translation;
333 /* NOTE: bdrv_get_geometry_hint() returns the physical
334 geometry. It is always such that: 1 <= sects <= 63, 1
335 <= heads <= 16, 1 <= cylinders <= 16383. The BIOS
336 geometry can be different if a translation is done. */
337 translation = bdrv_get_translation_hint(hd_table[i]);
338 if (translation == BIOS_ATA_TRANSLATION_AUTO) {
339 bdrv_get_geometry_hint(hd_table[i], &cylinders, &heads, §ors);
340 if (cylinders <= 1024 && heads <= 16 && sectors <= 63) {
341 /* No translation. */
344 /* LBA translation. */
350 val |= translation << (i * 2);
353 rtc_set_memory(s, 0x39, val);
356 void ioport_set_a20(int enable)
358 /* XXX: send to all CPUs ? */
359 cpu_x86_set_a20(first_cpu, enable);
362 int ioport_get_a20(void)
364 return ((first_cpu->a20_mask >> 20) & 1);
367 static void ioport92_write(void *opaque, uint32_t addr, uint32_t val)
369 ioport_set_a20((val >> 1) & 1);
370 /* XXX: bit 0 is fast reset */
373 static uint32_t ioport92_read(void *opaque, uint32_t addr)
375 return ioport_get_a20() << 1;
378 /***********************************************************/
379 /* Bochs BIOS debug ports */
381 static void bochs_bios_write(void *opaque, uint32_t addr, uint32_t val)
383 static const char shutdown_str[8] = "Shutdown";
384 static int shutdown_index = 0;
387 /* Bochs BIOS messages */
390 fprintf(stderr, "BIOS panic at rombios.c, line %d\n", val);
395 fprintf(stderr, "%c", val);
399 /* same as Bochs power off */
400 if (val == shutdown_str[shutdown_index]) {
402 if (shutdown_index == 8) {
404 qemu_system_shutdown_request();
411 /* LGPL'ed VGA BIOS messages */
414 fprintf(stderr, "VGA BIOS panic, line %d\n", val);
419 fprintf(stderr, "%c", val);
425 static void bochs_bios_init(void)
429 register_ioport_write(0x400, 1, 2, bochs_bios_write, NULL);
430 register_ioport_write(0x401, 1, 2, bochs_bios_write, NULL);
431 register_ioport_write(0x402, 1, 1, bochs_bios_write, NULL);
432 register_ioport_write(0x403, 1, 1, bochs_bios_write, NULL);
433 register_ioport_write(0x8900, 1, 1, bochs_bios_write, NULL);
435 register_ioport_write(0x501, 1, 2, bochs_bios_write, NULL);
436 register_ioport_write(0x502, 1, 2, bochs_bios_write, NULL);
437 register_ioport_write(0x500, 1, 1, bochs_bios_write, NULL);
438 register_ioport_write(0x503, 1, 1, bochs_bios_write, NULL);
440 fw_cfg = fw_cfg_init(BIOS_CFG_IOPORT, BIOS_CFG_IOPORT + 1, 0, 0);
441 fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);
442 fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
443 fw_cfg_add_bytes(fw_cfg, FW_CFG_ACPI_TABLES, (uint8_t *)acpi_tables,
447 /* Generate an initial boot sector which sets state and jump to
448 a specified vector */
449 static void generate_bootsect(target_phys_addr_t option_rom,
450 uint32_t gpr[8], uint16_t segs[6], uint16_t ip)
452 uint8_t rom[512], *p, *reloc;
456 memset(rom, 0, sizeof(rom));
459 /* Make sure we have an option rom signature */
463 /* ROM size in sectors*/
468 *p++ = 0x50; /* push ax */
469 *p++ = 0x1e; /* push ds */
470 *p++ = 0x31; *p++ = 0xc0; /* xor ax, ax */
471 *p++ = 0x8e; *p++ = 0xd8; /* mov ax, ds */
473 *p++ = 0xc7; *p++ = 0x06; /* movvw _start,0x64 */
474 *p++ = 0x64; *p++ = 0x00;
476 *p++ = 0x00; *p++ = 0x00;
478 *p++ = 0x8c; *p++ = 0x0e; /* mov cs,0x66 */
479 *p++ = 0x66; *p++ = 0x00;
481 *p++ = 0x1f; /* pop ds */
482 *p++ = 0x58; /* pop ax */
483 *p++ = 0xcb; /* lret */
488 *p++ = 0xfa; /* CLI */
489 *p++ = 0xfc; /* CLD */
491 for (i = 0; i < 6; i++) {
492 if (i == 1) /* Skip CS */
495 *p++ = 0xb8; /* MOV AX,imm16 */
498 *p++ = 0x8e; /* MOV <seg>,AX */
499 *p++ = 0xc0 + (i << 3);
502 for (i = 0; i < 8; i++) {
503 *p++ = 0x66; /* 32-bit operand size */
504 *p++ = 0xb8 + i; /* MOV <reg>,imm32 */
511 *p++ = 0xea; /* JMP FAR */
514 *p++ = segs[1]; /* CS */
519 for (i = 0; i < (sizeof(rom) - 1); i++)
521 rom[sizeof(rom) - 1] = -sum;
523 cpu_physical_memory_write_rom(option_rom, rom, sizeof(rom));
526 static long get_file_size(FILE *f)
530 /* XXX: on Unix systems, using fstat() probably makes more sense */
533 fseek(f, 0, SEEK_END);
535 fseek(f, where, SEEK_SET);
540 static void load_linux(target_phys_addr_t option_rom,
541 const char *kernel_filename,
542 const char *initrd_filename,
543 const char *kernel_cmdline)
549 int setup_size, kernel_size, initrd_size, cmdline_size;
551 uint8_t header[1024];
552 target_phys_addr_t real_addr, prot_addr, cmdline_addr, initrd_addr;
555 /* Align to 16 bytes as a paranoia measure */
556 cmdline_size = (strlen(kernel_cmdline)+16) & ~15;
558 /* load the kernel header */
559 f = fopen(kernel_filename, "rb");
560 if (!f || !(kernel_size = get_file_size(f)) ||
561 fread(header, 1, 1024, f) != 1024) {
562 fprintf(stderr, "qemu: could not load kernel '%s'\n",
567 /* kernel protocol version */
569 fprintf(stderr, "header magic: %#x\n", ldl_p(header+0x202));
571 if (ldl_p(header+0x202) == 0x53726448)
572 protocol = lduw_p(header+0x206);
576 if (protocol < 0x200 || !(header[0x211] & 0x01)) {
579 cmdline_addr = 0x9a000 - cmdline_size;
581 } else if (protocol < 0x202) {
582 /* High but ancient kernel */
584 cmdline_addr = 0x9a000 - cmdline_size;
585 prot_addr = 0x100000;
587 /* High and recent kernel */
589 cmdline_addr = 0x20000;
590 prot_addr = 0x100000;
595 "qemu: real_addr = 0x" TARGET_FMT_plx "\n"
596 "qemu: cmdline_addr = 0x" TARGET_FMT_plx "\n"
597 "qemu: prot_addr = 0x" TARGET_FMT_plx "\n",
603 /* highest address for loading the initrd */
604 if (protocol >= 0x203)
605 initrd_max = ldl_p(header+0x22c);
607 initrd_max = 0x37ffffff;
609 if (initrd_max >= ram_size-ACPI_DATA_SIZE)
610 initrd_max = ram_size-ACPI_DATA_SIZE-1;
612 /* kernel command line */
613 pstrcpy_targphys(cmdline_addr, 4096, kernel_cmdline);
615 if (protocol >= 0x202) {
616 stl_p(header+0x228, cmdline_addr);
618 stw_p(header+0x20, 0xA33F);
619 stw_p(header+0x22, cmdline_addr-real_addr);
623 /* High nybble = B reserved for Qemu; low nybble is revision number.
624 If this code is substantially changed, you may want to consider
625 incrementing the revision. */
626 if (protocol >= 0x200)
627 header[0x210] = 0xB0;
630 if (protocol >= 0x201) {
631 header[0x211] |= 0x80; /* CAN_USE_HEAP */
632 stw_p(header+0x224, cmdline_addr-real_addr-0x200);
636 if (initrd_filename) {
637 if (protocol < 0x200) {
638 fprintf(stderr, "qemu: linux kernel too old to load a ram disk\n");
642 fi = fopen(initrd_filename, "rb");
644 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
649 initrd_size = get_file_size(fi);
650 initrd_addr = (initrd_max-initrd_size) & ~4095;
652 fprintf(stderr, "qemu: loading initrd (%#x bytes) at 0x" TARGET_FMT_plx
653 "\n", initrd_size, initrd_addr);
655 if (!fread_targphys_ok(initrd_addr, initrd_size, fi)) {
656 fprintf(stderr, "qemu: read error on initial ram disk '%s'\n",
662 stl_p(header+0x218, initrd_addr);
663 stl_p(header+0x21c, initrd_size);
666 /* store the finalized header and load the rest of the kernel */
667 cpu_physical_memory_write(real_addr, header, 1024);
669 setup_size = header[0x1f1];
673 setup_size = (setup_size+1)*512;
674 kernel_size -= setup_size; /* Size of protected-mode code */
676 if (!fread_targphys_ok(real_addr+1024, setup_size-1024, f) ||
677 !fread_targphys_ok(prot_addr, kernel_size, f)) {
678 fprintf(stderr, "qemu: read error on kernel '%s'\n",
684 /* generate bootsector to set up the initial register state */
685 real_seg = real_addr >> 4;
686 seg[0] = seg[2] = seg[3] = seg[4] = seg[4] = real_seg;
687 seg[1] = real_seg+0x20; /* CS */
688 memset(gpr, 0, sizeof gpr);
689 gpr[4] = cmdline_addr-real_addr-16; /* SP (-16 is paranoia) */
691 generate_bootsect(option_rom, gpr, seg, 0);
694 static void main_cpu_reset(void *opaque)
696 CPUState *env = opaque;
700 static const int ide_iobase[2] = { 0x1f0, 0x170 };
701 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
702 static const int ide_irq[2] = { 14, 15 };
704 #define NE2000_NB_MAX 6
706 static int ne2000_io[NE2000_NB_MAX] = { 0x300, 0x320, 0x340, 0x360, 0x280, 0x380 };
707 static int ne2000_irq[NE2000_NB_MAX] = { 9, 10, 11, 3, 4, 5 };
709 static int serial_io[MAX_SERIAL_PORTS] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
710 static int serial_irq[MAX_SERIAL_PORTS] = { 4, 3, 4, 3 };
712 static int parallel_io[MAX_PARALLEL_PORTS] = { 0x378, 0x278, 0x3bc };
713 static int parallel_irq[MAX_PARALLEL_PORTS] = { 7, 7, 7 };
716 static void audio_init (PCIBus *pci_bus, qemu_irq *pic)
719 int audio_enabled = 0;
721 for (c = soundhw; !audio_enabled && c->name; ++c) {
722 audio_enabled = c->enabled;
730 for (c = soundhw; c->name; ++c) {
733 c->init.init_isa (s, pic);
737 c->init.init_pci (pci_bus, s);
747 static void pc_init_ne2k_isa(NICInfo *nd, qemu_irq *pic)
749 static int nb_ne2k = 0;
751 if (nb_ne2k == NE2000_NB_MAX)
753 isa_ne2000_init(ne2000_io[nb_ne2k], pic[ne2000_irq[nb_ne2k]], nd);
757 static int load_option_rom(const char *oprom, target_phys_addr_t start,
758 target_phys_addr_t end)
762 size = get_image_size(oprom);
763 if (size > 0 && start + size > end) {
764 fprintf(stderr, "Not enough space to load option rom '%s'\n",
768 size = load_image_targphys(oprom, start, end - start);
770 fprintf(stderr, "Could not load option rom '%s'\n", oprom);
773 /* Round up optiom rom size to the next 2k boundary */
774 size = (size + 2047) & ~2047;
778 /* PC hardware initialisation */
779 static void pc_init1(ram_addr_t ram_size, int vga_ram_size,
780 const char *boot_device,
781 const char *kernel_filename, const char *kernel_cmdline,
782 const char *initrd_filename,
783 int pci_enabled, const char *cpu_model)
786 int ret, linux_boot, i;
787 ram_addr_t ram_addr, vga_ram_addr, bios_offset, option_rom_offset;
788 ram_addr_t below_4g_mem_size, above_4g_mem_size = 0;
789 int bios_size, isa_bios_size, oprom_area_size;
791 int piix3_devfn = -1;
796 BlockDriverState *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
797 BlockDriverState *fd[MAX_FD];
798 int using_vga = cirrus_vga_enabled || std_vga_enabled || vmsvga_enabled;
800 if (ram_size >= 0xe0000000 ) {
801 above_4g_mem_size = ram_size - 0xe0000000;
802 below_4g_mem_size = 0xe0000000;
804 below_4g_mem_size = ram_size;
807 linux_boot = (kernel_filename != NULL);
810 if (cpu_model == NULL) {
812 cpu_model = "qemu64";
814 cpu_model = "qemu32";
818 for(i = 0; i < smp_cpus; i++) {
819 env = cpu_init(cpu_model);
821 fprintf(stderr, "Unable to find x86 CPU definition\n");
827 /* XXX: enable it in all cases */
828 env->cpuid_features |= CPUID_APIC;
830 qemu_register_reset(main_cpu_reset, env);
839 ram_addr = qemu_ram_alloc(0xa0000);
840 cpu_register_physical_memory(0, 0xa0000, ram_addr);
842 /* Allocate, even though we won't register, so we don't break the
843 * phys_ram_base + PA assumption. This range includes vga (0xa0000 - 0xc0000),
844 * and some bios areas, which will be registered later
846 ram_addr = qemu_ram_alloc(0x100000 - 0xa0000);
847 ram_addr = qemu_ram_alloc(below_4g_mem_size - 0x100000);
848 cpu_register_physical_memory(0x100000,
849 below_4g_mem_size - 0x100000,
852 /* above 4giga memory allocation */
853 if (above_4g_mem_size > 0) {
854 ram_addr = qemu_ram_alloc(above_4g_mem_size);
855 cpu_register_physical_memory(0x100000000ULL,
861 /* allocate VGA RAM */
862 vga_ram_addr = qemu_ram_alloc(vga_ram_size);
865 if (bios_name == NULL)
866 bios_name = BIOS_FILENAME;
867 snprintf(buf, sizeof(buf), "%s/%s", bios_dir, bios_name);
868 bios_size = get_image_size(buf);
869 if (bios_size <= 0 ||
870 (bios_size % 65536) != 0) {
873 bios_offset = qemu_ram_alloc(bios_size);
874 ret = load_image(buf, qemu_get_ram_ptr(bios_offset));
875 if (ret != bios_size) {
877 fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", buf);
880 /* map the last 128KB of the BIOS in ISA space */
881 isa_bios_size = bios_size;
882 if (isa_bios_size > (128 * 1024))
883 isa_bios_size = 128 * 1024;
884 cpu_register_physical_memory(0x100000 - isa_bios_size,
886 (bios_offset + bios_size - isa_bios_size) | IO_MEM_ROM);
890 option_rom_offset = qemu_ram_alloc(0x20000);
892 cpu_register_physical_memory(0xc0000, 0x20000,
893 option_rom_offset | IO_MEM_ROM);
897 if (cirrus_vga_enabled) {
898 snprintf(buf, sizeof(buf), "%s/%s", bios_dir,
899 VGABIOS_CIRRUS_FILENAME);
901 snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_FILENAME);
903 oprom_area_size = load_option_rom(buf, 0xc0000, 0xe0000);
905 /* Although video roms can grow larger than 0x8000, the area between
906 * 0xc0000 - 0xc8000 is reserved for them. It means we won't be looking
907 * for any other kind of option rom inside this area */
908 if (oprom_area_size < 0x8000)
909 oprom_area_size = 0x8000;
912 load_linux(0xc0000 + oprom_area_size,
913 kernel_filename, initrd_filename, kernel_cmdline);
914 oprom_area_size += 2048;
917 for (i = 0; i < nb_option_roms; i++) {
918 oprom_area_size += load_option_rom(option_rom[i],
919 0xc0000 + oprom_area_size, 0xe0000);
922 /* map all the bios at the top of memory */
923 cpu_register_physical_memory((uint32_t)(-bios_size),
924 bios_size, bios_offset | IO_MEM_ROM);
928 cpu_irq = qemu_allocate_irqs(pic_irq_request, NULL, 1);
929 i8259 = i8259_init(cpu_irq[0]);
930 ferr_irq = i8259[13];
933 pci_bus = i440fx_init(&i440fx_state, i8259);
934 piix3_devfn = piix3_init(pci_bus, -1);
939 /* init basic PC hardware */
940 register_ioport_write(0x80, 1, 1, ioport80_write, NULL);
942 register_ioport_write(0xf0, 1, 1, ioportF0_write, NULL);
944 if (cirrus_vga_enabled) {
946 pci_cirrus_vga_init(pci_bus,
947 phys_ram_base + vga_ram_addr,
948 vga_ram_addr, vga_ram_size);
950 isa_cirrus_vga_init(phys_ram_base + vga_ram_addr,
951 vga_ram_addr, vga_ram_size);
953 } else if (vmsvga_enabled) {
955 pci_vmsvga_init(pci_bus, phys_ram_base + vga_ram_addr,
956 vga_ram_addr, vga_ram_size);
958 fprintf(stderr, "%s: vmware_vga: no PCI bus\n", __FUNCTION__);
959 } else if (std_vga_enabled) {
961 pci_vga_init(pci_bus, phys_ram_base + vga_ram_addr,
962 vga_ram_addr, vga_ram_size, 0, 0);
964 isa_vga_init(phys_ram_base + vga_ram_addr,
965 vga_ram_addr, vga_ram_size);
969 rtc_state = rtc_init(0x70, i8259[8], 2000);
971 qemu_register_boot_set(pc_boot_set, rtc_state);
973 register_ioport_read(0x92, 1, 1, ioport92_read, NULL);
974 register_ioport_write(0x92, 1, 1, ioport92_write, NULL);
977 ioapic = ioapic_init();
979 pit = pit_init(0x40, i8259[0]);
985 pic_set_alt_irq_func(isa_pic, ioapic_set_irq, ioapic);
988 for(i = 0; i < MAX_SERIAL_PORTS; i++) {
990 serial_init(serial_io[i], i8259[serial_irq[i]], 115200,
995 for(i = 0; i < MAX_PARALLEL_PORTS; i++) {
996 if (parallel_hds[i]) {
997 parallel_init(parallel_io[i], i8259[parallel_irq[i]],
1002 for(i = 0; i < nb_nics; i++) {
1003 NICInfo *nd = &nd_table[i];
1005 if (!pci_enabled || (nd->model && strcmp(nd->model, "ne2k_isa") == 0))
1006 pc_init_ne2k_isa(nd, i8259);
1008 pci_nic_init(pci_bus, nd, -1, "ne2k_pci");
1011 qemu_system_hot_add_init();
1013 if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
1014 fprintf(stderr, "qemu: too many IDE bus\n");
1018 for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
1019 index = drive_get_index(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
1021 hd[i] = drives_table[index].bdrv;
1027 pci_piix3_ide_init(pci_bus, hd, piix3_devfn + 1, i8259);
1029 for(i = 0; i < MAX_IDE_BUS; i++) {
1030 isa_ide_init(ide_iobase[i], ide_iobase2[i], i8259[ide_irq[i]],
1031 hd[MAX_IDE_DEVS * i], hd[MAX_IDE_DEVS * i + 1]);
1035 i8042_init(i8259[1], i8259[12], 0x60);
1038 audio_init(pci_enabled ? pci_bus : NULL, i8259);
1041 for(i = 0; i < MAX_FD; i++) {
1042 index = drive_get_index(IF_FLOPPY, 0, i);
1044 fd[i] = drives_table[index].bdrv;
1048 floppy_controller = fdctrl_init(i8259[6], 2, 0, 0x3f0, fd);
1050 cmos_init(below_4g_mem_size, above_4g_mem_size, boot_device, hd);
1052 if (pci_enabled && usb_enabled) {
1053 usb_uhci_piix3_init(pci_bus, piix3_devfn + 2);
1056 if (pci_enabled && acpi_enabled) {
1057 uint8_t *eeprom_buf = qemu_mallocz(8 * 256); /* XXX: make this persistent */
1060 /* TODO: Populate SPD eeprom data. */
1061 smbus = piix4_pm_init(pci_bus, piix3_devfn + 3, 0xb100, i8259[9]);
1062 for (i = 0; i < 8; i++) {
1063 smbus_eeprom_device_init(smbus, 0x50 + i, eeprom_buf + (i * 256));
1068 i440fx_init_memory_mappings(i440fx_state);
1076 max_bus = drive_get_max_bus(IF_SCSI);
1078 for (bus = 0; bus <= max_bus; bus++) {
1079 scsi = lsi_scsi_init(pci_bus, -1);
1080 for (unit = 0; unit < LSI_MAX_DEVS; unit++) {
1081 index = drive_get_index(IF_SCSI, bus, unit);
1084 lsi_scsi_attach(scsi, drives_table[index].bdrv, unit);
1089 /* Add virtio block devices */
1094 while ((index = drive_get_index(IF_VIRTIO, 0, unit_id)) != -1) {
1095 virtio_blk_init(pci_bus, drives_table[index].bdrv);
1100 /* Add virtio balloon device */
1102 virtio_balloon_init(pci_bus);
1104 /* Add virtio console devices */
1106 for(i = 0; i < MAX_VIRTIO_CONSOLES; i++) {
1108 virtio_console_init(pci_bus, virtcon_hds[i]);
1113 static void pc_init_pci(ram_addr_t ram_size, int vga_ram_size,
1114 const char *boot_device,
1115 const char *kernel_filename,
1116 const char *kernel_cmdline,
1117 const char *initrd_filename,
1118 const char *cpu_model)
1120 pc_init1(ram_size, vga_ram_size, boot_device,
1121 kernel_filename, kernel_cmdline,
1122 initrd_filename, 1, cpu_model);
1125 static void pc_init_isa(ram_addr_t ram_size, int vga_ram_size,
1126 const char *boot_device,
1127 const char *kernel_filename,
1128 const char *kernel_cmdline,
1129 const char *initrd_filename,
1130 const char *cpu_model)
1132 pc_init1(ram_size, vga_ram_size, boot_device,
1133 kernel_filename, kernel_cmdline,
1134 initrd_filename, 0, cpu_model);
1137 /* set CMOS shutdown status register (index 0xF) as S3_resume(0xFE)
1138 BIOS will read it and start S3 resume at POST Entry */
1139 void cmos_set_s3_resume(void)
1142 rtc_set_memory(rtc_state, 0xF, 0xFE);
1145 QEMUMachine pc_machine = {
1147 .desc = "Standard PC",
1148 .init = pc_init_pci,
1149 .ram_require = VGA_RAM_SIZE + PC_MAX_BIOS_SIZE,
1153 QEMUMachine isapc_machine = {
1155 .desc = "ISA-only PC",
1156 .init = pc_init_isa,
1157 .ram_require = VGA_RAM_SIZE + PC_MAX_BIOS_SIZE,