/* * QEMU PC System Emulator * * Copyright (c) 2003-2004 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 "hw.h"#include "pc.h"#include "fdc.h"#include "pci.h"#include "block.h"#include "sysemu.h"#include "audio/audio.h"#include "net.h"#include "smbus.h"#include "boards.h"/* output Bochs bios info messages *///#define DEBUG_BIOS#define BIOS_FILENAME "bios.bin"#define VGABIOS_FILENAME "vgabios.bin"#define VGABIOS_CIRRUS_FILENAME "vgabios-cirrus.bin"/* Leave a chunk of memory at the top of RAM for the BIOS ACPI tables.  */#define ACPI_DATA_SIZE       0x10000#define MAX_IDE_BUS 2static fdctrl_t *floppy_controller;static RTCState *rtc_state;static PITState *pit;static IOAPICState *ioapic;static PCIDevice *i440fx_state;static void ioport80_write(void *opaque, uint32_t addr, uint32_t data){}/* MSDOS compatibility mode FPU exception support */static qemu_irq ferr_irq;/* XXX: add IGNNE support */void cpu_set_ferr(CPUX86State *s){    qemu_irq_raise(ferr_irq);}static void ioportF0_write(void *opaque, uint32_t addr, uint32_t data){    qemu_irq_lower(ferr_irq);}/* TSC handling */uint64_t cpu_get_tsc(CPUX86State *env){    /* Note: when using kqemu, it is more logical to return the host TSC       because kqemu does not trap the RDTSC instruction for       performance reasons */#if USE_KQEMU    if (env->kqemu_enabled) {        return cpu_get_real_ticks();    } else#endif    {        return cpu_get_ticks();    }}/* SMM support */void cpu_smm_update(CPUState *env){    if (i440fx_state && env == first_cpu)        i440fx_set_smm(i440fx_state, (env->hflags >> HF_SMM_SHIFT) & 1);}/* IRQ handling */int cpu_get_pic_interrupt(CPUState *env){    int intno;    intno = apic_get_interrupt(env);    if (intno >= 0) {        /* set irq request if a PIC irq is still pending */        /* XXX: improve that */        pic_update_irq(isa_pic);        return intno;    }    /* read the irq from the PIC */    if (!apic_accept_pic_intr(env))        return -1;    intno = pic_read_irq(isa_pic);    return intno;}static void pic_irq_request(void *opaque, int irq, int level){    CPUState *env = opaque;    if (level && apic_accept_pic_intr(env))        cpu_interrupt(env, CPU_INTERRUPT_HARD);}/* PC cmos mappings */#define REG_EQUIPMENT_BYTE          0x14static int cmos_get_fd_drive_type(int fd0){    int val;    switch (fd0) {    case 0:        /* 1.44 Mb 3"5 drive */        val = 4;        break;    case 1:        /* 2.88 Mb 3"5 drive */        val = 5;        break;    case 2:        /* 1.2 Mb 5"5 drive */        val = 2;        break;    default:        val = 0;        break;    }    return val;}static void cmos_init_hd(int type_ofs, int info_ofs, BlockDriverState *hd){    RTCState *s = rtc_state;    int cylinders, heads, sectors;    bdrv_get_geometry_hint(hd, &cylinders, &heads, &sectors);    rtc_set_memory(s, type_ofs, 47);    rtc_set_memory(s, info_ofs, cylinders);    rtc_set_memory(s, info_ofs + 1, cylinders >> 8);    rtc_set_memory(s, info_ofs + 2, heads);    rtc_set_memory(s, info_ofs + 3, 0xff);    rtc_set_memory(s, info_ofs + 4, 0xff);    rtc_set_memory(s, info_ofs + 5, 0xc0 | ((heads > 8) << 3));    rtc_set_memory(s, info_ofs + 6, cylinders);    rtc_set_memory(s, info_ofs + 7, cylinders >> 8);    rtc_set_memory(s, info_ofs + 8, sectors);}/* convert boot_device letter to something recognizable by the bios */static int boot_device2nibble(char boot_device){    switch(boot_device) {    case 'a':    case 'b':        return 0x01; /* floppy boot */    case 'c':        return 0x02; /* hard drive boot */    case 'd':        return 0x03; /* CD-ROM boot */    case 'n':        return 0x04; /* Network boot */    }    return 0;}/* hd_table must contain 4 block drivers */static void cmos_init(int ram_size, const char *boot_device, BlockDriverState **hd_table){    RTCState *s = rtc_state;    int nbds, bds[3] = { 0, };    int val;    int fd0, fd1, nb;    int i;    /* various important CMOS locations needed by PC/Bochs bios */    /* memory size */    val = 640; /* base memory in K */    rtc_set_memory(s, 0x15, val);    rtc_set_memory(s, 0x16, val >> 8);    val = (ram_size / 1024) - 1024;    if (val > 65535)        val = 65535;    rtc_set_memory(s, 0x17, val);    rtc_set_memory(s, 0x18, val >> 8);    rtc_set_memory(s, 0x30, val);    rtc_set_memory(s, 0x31, val >> 8);    if (ram_size > (16 * 1024 * 1024))        val = (ram_size / 65536) - ((16 * 1024 * 1024) / 65536);    else        val = 0;    if (val > 65535)        val = 65535;    rtc_set_memory(s, 0x34, val);    rtc_set_memory(s, 0x35, val >> 8);    /* set boot devices, and disable floppy signature check if requested */#define PC_MAX_BOOT_DEVICES 3    nbds = strlen(boot_device);    if (nbds > PC_MAX_BOOT_DEVICES) {        fprintf(stderr, "Too many boot devices for PC\n");        exit(1);    }    for (i = 0; i < nbds; i++) {        bds[i] = boot_device2nibble(boot_device[i]);        if (bds[i] == 0) {            fprintf(stderr, "Invalid boot device for PC: '%c'\n",                    boot_device[i]);            exit(1);        }    }    rtc_set_memory(s, 0x3d, (bds[1] << 4) | bds[0]);    rtc_set_memory(s, 0x38, (bds[2] << 4) | (fd_bootchk ?  0x0 : 0x1));    /* floppy type */    fd0 = fdctrl_get_drive_type(floppy_controller, 0);    fd1 = fdctrl_get_drive_type(floppy_controller, 1);    val = (cmos_get_fd_drive_type(fd0) << 4) | cmos_get_fd_drive_type(fd1);    rtc_set_memory(s, 0x10, val);    val = 0;    nb = 0;    if (fd0 < 3)        nb++;    if (fd1 < 3)        nb++;    switch (nb) {    case 0:        break;    case 1:        val |= 0x01; /* 1 drive, ready for boot */        break;    case 2:        val |= 0x41; /* 2 drives, ready for boot */        break;    }    val |= 0x02; /* FPU is there */    val |= 0x04; /* PS/2 mouse installed */    rtc_set_memory(s, REG_EQUIPMENT_BYTE, val);    /* hard drives */    rtc_set_memory(s, 0x12, (hd_table[0] ? 0xf0 : 0) | (hd_table[1] ? 0x0f : 0));    if (hd_table[0])        cmos_init_hd(0x19, 0x1b, hd_table[0]);    if (hd_table[1])        cmos_init_hd(0x1a, 0x24, hd_table[1]);    val = 0;    for (i = 0; i < 4; i++) {        if (hd_table[i]) {            int cylinders, heads, sectors, translation;            /* NOTE: bdrv_get_geometry_hint() returns the physical                geometry.  It is always such that: 1 <= sects <= 63, 1                <= heads <= 16, 1 <= cylinders <= 16383. The BIOS                geometry can be different if a translation is done. */            translation = bdrv_get_translation_hint(hd_table[i]);            if (translation == BIOS_ATA_TRANSLATION_AUTO) {                bdrv_get_geometry_hint(hd_table[i], &cylinders, &heads, &sectors);                if (cylinders <= 1024 && heads <= 16 && sectors <= 63) {                    /* No translation. */                    translation = 0;                } else {                    /* LBA translation. */                    translation = 1;                }            } else {                translation--;            }            val |= translation << (i * 2);        }    }    rtc_set_memory(s, 0x39, val);}void ioport_set_a20(int enable){    /* XXX: send to all CPUs ? */    cpu_x86_set_a20(first_cpu, enable);}int ioport_get_a20(void){    return ((first_cpu->a20_mask >> 20) & 1);}static void ioport92_write(void *opaque, uint32_t addr, uint32_t val){    ioport_set_a20((val >> 1) & 1);    /* XXX: bit 0 is fast reset */}static uint32_t ioport92_read(void *opaque, uint32_t addr){    return ioport_get_a20() << 1;}/***********************************************************//* Bochs BIOS debug ports */static void bochs_bios_write(void *opaque, uint32_t addr, uint32_t val){    static const char shutdown_str[8] = "Shutdown";    static int shutdown_index = 0;    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;    case 0x8900:        /* same as Bochs power off */        if (val == shutdown_str[shutdown_index]) {            shutdown_index++;            if (shutdown_index == 8) {                shutdown_index = 0;                qemu_system_shutdown_request();            }        } else {            shutdown_index = 0;        }        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;    }}static void bochs_bios_init(void){    register_ioport_write(0x400, 1, 2, bochs_bios_write, NULL);    register_ioport_write(0x401, 1, 2, bochs_bios_write, NULL);    register_ioport_write(0x402, 1, 1, bochs_bios_write, NULL);    register_ioport_write(0x403, 1, 1, bochs_bios_write, NULL);    register_ioport_write(0x8900, 1, 1, bochs_bios_write, NULL);    register_ioport_write(0x501, 1, 2, bochs_bios_write, NULL);    register_ioport_write(0x502, 1, 2, bochs_bios_write, NULL);    register_ioport_write(0x500, 1, 1, bochs_bios_write, NULL);    register_ioport_write(0x503, 1, 1, bochs_bios_write, NULL);}/* Generate an initial boot sector which sets state and jump to   a specified vector */static void generate_bootsect(uint32_t gpr[8], uint16_t segs[6], uint16_t ip){    uint8_t bootsect[512], *p;    int i;    int hda;    hda = drive_get_index(IF_IDE, 0, 0);    if (hda == -1) {	fprintf(stderr, "A disk image must be given for 'hda' when booting "		"a Linux kernel\n");	exit(1);    }    memset(bootsect, 0, sizeof(bootsect));    /* Copy the MSDOS partition table if possible */    bdrv_read(drives_table[hda].bdrv, 0, bootsect, 1);    /* Make sure we have a partition signature */    bootsect[510] = 0x55;    bootsect[511] = 0xaa;    /* Actual code */    p = bootsect;    *p++ = 0xfa;		/* CLI */    *p++ = 0xfc;		/* CLD */    for (i = 0; i < 6; i++) {	if (i == 1)		/* Skip CS */	    continue;	*p++ = 0xb8;		/* MOV AX,imm16 */	*p++ = segs[i];	*p++ = segs[i] >> 8;	*p++ = 0x8e;		/* MOV <seg>,AX */	*p++ = 0xc0 + (i << 3);    }    for (i = 0; i < 8; i++) {	*p++ = 0x66;		/* 32-bit operand size */	*p++ = 0xb8 + i;	/* MOV <reg>,imm32 */	*p++ = gpr[i];	*p++ = gpr[i] >> 8;	*p++ = gpr[i] >> 16;	*p++ = gpr[i] >> 24;    }    *p++ = 0xea;		/* JMP FAR */    *p++ = ip;			/* IP */    *p++ = ip >> 8;    *p++ = segs[1];		/* CS */    *p++ = segs[1] >> 8;    bdrv_set_boot_sector(drives_table[hda].bdrv, bootsect, sizeof(bootsect));}static int load_kernel(const char *filename, uint8_t *addr,                       uint8_t *real_addr){    int fd, size;    int setup_sects;    fd = open(filename, O_RDONLY | O_BINARY);    if (fd < 0)        return -1;    /* load 16 bit code */    if (read(fd, real_addr, 512) != 512)        goto fail;    setup_sects = real_addr[0x1F1];    if (!setup_sects)        setup_sects = 4;    if (read(fd, real_addr + 512, setup_sects * 512) !=        setup_sects * 512)        goto fail;    /* load 32 bit code */    size = read(fd, addr, 16 * 1024 * 1024);    if (size < 0)        goto fail;    close(fd);    return size; fail:    close(fd);    return -1;}static long get_file_size(FILE *f){    long where, size;    /* XXX: on Unix systems, using fstat() probably makes more sense */    where = ftell(f);    fseek(f, 0, SEEK_END);    size = ftell(f);    fseek(f, where, SEEK_SET);    return size;}static void load_linux(const char *kernel_filename,		       const char *initrd_filename,		       const char *kernel_cmdline){    uint16_t protocol;    uint32_t gpr[8];    uint16_t seg[6];    uint16_t real_seg;    int setup_size, kernel_size, initrd_size, cmdline_size;    uint32_t initrd_max;    uint8_t header[1024];    uint8_t *real_addr, *prot_addr, *cmdline_addr, *initrd_addr;    FILE *f, *fi;    /* Align to 16 bytes as a paranoia measure */    cmdline_size = (strlen(kernel_cmdline)+16) & ~15;    /* load the kernel header */    f = fopen(kernel_filename, "rb");    if (!f || !(kernel_size = get_file_size(f)) ||	fread(header, 1, 1024, f) != 1024) {	fprintf(stderr, "qemu: could not load kernel '%s'\n",		kernel_filename);	exit(1);    }    /* kernel protocol version */#if 0    fprintf(stderr, "header magic: %#x\n", ldl_p(header+0x202));#endif    if (ldl_p(header+0x202) == 0x53726448)	protocol = lduw_p(header+0x206);    else	protocol = 0;    if (protocol < 0x200 || !(header[0x211] & 0x01)) {	/* Low kernel */	real_addr    = phys_ram_base + 0x90000;	cmdline_addr = phys_ram_base + 0x9a000 - cmdline_size;	prot_addr    = phys_ram_base + 0x10000;    } else if (protocol < 0x202) {	/* High but ancient kernel */