/* * QEMU PC System Emulator * * Copyright (c) 2003 Fabrice Bellard * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "cpu.h" #include "disas.h" #include "thunk.h" #include "vl.h" #define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup" #define BIOS_FILENAME "bios.bin" #define VGABIOS_FILENAME "vgabios.bin" //#define DEBUG_UNUSED_IOPORT //#define DEBUG_IRQ_LATENCY /* output Bochs bios info messages */ //#define DEBUG_BIOS /* debug PIC */ //#define DEBUG_PIC /* debug NE2000 card */ //#define DEBUG_NE2000 /* debug PC keyboard */ //#define DEBUG_KBD /* debug PC keyboard : only mouse */ //#define DEBUG_MOUSE #define PHYS_RAM_BASE 0xac000000 #define PHYS_RAM_MAX_SIZE (256 * 1024 * 1024) #define KERNEL_LOAD_ADDR 0x00100000 #define INITRD_LOAD_ADDR 0x00400000 #define KERNEL_PARAMS_ADDR 0x00090000 #define GUI_REFRESH_INTERVAL 30 /* from plex86 (BSD license) */ struct __attribute__ ((packed)) linux_params { // For 0x00..0x3f, see 'struct screen_info' in linux/include/linux/tty.h. // I just padded out the VESA parts, rather than define them. /* 0x000 */ uint8_t orig_x; /* 0x001 */ uint8_t orig_y; /* 0x002 */ uint16_t ext_mem_k; /* 0x004 */ uint16_t orig_video_page; /* 0x006 */ uint8_t orig_video_mode; /* 0x007 */ uint8_t orig_video_cols; /* 0x008 */ uint16_t unused1; /* 0x00a */ uint16_t orig_video_ega_bx; /* 0x00c */ uint16_t unused2; /* 0x00e */ uint8_t orig_video_lines; /* 0x00f */ uint8_t orig_video_isVGA; /* 0x010 */ uint16_t orig_video_points; /* 0x012 */ uint8_t pad0[0x20 - 0x12]; // VESA info. /* 0x020 */ uint16_t cl_magic; // Commandline magic number (0xA33F) /* 0x022 */ uint16_t cl_offset; // Commandline offset. Address of commandline // is calculated as 0x90000 + cl_offset, bu // only if cl_magic == 0xA33F. /* 0x024 */ uint8_t pad1[0x40 - 0x24]; // VESA info. /* 0x040 */ uint8_t apm_bios_info[20]; // struct apm_bios_info /* 0x054 */ uint8_t pad2[0x80 - 0x54]; // Following 2 from 'struct drive_info_struct' in drivers/block/cciss.h. // Might be truncated? /* 0x080 */ uint8_t hd0_info[16]; // hd0-disk-parameter from intvector 0x41 /* 0x090 */ uint8_t hd1_info[16]; // hd1-disk-parameter from intvector 0x46 // System description table truncated to 16 bytes // From 'struct sys_desc_table_struct' in linux/arch/i386/kernel/setup.c. /* 0x0a0 */ uint16_t sys_description_len; /* 0x0a2 */ uint8_t sys_description_table[14]; // [0] machine id // [1] machine submodel id // [2] BIOS revision // [3] bit1: MCA bus /* 0x0b0 */ uint8_t pad3[0x1e0 - 0xb0]; /* 0x1e0 */ uint32_t alt_mem_k; /* 0x1e4 */ uint8_t pad4[4]; /* 0x1e8 */ uint8_t e820map_entries; /* 0x1e9 */ uint8_t eddbuf_entries; // EDD_NR /* 0x1ea */ uint8_t pad5[0x1f1 - 0x1ea]; /* 0x1f1 */ uint8_t setup_sects; // size of setup.S, number of sectors /* 0x1f2 */ uint16_t mount_root_rdonly; // MOUNT_ROOT_RDONLY (if !=0) /* 0x1f4 */ uint16_t sys_size; // size of compressed kernel-part in the // (b)zImage-file (in 16 byte units, rounded up) /* 0x1f6 */ uint16_t swap_dev; // (unused AFAIK) /* 0x1f8 */ uint16_t ramdisk_flags; /* 0x1fa */ uint16_t vga_mode; // (old one) /* 0x1fc */ uint16_t orig_root_dev; // (high=Major, low=minor) /* 0x1fe */ uint8_t pad6[1]; /* 0x1ff */ uint8_t aux_device_info; /* 0x200 */ uint16_t jump_setup; // Jump to start of setup code, // aka "reserved" field. /* 0x202 */ uint8_t setup_signature[4]; // Signature for SETUP-header, ="HdrS" /* 0x206 */ uint16_t header_format_version; // Version number of header format; /* 0x208 */ uint8_t setup_S_temp0[8]; // Used by setup.S for communication with // boot loaders, look there. /* 0x210 */ uint8_t loader_type; // 0 for old one. // else 0xTV: // T=0: LILO // T=1: Loadlin // T=2: bootsect-loader // T=3: SYSLINUX // T=4: ETHERBOOT // V=version /* 0x211 */ uint8_t loadflags; // bit0 = 1: kernel is loaded high (bzImage) // bit7 = 1: Heap and pointer (see below) set by boot // loader. /* 0x212 */ uint16_t setup_S_temp1; /* 0x214 */ uint32_t kernel_start; /* 0x218 */ uint32_t initrd_start; /* 0x21c */ uint32_t initrd_size; /* 0x220 */ uint8_t setup_S_temp2[4]; /* 0x224 */ uint16_t setup_S_heap_end_pointer; /* 0x226 */ uint8_t pad7[0x2d0 - 0x226]; /* 0x2d0 : Int 15, ax=e820 memory map. */ // (linux/include/asm-i386/e820.h, 'struct e820entry') #define E820MAX 32 #define E820_RAM 1 #define E820_RESERVED 2 #define E820_ACPI 3 /* usable as RAM once ACPI tables have been read */ #define E820_NVS 4 struct { uint64_t addr; uint64_t size; uint32_t type; } e820map[E820MAX]; /* 0x550 */ uint8_t pad8[0x600 - 0x550]; // BIOS Enhanced Disk Drive Services. // (From linux/include/asm-i386/edd.h, 'struct edd_info') // Each 'struct edd_info is 78 bytes, times a max of 6 structs in array. /* 0x600 */ uint8_t eddbuf[0x7d4 - 0x600]; /* 0x7d4 */ uint8_t pad9[0x800 - 0x7d4]; /* 0x800 */ uint8_t commandline[0x800]; /* 0x1000 */ uint64_t gdt_table[256]; uint64_t idt_table[48]; }; #define KERNEL_CS 0x10 #define KERNEL_DS 0x18 #define MAX_IOPORTS 4096 static const char *bios_dir = CONFIG_QEMU_SHAREDIR; char phys_ram_file[1024]; CPUX86State *global_env; CPUX86State *cpu_single_env; IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS]; IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS]; BlockDriverState *bs_table[MAX_DISKS]; int vga_ram_size; static DisplayState display_state; int nographic; int term_inited; int64_t ticks_per_sec; int boot_device = 'c'; /***********************************************************/ /* x86 io ports */ uint32_t default_ioport_readb(CPUX86State *env, uint32_t address) { #ifdef DEBUG_UNUSED_IOPORT fprintf(stderr, "inb: port=0x%04x\n", address); #endif return 0xff; } void default_ioport_writeb(CPUX86State *env, uint32_t address, uint32_t data) { #ifdef DEBUG_UNUSED_IOPORT fprintf(stderr, "outb: port=0x%04x data=0x%02x\n", address, data); #endif } /* default is to make two byte accesses */ uint32_t default_ioport_readw(CPUX86State *env, uint32_t address) { uint32_t data; data = ioport_read_table[0][address & (MAX_IOPORTS - 1)](env, address); data |= ioport_read_table[0][(address + 1) & (MAX_IOPORTS - 1)](env, address + 1) << 8; return data; } void default_ioport_writew(CPUX86State *env, uint32_t address, uint32_t data) { ioport_write_table[0][address & (MAX_IOPORTS - 1)](env, address, data & 0xff); ioport_write_table[0][(address + 1) & (MAX_IOPORTS - 1)](env, address + 1, (data >> 8) & 0xff); } uint32_t default_ioport_readl(CPUX86State *env, uint32_t address) { #ifdef DEBUG_UNUSED_IOPORT fprintf(stderr, "inl: port=0x%04x\n", address); #endif return 0xffffffff; } void default_ioport_writel(CPUX86State *env, uint32_t address, uint32_t data) { #ifdef DEBUG_UNUSED_IOPORT fprintf(stderr, "outl: port=0x%04x data=0x%02x\n", address, data); #endif } void init_ioports(void) { int i; for(i = 0; i < MAX_IOPORTS; i++) { ioport_read_table[0][i] = default_ioport_readb; ioport_write_table[0][i] = default_ioport_writeb; ioport_read_table[1][i] = default_ioport_readw; ioport_write_table[1][i] = default_ioport_writew; ioport_read_table[2][i] = default_ioport_readl; ioport_write_table[2][i] = default_ioport_writel; } } /* size is the word size in byte */ int register_ioport_read(int start, int length, IOPortReadFunc *func, int size) { int i, bsize; if (size == 1) bsize = 0; else if (size == 2) bsize = 1; else if (size == 4) bsize = 2; else return -1; for(i = start; i < start + length; i += size) ioport_read_table[bsize][i] = func; return 0; } /* size is the word size in byte */ int register_ioport_write(int start, int length, IOPortWriteFunc *func, int size) { int i, bsize; if (size == 1) bsize = 0; else if (size == 2) bsize = 1; else if (size == 4) bsize = 2; else return -1; for(i = start; i < start + length; i += size) ioport_write_table[bsize][i] = func; return 0; } void pstrcpy(char *buf, int buf_size, const char *str) { int c; char *q = buf; if (buf_size <= 0) return; for(;;) { c = *str++; if (c == 0 || q >= buf + buf_size - 1) break; *q++ = c; } *q = '\0'; } /* strcat and truncate. */ char *pstrcat(char *buf, int buf_size, const char *s) { int len; len = strlen(buf); if (len < buf_size) pstrcpy(buf + len, buf_size - len, s); return buf; } int load_kernel(const char *filename, uint8_t *addr) { int fd, size, setup_sects; uint8_t bootsect[512]; fd = open(filename, O_RDONLY); if (fd < 0) return -1; if (read(fd, bootsect, 512) != 512) goto fail; setup_sects = bootsect[0x1F1]; if (!setup_sects) setup_sects = 4; /* skip 16 bit setup code */ lseek(fd, (setup_sects + 1) * 512, SEEK_SET); size = read(fd, addr, 16 * 1024 * 1024); if (size < 0) goto fail; close(fd); return size; fail: close(fd); return -1; } /* return the size or -1 if error */ int load_image(const char *filename, uint8_t *addr) { int fd, size; fd = open(filename, O_RDONLY); if (fd < 0) return -1; size = lseek(fd, 0, SEEK_END); lseek(fd, 0, SEEK_SET); if (read(fd, addr, size) != size) { close(fd); return -1; } close(fd); return size; } void cpu_x86_outb(CPUX86State *env, int addr, int val) { ioport_write_table[0][addr & (MAX_IOPORTS - 1)](env, addr, val); } void cpu_x86_outw(CPUX86State *env, int addr, int val) { ioport_write_table[1][addr & (MAX_IOPORTS - 1)](env, addr, val); } void cpu_x86_outl(CPUX86State *env, int addr, int val) { ioport_write_table[2][addr & (MAX_IOPORTS - 1)](env, addr, val); } int cpu_x86_inb(CPUX86State *env, int addr) { return ioport_read_table[0][addr & (MAX_IOPORTS - 1)](env, addr); } int cpu_x86_inw(CPUX86State *env, int addr) { return ioport_read_table[1][addr & (MAX_IOPORTS - 1)](env, addr); } int cpu_x86_inl(CPUX86State *env, int addr) { return ioport_read_table[2][addr & (MAX_IOPORTS - 1)](env, addr); } /***********************************************************/ void ioport80_write(CPUX86State *env, uint32_t addr, uint32_t data) { } void hw_error(const char *fmt, ...) { va_list ap; va_start(ap, fmt); fprintf(stderr, "qemu: hardware error: "); vfprintf(stderr, fmt, ap); fprintf(stderr, "\n"); #ifdef TARGET_I386 cpu_x86_dump_state(global_env, stderr, X86_DUMP_FPU | X86_DUMP_CCOP); #endif va_end(ap); abort(); } /***********************************************************/ /* cmos emulation */ #define RTC_SECONDS 0 #define RTC_SECONDS_ALARM 1 #define RTC_MINUTES 2 #define RTC_MINUTES_ALARM 3 #define RTC_HOURS 4 #define RTC_HOURS_ALARM 5 #define RTC_ALARM_DONT_CARE 0xC0 #define RTC_DAY_OF_WEEK 6 #define RTC_DAY_OF_MONTH 7 #define RTC_MONTH 8 #define RTC_YEAR 9 #define RTC_REG_A 10 #define RTC_REG_B 11 #define RTC_REG_C 12 #define RTC_REG_D 13 /* PC cmos mappings */ #define REG_EQUIPMENT_BYTE 0x14 uint8_t cmos_data[128]; uint8_t cmos_index; void cmos_ioport_write(CPUX86State *env, uint32_t addr, uint32_t data) { if (addr == 0x70) { cmos_index = data & 0x7f; } } uint32_t cmos_ioport_read(CPUX86State *env, uint32_t addr) { int ret; if (addr == 0x70) { return 0xff; } else { /* toggle update-in-progress bit for Linux (same hack as plex86) */ ret = cmos_data[cmos_index]; if (cmos_index == RTC_REG_A) cmos_data[RTC_REG_A] ^= 0x80; else if (cmos_index == RTC_REG_C) cmos_data[RTC_REG_C] = 0x00; return ret; } } static inline int to_bcd(int a) { return ((a / 10) << 4) | (a % 10); } void cmos_init(void) { struct tm *tm; time_t ti; int val; ti = time(NULL); tm = gmtime(&ti); cmos_data[RTC_SECONDS] = to_bcd(tm->tm_sec); cmos_data[RTC_MINUTES] = to_bcd(tm->tm_min); cmos_data[RTC_HOURS] = to_bcd(tm->tm_hour); cmos_data[RTC_DAY_OF_WEEK] = to_bcd(tm->tm_wday); cmos_data[RTC_DAY_OF_MONTH] = to_bcd(tm->tm_mday); cmos_data[RTC_MONTH] = to_bcd(tm->tm_mon + 1); cmos_data[RTC_YEAR] = to_bcd(tm->tm_year % 100); cmos_data[RTC_REG_A] = 0x26; cmos_data[RTC_REG_B] = 0x02; cmos_data[RTC_REG_C] = 0x00; cmos_data[RTC_REG_D] = 0x80; /* various important CMOS locations needed by PC/Bochs bios */ cmos_data[REG_EQUIPMENT_BYTE] = 0x02; /* FPU is there */ cmos_data[REG_EQUIPMENT_BYTE] |= 0x04; /* PS/2 mouse installed */ /* memory size */ val = (phys_ram_size / 1024) - 1024; if (val > 65535) val = 65535; cmos_data[0x17] = val; cmos_data[0x18] = val >> 8; cmos_data[0x30] = val; cmos_data[0x31] = val >> 8; val = (phys_ram_size / 65536) - ((16 * 1024 * 1024) / 65536); if (val > 65535) val = 65535; cmos_data[0x34] = val; cmos_data[0x35] = val >> 8; switch(boot_device) { case 'a': cmos_data[0x3d] = 0x01; /* floppy boot */ break; default: case 'c': cmos_data[0x3d] = 0x02; /* hard drive boot */ break; case 'd': cmos_data[0x3d] = 0x03; /* CD-ROM boot */ break; } register_ioport_write(0x70, 2, cmos_ioport_write, 1); register_ioport_read(0x70, 2, cmos_ioport_read, 1); } /***********************************************************/ /* 8259 pic emulation */ typedef struct PicState { uint8_t last_irr; /* edge detection */ uint8_t irr; /* interrupt request register */ uint8_t imr; /* interrupt mask register */ uint8_t isr; /* interrupt service register */ uint8_t priority_add; /* used to compute irq priority */ uint8_t irq_base; uint8_t read_reg_select; uint8_t special_mask; uint8_t init_state; uint8_t auto_eoi; uint8_t rotate_on_autoeoi; uint8_t init4; /* true if 4 byte init */ } PicState; /* 0 is master pic, 1 is slave pic */ PicState pics[2]; int pic_irq_requested; /* set irq level. If an edge is detected, then the IRR is set to 1 */ static inline void pic_set_irq1(PicState *s, int irq, int level) { int mask; mask = 1 << irq; if (level) { if ((s->last_irr & mask) == 0) s->irr |= mask; s->last_irr |= mask; } else { s->last_irr &= ~mask; } } static inline int get_priority(PicState *s, int mask) { int priority; if (mask == 0) return -1; priority = 7; while ((mask & (1 << ((priority + s->priority_add) & 7))) == 0) priority--; return priority; } /* return the pic wanted interrupt. return -1 if none */ static int pic_get_irq(PicState *s) { int mask, cur_priority, priority; mask = s->irr & ~s->imr; priority = get_priority(s, mask); if (priority < 0) return -1; /* compute current priority */ cur_priority = get_priority(s, s->isr); if (priority > cur_priority) { /* higher priority found: an irq should be generated */ return priority; } else { return -1; } } /* raise irq to CPU if necessary. must be called every time the active irq may change */ static void pic_update_irq(void) { int irq2, irq; /* first look at slave pic */ irq2 = pic_get_irq(&pics[1]); if (irq2 >= 0) { /* if irq request by slave pic, signal master PIC */ pic_set_irq1(&pics[0], 2, 1); pic_set_irq1(&pics[0], 2, 0); } /* look at requested irq */ irq = pic_get_irq(&pics[0]); if (irq >= 0) { if (irq == 2) { /* from slave pic */ pic_irq_requested = 8 + irq2; } else { /* from master pic */ pic_irq_requested = irq; } cpu_x86_interrupt(global_env, CPU_INTERRUPT_HARD); } } #ifdef DEBUG_IRQ_LATENCY int64_t irq_time[16]; int64_t cpu_get_ticks(void); #endif #if defined(DEBUG_PIC) int irq_level[16]; #endif void pic_set_irq(int irq, int level) { #if defined(DEBUG_PIC) if (level != irq_level[irq]) { printf("pic_set_irq: irq=%d level=%d\n", irq, level); irq_level[irq] = level; } #endif #ifdef DEBUG_IRQ_LATENCY if (level) { irq_time[irq] = cpu_get_ticks(); } #endif pic_set_irq1(&pics[irq >> 3], irq & 7, level); pic_update_irq(); } int cpu_x86_get_pic_interrupt(CPUX86State *env) { int irq, irq2, intno; /* signal the pic that the irq was acked by the CPU */ irq = pic_irq_requested; #ifdef DEBUG_IRQ_LATENCY printf("IRQ%d latency=%0.3fus\n", irq, (double)(cpu_get_ticks() - irq_time[irq]) * 1000000.0 / ticks_per_sec); #endif #ifdef DEBUG_PIC printf("pic_interrupt: irq=%d\n", irq); #endif if (irq >= 8) { irq2 = irq & 7; pics[1].isr |= (1 << irq2); pics[1].irr &= ~(1 << irq2); irq = 2; intno = pics[1].irq_base + irq2; } else { intno = pics[0].irq_base + irq; } pics[0].isr |= (1 << irq); pics[0].irr &= ~(1 << irq); return intno; } void pic_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val) { PicState *s; int priority; #ifdef DEBUG_PIC printf("pic_write: addr=0x%02x val=0x%02x\n", addr, val); #endif s = &pics[addr >> 7]; addr &= 1; if (addr == 0) { if (val & 0x10) { /* init */ memset(s, 0, sizeof(PicState)); s->init_state = 1; s->init4 = val & 1; if (val & 0x02) hw_error("single mode not supported"); if (val & 0x08) hw_error("level sensitive irq not supported"); } else if (val & 0x08) { if (val & 0x02) s->read_reg_select = val & 1; if (val & 0x40) s->special_mask = (val >> 5) & 1; } else { switch(val) { case 0x00: case 0x80: s->rotate_on_autoeoi = val >> 7; break; case 0x20: /* end of interrupt */ case 0xa0: priority = get_priority(s, s->isr); if (priority >= 0) { s->isr &= ~(1 << ((priority + s->priority_add) & 7)); } if (val == 0xa0) s->priority_add = (s->priority_add + 1) & 7; pic_update_irq(); break; case 0x60 ... 0x67: priority = val & 7; s->isr &= ~(1 << priority); pic_update_irq(); break; case 0xc0 ... 0xc7: s->priority_add = (val + 1) & 7; pic_update_irq(); break; case 0xe0 ... 0xe7: priority = val & 7; s->isr &= ~(1 << priority); s->priority_add = (priority + 1) & 7; pic_update_irq(); break; } } } else { switch(s->init_state) { case 0: /* normal mode */ s->imr = val; pic_update_irq(); break; case 1: s->irq_base = val & 0xf8; s->init_state = 2; break; case 2: if (s->init4) { s->init_state = 3; } else { s->init_state = 0; } break; case 3: s->auto_eoi = (val >> 1) & 1; s->init_state = 0; break; } } } uint32_t pic_ioport_read(CPUX86State *env, uint32_t addr1) { PicState *s; unsigned int addr; int ret; addr = addr1; s = &pics[addr >> 7]; addr &= 1; if (addr == 0) { if (s->read_reg_select) ret = s->isr; else ret = s->irr; } else { ret = s->imr; } #ifdef DEBUG_PIC printf("pic_read: addr=0x%02x val=0x%02x\n", addr1, ret); #endif return ret; } void pic_init(void) { register_ioport_write(0x20, 2, pic_ioport_write, 1); register_ioport_read(0x20, 2, pic_ioport_read, 1); register_ioport_write(0xa0, 2, pic_ioport_write, 1); register_ioport_read(0xa0, 2, pic_ioport_read, 1); } /***********************************************************/ /* 8253 PIT emulation */ #define PIT_FREQ 1193182 #define RW_STATE_LSB 0 #define RW_STATE_MSB 1 #define RW_STATE_WORD0 2 #define RW_STATE_WORD1 3 #define RW_STATE_LATCHED_WORD0 4 #define RW_STATE_LATCHED_WORD1 5 typedef struct PITChannelState { int count; /* can be 65536 */ uint16_t latched_count; uint8_t rw_state; uint8_t mode; uint8_t bcd; /* not supported */ uint8_t gate; /* timer start */ int64_t count_load_time; int64_t count_last_edge_check_time; } PITChannelState; PITChannelState pit_channels[3]; int speaker_data_on; int dummy_refresh_clock; int pit_min_timer_count = 0; #if defined(__powerpc__) static inline uint32_t get_tbl(void) { uint32_t tbl; asm volatile("mftb %0" : "=r" (tbl)); return tbl; } static inline uint32_t get_tbu(void) { uint32_t tbl; asm volatile("mftbu %0" : "=r" (tbl)); return tbl; } int64_t cpu_get_real_ticks(void) { uint32_t l, h, h1; /* NOTE: we test if wrapping has occurred */ do { h = get_tbu(); l = get_tbl(); h1 = get_tbu(); } while (h != h1); return ((int64_t)h << 32) | l; } #elif defined(__i386__) int64_t cpu_get_real_ticks(void) { int64_t val; asm("rdtsc" : "=A" (val)); return val; } #else #error unsupported CPU #endif static int64_t cpu_ticks_offset; static int64_t cpu_ticks_last; int64_t cpu_get_ticks(void) { return cpu_get_real_ticks() + cpu_ticks_offset; } /* enable cpu_get_ticks() */ void cpu_enable_ticks(void) { cpu_ticks_offset = cpu_ticks_last - cpu_get_real_ticks(); } /* disable cpu_get_ticks() : the clock is stopped. You must not call cpu_get_ticks() after that. */ void cpu_disable_ticks(void) { cpu_ticks_last = cpu_get_ticks(); } int64_t get_clock(void) { struct timeval tv; gettimeofday(&tv, NULL); return tv.tv_sec * 1000000LL + tv.tv_usec; } void cpu_calibrate_ticks(void) { int64_t usec, ticks; usec = get_clock(); ticks = cpu_get_ticks(); usleep(50 * 1000); usec = get_clock() - usec; ticks = cpu_get_ticks() - ticks; ticks_per_sec = (ticks * 1000000LL + (usec >> 1)) / usec; } /* compute with 96 bit intermediate result: (a*b)/c */ static uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c) { union { uint64_t ll; struct { #ifdef WORDS_BIGENDIAN uint32_t high, low; #else uint32_t low, high; #endif } l; } u, res; uint64_t rl, rh; u.ll = a; rl = (uint64_t)u.l.low * (uint64_t)b; rh = (uint64_t)u.l.high * (uint64_t)b; rh += (rl >> 32); res.l.high = rh / c; res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c; return res.ll; } static int pit_get_count(PITChannelState *s) { uint64_t d; int counter; d = muldiv64(cpu_get_ticks() - s->count_load_time, PIT_FREQ, ticks_per_sec); switch(s->mode) { case 0: case 1: case 4: case 5: counter = (s->count - d) & 0xffff; break; default: counter = s->count - (d % s->count); break; } return counter; } /* get pit output bit */ static int pit_get_out(PITChannelState *s) { uint64_t d; int out; d = muldiv64(cpu_get_ticks() - s->count_load_time, PIT_FREQ, ticks_per_sec); switch(s->mode) { default: case 0: out = (d >= s->count); break; case 1: out = (d < s->count); break; case 2: if ((d % s->count) == 0 && d != 0) out = 1; else out = 0; break; case 3: out = (d % s->count) < (s->count >> 1); break; case 4: case 5: out = (d == s->count); break; } return out; } /* get the number of 0 to 1 transitions we had since we call this function */ /* XXX: maybe better to use ticks precision to avoid getting edges twice if checks are done at very small intervals */ static int pit_get_out_edges(PITChannelState *s) { uint64_t d1, d2; int64_t ticks; int ret, v; ticks = cpu_get_ticks(); d1 = muldiv64(s->count_last_edge_check_time - s->count_load_time, PIT_FREQ, ticks_per_sec); d2 = muldiv64(ticks - s->count_load_time, PIT_FREQ, ticks_per_sec); s->count_last_edge_check_time = ticks; switch(s->mode) { default: case 0: if (d1 < s->count && d2 >= s->count) ret = 1; else ret = 0; break; case 1: ret = 0; break; case 2: d1 /= s->count; d2 /= s->count; ret = d2 - d1; break; case 3: v = s->count - (s->count >> 1); d1 = (d1 + v) / s->count; d2 = (d2 + v) / s->count; ret = d2 - d1; break; case 4: case 5: if (d1 < s->count && d2 >= s->count) ret = 1; else ret = 0; break; } return ret; } static inline void pit_load_count(PITChannelState *s, int val) { if (val == 0) val = 0x10000; s->count_load_time = cpu_get_ticks(); s->count_last_edge_check_time = s->count_load_time; s->count = val; if (s == &pit_channels[0] && val <= pit_min_timer_count) { fprintf(stderr, "\nWARNING: qemu: 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", PIT_FREQ / pit_min_timer_count); } } void pit_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val) { int channel, access; PITChannelState *s; addr &= 3; if (addr == 3) { channel = val >> 6; if (channel == 3) return; s = &pit_channels[channel]; access = (val >> 4) & 3; switch(access) { case 0: s->latched_count = pit_get_count(s); s->rw_state = RW_STATE_LATCHED_WORD0; break; default: s->mode = (val >> 1) & 7; s->bcd = val & 1; s->rw_state = access - 1 + RW_STATE_LSB; break; } } else { s = &pit_channels[addr]; switch(s->rw_state) { case RW_STATE_LSB: pit_load_count(s, val); break; case RW_STATE_MSB: pit_load_count(s, val << 8); break; case RW_STATE_WORD0: case RW_STATE_WORD1: if (s->rw_state & 1) { pit_load_count(s, (s->latched_count & 0xff) | (val << 8)); } else { s->latched_count = val; } s->rw_state ^= 1; break; } } } uint32_t pit_ioport_read(CPUX86State *env, uint32_t addr) { int ret, count; PITChannelState *s; addr &= 3; s = &pit_channels[addr]; switch(s->rw_state) { case RW_STATE_LSB: case RW_STATE_MSB: case RW_STATE_WORD0: case RW_STATE_WORD1: count = pit_get_count(s); if (s->rw_state & 1) ret = (count >> 8) & 0xff; else ret = count & 0xff; if (s->rw_state & 2) s->rw_state ^= 1; break; default: case RW_STATE_LATCHED_WORD0: case RW_STATE_LATCHED_WORD1: if (s->rw_state & 1) ret = s->latched_count >> 8; else ret = s->latched_count & 0xff; s->rw_state ^= 1; break; } return ret; } void speaker_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val) { speaker_data_on = (val >> 1) & 1; pit_channels[2].gate = val & 1; } uint32_t speaker_ioport_read(CPUX86State *env, uint32_t addr) { int out; out = pit_get_out(&pit_channels[2]); dummy_refresh_clock ^= 1; return (speaker_data_on << 1) | pit_channels[2].gate | (out << 5) | (dummy_refresh_clock << 4); } void pit_init(void) { PITChannelState *s; int i; cpu_calibrate_ticks(); for(i = 0;i < 3; i++) { s = &pit_channels[i]; s->mode = 3; s->gate = (i != 2); pit_load_count(s, 0); } register_ioport_write(0x40, 4, pit_ioport_write, 1); register_ioport_read(0x40, 3, pit_ioport_read, 1); register_ioport_read(0x61, 1, speaker_ioport_read, 1); register_ioport_write(0x61, 1, speaker_ioport_write, 1); } /***********************************************************/ /* serial port emulation */ #define UART_IRQ 4 #define UART_LCR_DLAB 0x80 /* Divisor latch access bit */ #define UART_IER_MSI 0x08 /* Enable Modem status interrupt */ #define UART_IER_RLSI 0x04 /* Enable receiver line status interrupt */ #define UART_IER_THRI 0x02 /* Enable Transmitter holding register int. */ #define UART_IER_RDI 0x01 /* Enable receiver data interrupt */ #define UART_IIR_NO_INT 0x01 /* No interrupts pending */ #define UART_IIR_ID 0x06 /* Mask for the interrupt ID */ #define UART_IIR_MSI 0x00 /* Modem status interrupt */ #define UART_IIR_THRI 0x02 /* Transmitter holding register empty */ #define UART_IIR_RDI 0x04 /* Receiver data interrupt */ #define UART_IIR_RLSI 0x06 /* Receiver line status interrupt */ #define UART_LSR_TEMT 0x40 /* Transmitter empty */ #define UART_LSR_THRE 0x20 /* Transmit-hold-register empty */ #define UART_LSR_BI 0x10 /* Break interrupt indicator */ #define UART_LSR_FE 0x08 /* Frame error indicator */ #define UART_LSR_PE 0x04 /* Parity error indicator */ #define UART_LSR_OE 0x02 /* Overrun error indicator */ #define UART_LSR_DR 0x01 /* Receiver data ready */ typedef struct SerialState { uint8_t divider; uint8_t rbr; /* receive register */ uint8_t ier; uint8_t iir; /* read only */ uint8_t lcr; uint8_t mcr; uint8_t lsr; /* read only */ uint8_t msr; uint8_t scr; } SerialState; SerialState serial_ports[1]; void serial_update_irq(void) { SerialState *s = &serial_ports[0]; if ((s->lsr & UART_LSR_DR) && (s->ier & UART_IER_RDI)) { s->iir = UART_IIR_RDI; } else if ((s->lsr & UART_LSR_THRE) && (s->ier & UART_IER_THRI)) { s->iir = UART_IIR_THRI; } else { s->iir = UART_IIR_NO_INT; } if (s->iir != UART_IIR_NO_INT) { pic_set_irq(UART_IRQ, 1); } else { pic_set_irq(UART_IRQ, 0); } } void serial_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val) { SerialState *s = &serial_ports[0]; unsigned char ch; int ret; addr &= 7; switch(addr) { default: case 0: if (s->lcr & UART_LCR_DLAB) { s->divider = (s->divider & 0xff00) | val; } else { s->lsr &= ~UART_LSR_THRE; serial_update_irq(); ch = val; do { ret = write(1, &ch, 1); } while (ret != 1); s->lsr |= UART_LSR_THRE; s->lsr |= UART_LSR_TEMT; serial_update_irq(); } break; case 1: if (s->lcr & UART_LCR_DLAB) { s->divider = (s->divider & 0x00ff) | (val << 8); } else { s->ier = val; serial_update_irq(); } break; case 2: break; case 3: s->lcr = val; break; case 4: s->mcr = val; break; case 5: break; case 6: s->msr = val; break; case 7: s->scr = val; break; } } uint32_t serial_ioport_read(CPUX86State *env, uint32_t addr) { SerialState *s = &serial_ports[0]; uint32_t ret; addr &= 7; switch(addr) { default: case 0: if (s->lcr & UART_LCR_DLAB) { ret = s->divider & 0xff; } else { ret = s->rbr; s->lsr &= ~(UART_LSR_DR | UART_LSR_BI); serial_update_irq(); } break; case 1: if (s->lcr & UART_LCR_DLAB) { ret = (s->divider >> 8) & 0xff; } else { ret = s->ier; } break; case 2: ret = s->iir; break; case 3: ret = s->lcr; break; case 4: ret = s->mcr; break; case 5: ret = s->lsr; break; case 6: ret = s->msr; break; case 7: ret = s->scr; break; } return ret; } #define TERM_ESCAPE 0x01 /* ctrl-a is used for escape */ static int term_got_escape; void term_print_help(void) { printf("\n" "C-a h print this help\n" "C-a x exit emulatior\n" "C-a s save disk data back to file (if -snapshot)\n" "C-a b send break (magic sysrq)\n" "C-a C-a send C-a\n" ); } /* called when a char is received */ void serial_received_byte(SerialState *s, int ch) { if (term_got_escape) { term_got_escape = 0; switch(ch) { case 'h': term_print_help(); break; case 'x': exit(0); break; case 's': { int i; for (i = 0; i < MAX_DISKS; i++) { if (bs_table[i]) bdrv_commit(bs_table[i]); } } break; case 'b': /* send break */ s->rbr = 0; s->lsr |= UART_LSR_BI | UART_LSR_DR; serial_update_irq(); break; case TERM_ESCAPE: goto send_char; } } else if (ch == TERM_ESCAPE) { term_got_escape = 1; } else { send_char: s->rbr = ch; s->lsr |= UART_LSR_DR; serial_update_irq(); } } void serial_init(void) { SerialState *s = &serial_ports[0]; s->lsr = UART_LSR_TEMT | UART_LSR_THRE; register_ioport_write(0x3f8, 8, serial_ioport_write, 1); register_ioport_read(0x3f8, 8, serial_ioport_read, 1); } /***********************************************************/ /* ne2000 emulation */ #define NE2000_IOPORT 0x300 #define NE2000_IRQ 9 #define MAX_ETH_FRAME_SIZE 1514 #define E8390_CMD 0x00 /* The command register (for all pages) */ /* Page 0 register offsets. */ #define EN0_CLDALO 0x01 /* Low byte of current local dma addr RD */ #define EN0_STARTPG 0x01 /* Starting page of ring bfr WR */ #define EN0_CLDAHI 0x02 /* High byte of current local dma addr RD */ #define EN0_STOPPG 0x02 /* Ending page +1 of ring bfr WR */ #define EN0_BOUNDARY 0x03 /* Boundary page of ring bfr RD WR */ #define EN0_TSR 0x04 /* Transmit status reg RD */ #define EN0_TPSR 0x04 /* Transmit starting page WR */ #define EN0_NCR 0x05 /* Number of collision reg RD */ #define EN0_TCNTLO 0x05 /* Low byte of tx byte count WR */ #define EN0_FIFO 0x06 /* FIFO RD */ #define EN0_TCNTHI 0x06 /* High byte of tx byte count WR */ #define EN0_ISR 0x07 /* Interrupt status reg RD WR */ #define EN0_CRDALO 0x08 /* low byte of current remote dma address RD */ #define EN0_RSARLO 0x08 /* Remote start address reg 0 */ #define EN0_CRDAHI 0x09 /* high byte, current remote dma address RD */ #define EN0_RSARHI 0x09 /* Remote start address reg 1 */ #define EN0_RCNTLO 0x0a /* Remote byte count reg WR */ #define EN0_RCNTHI 0x0b /* Remote byte count reg WR */ #define EN0_RSR 0x0c /* rx status reg RD */ #define EN0_RXCR 0x0c /* RX configuration reg WR */ #define EN0_TXCR 0x0d /* TX configuration reg WR */ #define EN0_COUNTER0 0x0d /* Rcv alignment error counter RD */ #define EN0_DCFG 0x0e /* Data configuration reg WR */ #define EN0_COUNTER1 0x0e /* Rcv CRC error counter RD */ #define EN0_IMR 0x0f /* Interrupt mask reg WR */ #define EN0_COUNTER2 0x0f /* Rcv missed frame error counter RD */ #define EN1_PHYS 0x11 #define EN1_CURPAG 0x17 #define EN1_MULT 0x18 /* Register accessed at EN_CMD, the 8390 base addr. */ #define E8390_STOP 0x01 /* Stop and reset the chip */ #define E8390_START 0x02 /* Start the chip, clear reset */ #define E8390_TRANS 0x04 /* Transmit a frame */ #define E8390_RREAD 0x08 /* Remote read */ #define E8390_RWRITE 0x10 /* Remote write */ #define E8390_NODMA 0x20 /* Remote DMA */ #define E8390_PAGE0 0x00 /* Select page chip registers */ #define E8390_PAGE1 0x40 /* using the two high-order bits */ #define E8390_PAGE2 0x80 /* Page 3 is invalid. */ /* Bits in EN0_ISR - Interrupt status register */ #define ENISR_RX 0x01 /* Receiver, no error */ #define ENISR_TX 0x02 /* Transmitter, no error */ #define ENISR_RX_ERR 0x04 /* Receiver, with error */ #define ENISR_TX_ERR 0x08 /* Transmitter, with error */ #define ENISR_OVER 0x10 /* Receiver overwrote the ring */ #define ENISR_COUNTERS 0x20 /* Counters need emptying */ #define ENISR_RDC 0x40 /* remote dma complete */ #define ENISR_RESET 0x80 /* Reset completed */ #define ENISR_ALL 0x3f /* Interrupts we will enable */ /* Bits in received packet status byte and EN0_RSR*/ #define ENRSR_RXOK 0x01 /* Received a good packet */ #define ENRSR_CRC 0x02 /* CRC error */ #define ENRSR_FAE 0x04 /* frame alignment error */ #define ENRSR_FO 0x08 /* FIFO overrun */ #define ENRSR_MPA 0x10 /* missed pkt */ #define ENRSR_PHY 0x20 /* physical/multicast address */ #define ENRSR_DIS 0x40 /* receiver disable. set in monitor mode */ #define ENRSR_DEF 0x80 /* deferring */ /* Transmitted packet status, EN0_TSR. */ #define ENTSR_PTX 0x01 /* Packet transmitted without error */ #define ENTSR_ND 0x02 /* The transmit wasn't deferred. */ #define ENTSR_COL 0x04 /* The transmit collided at least once. */ #define ENTSR_ABT 0x08 /* The transmit collided 16 times, and was deferred. */ #define ENTSR_CRS 0x10 /* The carrier sense was lost. */ #define ENTSR_FU 0x20 /* A "FIFO underrun" occurred during transmit. */ #define ENTSR_CDH 0x40 /* The collision detect "heartbeat" signal was lost. */ #define ENTSR_OWC 0x80 /* There was an out-of-window collision. */ #define NE2000_MEM_SIZE 32768 typedef struct NE2000State { uint8_t cmd; uint32_t start; uint32_t stop; uint8_t boundary; uint8_t tsr; uint8_t tpsr; uint16_t tcnt; uint16_t rcnt; uint32_t rsar; uint8_t isr; uint8_t dcfg; uint8_t imr; uint8_t phys[6]; /* mac address */ uint8_t curpag; uint8_t mult[8]; /* multicast mask array */ uint8_t mem[NE2000_MEM_SIZE]; } NE2000State; NE2000State ne2000_state; int net_fd = -1; char network_script[1024]; void ne2000_reset(void) { NE2000State *s = &ne2000_state; int i; s->isr = ENISR_RESET; s->mem[0] = 0x52; s->mem[1] = 0x54; s->mem[2] = 0x00; s->mem[3] = 0x12; s->mem[4] = 0x34; s->mem[5] = 0x56; s->mem[14] = 0x57; s->mem[15] = 0x57; /* duplicate prom data */ for(i = 15;i >= 0; i--) { s->mem[2 * i] = s->mem[i]; s->mem[2 * i + 1] = s->mem[i]; } } void ne2000_update_irq(NE2000State *s) { int isr; isr = s->isr & s->imr; if (isr) pic_set_irq(NE2000_IRQ, 1); else pic_set_irq(NE2000_IRQ, 0); } int net_init(void) { struct ifreq ifr; int fd, ret, pid, status; fd = open("/dev/net/tun", O_RDWR); if (fd < 0) { fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n"); return -1; } memset(&ifr, 0, sizeof(ifr)); ifr.ifr_flags = IFF_TAP | IFF_NO_PI; pstrcpy(ifr.ifr_name, IFNAMSIZ, "tun%d"); ret = ioctl(fd, TUNSETIFF, (void *) &ifr); if (ret != 0) { fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n"); close(fd); return -1; } printf("Connected to host network interface: %s\n", ifr.ifr_name); fcntl(fd, F_SETFL, O_NONBLOCK); net_fd = fd; /* try to launch network init script */ pid = fork(); if (pid >= 0) { if (pid == 0) { execl(network_script, network_script, ifr.ifr_name, NULL); exit(1); } while (waitpid(pid, &status, 0) != pid); if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { fprintf(stderr, "%s: could not launch network script for '%s'\n", network_script, ifr.ifr_name); } } return 0; } void net_send_packet(NE2000State *s, const uint8_t *buf, int size) { #ifdef DEBUG_NE2000 printf("NE2000: sending packet size=%d\n", size); #endif write(net_fd, buf, size); } /* return true if the NE2000 can receive more data */ int ne2000_can_receive(NE2000State *s) { int avail, index, boundary; if (s->cmd & E8390_STOP) return 0; index = s->curpag << 8; boundary = s->boundary << 8; if (index < boundary) avail = boundary - index; else avail = (s->stop - s->start) - (index - boundary); if (avail < (MAX_ETH_FRAME_SIZE + 4)) return 0; return 1; } void ne2000_receive(NE2000State *s, uint8_t *buf, int size) { uint8_t *p; int total_len, next, avail, len, index; #if defined(DEBUG_NE2000) printf("NE2000: received len=%d\n", size); #endif index = s->curpag << 8; /* 4 bytes for header */ total_len = size + 4; /* address for next packet (4 bytes for CRC) */ next = index + ((total_len + 4 + 255) & ~0xff); if (next >= s->stop) next -= (s->stop - s->start); /* prepare packet header */ p = s->mem + index; p[0] = ENRSR_RXOK; /* receive status */ p[1] = next >> 8; p[2] = total_len; p[3] = total_len >> 8; index += 4; /* write packet data */ while (size > 0) { avail = s->stop - index; len = size; if (len > avail) len = avail; memcpy(s->mem + index, buf, len); buf += len; index += len; if (index == s->stop) index = s->start; size -= len; } s->curpag = next >> 8; /* now we can signal we have receive something */ s->isr |= ENISR_RX; ne2000_update_irq(s); } void ne2000_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val) { NE2000State *s = &ne2000_state; int offset, page; addr &= 0xf; #ifdef DEBUG_NE2000 printf("NE2000: write addr=0x%x val=0x%02x\n", addr, val); #endif if (addr == E8390_CMD) { /* control register */ s->cmd = val; if (val & E8390_START) { /* test specific case: zero length transfert */ if ((val & (E8390_RREAD | E8390_RWRITE)) && s->rcnt == 0) { s->isr |= ENISR_RDC; ne2000_update_irq(s); } if (val & E8390_TRANS) { net_send_packet(s, s->mem + (s->tpsr << 8), s->tcnt); /* signal end of transfert */ s->tsr = ENTSR_PTX; s->isr |= ENISR_TX; ne2000_update_irq(s); } } } else { page = s->cmd >> 6; offset = addr | (page << 4); switch(offset) { case EN0_STARTPG: s->start = val << 8; break; case EN0_STOPPG: s->stop = val << 8; break; case EN0_BOUNDARY: s->boundary = val; break; case EN0_IMR: s->imr = val; ne2000_update_irq(s); break; case EN0_TPSR: s->tpsr = val; break; case EN0_TCNTLO: s->tcnt = (s->tcnt & 0xff00) | val; break; case EN0_TCNTHI: s->tcnt = (s->tcnt & 0x00ff) | (val << 8); break; case EN0_RSARLO: s->rsar = (s->rsar & 0xff00) | val; break; case EN0_RSARHI: s->rsar = (s->rsar & 0x00ff) | (val << 8); break; case EN0_RCNTLO: s->rcnt = (s->rcnt & 0xff00) | val; break; case EN0_RCNTHI: s->rcnt = (s->rcnt & 0x00ff) | (val << 8); break; case EN0_DCFG: s->dcfg = val; break; case EN0_ISR: s->isr &= ~val; ne2000_update_irq(s); break; case EN1_PHYS ... EN1_PHYS + 5: s->phys[offset - EN1_PHYS] = val; break; case EN1_CURPAG: s->curpag = val; break; case EN1_MULT ... EN1_MULT + 7: s->mult[offset - EN1_MULT] = val; break; } } } uint32_t ne2000_ioport_read(CPUX86State *env, uint32_t addr) { NE2000State *s = &ne2000_state; int offset, page, ret; addr &= 0xf; if (addr == E8390_CMD) { ret = s->cmd; } else { page = s->cmd >> 6; offset = addr | (page << 4); switch(offset) { case EN0_TSR: ret = s->tsr; break; case EN0_BOUNDARY: ret = s->boundary; break; case EN0_ISR: ret = s->isr; break; case EN1_PHYS ... EN1_PHYS + 5: ret = s->phys[offset - EN1_PHYS]; break; case EN1_CURPAG: ret = s->curpag; break; case EN1_MULT ... EN1_MULT + 7: ret = s->mult[offset - EN1_MULT]; break; default: ret = 0x00; break; } } #ifdef DEBUG_NE2000 printf("NE2000: read addr=0x%x val=%02x\n", addr, ret); #endif return ret; } void ne2000_asic_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val) { NE2000State *s = &ne2000_state; uint8_t *p; #ifdef DEBUG_NE2000 printf("NE2000: asic write val=0x%04x\n", val); #endif p = s->mem + s->rsar; if (s->dcfg & 0x01) { /* 16 bit access */ p[0] = val; p[1] = val >> 8; s->rsar += 2; s->rcnt -= 2; } else { /* 8 bit access */ p[0] = val; s->rsar++; s->rcnt--; } /* wrap */ if (s->rsar == s->stop) s->rsar = s->start; if (s->rcnt == 0) { /* signal end of transfert */ s->isr |= ENISR_RDC; ne2000_update_irq(s); } } uint32_t ne2000_asic_ioport_read(CPUX86State *env, uint32_t addr) { NE2000State *s = &ne2000_state; uint8_t *p; int ret; p = s->mem + s->rsar; if (s->dcfg & 0x01) { /* 16 bit access */ ret = p[0] | (p[1] << 8); s->rsar += 2; s->rcnt -= 2; } else { /* 8 bit access */ ret = p[0]; s->rsar++; s->rcnt--; } /* wrap */ if (s->rsar == s->stop) s->rsar = s->start; if (s->rcnt == 0) { /* signal end of transfert */ s->isr |= ENISR_RDC; ne2000_update_irq(s); } #ifdef DEBUG_NE2000 printf("NE2000: asic read val=0x%04x\n", ret); #endif return ret; } void ne2000_reset_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val) { /* nothing to do (end of reset pulse) */ } uint32_t ne2000_reset_ioport_read(CPUX86State *env, uint32_t addr) { ne2000_reset(); return 0; } void ne2000_init(void) { register_ioport_write(NE2000_IOPORT, 16, ne2000_ioport_write, 1); register_ioport_read(NE2000_IOPORT, 16, ne2000_ioport_read, 1); register_ioport_write(NE2000_IOPORT + 0x10, 1, ne2000_asic_ioport_write, 1); register_ioport_read(NE2000_IOPORT + 0x10, 1, ne2000_asic_ioport_read, 1); register_ioport_write(NE2000_IOPORT + 0x10, 2, ne2000_asic_ioport_write, 2); register_ioport_read(NE2000_IOPORT + 0x10, 2, ne2000_asic_ioport_read, 2); register_ioport_write(NE2000_IOPORT + 0x1f, 1, ne2000_reset_ioport_write, 1); register_ioport_read(NE2000_IOPORT + 0x1f, 1, ne2000_reset_ioport_read, 1); ne2000_reset(); } /***********************************************************/ /* keyboard emulation */ /* Keyboard Controller Commands */ #define KBD_CCMD_READ_MODE 0x20 /* Read mode bits */ #define KBD_CCMD_WRITE_MODE 0x60 /* Write mode bits */ #define KBD_CCMD_GET_VERSION 0xA1 /* Get controller version */ #define KBD_CCMD_MOUSE_DISABLE 0xA7 /* Disable mouse interface */ #define KBD_CCMD_MOUSE_ENABLE 0xA8 /* Enable mouse interface */ #define KBD_CCMD_TEST_MOUSE 0xA9 /* Mouse interface test */ #define KBD_CCMD_SELF_TEST 0xAA /* Controller self test */ #define KBD_CCMD_KBD_TEST 0xAB /* Keyboard interface test */ #define KBD_CCMD_KBD_DISABLE 0xAD /* Keyboard interface disable */ #define KBD_CCMD_KBD_ENABLE 0xAE /* Keyboard interface enable */ #define KBD_CCMD_READ_INPORT 0xC0 /* read input port */ #define KBD_CCMD_READ_OUTPORT 0xD0 /* read output port */ #define KBD_CCMD_WRITE_OUTPORT 0xD1 /* write output port */ #define KBD_CCMD_WRITE_OBUF 0xD2 #define KBD_CCMD_WRITE_AUX_OBUF 0xD3 /* Write to output buffer as if initiated by the auxiliary device */ #define KBD_CCMD_WRITE_MOUSE 0xD4 /* Write the following byte to the mouse */ #define KBD_CCMD_DISABLE_A20 0xDD /* HP vectra only ? */ #define KBD_CCMD_ENABLE_A20 0xDF /* HP vectra only ? */ #define KBD_CCMD_RESET 0xFE /* Keyboard Commands */ #define KBD_CMD_SET_LEDS 0xED /* Set keyboard leds */ #define KBD_CMD_ECHO 0xEE #define KBD_CMD_SET_RATE 0xF3 /* Set typematic rate */ #define KBD_CMD_ENABLE 0xF4 /* Enable scanning */ #define KBD_CMD_RESET_DISABLE 0xF5 /* reset and disable scanning */ #define KBD_CMD_RESET_ENABLE 0xF6 /* reset and enable scanning */ #define KBD_CMD_RESET 0xFF /* Reset */ /* Keyboard Replies */ #define KBD_REPLY_POR 0xAA /* Power on reset */ #define KBD_REPLY_ACK 0xFA /* Command ACK */ #define KBD_REPLY_RESEND 0xFE /* Command NACK, send the cmd again */ /* Status Register Bits */ #define KBD_STAT_OBF 0x01 /* Keyboard output buffer full */ #define KBD_STAT_IBF 0x02 /* Keyboard input buffer full */ #define KBD_STAT_SELFTEST 0x04 /* Self test successful */ #define KBD_STAT_CMD 0x08 /* Last write was a command write (0=data) */ #define KBD_STAT_UNLOCKED 0x10 /* Zero if keyboard locked */ #define KBD_STAT_MOUSE_OBF 0x20 /* Mouse output buffer full */ #define KBD_STAT_GTO 0x40 /* General receive/xmit timeout */ #define KBD_STAT_PERR 0x80 /* Parity error */ /* Controller Mode Register Bits */ #define KBD_MODE_KBD_INT 0x01 /* Keyboard data generate IRQ1 */ #define KBD_MODE_MOUSE_INT 0x02 /* Mouse data generate IRQ12 */ #define KBD_MODE_SYS 0x04 /* The system flag (?) */ #define KBD_MODE_NO_KEYLOCK 0x08 /* The keylock doesn't affect the keyboard if set */ #define KBD_MODE_DISABLE_KBD 0x10 /* Disable keyboard interface */ #define KBD_MODE_DISABLE_MOUSE 0x20 /* Disable mouse interface */ #define KBD_MODE_KCC 0x40 /* Scan code conversion to PC format */ #define KBD_MODE_RFU 0x80 /* Mouse Commands */ #define AUX_SET_SCALE11 0xE6 /* Set 1:1 scaling */ #define AUX_SET_SCALE21 0xE7 /* Set 2:1 scaling */ #define AUX_SET_RES 0xE8 /* Set resolution */ #define AUX_GET_SCALE 0xE9 /* Get scaling factor */ #define AUX_SET_STREAM 0xEA /* Set stream mode */ #define AUX_POLL 0xEB /* Poll */ #define AUX_RESET_WRAP 0xEC /* Reset wrap mode */ #define AUX_SET_WRAP 0xEE /* Set wrap mode */ #define AUX_SET_REMOTE 0xF0 /* Set remote mode */ #define AUX_GET_TYPE 0xF2 /* Get type */ #define AUX_SET_SAMPLE 0xF3 /* Set sample rate */ #define AUX_ENABLE_DEV 0xF4 /* Enable aux device */ #define AUX_DISABLE_DEV 0xF5 /* Disable aux device */ #define AUX_SET_DEFAULT 0xF6 #define AUX_RESET 0xFF /* Reset aux device */ #define AUX_ACK 0xFA /* Command byte ACK. */ #define MOUSE_STATUS_REMOTE 0x40 #define MOUSE_STATUS_ENABLED 0x20 #define MOUSE_STATUS_SCALE21 0x10 #define KBD_QUEUE_SIZE 256 typedef struct { uint8_t data[KBD_QUEUE_SIZE]; int rptr, wptr, count; } KBDQueue; typedef struct KBDState { KBDQueue queues[2]; uint8_t write_cmd; /* if non zero, write data to port 60 is expected */ uint8_t status; uint8_t mode; /* keyboard state */ int kbd_write_cmd; int scan_enabled; /* mouse state */ int mouse_write_cmd; uint8_t mouse_status; uint8_t mouse_resolution; uint8_t mouse_sample_rate; uint8_t mouse_wrap; uint8_t mouse_type; /* 0 = PS2, 3 = IMPS/2, 4 = IMEX */ uint8_t mouse_detect_state; int mouse_dx; /* current values, needed for 'poll' mode */ int mouse_dy; int mouse_dz; uint8_t mouse_buttons; } KBDState; KBDState kbd_state; int reset_requested; /* update irq and KBD_STAT_[MOUSE_]OBF */ static void kbd_update_irq(KBDState *s) { int irq12_level, irq1_level; irq1_level = 0; irq12_level = 0; s->status &= ~(KBD_STAT_OBF | KBD_STAT_MOUSE_OBF); if (s->queues[0].count != 0 || s->queues[1].count != 0) { s->status |= KBD_STAT_OBF; if (s->queues[1].count != 0) { s->status |= KBD_STAT_MOUSE_OBF; if (s->mode & KBD_MODE_MOUSE_INT) irq12_level = 1; } else { if (s->mode & KBD_MODE_KBD_INT) irq1_level = 1; } } pic_set_irq(1, irq1_level); pic_set_irq(12, irq12_level); } static void kbd_queue(KBDState *s, int b, int aux) { KBDQueue *q = &kbd_state.queues[aux]; #if defined(DEBUG_MOUSE) || defined(DEBUG_KBD) if (aux) printf("mouse event: 0x%02x\n", b); #ifdef DEBUG_KBD else printf("kbd event: 0x%02x\n", b); #endif #endif if (q->count >= KBD_QUEUE_SIZE) return; q->data[q->wptr] = b; if (++q->wptr == KBD_QUEUE_SIZE) q->wptr = 0; q->count++; kbd_update_irq(s); } void kbd_put_keycode(int keycode) { KBDState *s = &kbd_state; kbd_queue(s, keycode, 0); } uint32_t kbd_read_status(CPUX86State *env, uint32_t addr) { KBDState *s = &kbd_state; int val; val = s->status; #if defined(DEBUG_KBD) && 0 printf("kbd: read status=0x%02x\n", val); #endif return val; } void kbd_write_command(CPUX86State *env, uint32_t addr, uint32_t val) { KBDState *s = &kbd_state; #ifdef DEBUG_KBD printf("kbd: write cmd=0x%02x\n", val); #endif switch(val) { case KBD_CCMD_READ_MODE: kbd_queue(s, s->mode, 0); break; case KBD_CCMD_WRITE_MODE: case KBD_CCMD_WRITE_OBUF: case KBD_CCMD_WRITE_AUX_OBUF: case KBD_CCMD_WRITE_MOUSE: case KBD_CCMD_WRITE_OUTPORT: s->write_cmd = val; break; case KBD_CCMD_MOUSE_DISABLE: s->mode |= KBD_MODE_DISABLE_MOUSE; break; case KBD_CCMD_MOUSE_ENABLE: s->mode &= ~KBD_MODE_DISABLE_MOUSE; break; case KBD_CCMD_TEST_MOUSE: kbd_queue(s, 0x00, 0); break; case KBD_CCMD_SELF_TEST: s->status |= KBD_STAT_SELFTEST; kbd_queue(s, 0x55, 0); break; case KBD_CCMD_KBD_TEST: kbd_queue(s, 0x00, 0); break; case KBD_CCMD_KBD_DISABLE: s->mode |= KBD_MODE_DISABLE_KBD; break; case KBD_CCMD_KBD_ENABLE: s->mode &= ~KBD_MODE_DISABLE_KBD; break; case KBD_CCMD_READ_INPORT: kbd_queue(s, 0x00, 0); break; case KBD_CCMD_READ_OUTPORT: /* XXX: check that */ val = 0x01 | (a20_enabled << 1); if (s->status & KBD_STAT_OBF) val |= 0x10; if (s->status & KBD_STAT_MOUSE_OBF) val |= 0x20; kbd_queue(s, val, 0); break; case KBD_CCMD_ENABLE_A20: cpu_x86_set_a20(env, 1); break; case KBD_CCMD_DISABLE_A20: cpu_x86_set_a20(env, 0); break; case KBD_CCMD_RESET: reset_requested = 1; cpu_x86_interrupt(global_env, CPU_INTERRUPT_EXIT); break; default: fprintf(stderr, "qemu: unsupported keyboard cmd=0x%02x\n", val); break; } } uint32_t kbd_read_data(CPUX86State *env, uint32_t addr) { KBDState *s = &kbd_state; KBDQueue *q; int val; q = &s->queues[0]; /* first check KBD data */ if (q->count == 0) q = &s->queues[1]; /* then check AUX data */ if (q->count == 0) { /* XXX: return something else ? */ val = 0; } else { val = q->data[q->rptr]; if (++q->rptr == KBD_QUEUE_SIZE) q->rptr = 0; q->count--; /* reading deasserts IRQ */ if (q == &s->queues[0]) pic_set_irq(1, 0); else pic_set_irq(12, 0); } /* reassert IRQs if data left */ kbd_update_irq(s); #ifdef DEBUG_KBD printf("kbd: read data=0x%02x\n", val); #endif return val; } static void kbd_reset_keyboard(KBDState *s) { s->scan_enabled = 1; } static void kbd_write_keyboard(KBDState *s, int val) { switch(s->kbd_write_cmd) { default: case -1: switch(val) { case 0x00: kbd_queue(s, KBD_REPLY_ACK, 0); break; case 0x05: kbd_queue(s, KBD_REPLY_RESEND, 0); break; case KBD_CMD_ECHO: kbd_queue(s, KBD_CMD_ECHO, 0); break; case KBD_CMD_ENABLE: s->scan_enabled = 1; kbd_queue(s, KBD_REPLY_ACK, 0); break; case KBD_CMD_SET_LEDS: case KBD_CMD_SET_RATE: s->kbd_write_cmd = val; kbd_queue(s, KBD_REPLY_ACK, 0); break; case KBD_CMD_RESET_DISABLE: kbd_reset_keyboard(s); s->scan_enabled = 0; kbd_queue(s, KBD_REPLY_ACK, 0); break; case KBD_CMD_RESET_ENABLE: kbd_reset_keyboard(s); s->scan_enabled = 1; kbd_queue(s, KBD_REPLY_ACK, 0); break; case KBD_CMD_RESET: kbd_reset_keyboard(s); kbd_queue(s, KBD_REPLY_ACK, 0); kbd_queue(s, KBD_REPLY_POR, 0); break; default: kbd_queue(s, KBD_REPLY_ACK, 0); break; } break; case KBD_CMD_SET_LEDS: kbd_queue(s, KBD_REPLY_ACK, 0); s->kbd_write_cmd = -1; break; case KBD_CMD_SET_RATE: kbd_queue(s, KBD_REPLY_ACK, 0); s->kbd_write_cmd = -1; break; } } static void kbd_mouse_send_packet(KBDState *s) { unsigned int b; int dx1, dy1, dz1; dx1 = s->mouse_dx; dy1 = s->mouse_dy; dz1 = s->mouse_dz; /* XXX: increase range to 8 bits ? */ if (dx1 > 127) dx1 = 127; else if (dx1 < -127) dx1 = -127; if (dy1 > 127) dy1 = 127; else if (dy1 < -127) dy1 = -127; b = 0x08 | ((dx1 < 0) << 4) | ((dy1 < 0) << 5) | (s->mouse_buttons & 0x07); kbd_queue(s, b, 1); kbd_queue(s, dx1 & 0xff, 1); kbd_queue(s, dy1 & 0xff, 1); /* extra byte for IMPS/2 or IMEX */ switch(s->mouse_type) { default: break; case 3: if (dz1 > 127) dz1 = 127; else if (dz1 < -127) dz1 = -127; kbd_queue(s, dz1 & 0xff, 1); break; case 4: if (dz1 > 7) dz1 = 7; else if (dz1 < -7) dz1 = -7; b = (dz1 & 0x0f) | ((s->mouse_buttons & 0x18) << 1); kbd_queue(s, b, 1); break; } /* update deltas */ s->mouse_dx -= dx1; s->mouse_dy -= dy1; s->mouse_dz -= dz1; } void kbd_mouse_event(int dx, int dy, int dz, int buttons_state) { KBDState *s = &kbd_state; /* check if deltas are recorded when disabled */ if (!(s->mouse_status & MOUSE_STATUS_ENABLED)) return; s->mouse_dx += dx; s->mouse_dy -= dy; s->mouse_dz += dz; s->mouse_buttons = buttons_state; if (!(s->mouse_status & MOUSE_STATUS_REMOTE) && (s->queues[1].count < (KBD_QUEUE_SIZE - 16))) { for(;;) { /* if not remote, send event. Multiple events are sent if too big deltas */ kbd_mouse_send_packet(s); if (s->mouse_dx == 0 && s->mouse_dy == 0 && s->mouse_dz == 0) break; } } } static void kbd_write_mouse(KBDState *s, int val) { #ifdef DEBUG_MOUSE printf("kbd: write mouse 0x%02x\n", val); #endif switch(s->mouse_write_cmd) { default: case -1: /* mouse command */ if (s->mouse_wrap) { if (val == AUX_RESET_WRAP) { s->mouse_wrap = 0; kbd_queue(s, AUX_ACK, 1); return; } else if (val != AUX_RESET) { kbd_queue(s, val, 1); return; } } switch(val) { case AUX_SET_SCALE11: s->mouse_status &= ~MOUSE_STATUS_SCALE21; kbd_queue(s, AUX_ACK, 1); break; case AUX_SET_SCALE21: s->mouse_status |= MOUSE_STATUS_SCALE21; kbd_queue(s, AUX_ACK, 1); break; case AUX_SET_STREAM: s->mouse_status &= ~MOUSE_STATUS_REMOTE; kbd_queue(s, AUX_ACK, 1); break; case AUX_SET_WRAP: s->mouse_wrap = 1; kbd_queue(s, AUX_ACK, 1); break; case AUX_SET_REMOTE: s->mouse_status |= MOUSE_STATUS_REMOTE; kbd_queue(s, AUX_ACK, 1); break; case AUX_GET_TYPE: kbd_queue(s, AUX_ACK, 1); kbd_queue(s, s->mouse_type, 1); break; case AUX_SET_RES: case AUX_SET_SAMPLE: s->mouse_write_cmd = val; kbd_queue(s, AUX_ACK, 1); break; case AUX_GET_SCALE: kbd_queue(s, AUX_ACK, 1); kbd_queue(s, s->mouse_status, 1); kbd_queue(s, s->mouse_resolution, 1); kbd_queue(s, s->mouse_sample_rate, 1); break; case AUX_POLL: kbd_queue(s, AUX_ACK, 1); kbd_mouse_send_packet(s); break; case AUX_ENABLE_DEV: s->mouse_status |= MOUSE_STATUS_ENABLED; kbd_queue(s, AUX_ACK, 1); break; case AUX_DISABLE_DEV: s->mouse_status &= ~MOUSE_STATUS_ENABLED; kbd_queue(s, AUX_ACK, 1); break; case AUX_SET_DEFAULT: s->mouse_sample_rate = 100; s->mouse_resolution = 2; s->mouse_status = 0; kbd_queue(s, AUX_ACK, 1); break; case AUX_RESET: s->mouse_sample_rate = 100; s->mouse_resolution = 2; s->mouse_status = 0; kbd_queue(s, AUX_ACK, 1); kbd_queue(s, 0xaa, 1); kbd_queue(s, s->mouse_type, 1); break; default: break; } break; case AUX_SET_SAMPLE: s->mouse_sample_rate = val; #if 0 /* detect IMPS/2 or IMEX */ switch(s->mouse_detect_state) { default: case 0: if (val == 200) s->mouse_detect_state = 1; break; case 1: if (val == 100) s->mouse_detect_state = 2; else if (val == 200) s->mouse_detect_state = 3; else s->mouse_detect_state = 0; break; case 2: if (val == 80) s->mouse_type = 3; /* IMPS/2 */ s->mouse_detect_state = 0; break; case 3: if (val == 80) s->mouse_type = 4; /* IMEX */ s->mouse_detect_state = 0; break; } #endif kbd_queue(s, AUX_ACK, 1); s->mouse_write_cmd = -1; break; case AUX_SET_RES: s->mouse_resolution = val; kbd_queue(s, AUX_ACK, 1); s->mouse_write_cmd = -1; break; } } void kbd_write_data(CPUX86State *env, uint32_t addr, uint32_t val) { KBDState *s = &kbd_state; #ifdef DEBUG_KBD printf("kbd: write data=0x%02x\n", val); #endif switch(s->write_cmd) { case 0: kbd_write_keyboard(s, val); break; case KBD_CCMD_WRITE_MODE: s->mode = val; kbd_update_irq(s); break; case KBD_CCMD_WRITE_OBUF: kbd_queue(s, val, 0); break; case KBD_CCMD_WRITE_AUX_OBUF: kbd_queue(s, val, 1); break; case KBD_CCMD_WRITE_OUTPORT: cpu_x86_set_a20(env, (val >> 1) & 1); if (!(val & 1)) { reset_requested = 1; cpu_x86_interrupt(global_env, CPU_INTERRUPT_EXIT); } break; case KBD_CCMD_WRITE_MOUSE: kbd_write_mouse(s, val); break; default: break; } s->write_cmd = 0; } void kbd_reset(KBDState *s) { KBDQueue *q; int i; s->kbd_write_cmd = -1; s->mouse_write_cmd = -1; s->mode = KBD_MODE_KBD_INT | KBD_MODE_MOUSE_INT; s->status = KBD_STAT_CMD | KBD_STAT_UNLOCKED; for(i = 0; i < 2; i++) { q = &s->queues[i]; q->rptr = 0; q->wptr = 0; q->count = 0; } } void kbd_init(void) { kbd_reset(&kbd_state); register_ioport_read(0x60, 1, kbd_read_data, 1); register_ioport_write(0x60, 1, kbd_write_data, 1); register_ioport_read(0x64, 1, kbd_read_status, 1); register_ioport_write(0x64, 1, kbd_write_command, 1); } /***********************************************************/ /* Bochs BIOS debug ports */ void bochs_bios_write(CPUX86State *env, uint32_t addr, uint32_t val) { switch(addr) { /* Bochs BIOS messages */ case 0x400: case 0x401: fprintf(stderr, "BIOS panic at rombios.c, line %d\n", val); exit(1); case 0x402: case 0x403: #ifdef DEBUG_BIOS fprintf(stderr, "%c", val); #endif break; /* LGPL'ed VGA BIOS messages */ case 0x501: case 0x502: fprintf(stderr, "VGA BIOS panic, line %d\n", val); exit(1); case 0x500: case 0x503: #ifdef DEBUG_BIOS fprintf(stderr, "%c", val); #endif break; } } void bochs_bios_init(void) { register_ioport_write(0x400, 1, bochs_bios_write, 2); register_ioport_write(0x401, 1, bochs_bios_write, 2); register_ioport_write(0x402, 1, bochs_bios_write, 1); register_ioport_write(0x403, 1, bochs_bios_write, 1); register_ioport_write(0x501, 1, bochs_bios_write, 2); register_ioport_write(0x502, 1, bochs_bios_write, 2); register_ioport_write(0x500, 1, bochs_bios_write, 1); register_ioport_write(0x503, 1, bochs_bios_write, 1); } /***********************************************************/ /* dumb display */ /* init terminal so that we can grab keys */ static struct termios oldtty; static void term_exit(void) { tcsetattr (0, TCSANOW, &oldtty); } static void term_init(void) { struct termios tty; tcgetattr (0, &tty); oldtty = tty; tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |INLCR|IGNCR|ICRNL|IXON); tty.c_oflag |= OPOST; tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); /* if graphical mode, we allow Ctrl-C handling */ if (nographic) tty.c_lflag &= ~ISIG; tty.c_cflag &= ~(CSIZE|PARENB); tty.c_cflag |= CS8; tty.c_cc[VMIN] = 1; tty.c_cc[VTIME] = 0; tcsetattr (0, TCSANOW, &tty); atexit(term_exit); fcntl(0, F_SETFL, O_NONBLOCK); } static void dumb_update(DisplayState *ds, int x, int y, int w, int h) { } static void dumb_resize(DisplayState *ds, int w, int h) { } static void dumb_refresh(DisplayState *ds) { vga_update_display(); } void dumb_display_init(DisplayState *ds) { ds->data = NULL; ds->linesize = 0; ds->depth = 0; ds->dpy_update = dumb_update; ds->dpy_resize = dumb_resize; ds->dpy_refresh = dumb_refresh; } #if !defined(CONFIG_SOFTMMU) /***********************************************************/ /* cpu signal handler */ static void host_segv_handler(int host_signum, siginfo_t *info, void *puc) { if (cpu_signal_handler(host_signum, info, puc)) return; term_exit(); abort(); } #endif static int timer_irq_pending; static int timer_irq_count; static int timer_ms; static int gui_refresh_pending, gui_refresh_count; static void host_alarm_handler(int host_signum, siginfo_t *info, void *puc) { /* NOTE: since usually the OS asks a 100 Hz clock, there can be some drift between cpu_get_ticks() and the interrupt time. So we queue some interrupts to avoid missing some */ timer_irq_count += pit_get_out_edges(&pit_channels[0]); if (timer_irq_count) { if (timer_irq_count > 2) timer_irq_count = 2; timer_irq_count--; timer_irq_pending = 1; } gui_refresh_count += timer_ms; if (gui_refresh_count >= GUI_REFRESH_INTERVAL) { gui_refresh_count = 0; gui_refresh_pending = 1; } if (gui_refresh_pending || timer_irq_pending) { /* just exit from the cpu to have a chance to handle timers */ cpu_x86_interrupt(global_env, CPU_INTERRUPT_EXIT); } } #ifdef CONFIG_SOFTMMU void *get_mmap_addr(unsigned long size) { return NULL; } #else unsigned long mmap_addr = PHYS_RAM_BASE; void *get_mmap_addr(unsigned long size) { unsigned long addr; addr = mmap_addr; mmap_addr += ((size + 4095) & ~4095) + 4096; return (void *)addr; } #endif /* main execution loop */ CPUState *cpu_gdbstub_get_env(void *opaque) { return global_env; } int main_loop(void *opaque) { struct pollfd ufds[3], *pf, *serial_ufd, *net_ufd, *gdb_ufd; int ret, n, timeout, serial_ok; uint8_t ch; CPUState *env = global_env; if (!term_inited) { /* initialize terminal only there so that the user has a chance to stop QEMU with Ctrl-C before the gdb connection is launched */ term_inited = 1; term_init(); } serial_ok = 1; cpu_enable_ticks(); for(;;) { ret = cpu_x86_exec(env); if (reset_requested) { ret = EXCP_INTERRUPT; break; } if (ret == EXCP_DEBUG) { ret = EXCP_DEBUG; break; } /* if hlt instruction, we wait until the next IRQ */ if (ret == EXCP_HLT) timeout = 10; else timeout = 0; /* poll any events */ serial_ufd = NULL; pf = ufds; if (serial_ok && !(serial_ports[0].lsr & UART_LSR_DR)) { serial_ufd = pf; pf->fd = 0; pf->events = POLLIN; pf++; } net_ufd = NULL; if (net_fd > 0 && ne2000_can_receive(&ne2000_state)) { net_ufd = pf; pf->fd = net_fd; pf->events = POLLIN; pf++; } gdb_ufd = NULL; if (gdbstub_fd > 0) { gdb_ufd = pf; pf->fd = gdbstub_fd; pf->events = POLLIN; pf++; } ret = poll(ufds, pf - ufds, timeout); if (ret > 0) { if (serial_ufd && (serial_ufd->revents & POLLIN)) { n = read(0, &ch, 1); if (n == 1) { serial_received_byte(&serial_ports[0], ch); } else { /* Closed, stop polling. */ serial_ok = 0; } } if (net_ufd && (net_ufd->revents & POLLIN)) { uint8_t buf[MAX_ETH_FRAME_SIZE]; n = read(net_fd, buf, MAX_ETH_FRAME_SIZE); if (n > 0) { if (n < 60) { memset(buf + n, 0, 60 - n); n = 60; } ne2000_receive(&ne2000_state, buf, n); } } if (gdb_ufd && (gdb_ufd->revents & POLLIN)) { uint8_t buf[1]; /* stop emulation if requested by gdb */ n = read(gdbstub_fd, buf, 1); if (n == 1) { ret = EXCP_INTERRUPT; break; } } } /* timer IRQ */ if (timer_irq_pending) { pic_set_irq(0, 1); pic_set_irq(0, 0); timer_irq_pending = 0; } /* VGA */ if (gui_refresh_pending) { display_state.dpy_refresh(&display_state); gui_refresh_pending = 0; } } cpu_disable_ticks(); return ret; } void help(void) { printf("QEMU PC emulator version " QEMU_VERSION ", Copyright (c) 2003 Fabrice Bellard\n" "usage: %s [options] [disk_image]\n" "\n" "'disk_image' is a raw hard image image for IDE hard disk 0\n" "\n" "Standard options:\n" "-hda/-hdb file use 'file' as IDE hard disk 0/1 image\n" "-hdc/-hdd file use 'file' as IDE hard disk 2/3 image\n" "-cdrom file use 'file' as IDE cdrom 2 image\n" "-boot [c|d] boot on hard disk or CD-ROM\n" "-snapshot write to temporary files instead of disk image files\n" "-m megs set virtual RAM size to megs MB\n" "-n script set network init script [default=%s]\n" "-tun-fd fd this fd talks to tap/tun, use it.\n" "-nographic disable graphical output\n" "\n" "Linux boot specific (does not require PC BIOS):\n" "-kernel bzImage use 'bzImage' as kernel image\n" "-append cmdline use 'cmdline' as kernel command line\n" "-initrd file use 'file' as initial ram disk\n" "\n" "Debug/Expert options:\n" "-s wait gdb connection to port %d\n" "-p port change gdb connection port\n" "-d output log in /tmp/vl.log\n" "-hdachs c,h,s force hard disk 0 geometry (usually qemu can guess it)\n" "-L path set the directory for the BIOS and VGA BIOS\n" "\n" "During emulation, use C-a h to get terminal commands:\n", #ifdef CONFIG_SOFTMMU "qemu", #else "qemu-fast", #endif DEFAULT_NETWORK_SCRIPT, DEFAULT_GDBSTUB_PORT); term_print_help(); #ifndef CONFIG_SOFTMMU printf("\n" "NOTE: this version of QEMU is faster but it needs slightly patched OSes to\n" "work. Please use the 'qemu' executable to have a more accurate (but slower)\n" "PC emulation.\n"); #endif exit(1); } struct option long_options[] = { { "initrd", 1, NULL, 0, }, { "hda", 1, NULL, 0, }, { "hdb", 1, NULL, 0, }, { "snapshot", 0, NULL, 0, }, { "hdachs", 1, NULL, 0, }, { "nographic", 0, NULL, 0, }, { "kernel", 1, NULL, 0, }, { "append", 1, NULL, 0, }, { "tun-fd", 1, NULL, 0, }, { "hdc", 1, NULL, 0, }, { "hdd", 1, NULL, 0, }, { "cdrom", 1, NULL, 0, }, { "boot", 1, NULL, 0, }, { NULL, 0, NULL, 0 }, }; #ifdef CONFIG_SDL /* SDL use the pthreads and they modify sigaction. We don't want that. */ #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3) extern void __libc_sigaction(); #define sigaction(sig, act, oact) __libc_sigaction(sig, act, oact) #else extern void __sigaction(); #define sigaction(sig, act, oact) __sigaction(sig, act, oact) #endif #endif /* CONFIG_SDL */ int main(int argc, char **argv) { int c, ret, initrd_size, i, use_gdbstub, gdbstub_port, long_index; int snapshot, linux_boot, total_ram_size; struct linux_params *params; struct sigaction act; struct itimerval itv; CPUX86State *env; const char *initrd_filename; const char *hd_filename[MAX_DISKS]; const char *kernel_filename, *kernel_cmdline; DisplayState *ds = &display_state; /* we never want that malloc() uses mmap() */ mallopt(M_MMAP_THRESHOLD, 4096 * 1024); initrd_filename = NULL; for(i = 0; i < MAX_DISKS; i++) hd_filename[i] = NULL; phys_ram_size = 32 * 1024 * 1024; vga_ram_size = VGA_RAM_SIZE; pstrcpy(network_script, sizeof(network_script), DEFAULT_NETWORK_SCRIPT); use_gdbstub = 0; gdbstub_port = DEFAULT_GDBSTUB_PORT; snapshot = 0; nographic = 0; kernel_filename = NULL; kernel_cmdline = ""; for(;;) { c = getopt_long_only(argc, argv, "hm:dn:sp:L:", long_options, &long_index); if (c == -1) break; switch(c) { case 0: switch(long_index) { case 0: initrd_filename = optarg; break; case 1: hd_filename[0] = optarg; break; case 2: hd_filename[1] = optarg; break; case 3: snapshot = 1; break; case 4: { int cyls, heads, secs; const char *p; p = optarg; cyls = strtol(p, (char **)&p, 0); if (*p != ',') goto chs_fail; p++; heads = strtol(p, (char **)&p, 0); if (*p != ',') goto chs_fail; p++; secs = strtol(p, (char **)&p, 0); if (*p != '\0') goto chs_fail; ide_set_geometry(0, cyls, heads, secs); chs_fail: ; } break; case 5: nographic = 1; break; case 6: kernel_filename = optarg; break; case 7: kernel_cmdline = optarg; break; case 8: net_fd = atoi(optarg); break; case 9: hd_filename[2] = optarg; break; case 10: hd_filename[3] = optarg; break; case 11: hd_filename[2] = optarg; ide_set_cdrom(2, 1); break; case 12: boot_device = optarg[0]; if (boot_device != 'c' && boot_device != 'd') { fprintf(stderr, "qemu: invalid boot device '%c'\n", boot_device); exit(1); } break; } break; case 'h': help(); break; case 'm': phys_ram_size = atoi(optarg) * 1024 * 1024; if (phys_ram_size <= 0) help(); if (phys_ram_size > PHYS_RAM_MAX_SIZE) { fprintf(stderr, "qemu: at most %d MB RAM can be simulated\n", PHYS_RAM_MAX_SIZE / (1024 * 1024)); exit(1); } break; case 'd': cpu_set_log(CPU_LOG_ALL); break; case 'n': pstrcpy(network_script, sizeof(network_script), optarg); break; case 's': use_gdbstub = 1; break; case 'p': gdbstub_port = atoi(optarg); break; case 'L': bios_dir = optarg; break; } } if (optind < argc) { hd_filename[0] = argv[optind++]; } linux_boot = (kernel_filename != NULL); if (!linux_boot && hd_filename[0] == '\0' && hd_filename[2] == '\0') help(); /* init debug */ setvbuf(stdout, NULL, _IOLBF, 0); /* init network tun interface */ if (net_fd < 0) net_init(); /* init the memory */ total_ram_size = phys_ram_size + vga_ram_size; #ifdef CONFIG_SOFTMMU phys_ram_base = malloc(total_ram_size); if (!phys_ram_base) { fprintf(stderr, "Could not allocate physical memory\n"); exit(1); } #else /* as we must map the same page at several addresses, we must use a fd */ { const char *tmpdir; tmpdir = getenv("QEMU_TMPDIR"); if (!tmpdir) tmpdir = "/tmp"; snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/vlXXXXXX", tmpdir); if (mkstemp(phys_ram_file) < 0) { fprintf(stderr, "Could not create temporary memory file '%s'\n", phys_ram_file); exit(1); } phys_ram_fd = open(phys_ram_file, O_CREAT | O_TRUNC | O_RDWR, 0600); if (phys_ram_fd < 0) { fprintf(stderr, "Could not open temporary memory file '%s'\n", phys_ram_file); exit(1); } ftruncate(phys_ram_fd, total_ram_size); unlink(phys_ram_file); phys_ram_base = mmap(get_mmap_addr(total_ram_size), total_ram_size, PROT_WRITE | PROT_READ, MAP_SHARED | MAP_FIXED, phys_ram_fd, 0); if (phys_ram_base == MAP_FAILED) { fprintf(stderr, "Could not map physical memory\n"); exit(1); } } #endif /* open the virtual block devices */ for(i = 0; i < MAX_DISKS; i++) { if (hd_filename[i]) { bs_table[i] = bdrv_open(hd_filename[i], snapshot); if (!bs_table[i]) { fprintf(stderr, "qemu: could not open hard disk image '%s\n", hd_filename[i]); exit(1); } } } /* init CPU state */ env = cpu_init(); global_env = env; cpu_single_env = env; init_ioports(); /* allocate RAM */ cpu_register_physical_memory(0, phys_ram_size, 0); if (linux_boot) { /* now we can load the kernel */ ret = load_kernel(kernel_filename, phys_ram_base + KERNEL_LOAD_ADDR); if (ret < 0) { fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename); exit(1); } /* load initrd */ initrd_size = 0; if (initrd_filename) { initrd_size = load_image(initrd_filename, phys_ram_base + INITRD_LOAD_ADDR); if (initrd_size < 0) { fprintf(stderr, "qemu: could not load initial ram disk '%s'\n", initrd_filename); exit(1); } } /* init kernel params */ params = (void *)(phys_ram_base + KERNEL_PARAMS_ADDR); memset(params, 0, sizeof(struct linux_params)); params->mount_root_rdonly = 0; stw_raw(¶ms->cl_magic, 0xA33F); stw_raw(¶ms->cl_offset, params->commandline - (uint8_t *)params); stl_raw(¶ms->alt_mem_k, (phys_ram_size / 1024) - 1024); pstrcat(params->commandline, sizeof(params->commandline), kernel_cmdline); params->loader_type = 0x01; if (initrd_size > 0) { stl_raw(¶ms->initrd_start, INITRD_LOAD_ADDR); stl_raw(¶ms->initrd_size, initrd_size); } params->orig_video_lines = 25; params->orig_video_cols = 80; /* setup basic memory access */ env->cr[0] = 0x00000033; cpu_x86_init_mmu(env); memset(params->idt_table, 0, sizeof(params->idt_table)); stq_raw(¶ms->gdt_table[2], 0x00cf9a000000ffffLL); /* KERNEL_CS */ stq_raw(¶ms->gdt_table[3], 0x00cf92000000ffffLL); /* KERNEL_DS */ /* for newer kernels (2.6.0) CS/DS are at different addresses */ stq_raw(¶ms->gdt_table[12], 0x00cf9a000000ffffLL); /* KERNEL_CS */ stq_raw(¶ms->gdt_table[13], 0x00cf92000000ffffLL); /* KERNEL_DS */ env->idt.base = (void *)((uint8_t *)params->idt_table - phys_ram_base); env->idt.limit = sizeof(params->idt_table) - 1; env->gdt.base = (void *)((uint8_t *)params->gdt_table - phys_ram_base); env->gdt.limit = sizeof(params->gdt_table) - 1; cpu_x86_load_seg_cache(env, R_CS, KERNEL_CS, NULL, 0xffffffff, 0x00cf9a00); cpu_x86_load_seg_cache(env, R_DS, KERNEL_DS, NULL, 0xffffffff, 0x00cf9200); cpu_x86_load_seg_cache(env, R_ES, KERNEL_DS, NULL, 0xffffffff, 0x00cf9200); cpu_x86_load_seg_cache(env, R_SS, KERNEL_DS, NULL, 0xffffffff, 0x00cf9200); cpu_x86_load_seg_cache(env, R_FS, KERNEL_DS, NULL, 0xffffffff, 0x00cf9200); cpu_x86_load_seg_cache(env, R_GS, KERNEL_DS, NULL, 0xffffffff, 0x00cf9200); env->eip = KERNEL_LOAD_ADDR; env->regs[R_ESI] = KERNEL_PARAMS_ADDR; env->eflags = 0x2; } else { char buf[1024]; /* RAW PC boot */ /* BIOS load */ snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME); ret = load_image(buf, phys_ram_base + 0x000f0000); if (ret != 0x10000) { fprintf(stderr, "qemu: could not load PC bios '%s'\n", buf); exit(1); } /* VGA BIOS load */ snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_FILENAME); ret = load_image(buf, phys_ram_base + 0x000c0000); /* setup basic memory access */ env->cr[0] = 0x60000010; cpu_x86_init_mmu(env); env->idt.limit = 0xffff; env->gdt.limit = 0xffff; env->ldt.limit = 0xffff; /* not correct (CS base=0xffff0000) */ cpu_x86_load_seg_cache(env, R_CS, 0xf000, (uint8_t *)0x000f0000, 0xffff, 0); cpu_x86_load_seg_cache(env, R_DS, 0, NULL, 0xffff, 0); cpu_x86_load_seg_cache(env, R_ES, 0, NULL, 0xffff, 0); cpu_x86_load_seg_cache(env, R_SS, 0, NULL, 0xffff, 0); cpu_x86_load_seg_cache(env, R_FS, 0, NULL, 0xffff, 0); cpu_x86_load_seg_cache(env, R_GS, 0, NULL, 0xffff, 0); env->eip = 0xfff0; env->regs[R_EDX] = 0x600; /* indicate P6 processor */ env->eflags = 0x2; bochs_bios_init(); } /* terminal init */ if (nographic) { dumb_display_init(ds); } else { #ifdef CONFIG_SDL sdl_display_init(ds); #else dumb_display_init(ds); #endif } /* init basic PC hardware */ register_ioport_write(0x80, 1, ioport80_write, 1); vga_init(ds, phys_ram_base + phys_ram_size, phys_ram_size, vga_ram_size); cmos_init(); pic_init(); pit_init(); serial_init(); ne2000_init(); ide_init(); kbd_init(); /* setup cpu signal handlers for MMU / self modifying code handling */ sigfillset(&act.sa_mask); act.sa_flags = SA_SIGINFO; #if !defined(CONFIG_SOFTMMU) act.sa_sigaction = host_segv_handler; sigaction(SIGSEGV, &act, NULL); sigaction(SIGBUS, &act, NULL); #endif act.sa_sigaction = host_alarm_handler; sigaction(SIGALRM, &act, NULL); itv.it_interval.tv_sec = 0; itv.it_interval.tv_usec = 1000; itv.it_value.tv_sec = 0; itv.it_value.tv_usec = 10 * 1000; setitimer(ITIMER_REAL, &itv, NULL); /* we probe the tick duration of the kernel to inform the user if the emulated kernel requested a too high timer frequency */ getitimer(ITIMER_REAL, &itv); timer_ms = itv.it_interval.tv_usec / 1000; pit_min_timer_count = ((uint64_t)itv.it_interval.tv_usec * PIT_FREQ) / 1000000; if (use_gdbstub) { cpu_gdbstub(NULL, main_loop, gdbstub_port); } else { main_loop(NULL); } return 0; }