2 * QEMU PC System Emulator
4 * Copyright (c) 2003 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
42 #include <sys/ioctl.h>
43 #include <sys/socket.h>
45 #include <linux/if_tun.h>
53 #define DEBUG_LOGFILE "/tmp/vl.log"
54 #define DEFAULT_NETWORK_SCRIPT "/etc/vl-ifup"
56 //#define DEBUG_UNUSED_IOPORT
57 //#define DEBUG_IRQ_LATENCY
59 #define PHYS_RAM_BASE 0xac000000
60 #define PHYS_RAM_MAX_SIZE (256 * 1024 * 1024)
62 #define KERNEL_LOAD_ADDR 0x00100000
63 #define INITRD_LOAD_ADDR 0x00400000
64 #define KERNEL_PARAMS_ADDR 0x00090000
68 /* from plex86 (BSD license) */
69 struct __attribute__ ((packed)) linux_params {
70 // For 0x00..0x3f, see 'struct screen_info' in linux/include/linux/tty.h.
71 // I just padded out the VESA parts, rather than define them.
73 /* 0x000 */ uint8_t orig_x;
74 /* 0x001 */ uint8_t orig_y;
75 /* 0x002 */ uint16_t ext_mem_k;
76 /* 0x004 */ uint16_t orig_video_page;
77 /* 0x006 */ uint8_t orig_video_mode;
78 /* 0x007 */ uint8_t orig_video_cols;
79 /* 0x008 */ uint16_t unused1;
80 /* 0x00a */ uint16_t orig_video_ega_bx;
81 /* 0x00c */ uint16_t unused2;
82 /* 0x00e */ uint8_t orig_video_lines;
83 /* 0x00f */ uint8_t orig_video_isVGA;
84 /* 0x010 */ uint16_t orig_video_points;
85 /* 0x012 */ uint8_t pad0[0x20 - 0x12]; // VESA info.
86 /* 0x020 */ uint16_t cl_magic; // Commandline magic number (0xA33F)
87 /* 0x022 */ uint16_t cl_offset; // Commandline offset. Address of commandline
88 // is calculated as 0x90000 + cl_offset, bu
89 // only if cl_magic == 0xA33F.
90 /* 0x024 */ uint8_t pad1[0x40 - 0x24]; // VESA info.
92 /* 0x040 */ uint8_t apm_bios_info[20]; // struct apm_bios_info
93 /* 0x054 */ uint8_t pad2[0x80 - 0x54];
95 // Following 2 from 'struct drive_info_struct' in drivers/block/cciss.h.
96 // Might be truncated?
97 /* 0x080 */ uint8_t hd0_info[16]; // hd0-disk-parameter from intvector 0x41
98 /* 0x090 */ uint8_t hd1_info[16]; // hd1-disk-parameter from intvector 0x46
100 // System description table truncated to 16 bytes
101 // From 'struct sys_desc_table_struct' in linux/arch/i386/kernel/setup.c.
102 /* 0x0a0 */ uint16_t sys_description_len;
103 /* 0x0a2 */ uint8_t sys_description_table[14];
105 // [1] machine submodel id
109 /* 0x0b0 */ uint8_t pad3[0x1e0 - 0xb0];
110 /* 0x1e0 */ uint32_t alt_mem_k;
111 /* 0x1e4 */ uint8_t pad4[4];
112 /* 0x1e8 */ uint8_t e820map_entries;
113 /* 0x1e9 */ uint8_t eddbuf_entries; // EDD_NR
114 /* 0x1ea */ uint8_t pad5[0x1f1 - 0x1ea];
115 /* 0x1f1 */ uint8_t setup_sects; // size of setup.S, number of sectors
116 /* 0x1f2 */ uint16_t mount_root_rdonly; // MOUNT_ROOT_RDONLY (if !=0)
117 /* 0x1f4 */ uint16_t sys_size; // size of compressed kernel-part in the
118 // (b)zImage-file (in 16 byte units, rounded up)
119 /* 0x1f6 */ uint16_t swap_dev; // (unused AFAIK)
120 /* 0x1f8 */ uint16_t ramdisk_flags;
121 /* 0x1fa */ uint16_t vga_mode; // (old one)
122 /* 0x1fc */ uint16_t orig_root_dev; // (high=Major, low=minor)
123 /* 0x1fe */ uint8_t pad6[1];
124 /* 0x1ff */ uint8_t aux_device_info;
125 /* 0x200 */ uint16_t jump_setup; // Jump to start of setup code,
126 // aka "reserved" field.
127 /* 0x202 */ uint8_t setup_signature[4]; // Signature for SETUP-header, ="HdrS"
128 /* 0x206 */ uint16_t header_format_version; // Version number of header format;
129 /* 0x208 */ uint8_t setup_S_temp0[8]; // Used by setup.S for communication with
130 // boot loaders, look there.
131 /* 0x210 */ uint8_t loader_type;
136 // T=2: bootsect-loader
140 /* 0x211 */ uint8_t loadflags;
141 // bit0 = 1: kernel is loaded high (bzImage)
142 // bit7 = 1: Heap and pointer (see below) set by boot
144 /* 0x212 */ uint16_t setup_S_temp1;
145 /* 0x214 */ uint32_t kernel_start;
146 /* 0x218 */ uint32_t initrd_start;
147 /* 0x21c */ uint32_t initrd_size;
148 /* 0x220 */ uint8_t setup_S_temp2[4];
149 /* 0x224 */ uint16_t setup_S_heap_end_pointer;
150 /* 0x226 */ uint8_t pad7[0x2d0 - 0x226];
152 /* 0x2d0 : Int 15, ax=e820 memory map. */
153 // (linux/include/asm-i386/e820.h, 'struct e820entry')
156 #define E820_RESERVED 2
157 #define E820_ACPI 3 /* usable as RAM once ACPI tables have been read */
165 /* 0x550 */ uint8_t pad8[0x600 - 0x550];
167 // BIOS Enhanced Disk Drive Services.
168 // (From linux/include/asm-i386/edd.h, 'struct edd_info')
169 // Each 'struct edd_info is 78 bytes, times a max of 6 structs in array.
170 /* 0x600 */ uint8_t eddbuf[0x7d4 - 0x600];
172 /* 0x7d4 */ uint8_t pad9[0x800 - 0x7d4];
173 /* 0x800 */ uint8_t commandline[0x800];
176 uint64_t gdt_table[256];
177 uint64_t idt_table[48];
180 #define KERNEL_CS 0x10
181 #define KERNEL_DS 0x18
183 typedef void (IOPortWriteFunc)(CPUX86State *env, uint32_t address, uint32_t data);
184 typedef uint32_t (IOPortReadFunc)(CPUX86State *env, uint32_t address);
186 #define MAX_IOPORTS 4096
188 char phys_ram_file[1024];
189 CPUX86State *global_env;
190 CPUX86State *cpu_single_env;
191 FILE *logfile = NULL;
193 IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS];
194 IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS];
195 BlockDriverState *bs_table[MAX_DISKS];
197 /***********************************************************/
200 uint32_t default_ioport_readb(CPUX86State *env, uint32_t address)
202 #ifdef DEBUG_UNUSED_IOPORT
203 fprintf(stderr, "inb: port=0x%04x\n", address);
208 void default_ioport_writeb(CPUX86State *env, uint32_t address, uint32_t data)
210 #ifdef DEBUG_UNUSED_IOPORT
211 fprintf(stderr, "outb: port=0x%04x data=0x%02x\n", address, data);
215 /* default is to make two byte accesses */
216 uint32_t default_ioport_readw(CPUX86State *env, uint32_t address)
219 data = ioport_read_table[0][address](env, address);
220 data |= ioport_read_table[0][address + 1](env, address + 1) << 8;
224 void default_ioport_writew(CPUX86State *env, uint32_t address, uint32_t data)
226 ioport_write_table[0][address](env, address, data & 0xff);
227 ioport_write_table[0][address + 1](env, address + 1, (data >> 8) & 0xff);
230 uint32_t default_ioport_readl(CPUX86State *env, uint32_t address)
232 #ifdef DEBUG_UNUSED_IOPORT
233 fprintf(stderr, "inl: port=0x%04x\n", address);
238 void default_ioport_writel(CPUX86State *env, uint32_t address, uint32_t data)
240 #ifdef DEBUG_UNUSED_IOPORT
241 fprintf(stderr, "outl: port=0x%04x data=0x%02x\n", address, data);
245 void init_ioports(void)
249 for(i = 0; i < MAX_IOPORTS; i++) {
250 ioport_read_table[0][i] = default_ioport_readb;
251 ioport_write_table[0][i] = default_ioport_writeb;
252 ioport_read_table[1][i] = default_ioport_readw;
253 ioport_write_table[1][i] = default_ioport_writew;
254 ioport_read_table[2][i] = default_ioport_readl;
255 ioport_write_table[2][i] = default_ioport_writel;
259 /* size is the word size in byte */
260 int register_ioport_read(int start, int length, IOPortReadFunc *func, int size)
272 for(i = start; i < start + length; i += size)
273 ioport_read_table[bsize][i] = func;
277 /* size is the word size in byte */
278 int register_ioport_write(int start, int length, IOPortWriteFunc *func, int size)
290 for(i = start; i < start + length; i += size)
291 ioport_write_table[bsize][i] = func;
295 void pstrcpy(char *buf, int buf_size, const char *str)
305 if (c == 0 || q >= buf + buf_size - 1)
312 /* strcat and truncate. */
313 char *pstrcat(char *buf, int buf_size, const char *s)
318 pstrcpy(buf + len, buf_size - len, s);
322 int load_kernel(const char *filename, uint8_t *addr)
324 int fd, size, setup_sects;
325 uint8_t bootsect[512];
327 fd = open(filename, O_RDONLY);
330 if (read(fd, bootsect, 512) != 512)
332 setup_sects = bootsect[0x1F1];
335 /* skip 16 bit setup code */
336 lseek(fd, (setup_sects + 1) * 512, SEEK_SET);
337 size = read(fd, addr, 16 * 1024 * 1024);
347 /* return the size or -1 if error */
348 int load_image(const char *filename, uint8_t *addr)
351 fd = open(filename, O_RDONLY);
354 size = lseek(fd, 0, SEEK_END);
355 lseek(fd, 0, SEEK_SET);
356 if (read(fd, addr, size) != size) {
364 void cpu_x86_outb(CPUX86State *env, int addr, int val)
366 ioport_write_table[0][addr & (MAX_IOPORTS - 1)](env, addr, val);
369 void cpu_x86_outw(CPUX86State *env, int addr, int val)
371 ioport_write_table[1][addr & (MAX_IOPORTS - 1)](env, addr, val);
374 void cpu_x86_outl(CPUX86State *env, int addr, int val)
376 ioport_write_table[2][addr & (MAX_IOPORTS - 1)](env, addr, val);
379 int cpu_x86_inb(CPUX86State *env, int addr)
381 return ioport_read_table[0][addr & (MAX_IOPORTS - 1)](env, addr);
384 int cpu_x86_inw(CPUX86State *env, int addr)
386 return ioport_read_table[1][addr & (MAX_IOPORTS - 1)](env, addr);
389 int cpu_x86_inl(CPUX86State *env, int addr)
391 return ioport_read_table[2][addr & (MAX_IOPORTS - 1)](env, addr);
394 /***********************************************************/
395 void ioport80_write(CPUX86State *env, uint32_t addr, uint32_t data)
399 void hw_error(const char *fmt, ...)
404 fprintf(stderr, "qemu: hardware error: ");
405 vfprintf(stderr, fmt, ap);
406 fprintf(stderr, "\n");
408 cpu_x86_dump_state(global_env, stderr, X86_DUMP_FPU | X86_DUMP_CCOP);
414 /***********************************************************/
416 static uint8_t vga_index;
417 static uint8_t vga_regs[256];
418 static int last_cursor_pos;
420 void update_console_messages(void)
422 int c, i, cursor_pos, eol;
424 cursor_pos = vga_regs[0x0f] | (vga_regs[0x0e] << 8);
426 for(i = last_cursor_pos; i < cursor_pos; i++) {
427 c = phys_ram_base[0xb8000 + (i) * 2];
438 last_cursor_pos = cursor_pos;
441 /* just to see first Linux console messages, we intercept cursor position */
442 void vga_ioport_write(CPUX86State *env, uint32_t addr, uint32_t data)
449 vga_regs[vga_index] = data;
450 if (vga_index == 0x0f)
451 update_console_messages();
457 /***********************************************************/
460 #define RTC_SECONDS 0
461 #define RTC_SECONDS_ALARM 1
462 #define RTC_MINUTES 2
463 #define RTC_MINUTES_ALARM 3
465 #define RTC_HOURS_ALARM 5
466 #define RTC_ALARM_DONT_CARE 0xC0
468 #define RTC_DAY_OF_WEEK 6
469 #define RTC_DAY_OF_MONTH 7
478 /* PC cmos mappings */
479 #define REG_EQUIPMENT_BYTE 0x14
481 uint8_t cmos_data[128];
484 void cmos_ioport_write(CPUX86State *env, uint32_t addr, uint32_t data)
487 cmos_index = data & 0x7f;
491 uint32_t cmos_ioport_read(CPUX86State *env, uint32_t addr)
498 /* toggle update-in-progress bit for Linux (same hack as
500 ret = cmos_data[cmos_index];
501 if (cmos_index == RTC_REG_A)
502 cmos_data[RTC_REG_A] ^= 0x80;
503 else if (cmos_index == RTC_REG_C)
504 cmos_data[RTC_REG_C] = 0x00;
510 static inline int to_bcd(int a)
512 return ((a / 10) << 4) | (a % 10);
522 cmos_data[RTC_SECONDS] = to_bcd(tm->tm_sec);
523 cmos_data[RTC_MINUTES] = to_bcd(tm->tm_min);
524 cmos_data[RTC_HOURS] = to_bcd(tm->tm_hour);
525 cmos_data[RTC_DAY_OF_WEEK] = to_bcd(tm->tm_wday);
526 cmos_data[RTC_DAY_OF_MONTH] = to_bcd(tm->tm_mday);
527 cmos_data[RTC_MONTH] = to_bcd(tm->tm_mon + 1);
528 cmos_data[RTC_YEAR] = to_bcd(tm->tm_year % 100);
530 cmos_data[RTC_REG_A] = 0x26;
531 cmos_data[RTC_REG_B] = 0x02;
532 cmos_data[RTC_REG_C] = 0x00;
533 cmos_data[RTC_REG_D] = 0x80;
535 cmos_data[REG_EQUIPMENT_BYTE] = 0x02; /* FPU is there */
537 register_ioport_write(0x70, 2, cmos_ioport_write, 1);
538 register_ioport_read(0x70, 2, cmos_ioport_read, 1);
541 /***********************************************************/
542 /* 8259 pic emulation */
546 typedef struct PicState {
547 uint8_t last_irr; /* edge detection */
548 uint8_t irr; /* interrupt request register */
549 uint8_t imr; /* interrupt mask register */
550 uint8_t isr; /* interrupt service register */
551 uint8_t priority_add; /* used to compute irq priority */
553 uint8_t read_reg_select;
554 uint8_t special_mask;
557 uint8_t rotate_on_autoeoi;
558 uint8_t init4; /* true if 4 byte init */
561 /* 0 is master pic, 1 is slave pic */
563 int pic_irq_requested;
565 /* set irq level. If an edge is detected, then the IRR is set to 1 */
566 static inline void pic_set_irq1(PicState *s, int irq, int level)
571 if ((s->last_irr & mask) == 0)
575 s->last_irr &= ~mask;
579 static inline int get_priority(PicState *s, int mask)
585 while ((mask & (1 << ((priority + s->priority_add) & 7))) == 0)
590 /* return the pic wanted interrupt. return -1 if none */
591 static int pic_get_irq(PicState *s)
593 int mask, cur_priority, priority;
595 mask = s->irr & ~s->imr;
596 priority = get_priority(s, mask);
599 /* compute current priority */
600 cur_priority = get_priority(s, s->isr);
601 if (priority > cur_priority) {
602 /* higher priority found: an irq should be generated */
609 /* raise irq to CPU if necessary. must be called every time the active
611 static void pic_update_irq(void)
615 /* first look at slave pic */
616 irq2 = pic_get_irq(&pics[1]);
618 /* if irq request by slave pic, signal master PIC */
619 pic_set_irq1(&pics[0], 2, 1);
620 pic_set_irq1(&pics[0], 2, 0);
622 /* look at requested irq */
623 irq = pic_get_irq(&pics[0]);
627 pic_irq_requested = 8 + irq2;
629 /* from master pic */
630 pic_irq_requested = irq;
632 cpu_x86_interrupt(global_env, CPU_INTERRUPT_HARD);
636 #ifdef DEBUG_IRQ_LATENCY
637 int64_t irq_time[16];
638 int64_t cpu_get_ticks(void);
644 void pic_set_irq(int irq, int level)
647 if (level != irq_level[irq]) {
648 printf("pic_set_irq: irq=%d level=%d\n", irq, level);
649 irq_level[irq] = level;
652 #ifdef DEBUG_IRQ_LATENCY
654 irq_time[irq] = cpu_get_ticks();
657 pic_set_irq1(&pics[irq >> 3], irq & 7, level);
661 int cpu_x86_get_pic_interrupt(CPUX86State *env)
663 int irq, irq2, intno;
665 /* signal the pic that the irq was acked by the CPU */
666 irq = pic_irq_requested;
667 #ifdef DEBUG_IRQ_LATENCY
668 printf("IRQ%d latency=%Ld\n", irq, cpu_get_ticks() - irq_time[irq]);
671 printf("pic_interrupt: irq=%d\n", irq);
676 pics[1].isr |= (1 << irq2);
677 pics[1].irr &= ~(1 << irq2);
679 intno = pics[1].irq_base + irq2;
681 intno = pics[0].irq_base + irq;
683 pics[0].isr |= (1 << irq);
684 pics[0].irr &= ~(1 << irq);
688 void pic_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
694 printf("pic_write: addr=0x%02x val=0x%02x\n", addr, val);
696 s = &pics[addr >> 7];
701 memset(s, 0, sizeof(PicState));
705 hw_error("single mode not supported");
707 hw_error("level sensitive irq not supported");
708 } else if (val & 0x08) {
710 s->read_reg_select = val & 1;
712 s->special_mask = (val >> 5) & 1;
717 s->rotate_on_autoeoi = val >> 7;
719 case 0x20: /* end of interrupt */
721 priority = get_priority(s, s->isr);
723 s->isr &= ~(1 << ((priority + s->priority_add) & 7));
726 s->priority_add = (s->priority_add + 1) & 7;
730 s->isr &= ~(1 << priority);
733 s->priority_add = (val + 1) & 7;
737 s->isr &= ~(1 << priority);
738 s->priority_add = (priority + 1) & 7;
743 switch(s->init_state) {
750 s->irq_base = val & 0xf8;
761 s->auto_eoi = (val >> 1) & 1;
768 uint32_t pic_ioport_read(CPUX86State *env, uint32_t addr1)
775 s = &pics[addr >> 7];
778 if (s->read_reg_select)
786 printf("pic_read: addr=0x%02x val=0x%02x\n", addr1, ret);
793 register_ioport_write(0x20, 2, pic_ioport_write, 1);
794 register_ioport_read(0x20, 2, pic_ioport_read, 1);
795 register_ioport_write(0xa0, 2, pic_ioport_write, 1);
796 register_ioport_read(0xa0, 2, pic_ioport_read, 1);
799 /***********************************************************/
800 /* 8253 PIT emulation */
802 #define PIT_FREQ 1193182
804 #define RW_STATE_LSB 0
805 #define RW_STATE_MSB 1
806 #define RW_STATE_WORD0 2
807 #define RW_STATE_WORD1 3
808 #define RW_STATE_LATCHED_WORD0 4
809 #define RW_STATE_LATCHED_WORD1 5
811 typedef struct PITChannelState {
812 int count; /* can be 65536 */
813 uint16_t latched_count;
816 uint8_t bcd; /* not supported */
817 uint8_t gate; /* timer start */
818 int64_t count_load_time;
819 int64_t count_last_edge_check_time;
822 PITChannelState pit_channels[3];
824 int pit_min_timer_count = 0;
826 int64_t ticks_per_sec;
828 int64_t get_clock(void)
831 gettimeofday(&tv, NULL);
832 return tv.tv_sec * 1000000LL + tv.tv_usec;
835 int64_t cpu_get_ticks(void)
838 asm("rdtsc" : "=A" (val));
842 void cpu_calibrate_ticks(void)
847 ticks = cpu_get_ticks();
849 usec = get_clock() - usec;
850 ticks = cpu_get_ticks() - ticks;
851 ticks_per_sec = (ticks * 1000000LL + (usec >> 1)) / usec;
854 /* compute with 96 bit intermediate result: (a*b)/c */
855 static uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
860 #ifdef WORDS_BIGENDIAN
870 rl = (uint64_t)u.l.low * (uint64_t)b;
871 rh = (uint64_t)u.l.high * (uint64_t)b;
874 res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c;
878 static int pit_get_count(PITChannelState *s)
883 d = muldiv64(cpu_get_ticks() - s->count_load_time, PIT_FREQ, ticks_per_sec);
889 counter = (s->count - d) & 0xffff;
892 counter = s->count - (d % s->count);
898 /* get pit output bit */
899 static int pit_get_out(PITChannelState *s)
904 d = muldiv64(cpu_get_ticks() - s->count_load_time, PIT_FREQ, ticks_per_sec);
908 out = (d >= s->count);
911 out = (d < s->count);
914 if ((d % s->count) == 0 && d != 0)
920 out = (d % s->count) < (s->count >> 1);
924 out = (d == s->count);
930 /* get the number of 0 to 1 transitions we had since we call this
932 /* XXX: maybe better to use ticks precision to avoid getting edges
933 twice if checks are done at very small intervals */
934 static int pit_get_out_edges(PITChannelState *s)
940 ticks = cpu_get_ticks();
941 d1 = muldiv64(s->count_last_edge_check_time - s->count_load_time,
942 PIT_FREQ, ticks_per_sec);
943 d2 = muldiv64(ticks - s->count_load_time,
944 PIT_FREQ, ticks_per_sec);
945 s->count_last_edge_check_time = ticks;
949 if (d1 < s->count && d2 >= s->count)
963 v = s->count - (s->count >> 1);
964 d1 = (d1 + v) / s->count;
965 d2 = (d2 + v) / s->count;
970 if (d1 < s->count && d2 >= s->count)
979 static inline void pit_load_count(PITChannelState *s, int val)
983 s->count_load_time = cpu_get_ticks();
984 s->count_last_edge_check_time = s->count_load_time;
986 if (s == &pit_channels[0] && val <= pit_min_timer_count) {
988 "\nWARNING: vl: on your system, accurate timer emulation is impossible if its frequency is more than %d Hz. If using a 2.5.xx Linux kernel, you must patch asm/param.h to change HZ from 1000 to 100.\n\n",
989 PIT_FREQ / pit_min_timer_count);
993 void pit_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
1003 s = &pit_channels[channel];
1004 access = (val >> 4) & 3;
1007 s->latched_count = pit_get_count(s);
1008 s->rw_state = RW_STATE_LATCHED_WORD0;
1011 s->mode = (val >> 1) & 7;
1013 s->rw_state = access - 1 + RW_STATE_LSB;
1017 s = &pit_channels[addr];
1018 switch(s->rw_state) {
1020 pit_load_count(s, val);
1023 pit_load_count(s, val << 8);
1025 case RW_STATE_WORD0:
1026 case RW_STATE_WORD1:
1027 if (s->rw_state & 1) {
1028 pit_load_count(s, (s->latched_count & 0xff) | (val << 8));
1030 s->latched_count = val;
1038 uint32_t pit_ioport_read(CPUX86State *env, uint32_t addr)
1044 s = &pit_channels[addr];
1045 switch(s->rw_state) {
1048 case RW_STATE_WORD0:
1049 case RW_STATE_WORD1:
1050 count = pit_get_count(s);
1051 if (s->rw_state & 1)
1052 ret = (count >> 8) & 0xff;
1055 if (s->rw_state & 2)
1059 case RW_STATE_LATCHED_WORD0:
1060 case RW_STATE_LATCHED_WORD1:
1061 if (s->rw_state & 1)
1062 ret = s->latched_count >> 8;
1064 ret = s->latched_count & 0xff;
1071 void speaker_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
1073 speaker_data_on = (val >> 1) & 1;
1074 pit_channels[2].gate = val & 1;
1077 uint32_t speaker_ioport_read(CPUX86State *env, uint32_t addr)
1080 out = pit_get_out(&pit_channels[2]);
1081 return (speaker_data_on << 1) | pit_channels[2].gate | (out << 5);
1089 cpu_calibrate_ticks();
1091 for(i = 0;i < 3; i++) {
1092 s = &pit_channels[i];
1095 pit_load_count(s, 0);
1098 register_ioport_write(0x40, 4, pit_ioport_write, 1);
1099 register_ioport_read(0x40, 3, pit_ioport_read, 1);
1101 register_ioport_read(0x61, 1, speaker_ioport_read, 1);
1102 register_ioport_write(0x61, 1, speaker_ioport_write, 1);
1105 /***********************************************************/
1106 /* serial port emulation */
1110 #define UART_LCR_DLAB 0x80 /* Divisor latch access bit */
1112 #define UART_IER_MSI 0x08 /* Enable Modem status interrupt */
1113 #define UART_IER_RLSI 0x04 /* Enable receiver line status interrupt */
1114 #define UART_IER_THRI 0x02 /* Enable Transmitter holding register int. */
1115 #define UART_IER_RDI 0x01 /* Enable receiver data interrupt */
1117 #define UART_IIR_NO_INT 0x01 /* No interrupts pending */
1118 #define UART_IIR_ID 0x06 /* Mask for the interrupt ID */
1120 #define UART_IIR_MSI 0x00 /* Modem status interrupt */
1121 #define UART_IIR_THRI 0x02 /* Transmitter holding register empty */
1122 #define UART_IIR_RDI 0x04 /* Receiver data interrupt */
1123 #define UART_IIR_RLSI 0x06 /* Receiver line status interrupt */
1125 #define UART_LSR_TEMT 0x40 /* Transmitter empty */
1126 #define UART_LSR_THRE 0x20 /* Transmit-hold-register empty */
1127 #define UART_LSR_BI 0x10 /* Break interrupt indicator */
1128 #define UART_LSR_FE 0x08 /* Frame error indicator */
1129 #define UART_LSR_PE 0x04 /* Parity error indicator */
1130 #define UART_LSR_OE 0x02 /* Overrun error indicator */
1131 #define UART_LSR_DR 0x01 /* Receiver data ready */
1133 typedef struct SerialState {
1135 uint8_t rbr; /* receive register */
1137 uint8_t iir; /* read only */
1140 uint8_t lsr; /* read only */
1145 SerialState serial_ports[1];
1147 void serial_update_irq(void)
1149 SerialState *s = &serial_ports[0];
1151 if ((s->lsr & UART_LSR_DR) && (s->ier & UART_IER_RDI)) {
1152 s->iir = UART_IIR_RDI;
1153 } else if ((s->lsr & UART_LSR_THRE) && (s->ier & UART_IER_THRI)) {
1154 s->iir = UART_IIR_THRI;
1156 s->iir = UART_IIR_NO_INT;
1158 if (s->iir != UART_IIR_NO_INT) {
1159 pic_set_irq(UART_IRQ, 1);
1161 pic_set_irq(UART_IRQ, 0);
1165 void serial_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
1167 SerialState *s = &serial_ports[0];
1175 if (s->lcr & UART_LCR_DLAB) {
1176 s->divider = (s->divider & 0xff00) | val;
1178 s->lsr &= ~UART_LSR_THRE;
1179 serial_update_irq();
1183 ret = write(1, &ch, 1);
1185 s->lsr |= UART_LSR_THRE;
1186 s->lsr |= UART_LSR_TEMT;
1187 serial_update_irq();
1191 if (s->lcr & UART_LCR_DLAB) {
1192 s->divider = (s->divider & 0x00ff) | (val << 8);
1195 serial_update_irq();
1217 uint32_t serial_ioport_read(CPUX86State *env, uint32_t addr)
1219 SerialState *s = &serial_ports[0];
1226 if (s->lcr & UART_LCR_DLAB) {
1227 ret = s->divider & 0xff;
1230 s->lsr &= ~(UART_LSR_DR | UART_LSR_BI);
1231 serial_update_irq();
1235 if (s->lcr & UART_LCR_DLAB) {
1236 ret = (s->divider >> 8) & 0xff;
1263 #define TERM_ESCAPE 0x01 /* ctrl-a is used for escape */
1264 static int term_got_escape;
1266 void term_print_help(void)
1269 "C-a h print this help\n"
1270 "C-a x exit emulatior\n"
1271 "C-a s save disk data back to file (if -snapshot)\n"
1272 "C-a b send break (magic sysrq)\n"
1273 "C-a C-a send C-a\n"
1277 /* called when a char is received */
1278 void serial_received_byte(SerialState *s, int ch)
1280 if (term_got_escape) {
1281 term_got_escape = 0;
1292 for (i = 0; i < MAX_DISKS; i++) {
1294 bdrv_commit(bs_table[i]);
1301 s->lsr |= UART_LSR_BI | UART_LSR_DR;
1302 serial_update_irq();
1307 } else if (ch == TERM_ESCAPE) {
1308 term_got_escape = 1;
1312 s->lsr |= UART_LSR_DR;
1313 serial_update_irq();
1317 /* init terminal so that we can grab keys */
1318 static struct termios oldtty;
1320 static void term_exit(void)
1322 tcsetattr (0, TCSANOW, &oldtty);
1325 static void term_init(void)
1329 tcgetattr (0, &tty);
1332 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1333 |INLCR|IGNCR|ICRNL|IXON);
1334 tty.c_oflag |= OPOST;
1335 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1336 tty.c_cflag &= ~(CSIZE|PARENB);
1339 tty.c_cc[VTIME] = 0;
1341 tcsetattr (0, TCSANOW, &tty);
1345 fcntl(0, F_SETFL, O_NONBLOCK);
1348 void serial_init(void)
1350 SerialState *s = &serial_ports[0];
1352 s->lsr = UART_LSR_TEMT | UART_LSR_THRE;
1354 register_ioport_write(0x3f8, 8, serial_ioport_write, 1);
1355 register_ioport_read(0x3f8, 8, serial_ioport_read, 1);
1360 /***********************************************************/
1361 /* ne2000 emulation */
1363 //#define DEBUG_NE2000
1365 #define NE2000_IOPORT 0x300
1366 #define NE2000_IRQ 9
1368 #define MAX_ETH_FRAME_SIZE 1514
1370 #define E8390_CMD 0x00 /* The command register (for all pages) */
1371 /* Page 0 register offsets. */
1372 #define EN0_CLDALO 0x01 /* Low byte of current local dma addr RD */
1373 #define EN0_STARTPG 0x01 /* Starting page of ring bfr WR */
1374 #define EN0_CLDAHI 0x02 /* High byte of current local dma addr RD */
1375 #define EN0_STOPPG 0x02 /* Ending page +1 of ring bfr WR */
1376 #define EN0_BOUNDARY 0x03 /* Boundary page of ring bfr RD WR */
1377 #define EN0_TSR 0x04 /* Transmit status reg RD */
1378 #define EN0_TPSR 0x04 /* Transmit starting page WR */
1379 #define EN0_NCR 0x05 /* Number of collision reg RD */
1380 #define EN0_TCNTLO 0x05 /* Low byte of tx byte count WR */
1381 #define EN0_FIFO 0x06 /* FIFO RD */
1382 #define EN0_TCNTHI 0x06 /* High byte of tx byte count WR */
1383 #define EN0_ISR 0x07 /* Interrupt status reg RD WR */
1384 #define EN0_CRDALO 0x08 /* low byte of current remote dma address RD */
1385 #define EN0_RSARLO 0x08 /* Remote start address reg 0 */
1386 #define EN0_CRDAHI 0x09 /* high byte, current remote dma address RD */
1387 #define EN0_RSARHI 0x09 /* Remote start address reg 1 */
1388 #define EN0_RCNTLO 0x0a /* Remote byte count reg WR */
1389 #define EN0_RCNTHI 0x0b /* Remote byte count reg WR */
1390 #define EN0_RSR 0x0c /* rx status reg RD */
1391 #define EN0_RXCR 0x0c /* RX configuration reg WR */
1392 #define EN0_TXCR 0x0d /* TX configuration reg WR */
1393 #define EN0_COUNTER0 0x0d /* Rcv alignment error counter RD */
1394 #define EN0_DCFG 0x0e /* Data configuration reg WR */
1395 #define EN0_COUNTER1 0x0e /* Rcv CRC error counter RD */
1396 #define EN0_IMR 0x0f /* Interrupt mask reg WR */
1397 #define EN0_COUNTER2 0x0f /* Rcv missed frame error counter RD */
1399 #define EN1_PHYS 0x11
1400 #define EN1_CURPAG 0x17
1401 #define EN1_MULT 0x18
1403 /* Register accessed at EN_CMD, the 8390 base addr. */
1404 #define E8390_STOP 0x01 /* Stop and reset the chip */
1405 #define E8390_START 0x02 /* Start the chip, clear reset */
1406 #define E8390_TRANS 0x04 /* Transmit a frame */
1407 #define E8390_RREAD 0x08 /* Remote read */
1408 #define E8390_RWRITE 0x10 /* Remote write */
1409 #define E8390_NODMA 0x20 /* Remote DMA */
1410 #define E8390_PAGE0 0x00 /* Select page chip registers */
1411 #define E8390_PAGE1 0x40 /* using the two high-order bits */
1412 #define E8390_PAGE2 0x80 /* Page 3 is invalid. */
1414 /* Bits in EN0_ISR - Interrupt status register */
1415 #define ENISR_RX 0x01 /* Receiver, no error */
1416 #define ENISR_TX 0x02 /* Transmitter, no error */
1417 #define ENISR_RX_ERR 0x04 /* Receiver, with error */
1418 #define ENISR_TX_ERR 0x08 /* Transmitter, with error */
1419 #define ENISR_OVER 0x10 /* Receiver overwrote the ring */
1420 #define ENISR_COUNTERS 0x20 /* Counters need emptying */
1421 #define ENISR_RDC 0x40 /* remote dma complete */
1422 #define ENISR_RESET 0x80 /* Reset completed */
1423 #define ENISR_ALL 0x3f /* Interrupts we will enable */
1425 /* Bits in received packet status byte and EN0_RSR*/
1426 #define ENRSR_RXOK 0x01 /* Received a good packet */
1427 #define ENRSR_CRC 0x02 /* CRC error */
1428 #define ENRSR_FAE 0x04 /* frame alignment error */
1429 #define ENRSR_FO 0x08 /* FIFO overrun */
1430 #define ENRSR_MPA 0x10 /* missed pkt */
1431 #define ENRSR_PHY 0x20 /* physical/multicast address */
1432 #define ENRSR_DIS 0x40 /* receiver disable. set in monitor mode */
1433 #define ENRSR_DEF 0x80 /* deferring */
1435 /* Transmitted packet status, EN0_TSR. */
1436 #define ENTSR_PTX 0x01 /* Packet transmitted without error */
1437 #define ENTSR_ND 0x02 /* The transmit wasn't deferred. */
1438 #define ENTSR_COL 0x04 /* The transmit collided at least once. */
1439 #define ENTSR_ABT 0x08 /* The transmit collided 16 times, and was deferred. */
1440 #define ENTSR_CRS 0x10 /* The carrier sense was lost. */
1441 #define ENTSR_FU 0x20 /* A "FIFO underrun" occurred during transmit. */
1442 #define ENTSR_CDH 0x40 /* The collision detect "heartbeat" signal was lost. */
1443 #define ENTSR_OWC 0x80 /* There was an out-of-window collision. */
1445 #define NE2000_MEM_SIZE 32768
1447 typedef struct NE2000State {
1460 uint8_t phys[6]; /* mac address */
1462 uint8_t mult[8]; /* multicast mask array */
1463 uint8_t mem[NE2000_MEM_SIZE];
1466 NE2000State ne2000_state;
1468 char network_script[1024];
1470 void ne2000_reset(void)
1472 NE2000State *s = &ne2000_state;
1475 s->isr = ENISR_RESET;
1485 /* duplicate prom data */
1486 for(i = 15;i >= 0; i--) {
1487 s->mem[2 * i] = s->mem[i];
1488 s->mem[2 * i + 1] = s->mem[i];
1492 void ne2000_update_irq(NE2000State *s)
1495 isr = s->isr & s->imr;
1497 pic_set_irq(NE2000_IRQ, 1);
1499 pic_set_irq(NE2000_IRQ, 0);
1505 int fd, ret, pid, status;
1507 fd = open("/dev/net/tun", O_RDWR);
1509 fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1512 memset(&ifr, 0, sizeof(ifr));
1513 ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1514 pstrcpy(ifr.ifr_name, IFNAMSIZ, "tun%d");
1515 ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1517 fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1521 printf("Connected to host network interface: %s\n", ifr.ifr_name);
1522 fcntl(fd, F_SETFL, O_NONBLOCK);
1525 /* try to launch network init script */
1529 execl(network_script, network_script, ifr.ifr_name, NULL);
1532 while (waitpid(pid, &status, 0) != pid);
1533 if (!WIFEXITED(status) ||
1534 WEXITSTATUS(status) != 0) {
1535 fprintf(stderr, "%s: could not launch network script for '%s'\n",
1536 network_script, ifr.ifr_name);
1542 void net_send_packet(NE2000State *s, const uint8_t *buf, int size)
1545 printf("NE2000: sending packet size=%d\n", size);
1547 write(net_fd, buf, size);
1550 /* return true if the NE2000 can receive more data */
1551 int ne2000_can_receive(NE2000State *s)
1553 int avail, index, boundary;
1555 if (s->cmd & E8390_STOP)
1557 index = s->curpag << 8;
1558 boundary = s->boundary << 8;
1559 if (index < boundary)
1560 avail = boundary - index;
1562 avail = (s->stop - s->start) - (index - boundary);
1563 if (avail < (MAX_ETH_FRAME_SIZE + 4))
1568 void ne2000_receive(NE2000State *s, uint8_t *buf, int size)
1571 int total_len, next, avail, len, index;
1573 #if defined(DEBUG_NE2000)
1574 printf("NE2000: received len=%d\n", size);
1577 index = s->curpag << 8;
1578 /* 4 bytes for header */
1579 total_len = size + 4;
1580 /* address for next packet (4 bytes for CRC) */
1581 next = index + ((total_len + 4 + 255) & ~0xff);
1582 if (next >= s->stop)
1583 next -= (s->stop - s->start);
1584 /* prepare packet header */
1586 p[0] = ENRSR_RXOK; /* receive status */
1589 p[3] = total_len >> 8;
1592 /* write packet data */
1594 avail = s->stop - index;
1598 memcpy(s->mem + index, buf, len);
1601 if (index == s->stop)
1605 s->curpag = next >> 8;
1607 /* now we can signal we have receive something */
1609 ne2000_update_irq(s);
1612 void ne2000_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
1614 NE2000State *s = &ne2000_state;
1619 printf("NE2000: write addr=0x%x val=0x%02x\n", addr, val);
1621 if (addr == E8390_CMD) {
1622 /* control register */
1624 if (val & E8390_START) {
1625 /* test specific case: zero length transfert */
1626 if ((val & (E8390_RREAD | E8390_RWRITE)) &&
1628 s->isr |= ENISR_RDC;
1629 ne2000_update_irq(s);
1631 if (val & E8390_TRANS) {
1632 net_send_packet(s, s->mem + (s->tpsr << 8), s->tcnt);
1633 /* signal end of transfert */
1636 ne2000_update_irq(s);
1641 offset = addr | (page << 4);
1644 s->start = val << 8;
1654 ne2000_update_irq(s);
1660 s->tcnt = (s->tcnt & 0xff00) | val;
1663 s->tcnt = (s->tcnt & 0x00ff) | (val << 8);
1666 s->rsar = (s->rsar & 0xff00) | val;
1669 s->rsar = (s->rsar & 0x00ff) | (val << 8);
1672 s->rcnt = (s->rcnt & 0xff00) | val;
1675 s->rcnt = (s->rcnt & 0x00ff) | (val << 8);
1682 ne2000_update_irq(s);
1684 case EN1_PHYS ... EN1_PHYS + 5:
1685 s->phys[offset - EN1_PHYS] = val;
1690 case EN1_MULT ... EN1_MULT + 7:
1691 s->mult[offset - EN1_MULT] = val;
1697 uint32_t ne2000_ioport_read(CPUX86State *env, uint32_t addr)
1699 NE2000State *s = &ne2000_state;
1700 int offset, page, ret;
1703 if (addr == E8390_CMD) {
1707 offset = addr | (page << 4);
1718 case EN1_PHYS ... EN1_PHYS + 5:
1719 ret = s->phys[offset - EN1_PHYS];
1724 case EN1_MULT ... EN1_MULT + 7:
1725 ret = s->mult[offset - EN1_MULT];
1733 printf("NE2000: read addr=0x%x val=%02x\n", addr, ret);
1738 void ne2000_asic_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
1740 NE2000State *s = &ne2000_state;
1744 printf("NE2000: asic write val=0x%04x\n", val);
1746 p = s->mem + s->rsar;
1747 if (s->dcfg & 0x01) {
1760 if (s->rsar == s->stop)
1763 /* signal end of transfert */
1764 s->isr |= ENISR_RDC;
1765 ne2000_update_irq(s);
1769 uint32_t ne2000_asic_ioport_read(CPUX86State *env, uint32_t addr)
1771 NE2000State *s = &ne2000_state;
1775 p = s->mem + s->rsar;
1776 if (s->dcfg & 0x01) {
1778 ret = p[0] | (p[1] << 8);
1788 if (s->rsar == s->stop)
1791 /* signal end of transfert */
1792 s->isr |= ENISR_RDC;
1793 ne2000_update_irq(s);
1796 printf("NE2000: asic read val=0x%04x\n", ret);
1801 void ne2000_reset_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
1803 /* nothing to do (end of reset pulse) */
1806 uint32_t ne2000_reset_ioport_read(CPUX86State *env, uint32_t addr)
1812 void ne2000_init(void)
1814 register_ioport_write(NE2000_IOPORT, 16, ne2000_ioport_write, 1);
1815 register_ioport_read(NE2000_IOPORT, 16, ne2000_ioport_read, 1);
1817 register_ioport_write(NE2000_IOPORT + 0x10, 1, ne2000_asic_ioport_write, 1);
1818 register_ioport_read(NE2000_IOPORT + 0x10, 1, ne2000_asic_ioport_read, 1);
1819 register_ioport_write(NE2000_IOPORT + 0x10, 2, ne2000_asic_ioport_write, 2);
1820 register_ioport_read(NE2000_IOPORT + 0x10, 2, ne2000_asic_ioport_read, 2);
1822 register_ioport_write(NE2000_IOPORT + 0x1f, 1, ne2000_reset_ioport_write, 1);
1823 register_ioport_read(NE2000_IOPORT + 0x1f, 1, ne2000_reset_ioport_read, 1);
1827 /***********************************************************/
1832 /* Bits of HD_STATUS */
1833 #define ERR_STAT 0x01
1834 #define INDEX_STAT 0x02
1835 #define ECC_STAT 0x04 /* Corrected error */
1836 #define DRQ_STAT 0x08
1837 #define SEEK_STAT 0x10
1838 #define SRV_STAT 0x10
1839 #define WRERR_STAT 0x20
1840 #define READY_STAT 0x40
1841 #define BUSY_STAT 0x80
1843 /* Bits for HD_ERROR */
1844 #define MARK_ERR 0x01 /* Bad address mark */
1845 #define TRK0_ERR 0x02 /* couldn't find track 0 */
1846 #define ABRT_ERR 0x04 /* Command aborted */
1847 #define MCR_ERR 0x08 /* media change request */
1848 #define ID_ERR 0x10 /* ID field not found */
1849 #define MC_ERR 0x20 /* media changed */
1850 #define ECC_ERR 0x40 /* Uncorrectable ECC error */
1851 #define BBD_ERR 0x80 /* pre-EIDE meaning: block marked bad */
1852 #define ICRC_ERR 0x80 /* new meaning: CRC error during transfer */
1854 /* Bits of HD_NSECTOR */
1858 #define TAG_MASK 0xf8
1860 #define IDE_CMD_RESET 0x04
1861 #define IDE_CMD_DISABLE_IRQ 0x02
1863 /* ATA/ATAPI Commands pre T13 Spec */
1864 #define WIN_NOP 0x00
1866 * 0x01->0x02 Reserved
1868 #define CFA_REQ_EXT_ERROR_CODE 0x03 /* CFA Request Extended Error Code */
1870 * 0x04->0x07 Reserved
1872 #define WIN_SRST 0x08 /* ATAPI soft reset command */
1873 #define WIN_DEVICE_RESET 0x08
1875 * 0x09->0x0F Reserved
1877 #define WIN_RECAL 0x10
1878 #define WIN_RESTORE WIN_RECAL
1880 * 0x10->0x1F Reserved
1882 #define WIN_READ 0x20 /* 28-Bit */
1883 #define WIN_READ_ONCE 0x21 /* 28-Bit without retries */
1884 #define WIN_READ_LONG 0x22 /* 28-Bit */
1885 #define WIN_READ_LONG_ONCE 0x23 /* 28-Bit without retries */
1886 #define WIN_READ_EXT 0x24 /* 48-Bit */
1887 #define WIN_READDMA_EXT 0x25 /* 48-Bit */
1888 #define WIN_READDMA_QUEUED_EXT 0x26 /* 48-Bit */
1889 #define WIN_READ_NATIVE_MAX_EXT 0x27 /* 48-Bit */
1893 #define WIN_MULTREAD_EXT 0x29 /* 48-Bit */
1895 * 0x2A->0x2F Reserved
1897 #define WIN_WRITE 0x30 /* 28-Bit */
1898 #define WIN_WRITE_ONCE 0x31 /* 28-Bit without retries */
1899 #define WIN_WRITE_LONG 0x32 /* 28-Bit */
1900 #define WIN_WRITE_LONG_ONCE 0x33 /* 28-Bit without retries */
1901 #define WIN_WRITE_EXT 0x34 /* 48-Bit */
1902 #define WIN_WRITEDMA_EXT 0x35 /* 48-Bit */
1903 #define WIN_WRITEDMA_QUEUED_EXT 0x36 /* 48-Bit */
1904 #define WIN_SET_MAX_EXT 0x37 /* 48-Bit */
1905 #define CFA_WRITE_SECT_WO_ERASE 0x38 /* CFA Write Sectors without erase */
1906 #define WIN_MULTWRITE_EXT 0x39 /* 48-Bit */
1908 * 0x3A->0x3B Reserved
1910 #define WIN_WRITE_VERIFY 0x3C /* 28-Bit */
1912 * 0x3D->0x3F Reserved
1914 #define WIN_VERIFY 0x40 /* 28-Bit - Read Verify Sectors */
1915 #define WIN_VERIFY_ONCE 0x41 /* 28-Bit - without retries */
1916 #define WIN_VERIFY_EXT 0x42 /* 48-Bit */
1918 * 0x43->0x4F Reserved
1920 #define WIN_FORMAT 0x50
1922 * 0x51->0x5F Reserved
1924 #define WIN_INIT 0x60
1926 * 0x61->0x5F Reserved
1928 #define WIN_SEEK 0x70 /* 0x70-0x7F Reserved */
1929 #define CFA_TRANSLATE_SECTOR 0x87 /* CFA Translate Sector */
1930 #define WIN_DIAGNOSE 0x90
1931 #define WIN_SPECIFY 0x91 /* set drive geometry translation */
1932 #define WIN_DOWNLOAD_MICROCODE 0x92
1933 #define WIN_STANDBYNOW2 0x94
1934 #define WIN_STANDBY2 0x96
1935 #define WIN_SETIDLE2 0x97
1936 #define WIN_CHECKPOWERMODE2 0x98
1937 #define WIN_SLEEPNOW2 0x99
1941 #define WIN_PACKETCMD 0xA0 /* Send a packet command. */
1942 #define WIN_PIDENTIFY 0xA1 /* identify ATAPI device */
1943 #define WIN_QUEUED_SERVICE 0xA2
1944 #define WIN_SMART 0xB0 /* self-monitoring and reporting */
1945 #define CFA_ERASE_SECTORS 0xC0
1946 #define WIN_MULTREAD 0xC4 /* read sectors using multiple mode*/
1947 #define WIN_MULTWRITE 0xC5 /* write sectors using multiple mode */
1948 #define WIN_SETMULT 0xC6 /* enable/disable multiple mode */
1949 #define WIN_READDMA_QUEUED 0xC7 /* read sectors using Queued DMA transfers */
1950 #define WIN_READDMA 0xC8 /* read sectors using DMA transfers */
1951 #define WIN_READDMA_ONCE 0xC9 /* 28-Bit - without retries */
1952 #define WIN_WRITEDMA 0xCA /* write sectors using DMA transfers */
1953 #define WIN_WRITEDMA_ONCE 0xCB /* 28-Bit - without retries */
1954 #define WIN_WRITEDMA_QUEUED 0xCC /* write sectors using Queued DMA transfers */
1955 #define CFA_WRITE_MULTI_WO_ERASE 0xCD /* CFA Write multiple without erase */
1956 #define WIN_GETMEDIASTATUS 0xDA
1957 #define WIN_ACKMEDIACHANGE 0xDB /* ATA-1, ATA-2 vendor */
1958 #define WIN_POSTBOOT 0xDC
1959 #define WIN_PREBOOT 0xDD
1960 #define WIN_DOORLOCK 0xDE /* lock door on removable drives */
1961 #define WIN_DOORUNLOCK 0xDF /* unlock door on removable drives */
1962 #define WIN_STANDBYNOW1 0xE0
1963 #define WIN_IDLEIMMEDIATE 0xE1 /* force drive to become "ready" */
1964 #define WIN_STANDBY 0xE2 /* Set device in Standby Mode */
1965 #define WIN_SETIDLE1 0xE3
1966 #define WIN_READ_BUFFER 0xE4 /* force read only 1 sector */
1967 #define WIN_CHECKPOWERMODE1 0xE5
1968 #define WIN_SLEEPNOW1 0xE6
1969 #define WIN_FLUSH_CACHE 0xE7
1970 #define WIN_WRITE_BUFFER 0xE8 /* force write only 1 sector */
1971 #define WIN_WRITE_SAME 0xE9 /* read ata-2 to use */
1972 /* SET_FEATURES 0x22 or 0xDD */
1973 #define WIN_FLUSH_CACHE_EXT 0xEA /* 48-Bit */
1974 #define WIN_IDENTIFY 0xEC /* ask drive to identify itself */
1975 #define WIN_MEDIAEJECT 0xED
1976 #define WIN_IDENTIFY_DMA 0xEE /* same as WIN_IDENTIFY, but DMA */
1977 #define WIN_SETFEATURES 0xEF /* set special drive features */
1978 #define EXABYTE_ENABLE_NEST 0xF0
1979 #define WIN_SECURITY_SET_PASS 0xF1
1980 #define WIN_SECURITY_UNLOCK 0xF2
1981 #define WIN_SECURITY_ERASE_PREPARE 0xF3
1982 #define WIN_SECURITY_ERASE_UNIT 0xF4
1983 #define WIN_SECURITY_FREEZE_LOCK 0xF5
1984 #define WIN_SECURITY_DISABLE 0xF6
1985 #define WIN_READ_NATIVE_MAX 0xF8 /* return the native maximum address */
1986 #define WIN_SET_MAX 0xF9
1987 #define DISABLE_SEAGATE 0xFB
1989 /* set to 1 set disable mult support */
1990 #define MAX_MULT_SECTORS 8
1994 typedef void EndTransferFunc(struct IDEState *);
1996 typedef struct IDEState {
1998 int cylinders, heads, sectors;
2005 uint16_t nsector; /* 0 is 256 to ease computations */
2011 /* 0x3f6 command, only meaningful for drive 0 */
2013 /* depends on bit 4 in select, only meaningful for drive 0 */
2014 struct IDEState *cur_drive;
2015 BlockDriverState *bs;
2016 int req_nb_sectors; /* number of sectors per interrupt */
2017 EndTransferFunc *end_transfer_func;
2020 uint8_t io_buffer[MAX_MULT_SECTORS*512 + 4];
2023 IDEState ide_state[MAX_DISKS];
2025 static void padstr(char *str, const char *src, int len)
2028 for(i = 0; i < len; i++) {
2033 *(char *)((long)str ^ 1) = v;
2038 static void ide_identify(IDEState *s)
2041 unsigned int oldsize;
2043 memset(s->io_buffer, 0, 512);
2044 p = (uint16_t *)s->io_buffer;
2046 stw(p + 1, s->cylinders);
2047 stw(p + 3, s->heads);
2048 stw(p + 4, 512 * s->sectors); /* sectors */
2049 stw(p + 5, 512); /* sector size */
2050 stw(p + 6, s->sectors);
2051 stw(p + 20, 3); /* buffer type */
2052 stw(p + 21, 512); /* cache size in sectors */
2053 stw(p + 22, 4); /* ecc bytes */
2054 padstr((uint8_t *)(p + 27), "QEMU HARDDISK", 40);
2055 #if MAX_MULT_SECTORS > 1
2056 stw(p + 47, MAX_MULT_SECTORS);
2058 stw(p + 48, 1); /* dword I/O */
2059 stw(p + 49, 1 << 9); /* LBA supported, no DMA */
2060 stw(p + 51, 0x200); /* PIO transfer cycle */
2061 stw(p + 52, 0x200); /* DMA transfer cycle */
2062 stw(p + 54, s->cylinders);
2063 stw(p + 55, s->heads);
2064 stw(p + 56, s->sectors);
2065 oldsize = s->cylinders * s->heads * s->sectors;
2066 stw(p + 57, oldsize);
2067 stw(p + 58, oldsize >> 16);
2068 if (s->mult_sectors)
2069 stw(p + 59, 0x100 | s->mult_sectors);
2070 stw(p + 60, s->nb_sectors);
2071 stw(p + 61, s->nb_sectors >> 16);
2072 stw(p + 80, (1 << 1) | (1 << 2));
2073 stw(p + 82, (1 << 14));
2074 stw(p + 83, (1 << 14));
2075 stw(p + 84, (1 << 14));
2076 stw(p + 85, (1 << 14));
2078 stw(p + 87, (1 << 14));
2081 static inline void ide_abort_command(IDEState *s)
2083 s->status = READY_STAT | ERR_STAT;
2084 s->error = ABRT_ERR;
2087 static inline void ide_set_irq(IDEState *s)
2089 if (!(ide_state[0].cmd & IDE_CMD_DISABLE_IRQ)) {
2090 pic_set_irq(s->irq, 1);
2094 /* prepare data transfer and tell what to do after */
2095 static void ide_transfer_start(IDEState *s, int size,
2096 EndTransferFunc *end_transfer_func)
2098 s->end_transfer_func = end_transfer_func;
2099 s->data_ptr = s->io_buffer;
2100 s->data_end = s->io_buffer + size;
2101 s->status |= DRQ_STAT;
2104 static void ide_transfer_stop(IDEState *s)
2106 s->end_transfer_func = ide_transfer_stop;
2107 s->data_ptr = s->io_buffer;
2108 s->data_end = s->io_buffer;
2109 s->status &= ~DRQ_STAT;
2112 static int64_t ide_get_sector(IDEState *s)
2115 if (s->select & 0x40) {
2117 sector_num = ((s->select & 0x0f) << 24) | (s->hcyl << 16) |
2118 (s->lcyl << 8) | s->sector;
2120 sector_num = ((s->hcyl << 8) | s->lcyl) * s->heads * s->sectors +
2121 (s->select & 0x0f) * s->sectors +
2127 static void ide_set_sector(IDEState *s, int64_t sector_num)
2129 unsigned int cyl, r;
2130 if (s->select & 0x40) {
2131 s->select = (s->select & 0xf0) | (sector_num >> 24);
2132 s->hcyl = (sector_num >> 16);
2133 s->lcyl = (sector_num >> 8);
2134 s->sector = (sector_num);
2136 cyl = sector_num / (s->heads * s->sectors);
2137 r = sector_num % (s->heads * s->sectors);
2140 s->select = (s->select & 0xf0) | (r / s->sectors);
2141 s->sector = (r % s->sectors) + 1;
2145 static void ide_sector_read(IDEState *s)
2150 s->status = READY_STAT | SEEK_STAT;
2151 sector_num = ide_get_sector(s);
2154 /* no more sector to read from disk */
2155 ide_transfer_stop(s);
2157 #if defined(DEBUG_IDE)
2158 printf("read sector=%Ld\n", sector_num);
2160 if (n > s->req_nb_sectors)
2161 n = s->req_nb_sectors;
2162 ret = bdrv_read(s->bs, sector_num, s->io_buffer, n);
2163 ide_transfer_start(s, 512 * n, ide_sector_read);
2165 ide_set_sector(s, sector_num + n);
2170 static void ide_sector_write(IDEState *s)
2175 s->status = READY_STAT | SEEK_STAT;
2176 sector_num = ide_get_sector(s);
2177 #if defined(DEBUG_IDE)
2178 printf("write sector=%Ld\n", sector_num);
2181 if (n > s->req_nb_sectors)
2182 n = s->req_nb_sectors;
2183 ret = bdrv_write(s->bs, sector_num, s->io_buffer, n);
2185 if (s->nsector == 0) {
2186 /* no more sector to write */
2187 ide_transfer_stop(s);
2190 if (n1 > s->req_nb_sectors)
2191 n1 = s->req_nb_sectors;
2192 ide_transfer_start(s, 512 * n1, ide_sector_write);
2194 ide_set_sector(s, sector_num + n);
2198 void ide_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
2200 IDEState *s = ide_state[0].cur_drive;
2205 printf("IDE: write addr=0x%x val=0x%02x\n", addr, val);
2229 unit = (val >> 4) & 1;
2230 s = &ide_state[unit];
2231 ide_state[0].cur_drive = s;
2237 #if defined(DEBUG_IDE)
2238 printf("ide: CMD=%02x\n", val);
2245 s->status = READY_STAT;
2246 ide_transfer_start(s, 512, ide_transfer_stop);
2248 ide_abort_command(s);
2254 s->status = READY_STAT;
2258 if (s->nsector > MAX_MULT_SECTORS ||
2260 (s->nsector & (s->nsector - 1)) != 0) {
2261 ide_abort_command(s);
2263 s->mult_sectors = s->nsector;
2264 s->status = READY_STAT;
2270 s->req_nb_sectors = 1;
2274 case WIN_WRITE_ONCE:
2275 s->status = SEEK_STAT;
2276 s->req_nb_sectors = 1;
2277 ide_transfer_start(s, 512, ide_sector_write);
2280 if (!s->mult_sectors)
2282 s->req_nb_sectors = s->mult_sectors;
2286 if (!s->mult_sectors)
2288 s->status = SEEK_STAT;
2289 s->req_nb_sectors = s->mult_sectors;
2291 if (n > s->req_nb_sectors)
2292 n = s->req_nb_sectors;
2293 ide_transfer_start(s, 512 * n, ide_sector_write);
2295 case WIN_READ_NATIVE_MAX:
2296 ide_set_sector(s, s->nb_sectors - 1);
2297 s->status = READY_STAT;
2302 ide_abort_command(s);
2309 uint32_t ide_ioport_read(CPUX86State *env, uint32_t addr)
2311 IDEState *s = ide_state[0].cur_drive;
2323 ret = s->nsector & 0xff;
2340 pic_set_irq(s->irq, 0);
2344 printf("ide: read addr=0x%x val=%02x\n", addr, ret);
2349 uint32_t ide_status_read(CPUX86State *env, uint32_t addr)
2351 IDEState *s = ide_state[0].cur_drive;
2355 printf("ide: read addr=0x%x val=%02x\n", addr, ret);
2360 void ide_cmd_write(CPUX86State *env, uint32_t addr, uint32_t val)
2362 IDEState *s = &ide_state[0];
2363 /* common for both drives */
2367 void ide_data_writew(CPUX86State *env, uint32_t addr, uint32_t val)
2369 IDEState *s = ide_state[0].cur_drive;
2373 *(uint16_t *)p = tswap16(val);
2376 if (p >= s->data_end)
2377 s->end_transfer_func(s);
2380 uint32_t ide_data_readw(CPUX86State *env, uint32_t addr)
2382 IDEState *s = ide_state[0].cur_drive;
2387 ret = tswap16(*(uint16_t *)p);
2390 if (p >= s->data_end)
2391 s->end_transfer_func(s);
2395 void ide_data_writel(CPUX86State *env, uint32_t addr, uint32_t val)
2397 IDEState *s = ide_state[0].cur_drive;
2401 *(uint32_t *)p = tswap32(val);
2404 if (p >= s->data_end)
2405 s->end_transfer_func(s);
2408 uint32_t ide_data_readl(CPUX86State *env, uint32_t addr)
2410 IDEState *s = ide_state[0].cur_drive;
2415 ret = tswap32(*(uint32_t *)p);
2418 if (p >= s->data_end)
2419 s->end_transfer_func(s);
2423 void ide_reset(IDEState *s)
2425 s->mult_sectors = MAX_MULT_SECTORS;
2426 s->status = READY_STAT;
2437 for(i = 0; i < MAX_DISKS; i++) {
2439 s->bs = bs_table[i];
2441 bdrv_get_geometry(s->bs, &nb_sectors);
2442 cylinders = nb_sectors / (16 * 63);
2443 if (cylinders > 16383)
2445 else if (cylinders < 2)
2447 s->cylinders = cylinders;
2450 s->nb_sectors = nb_sectors;
2455 register_ioport_write(0x1f0, 8, ide_ioport_write, 1);
2456 register_ioport_read(0x1f0, 8, ide_ioport_read, 1);
2457 register_ioport_read(0x3f6, 1, ide_status_read, 1);
2458 register_ioport_write(0x3f6, 1, ide_cmd_write, 1);
2461 register_ioport_write(0x1f0, 2, ide_data_writew, 2);
2462 register_ioport_read(0x1f0, 2, ide_data_readw, 2);
2463 register_ioport_write(0x1f0, 4, ide_data_writel, 4);
2464 register_ioport_read(0x1f0, 4, ide_data_readl, 4);
2467 /***********************************************************/
2468 /* simulate reset (stop qemu) */
2470 int reset_requested;
2472 uint32_t kbd_read_status(CPUX86State *env, uint32_t addr)
2477 void kbd_write_command(CPUX86State *env, uint32_t addr, uint32_t val)
2481 reset_requested = 1;
2482 cpu_x86_interrupt(global_env, CPU_INTERRUPT_EXIT);
2491 register_ioport_read(0x64, 1, kbd_read_status, 1);
2492 register_ioport_write(0x64, 1, kbd_write_command, 1);
2495 /***********************************************************/
2496 /* cpu signal handler */
2497 static void host_segv_handler(int host_signum, siginfo_t *info,
2500 if (cpu_signal_handler(host_signum, info, puc))
2506 static int timer_irq_pending;
2507 static int timer_irq_count;
2509 static void host_alarm_handler(int host_signum, siginfo_t *info,
2512 /* NOTE: since usually the OS asks a 100 Hz clock, there can be
2513 some drift between cpu_get_ticks() and the interrupt time. So
2514 we queue some interrupts to avoid missing some */
2515 timer_irq_count += pit_get_out_edges(&pit_channels[0]);
2516 if (timer_irq_count) {
2517 if (timer_irq_count > 2)
2518 timer_irq_count = 2;
2520 /* just exit from the cpu to have a chance to handle timers */
2521 cpu_x86_interrupt(global_env, CPU_INTERRUPT_EXIT);
2522 timer_irq_pending = 1;
2526 unsigned long mmap_addr = PHYS_RAM_BASE;
2528 void *get_mmap_addr(unsigned long size)
2532 mmap_addr += ((size + 4095) & ~4095) + 4096;
2533 return (void *)addr;
2536 /* main execution loop */
2538 CPUState *cpu_gdbstub_get_env(void *opaque)
2543 void main_loop(void *opaque)
2545 struct pollfd ufds[2], *pf, *serial_ufd, *net_ufd, *gdb_ufd;
2546 int ret, n, timeout;
2548 CPUState *env = global_env;
2552 ret = cpu_x86_exec(env);
2553 if (reset_requested)
2556 /* if hlt instruction, we wait until the next IRQ */
2557 if (ret == EXCP_HLT)
2561 /* poll any events */
2564 if (!(serial_ports[0].lsr & UART_LSR_DR)) {
2567 pf->events = POLLIN;
2571 if (net_fd > 0 && ne2000_can_receive(&ne2000_state)) {
2574 pf->events = POLLIN;
2578 if (gdbstub_fd > 0) {
2580 pf->fd = gdbstub_fd;
2581 pf->events = POLLIN;
2585 ret = poll(ufds, pf - ufds, timeout);
2587 if (serial_ufd && (serial_ufd->revents & POLLIN)) {
2588 n = read(0, &ch, 1);
2590 serial_received_byte(&serial_ports[0], ch);
2593 if (net_ufd && (net_ufd->revents & POLLIN)) {
2594 uint8_t buf[MAX_ETH_FRAME_SIZE];
2596 n = read(net_fd, buf, MAX_ETH_FRAME_SIZE);
2599 memset(buf + n, 0, 60 - n);
2602 ne2000_receive(&ne2000_state, buf, n);
2605 if (gdb_ufd && (gdb_ufd->revents & POLLIN)) {
2607 /* stop emulation if requested by gdb */
2608 n = read(gdbstub_fd, buf, 1);
2615 if (timer_irq_pending) {
2618 timer_irq_pending = 0;
2625 printf("Virtual Linux version " QEMU_VERSION ", Copyright (c) 2003 Fabrice Bellard\n"
2626 "usage: vl [options] bzImage [kernel parameters...]\n"
2628 "'bzImage' is a Linux kernel image (PAGE_OFFSET must be defined\n"
2629 "to 0x90000000 in asm/page.h and arch/i386/vmlinux.lds)\n"
2631 "General options:\n"
2632 "-initrd file use 'file' as initial ram disk\n"
2633 "-hda file use 'file' as hard disk 0 image\n"
2634 "-hdb file use 'file' as hard disk 1 image\n"
2635 "-snapshot write to temporary files instead of disk image files\n"
2636 "-m megs set virtual RAM size to megs MB\n"
2637 "-n script set network init script [default=%s]\n"
2640 "-s wait gdb connection to port %d\n"
2641 "-p port change gdb connection port\n"
2642 "-d output log in /tmp/vl.log\n"
2644 "During emulation, use C-a h to get terminal commands:\n",
2645 DEFAULT_NETWORK_SCRIPT, DEFAULT_GDBSTUB_PORT);
2650 struct option long_options[] = {
2651 { "initrd", 1, NULL, 0, },
2652 { "hda", 1, NULL, 0, },
2653 { "hdb", 1, NULL, 0, },
2654 { "snapshot", 0, NULL, 0, },
2655 { NULL, 0, NULL, 0 },
2658 int main(int argc, char **argv)
2660 int c, ret, initrd_size, i, use_gdbstub, gdbstub_port, long_index;
2662 struct linux_params *params;
2663 struct sigaction act;
2664 struct itimerval itv;
2666 const char *tmpdir, *initrd_filename;
2667 const char *hd_filename[MAX_DISKS];
2669 /* we never want that malloc() uses mmap() */
2670 mallopt(M_MMAP_THRESHOLD, 4096 * 1024);
2671 initrd_filename = NULL;
2672 for(i = 0; i < MAX_DISKS; i++)
2673 hd_filename[i] = NULL;
2674 phys_ram_size = 32 * 1024 * 1024;
2675 pstrcpy(network_script, sizeof(network_script), DEFAULT_NETWORK_SCRIPT);
2677 gdbstub_port = DEFAULT_GDBSTUB_PORT;
2680 c = getopt_long_only(argc, argv, "hm:dn:sp:", long_options, &long_index);
2685 switch(long_index) {
2687 initrd_filename = optarg;
2690 hd_filename[0] = optarg;
2693 hd_filename[1] = optarg;
2704 phys_ram_size = atoi(optarg) * 1024 * 1024;
2705 if (phys_ram_size <= 0)
2707 if (phys_ram_size > PHYS_RAM_MAX_SIZE) {
2708 fprintf(stderr, "vl: at most %d MB RAM can be simulated\n",
2709 PHYS_RAM_MAX_SIZE / (1024 * 1024));
2717 pstrcpy(network_script, sizeof(network_script), optarg);
2723 gdbstub_port = atoi(optarg);
2731 setvbuf(stdout, NULL, _IOLBF, 0);
2733 logfile = fopen(DEBUG_LOGFILE, "w");
2735 perror(DEBUG_LOGFILE);
2738 setvbuf(logfile, NULL, _IOLBF, 0);
2741 /* init network tun interface */
2744 /* init the memory */
2745 tmpdir = getenv("VLTMPDIR");
2748 snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/vlXXXXXX", tmpdir);
2749 if (mkstemp(phys_ram_file) < 0) {
2750 fprintf(stderr, "Could not create temporary memory file '%s'\n",
2754 phys_ram_fd = open(phys_ram_file, O_CREAT | O_TRUNC | O_RDWR, 0600);
2755 if (phys_ram_fd < 0) {
2756 fprintf(stderr, "Could not open temporary memory file '%s'\n",
2760 ftruncate(phys_ram_fd, phys_ram_size);
2761 unlink(phys_ram_file);
2762 phys_ram_base = mmap(get_mmap_addr(phys_ram_size), phys_ram_size,
2763 PROT_WRITE | PROT_READ, MAP_SHARED | MAP_FIXED,
2765 if (phys_ram_base == MAP_FAILED) {
2766 fprintf(stderr, "Could not map physical memory\n");
2770 /* open the virtual block devices */
2771 for(i = 0; i < MAX_DISKS; i++) {
2772 if (hd_filename[i]) {
2773 bs_table[i] = bdrv_open(hd_filename[i], snapshot);
2775 fprintf(stderr, "vl: could not open hard disk image '%s\n",
2782 /* now we can load the kernel */
2783 ret = load_kernel(argv[optind], phys_ram_base + KERNEL_LOAD_ADDR);
2785 fprintf(stderr, "vl: could not load kernel '%s'\n", argv[optind]);
2791 if (initrd_filename) {
2792 initrd_size = load_image(initrd_filename, phys_ram_base + INITRD_LOAD_ADDR);
2793 if (initrd_size < 0) {
2794 fprintf(stderr, "vl: could not load initial ram disk '%s'\n",
2800 /* init kernel params */
2801 params = (void *)(phys_ram_base + KERNEL_PARAMS_ADDR);
2802 memset(params, 0, sizeof(struct linux_params));
2803 params->mount_root_rdonly = 0;
2804 params->cl_magic = 0xA33F;
2805 params->cl_offset = params->commandline - (uint8_t *)params;
2806 params->alt_mem_k = (phys_ram_size / 1024) - 1024;
2807 for(i = optind + 1; i < argc; i++) {
2808 if (i != optind + 1)
2809 pstrcat(params->commandline, sizeof(params->commandline), " ");
2810 pstrcat(params->commandline, sizeof(params->commandline), argv[i]);
2812 params->loader_type = 0x01;
2813 if (initrd_size > 0) {
2814 params->initrd_start = INITRD_LOAD_ADDR;
2815 params->initrd_size = initrd_size;
2817 params->orig_video_lines = 25;
2818 params->orig_video_cols = 80;
2820 /* init basic PC hardware */
2822 register_ioport_write(0x80, 1, ioport80_write, 1);
2824 register_ioport_write(0x3d4, 2, vga_ioport_write, 1);
2834 /* setup cpu signal handlers for MMU / self modifying code handling */
2835 sigfillset(&act.sa_mask);
2836 act.sa_flags = SA_SIGINFO;
2837 act.sa_sigaction = host_segv_handler;
2838 sigaction(SIGSEGV, &act, NULL);
2839 sigaction(SIGBUS, &act, NULL);
2841 act.sa_sigaction = host_alarm_handler;
2842 sigaction(SIGALRM, &act, NULL);
2844 /* init CPU state */
2847 cpu_single_env = env;
2849 /* setup basic memory access */
2850 env->cr[0] = 0x00000033;
2851 cpu_x86_init_mmu(env);
2853 memset(params->idt_table, 0, sizeof(params->idt_table));
2855 params->gdt_table[2] = 0x00cf9a000000ffffLL; /* KERNEL_CS */
2856 params->gdt_table[3] = 0x00cf92000000ffffLL; /* KERNEL_DS */
2858 env->idt.base = (void *)params->idt_table;
2859 env->idt.limit = sizeof(params->idt_table) - 1;
2860 env->gdt.base = (void *)params->gdt_table;
2861 env->gdt.limit = sizeof(params->gdt_table) - 1;
2863 cpu_x86_load_seg(env, R_CS, KERNEL_CS);
2864 cpu_x86_load_seg(env, R_DS, KERNEL_DS);
2865 cpu_x86_load_seg(env, R_ES, KERNEL_DS);
2866 cpu_x86_load_seg(env, R_SS, KERNEL_DS);
2867 cpu_x86_load_seg(env, R_FS, KERNEL_DS);
2868 cpu_x86_load_seg(env, R_GS, KERNEL_DS);
2870 env->eip = KERNEL_LOAD_ADDR;
2871 env->regs[R_ESI] = KERNEL_PARAMS_ADDR;
2874 itv.it_interval.tv_sec = 0;
2875 itv.it_interval.tv_usec = 1000;
2876 itv.it_value.tv_sec = 0;
2877 itv.it_value.tv_usec = 10 * 1000;
2878 setitimer(ITIMER_REAL, &itv, NULL);
2879 /* we probe the tick duration of the kernel to inform the user if
2880 the emulated kernel requested a too high timer frequency */
2881 getitimer(ITIMER_REAL, &itv);
2882 pit_min_timer_count = ((uint64_t)itv.it_interval.tv_usec * PIT_FREQ) /
2886 cpu_gdbstub(NULL, main_loop, gdbstub_port);