pc.c 33.3 KB
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/*
 * QEMU PC System Emulator
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 *
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 * Copyright (c) 2003-2004 Fabrice Bellard
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 *
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 * 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.
 */
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#include "hw.h"
#include "pc.h"
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#include "apic.h"
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#include "fdc.h"
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#include "ide.h"
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#include "pci.h"
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#include "vmware_vga.h"
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#include "monitor.h"
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#include "fw_cfg.h"
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#include "hpet_emul.h"
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#include "smbios.h"
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#include "loader.h"
#include "elf.h"
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#include "multiboot.h"
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#include "mc146818rtc.h"
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#include "msi.h"
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#include "sysbus.h"
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#include "sysemu.h"
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#include "blockdev.h"
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#include "ui/qemu-spice.h"
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#include "memory.h"
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#include "exec-memory.h"
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/* output Bochs bios info messages */
//#define DEBUG_BIOS

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/* debug PC/ISA interrupts */
//#define DEBUG_IRQ

#ifdef DEBUG_IRQ
#define DPRINTF(fmt, ...)                                       \
    do { printf("CPUIRQ: " fmt , ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...)
#endif

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#define BIOS_FILENAME "bios.bin"

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#define PC_MAX_BIOS_SIZE (4 * 1024 * 1024)

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/* Leave a chunk of memory at the top of RAM for the BIOS ACPI tables.  */
#define ACPI_DATA_SIZE       0x10000
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#define BIOS_CFG_IOPORT 0x510
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#define FW_CFG_ACPI_TABLES (FW_CFG_ARCH_LOCAL + 0)
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#define FW_CFG_SMBIOS_ENTRIES (FW_CFG_ARCH_LOCAL + 1)
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#define FW_CFG_IRQ0_OVERRIDE (FW_CFG_ARCH_LOCAL + 2)
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#define FW_CFG_E820_TABLE (FW_CFG_ARCH_LOCAL + 3)
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#define FW_CFG_HPET (FW_CFG_ARCH_LOCAL + 4)
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#define MSI_ADDR_BASE 0xfee00000

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#define E820_NR_ENTRIES		16

struct e820_entry {
    uint64_t address;
    uint64_t length;
    uint32_t type;
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} QEMU_PACKED __attribute((__aligned__(4)));
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struct e820_table {
    uint32_t count;
    struct e820_entry entry[E820_NR_ENTRIES];
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} QEMU_PACKED __attribute((__aligned__(4)));
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static struct e820_table e820_table;
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struct hpet_fw_config hpet_cfg = {.count = UINT8_MAX};
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void gsi_handler(void *opaque, int n, int level)
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{
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    GSIState *s = opaque;
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    DPRINTF("pc: %s GSI %d\n", level ? "raising" : "lowering", n);
    if (n < ISA_NUM_IRQS) {
        qemu_set_irq(s->i8259_irq[n], level);
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    }
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    qemu_set_irq(s->ioapic_irq[n], level);
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}
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static void ioport80_write(void *opaque, uint32_t addr, uint32_t data)
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{
}

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/* MSDOS compatibility mode FPU exception support */
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static qemu_irq ferr_irq;
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void pc_register_ferr_irq(qemu_irq irq)
{
    ferr_irq = irq;
}

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/* XXX: add IGNNE support */
void cpu_set_ferr(CPUX86State *s)
{
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    qemu_irq_raise(ferr_irq);
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}

static void ioportF0_write(void *opaque, uint32_t addr, uint32_t data)
{
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    qemu_irq_lower(ferr_irq);
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}

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/* TSC handling */
uint64_t cpu_get_tsc(CPUX86State *env)
{
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    return cpu_get_ticks();
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}

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/* SMM support */
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static cpu_set_smm_t smm_set;
static void *smm_arg;

void cpu_smm_register(cpu_set_smm_t callback, void *arg)
{
    assert(smm_set == NULL);
    assert(smm_arg == NULL);
    smm_set = callback;
    smm_arg = arg;
}

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void cpu_smm_update(CPUState *env)
{
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    if (smm_set && smm_arg && env == first_cpu)
        smm_set(!!(env->hflags & HF_SMM_MASK), smm_arg);
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}


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/* IRQ handling */
int cpu_get_pic_interrupt(CPUState *env)
{
    int intno;

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    intno = apic_get_interrupt(env->apic_state);
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    if (intno >= 0) {
        return intno;
    }
    /* read the irq from the PIC */
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    if (!apic_accept_pic_intr(env->apic_state)) {
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        return -1;
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    }
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    intno = pic_read_irq(isa_pic);
    return intno;
}

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static void pic_irq_request(void *opaque, int irq, int level)
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{
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    CPUState *env = first_cpu;

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    DPRINTF("pic_irqs: %s irq %d\n", level? "raise" : "lower", irq);
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    if (env->apic_state) {
        while (env) {
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            if (apic_accept_pic_intr(env->apic_state)) {
                apic_deliver_pic_intr(env->apic_state, level);
            }
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            env = env->next_cpu;
        }
    } else {
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        if (level)
            cpu_interrupt(env, CPU_INTERRUPT_HARD);
        else
            cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
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    }
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}

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/* PC cmos mappings */

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#define REG_EQUIPMENT_BYTE          0x14

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static int cmos_get_fd_drive_type(FDriveType fd0)
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{
    int val;

    switch (fd0) {
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    case FDRIVE_DRV_144:
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        /* 1.44 Mb 3"5 drive */
        val = 4;
        break;
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    case FDRIVE_DRV_288:
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        /* 2.88 Mb 3"5 drive */
        val = 5;
        break;
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    case FDRIVE_DRV_120:
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        /* 1.2 Mb 5"5 drive */
        val = 2;
        break;
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    case FDRIVE_DRV_NONE:
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    default:
        val = 0;
        break;
    }
    return val;
}

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static void cmos_init_hd(int type_ofs, int info_ofs, BlockDriverState *hd,
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                         ISADevice *s)
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{
    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);
}

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/* 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;
}

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static int set_boot_dev(ISADevice *s, const char *boot_device, int fd_bootchk)
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{
#define PC_MAX_BOOT_DEVICES 3
    int nbds, bds[3] = { 0, };
    int i;

    nbds = strlen(boot_device);
    if (nbds > PC_MAX_BOOT_DEVICES) {
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        error_report("Too many boot devices for PC");
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        return(1);
    }
    for (i = 0; i < nbds; i++) {
        bds[i] = boot_device2nibble(boot_device[i]);
        if (bds[i] == 0) {
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            error_report("Invalid boot device for PC: '%c'",
                         boot_device[i]);
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            return(1);
        }
    }
    rtc_set_memory(s, 0x3d, (bds[1] << 4) | bds[0]);
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    rtc_set_memory(s, 0x38, (bds[2] << 4) | (fd_bootchk ? 0x0 : 0x1));
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    return(0);
}

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static int pc_boot_set(void *opaque, const char *boot_device)
{
    return set_boot_dev(opaque, boot_device, 0);
}

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typedef struct pc_cmos_init_late_arg {
    ISADevice *rtc_state;
    BusState *idebus0, *idebus1;
} pc_cmos_init_late_arg;

static void pc_cmos_init_late(void *opaque)
{
    pc_cmos_init_late_arg *arg = opaque;
    ISADevice *s = arg->rtc_state;
    int val;
    BlockDriverState *hd_table[4];
    int i;

    ide_get_bs(hd_table, arg->idebus0);
    ide_get_bs(hd_table + 2, arg->idebus1);

    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], s);
    if (hd_table[1])
        cmos_init_hd(0x1a, 0x24, hd_table[1], s);

    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);

    qemu_unregister_reset(pc_cmos_init_late, opaque);
}

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void pc_cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size,
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                  const char *boot_device,
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                  ISADevice *floppy, BusState *idebus0, BusState *idebus1,
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                  ISADevice *s)
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{
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    int val, nb, nb_heads, max_track, last_sect, i;
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    FDriveType fd_type[2] = { FDRIVE_DRV_NONE, FDRIVE_DRV_NONE };
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    BlockDriverState *fd[MAX_FD];
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    static pc_cmos_init_late_arg arg;
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    /* various important CMOS locations needed by PC/Bochs bios */
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    /* memory size */
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    val = 640; /* base memory in K */
    rtc_set_memory(s, 0x15, val);
    rtc_set_memory(s, 0x16, val >> 8);

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    val = (ram_size / 1024) - 1024;
    if (val > 65535)
        val = 65535;
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    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);
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    if (above_4g_mem_size) {
        rtc_set_memory(s, 0x5b, (unsigned int)above_4g_mem_size >> 16);
        rtc_set_memory(s, 0x5c, (unsigned int)above_4g_mem_size >> 24);
        rtc_set_memory(s, 0x5d, (uint64_t)above_4g_mem_size >> 32);
    }

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    if (ram_size > (16 * 1024 * 1024))
        val = (ram_size / 65536) - ((16 * 1024 * 1024) / 65536);
    else
        val = 0;
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    if (val > 65535)
        val = 65535;
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    rtc_set_memory(s, 0x34, val);
    rtc_set_memory(s, 0x35, val >> 8);
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    /* set the number of CPU */
    rtc_set_memory(s, 0x5f, smp_cpus - 1);

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    /* set boot devices, and disable floppy signature check if requested */
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    if (set_boot_dev(s, boot_device, fd_bootchk)) {
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        exit(1);
    }
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    /* floppy type */
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    if (floppy) {
        fdc_get_bs(fd, floppy);
        for (i = 0; i < 2; i++) {
            if (fd[i] && bdrv_is_inserted(fd[i])) {
                bdrv_get_floppy_geometry_hint(fd[i], &nb_heads, &max_track,
                                              &last_sect, FDRIVE_DRV_NONE,
                                              &fd_type[i]);
            }
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        }
    }
    val = (cmos_get_fd_drive_type(fd_type[0]) << 4) |
        cmos_get_fd_drive_type(fd_type[1]);
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    rtc_set_memory(s, 0x10, val);
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    val = 0;
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    nb = 0;
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    if (fd_type[0] < FDRIVE_DRV_NONE) {
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        nb++;
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    }
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    if (fd_type[1] < FDRIVE_DRV_NONE) {
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        nb++;
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    }
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    switch (nb) {
    case 0:
        break;
    case 1:
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        val |= 0x01; /* 1 drive, ready for boot */
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        break;
    case 2:
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        val |= 0x41; /* 2 drives, ready for boot */
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        break;
    }
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    val |= 0x02; /* FPU is there */
    val |= 0x04; /* PS/2 mouse installed */
    rtc_set_memory(s, REG_EQUIPMENT_BYTE, val);

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    /* hard drives */
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    arg.rtc_state = s;
    arg.idebus0 = idebus0;
    arg.idebus1 = idebus1;
    qemu_register_reset(pc_cmos_init_late, &arg);
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}

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/* port 92 stuff: could be split off */
typedef struct Port92State {
    ISADevice dev;
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    MemoryRegion io;
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    uint8_t outport;
    qemu_irq *a20_out;
} Port92State;

static void port92_write(void *opaque, uint32_t addr, uint32_t val)
{
    Port92State *s = opaque;

    DPRINTF("port92: write 0x%02x\n", val);
    s->outport = val;
    qemu_set_irq(*s->a20_out, (val >> 1) & 1);
    if (val & 1) {
        qemu_system_reset_request();
    }
}

static uint32_t port92_read(void *opaque, uint32_t addr)
{
    Port92State *s = opaque;
    uint32_t ret;

    ret = s->outport;
    DPRINTF("port92: read 0x%02x\n", ret);
    return ret;
}

static void port92_init(ISADevice *dev, qemu_irq *a20_out)
{
    Port92State *s = DO_UPCAST(Port92State, dev, dev);

    s->a20_out = a20_out;
}

static const VMStateDescription vmstate_port92_isa = {
    .name = "port92",
    .version_id = 1,
    .minimum_version_id = 1,
    .minimum_version_id_old = 1,
    .fields      = (VMStateField []) {
        VMSTATE_UINT8(outport, Port92State),
        VMSTATE_END_OF_LIST()
    }
};

static void port92_reset(DeviceState *d)
{
    Port92State *s = container_of(d, Port92State, dev.qdev);

    s->outport &= ~1;
}

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static const MemoryRegionPortio port92_portio[] = {
    { 0, 1, 1, .read = port92_read, .write = port92_write },
    PORTIO_END_OF_LIST(),
};

static const MemoryRegionOps port92_ops = {
    .old_portio = port92_portio
};

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static int port92_initfn(ISADevice *dev)
{
    Port92State *s = DO_UPCAST(Port92State, dev, dev);

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    memory_region_init_io(&s->io, &port92_ops, s, "port92", 1);
    isa_register_ioport(dev, &s->io, 0x92);

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    s->outport = 0;
    return 0;
}

static ISADeviceInfo port92_info = {
    .qdev.name     = "port92",
    .qdev.size     = sizeof(Port92State),
    .qdev.vmsd     = &vmstate_port92_isa,
    .qdev.no_user  = 1,
    .qdev.reset    = port92_reset,
    .init          = port92_initfn,
};

static void port92_register(void)
{
    isa_qdev_register(&port92_info);
}
device_init(port92_register)

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static void handle_a20_line_change(void *opaque, int irq, int level)
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{
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    CPUState *cpu = opaque;
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    /* XXX: send to all CPUs ? */
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    /* XXX: add logic to handle multiple A20 line sources */
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    cpu_x86_set_a20(cpu, level);
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}

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/***********************************************************/
/* Bochs BIOS debug ports */

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static void bochs_bios_write(void *opaque, uint32_t addr, uint32_t val)
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{
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    static const char shutdown_str[8] = "Shutdown";
    static int shutdown_index = 0;
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    switch(addr) {
        /* Bochs BIOS messages */
    case 0x400:
    case 0x401:
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        /* used to be panic, now unused */
        break;
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    case 0x402:
    case 0x403:
#ifdef DEBUG_BIOS
        fprintf(stderr, "%c", val);
#endif
        break;
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    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;
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        /* LGPL'ed VGA BIOS messages */
    case 0x501:
    case 0x502:
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        exit((val << 1) | 1);
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    case 0x500:
    case 0x503:
#ifdef DEBUG_BIOS
        fprintf(stderr, "%c", val);
#endif
        break;
    }
}

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int e820_add_entry(uint64_t address, uint64_t length, uint32_t type)
{
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    int index = le32_to_cpu(e820_table.count);
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572 573 574 575
    struct e820_entry *entry;

    if (index >= E820_NR_ENTRIES)
        return -EBUSY;
576
    entry = &e820_table.entry[index++];
J
Jes Sorensen 已提交
577

578 579 580
    entry->address = cpu_to_le64(address);
    entry->length = cpu_to_le64(length);
    entry->type = cpu_to_le32(type);
J
Jes Sorensen 已提交
581

582 583
    e820_table.count = cpu_to_le32(index);
    return index;
J
Jes Sorensen 已提交
584 585
}

A
Alexander Graf 已提交
586
static void *bochs_bios_init(void)
B
bellard 已提交
587
{
588
    void *fw_cfg;
589 590
    uint8_t *smbios_table;
    size_t smbios_len;
591 592
    uint64_t *numa_fw_cfg;
    int i, j;
593

B
bellard 已提交
594 595 596 597
    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);
B
bellard 已提交
598
    register_ioport_write(0x8900, 1, 1, bochs_bios_write, NULL);
B
bellard 已提交
599

600
    register_ioport_write(0x501, 1, 1, bochs_bios_write, NULL);
B
bellard 已提交
601 602 603 604
    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);
605 606

    fw_cfg = fw_cfg_init(BIOS_CFG_IOPORT, BIOS_CFG_IOPORT + 1, 0, 0);
A
Alexander Graf 已提交
607

608
    fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);
609
    fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
610 611
    fw_cfg_add_bytes(fw_cfg, FW_CFG_ACPI_TABLES, (uint8_t *)acpi_tables,
                     acpi_tables_len);
J
Jes Sorensen 已提交
612
    fw_cfg_add_bytes(fw_cfg, FW_CFG_IRQ0_OVERRIDE, &irq0override, 1);
613 614 615 616 617

    smbios_table = smbios_get_table(&smbios_len);
    if (smbios_table)
        fw_cfg_add_bytes(fw_cfg, FW_CFG_SMBIOS_ENTRIES,
                         smbios_table, smbios_len);
J
Jes Sorensen 已提交
618 619
    fw_cfg_add_bytes(fw_cfg, FW_CFG_E820_TABLE, (uint8_t *)&e820_table,
                     sizeof(struct e820_table));
620

621 622
    fw_cfg_add_bytes(fw_cfg, FW_CFG_HPET, (uint8_t *)&hpet_cfg,
                     sizeof(struct hpet_fw_config));
623 624 625 626
    /* allocate memory for the NUMA channel: one (64bit) word for the number
     * of nodes, one word for each VCPU->node and one word for each node to
     * hold the amount of memory.
     */
627
    numa_fw_cfg = g_malloc0((1 + max_cpus + nb_numa_nodes) * 8);
628
    numa_fw_cfg[0] = cpu_to_le64(nb_numa_nodes);
629
    for (i = 0; i < max_cpus; i++) {
630 631 632 633 634 635 636 637
        for (j = 0; j < nb_numa_nodes; j++) {
            if (node_cpumask[j] & (1 << i)) {
                numa_fw_cfg[i + 1] = cpu_to_le64(j);
                break;
            }
        }
    }
    for (i = 0; i < nb_numa_nodes; i++) {
638
        numa_fw_cfg[max_cpus + 1 + i] = cpu_to_le64(node_mem[i]);
639 640
    }
    fw_cfg_add_bytes(fw_cfg, FW_CFG_NUMA, (uint8_t *)numa_fw_cfg,
641
                     (1 + max_cpus + nb_numa_nodes) * 8);
A
Alexander Graf 已提交
642 643

    return fw_cfg;
B
bellard 已提交
644 645
}

T
ths 已提交
646 647 648 649 650 651 652 653 654 655 656 657 658 659
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;
}

A
Alexander Graf 已提交
660
static void load_linux(void *fw_cfg,
661
                       const char *kernel_filename,
T
ths 已提交
662
		       const char *initrd_filename,
G
Glauber Costa 已提交
663
		       const char *kernel_cmdline,
664
                       target_phys_addr_t max_ram_size)
T
ths 已提交
665 666
{
    uint16_t protocol;
P
Paul Brook 已提交
667
    int setup_size, kernel_size, initrd_size = 0, cmdline_size;
T
ths 已提交
668
    uint32_t initrd_max;
669
    uint8_t header[8192], *setup, *kernel, *initrd_data;
A
Anthony Liguori 已提交
670
    target_phys_addr_t real_addr, prot_addr, cmdline_addr, initrd_addr = 0;
671
    FILE *f;
P
Pascal Terjan 已提交
672
    char *vmode;
T
ths 已提交
673 674 675 676 677 678 679

    /* 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)) ||
A
Alexander Graf 已提交
680 681
	fread(header, 1, MIN(ARRAY_SIZE(header), kernel_size), f) !=
	MIN(ARRAY_SIZE(header), kernel_size)) {
682 683
	fprintf(stderr, "qemu: could not load kernel '%s': %s\n",
		kernel_filename, strerror(errno));
T
ths 已提交
684 685 686 687
	exit(1);
    }

    /* kernel protocol version */
B
bellard 已提交
688
#if 0
T
ths 已提交
689
    fprintf(stderr, "header magic: %#x\n", ldl_p(header+0x202));
B
bellard 已提交
690
#endif
T
ths 已提交
691 692
    if (ldl_p(header+0x202) == 0x53726448)
	protocol = lduw_p(header+0x206);
A
Alexander Graf 已提交
693 694 695
    else {
	/* This looks like a multiboot kernel. If it is, let's stop
	   treating it like a Linux kernel. */
696 697
        if (load_multiboot(fw_cfg, f, kernel_filename, initrd_filename,
                           kernel_cmdline, kernel_size, header))
B
Blue Swirl 已提交
698
            return;
T
ths 已提交
699
	protocol = 0;
A
Alexander Graf 已提交
700
    }
T
ths 已提交
701 702 703

    if (protocol < 0x200 || !(header[0x211] & 0x01)) {
	/* Low kernel */
704 705 706
	real_addr    = 0x90000;
	cmdline_addr = 0x9a000 - cmdline_size;
	prot_addr    = 0x10000;
T
ths 已提交
707 708
    } else if (protocol < 0x202) {
	/* High but ancient kernel */
709 710 711
	real_addr    = 0x90000;
	cmdline_addr = 0x9a000 - cmdline_size;
	prot_addr    = 0x100000;
T
ths 已提交
712 713
    } else {
	/* High and recent kernel */
714 715 716
	real_addr    = 0x10000;
	cmdline_addr = 0x20000;
	prot_addr    = 0x100000;
T
ths 已提交
717 718
    }

B
bellard 已提交
719
#if 0
T
ths 已提交
720
    fprintf(stderr,
721 722 723
	    "qemu: real_addr     = 0x" TARGET_FMT_plx "\n"
	    "qemu: cmdline_addr  = 0x" TARGET_FMT_plx "\n"
	    "qemu: prot_addr     = 0x" TARGET_FMT_plx "\n",
724 725 726
	    real_addr,
	    cmdline_addr,
	    prot_addr);
B
bellard 已提交
727
#endif
T
ths 已提交
728 729 730 731 732 733 734

    /* highest address for loading the initrd */
    if (protocol >= 0x203)
	initrd_max = ldl_p(header+0x22c);
    else
	initrd_max = 0x37ffffff;

G
Glauber Costa 已提交
735 736
    if (initrd_max >= max_ram_size-ACPI_DATA_SIZE)
    	initrd_max = max_ram_size-ACPI_DATA_SIZE-1;
T
ths 已提交
737

738 739 740 741 742
    fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_ADDR, cmdline_addr);
    fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_SIZE, strlen(kernel_cmdline)+1);
    fw_cfg_add_bytes(fw_cfg, FW_CFG_CMDLINE_DATA,
                     (uint8_t*)strdup(kernel_cmdline),
                     strlen(kernel_cmdline)+1);
T
ths 已提交
743 744

    if (protocol >= 0x202) {
745
	stl_p(header+0x228, cmdline_addr);
T
ths 已提交
746 747 748 749 750
    } else {
	stw_p(header+0x20, 0xA33F);
	stw_p(header+0x22, cmdline_addr-real_addr);
    }

P
Pascal Terjan 已提交
751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768
    /* handle vga= parameter */
    vmode = strstr(kernel_cmdline, "vga=");
    if (vmode) {
        unsigned int video_mode;
        /* skip "vga=" */
        vmode += 4;
        if (!strncmp(vmode, "normal", 6)) {
            video_mode = 0xffff;
        } else if (!strncmp(vmode, "ext", 3)) {
            video_mode = 0xfffe;
        } else if (!strncmp(vmode, "ask", 3)) {
            video_mode = 0xfffd;
        } else {
            video_mode = strtol(vmode, NULL, 0);
        }
        stw_p(header+0x1fa, video_mode);
    }

T
ths 已提交
769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788
    /* loader type */
    /* High nybble = B reserved for Qemu; low nybble is revision number.
       If this code is substantially changed, you may want to consider
       incrementing the revision. */
    if (protocol >= 0x200)
	header[0x210] = 0xB0;

    /* heap */
    if (protocol >= 0x201) {
	header[0x211] |= 0x80;	/* CAN_USE_HEAP */
	stw_p(header+0x224, cmdline_addr-real_addr-0x200);
    }

    /* load initrd */
    if (initrd_filename) {
	if (protocol < 0x200) {
	    fprintf(stderr, "qemu: linux kernel too old to load a ram disk\n");
	    exit(1);
	}

789
	initrd_size = get_image_size(initrd_filename);
M
M. Mohan Kumar 已提交
790 791 792 793 794 795
        if (initrd_size < 0) {
            fprintf(stderr, "qemu: error reading initrd %s\n",
                    initrd_filename);
            exit(1);
        }

796
        initrd_addr = (initrd_max-initrd_size) & ~4095;
797

798
        initrd_data = g_malloc(initrd_size);
799 800 801 802 803
        load_image(initrd_filename, initrd_data);

        fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_ADDR, initrd_addr);
        fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, initrd_size);
        fw_cfg_add_bytes(fw_cfg, FW_CFG_INITRD_DATA, initrd_data, initrd_size);
T
ths 已提交
804

805
	stl_p(header+0x218, initrd_addr);
T
ths 已提交
806 807 808
	stl_p(header+0x21c, initrd_size);
    }

809
    /* load kernel and setup */
T
ths 已提交
810 811 812 813
    setup_size = header[0x1f1];
    if (setup_size == 0)
	setup_size = 4;
    setup_size = (setup_size+1)*512;
814
    kernel_size -= setup_size;
T
ths 已提交
815

816 817
    setup  = g_malloc(setup_size);
    kernel = g_malloc(kernel_size);
818
    fseek(f, 0, SEEK_SET);
819 820 821 822 823 824 825 826
    if (fread(setup, 1, setup_size, f) != setup_size) {
        fprintf(stderr, "fread() failed\n");
        exit(1);
    }
    if (fread(kernel, 1, kernel_size, f) != kernel_size) {
        fprintf(stderr, "fread() failed\n");
        exit(1);
    }
T
ths 已提交
827
    fclose(f);
828
    memcpy(setup, header, MIN(sizeof(header), setup_size));
829 830 831 832 833 834 835 836 837

    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, prot_addr);
    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, kernel_size);
    fw_cfg_add_bytes(fw_cfg, FW_CFG_KERNEL_DATA, kernel, kernel_size);

    fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_ADDR, real_addr);
    fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_SIZE, setup_size);
    fw_cfg_add_bytes(fw_cfg, FW_CFG_SETUP_DATA, setup, setup_size);

G
Gleb Natapov 已提交
838 839
    option_rom[nb_option_roms].name = "linuxboot.bin";
    option_rom[nb_option_roms].bootindex = 0;
840
    nb_option_roms++;
T
ths 已提交
841 842
}

B
bellard 已提交
843 844
#define NE2000_NB_MAX 6

B
Blue Swirl 已提交
845 846 847
static const int ne2000_io[NE2000_NB_MAX] = { 0x300, 0x320, 0x340, 0x360,
                                              0x280, 0x380 };
static const int ne2000_irq[NE2000_NB_MAX] = { 9, 10, 11, 3, 4, 5 };
B
bellard 已提交
848

B
Blue Swirl 已提交
849 850
static const int parallel_io[MAX_PARALLEL_PORTS] = { 0x378, 0x278, 0x3bc };
static const int parallel_irq[MAX_PARALLEL_PORTS] = { 7, 7, 7 };
851

852
void pc_init_ne2k_isa(ISABus *bus, NICInfo *nd)
853 854 855 856 857
{
    static int nb_ne2k = 0;

    if (nb_ne2k == NE2000_NB_MAX)
        return;
858
    isa_ne2000_init(bus, ne2000_io[nb_ne2k],
G
Gerd Hoffmann 已提交
859
                    ne2000_irq[nb_ne2k], nd);
860 861 862
    nb_ne2k++;
}

G
Gleb Natapov 已提交
863 864
int cpu_is_bsp(CPUState *env)
{
J
Jan Kiszka 已提交
865 866
    /* We hard-wire the BSP to the first CPU. */
    return env->cpu_index == 0;
G
Gleb Natapov 已提交
867 868
}

B
Blue Swirl 已提交
869
DeviceState *cpu_get_current_apic(void)
870 871 872 873 874 875 876 877
{
    if (cpu_single_env) {
        return cpu_single_env->apic_state;
    } else {
        return NULL;
    }
}

B
Blue Swirl 已提交
878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898
static DeviceState *apic_init(void *env, uint8_t apic_id)
{
    DeviceState *dev;
    SysBusDevice *d;
    static int apic_mapped;

    dev = qdev_create(NULL, "apic");
    qdev_prop_set_uint8(dev, "id", apic_id);
    qdev_prop_set_ptr(dev, "cpu_env", env);
    qdev_init_nofail(dev);
    d = sysbus_from_qdev(dev);

    /* XXX: mapping more APICs at the same memory location */
    if (apic_mapped == 0) {
        /* NOTE: the APIC is directly connected to the CPU - it is not
           on the global memory bus. */
        /* XXX: what if the base changes? */
        sysbus_mmio_map(d, 0, MSI_ADDR_BASE);
        apic_mapped = 1;
    }

899
    msi_supported = true;
B
Blue Swirl 已提交
900 901 902 903

    return dev;
}

B
Blue Swirl 已提交
904 905
/* set CMOS shutdown status register (index 0xF) as S3_resume(0xFE)
   BIOS will read it and start S3 resume at POST Entry */
906
void pc_cmos_set_s3_resume(void *opaque, int irq, int level)
B
Blue Swirl 已提交
907
{
908
    ISADevice *s = opaque;
B
Blue Swirl 已提交
909 910 911 912 913 914

    if (level) {
        rtc_set_memory(s, 0xF, 0xFE);
    }
}

915
void pc_acpi_smi_interrupt(void *opaque, int irq, int level)
B
Blue Swirl 已提交
916 917 918 919 920 921 922 923
{
    CPUState *s = opaque;

    if (level) {
        cpu_interrupt(s, CPU_INTERRUPT_SMI);
    }
}

J
Jan Kiszka 已提交
924
static void pc_cpu_reset(void *opaque)
925 926 927 928
{
    CPUState *env = opaque;

    cpu_reset(env);
J
Jan Kiszka 已提交
929
    env->halted = !cpu_is_bsp(env);
930 931
}

J
Jan Kiszka 已提交
932 933 934 935 936 937 938 939 940 941
static CPUState *pc_new_cpu(const char *cpu_model)
{
    CPUState *env;

    env = cpu_init(cpu_model);
    if (!env) {
        fprintf(stderr, "Unable to find x86 CPU definition\n");
        exit(1);
    }
    if ((env->cpuid_features & CPUID_APIC) || smp_cpus > 1) {
942 943
        env->apic_state = apic_init(env, env->cpuid_apic_id);
    }
J
Jan Kiszka 已提交
944 945
    qemu_register_reset(pc_cpu_reset, env);
    pc_cpu_reset(env);
J
Jan Kiszka 已提交
946 947 948
    return env;
}

949
void pc_cpus_init(const char *cpu_model)
950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966
{
    int i;

    /* init CPUs */
    if (cpu_model == NULL) {
#ifdef TARGET_X86_64
        cpu_model = "qemu64";
#else
        cpu_model = "qemu32";
#endif
    }

    for(i = 0; i < smp_cpus; i++) {
        pc_new_cpu(cpu_model);
    }
}

A
Avi Kivity 已提交
967 968
void pc_memory_init(MemoryRegion *system_memory,
                    const char *kernel_filename,
969 970
                    const char *kernel_cmdline,
                    const char *initrd_filename,
971
                    ram_addr_t below_4g_mem_size,
A
Avi Kivity 已提交
972
                    ram_addr_t above_4g_mem_size,
973
                    MemoryRegion *rom_memory,
A
Avi Kivity 已提交
974
                    MemoryRegion **ram_memory)
B
bellard 已提交
975
{
P
Paul Brook 已提交
976
    char *filename;
T
ths 已提交
977
    int ret, linux_boot, i;
978 979
    MemoryRegion *ram, *bios, *isa_bios, *option_rom_mr;
    MemoryRegion *ram_below_4g, *ram_above_4g;
980
    int bios_size, isa_bios_size;
981
    void *fw_cfg;
982

B
bellard 已提交
983 984
    linux_boot = (kernel_filename != NULL);

985
    /* Allocate RAM.  We allocate it as a single memory region and use
D
Dong Xu Wang 已提交
986
     * aliases to address portions of it, mostly for backwards compatibility
987 988
     * with older qemus that used qemu_ram_alloc().
     */
989
    ram = g_malloc(sizeof(*ram));
990
    memory_region_init_ram(ram, "pc.ram",
991
                           below_4g_mem_size + above_4g_mem_size);
992
    vmstate_register_ram_global(ram);
A
Avi Kivity 已提交
993
    *ram_memory = ram;
994
    ram_below_4g = g_malloc(sizeof(*ram_below_4g));
995 996 997
    memory_region_init_alias(ram_below_4g, "ram-below-4g", ram,
                             0, below_4g_mem_size);
    memory_region_add_subregion(system_memory, 0, ram_below_4g);
998
    if (above_4g_mem_size > 0) {
999
        ram_above_4g = g_malloc(sizeof(*ram_above_4g));
1000 1001 1002 1003
        memory_region_init_alias(ram_above_4g, "ram-above-4g", ram,
                                 below_4g_mem_size, above_4g_mem_size);
        memory_region_add_subregion(system_memory, 0x100000000ULL,
                                    ram_above_4g);
1004
    }
1005

B
bellard 已提交
1006
    /* BIOS load */
1007 1008
    if (bios_name == NULL)
        bios_name = BIOS_FILENAME;
P
Paul Brook 已提交
1009 1010 1011 1012 1013 1014
    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
    if (filename) {
        bios_size = get_image_size(filename);
    } else {
        bios_size = -1;
    }
1015
    if (bios_size <= 0 ||
B
bellard 已提交
1016
        (bios_size % 65536) != 0) {
B
bellard 已提交
1017 1018
        goto bios_error;
    }
1019
    bios = g_malloc(sizeof(*bios));
1020 1021
    memory_region_init_ram(bios, "pc.bios", bios_size);
    vmstate_register_ram_global(bios);
1022
    memory_region_set_readonly(bios, true);
G
Gleb Natapov 已提交
1023
    ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1);
G
Gerd Hoffmann 已提交
1024
    if (ret != 0) {
B
bellard 已提交
1025
    bios_error:
P
Paul Brook 已提交
1026
        fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", bios_name);
B
bellard 已提交
1027 1028
        exit(1);
    }
P
Paul Brook 已提交
1029
    if (filename) {
1030
        g_free(filename);
P
Paul Brook 已提交
1031
    }
B
bellard 已提交
1032 1033 1034 1035
    /* map the last 128KB of the BIOS in ISA space */
    isa_bios_size = bios_size;
    if (isa_bios_size > (128 * 1024))
        isa_bios_size = 128 * 1024;
1036
    isa_bios = g_malloc(sizeof(*isa_bios));
1037 1038
    memory_region_init_alias(isa_bios, "isa-bios", bios,
                             bios_size - isa_bios_size, isa_bios_size);
1039
    memory_region_add_subregion_overlap(rom_memory,
1040 1041 1042 1043 1044
                                        0x100000 - isa_bios_size,
                                        isa_bios,
                                        1);
    memory_region_set_readonly(isa_bios, true);

1045
    option_rom_mr = g_malloc(sizeof(*option_rom_mr));
1046 1047
    memory_region_init_ram(option_rom_mr, "pc.rom", PC_ROM_SIZE);
    vmstate_register_ram_global(option_rom_mr);
1048
    memory_region_add_subregion_overlap(rom_memory,
1049 1050 1051
                                        PC_ROM_MIN_VGA,
                                        option_rom_mr,
                                        1);
1052

A
Alexander Graf 已提交
1053
    /* map all the bios at the top of memory */
1054
    memory_region_add_subregion(rom_memory,
1055 1056
                                (uint32_t)(-bios_size),
                                bios);
A
Alexander Graf 已提交
1057

A
Alexander Graf 已提交
1058
    fw_cfg = bochs_bios_init();
G
Gerd Hoffmann 已提交
1059
    rom_set_fw(fw_cfg);
A
Alexander Graf 已提交
1060

1061
    if (linux_boot) {
1062
        load_linux(fw_cfg, kernel_filename, initrd_filename, kernel_cmdline, below_4g_mem_size);
1063 1064 1065
    }

    for (i = 0; i < nb_option_roms; i++) {
G
Gleb Natapov 已提交
1066
        rom_add_option(option_rom[i].name, option_rom[i].bootindex);
1067
    }
1068 1069
}

1070 1071 1072 1073 1074
qemu_irq *pc_allocate_cpu_irq(void)
{
    return qemu_allocate_irqs(pic_irq_request, NULL, 1);
}

1075
DeviceState *pc_vga_init(ISABus *isa_bus, PCIBus *pci_bus)
1076
{
1077 1078
    DeviceState *dev = NULL;

1079 1080
    if (cirrus_vga_enabled) {
        if (pci_bus) {
1081
            dev = pci_cirrus_vga_init(pci_bus);
1082
        } else {
1083
            dev = isa_cirrus_vga_init(get_system_memory());
1084 1085
        }
    } else if (vmsvga_enabled) {
B
Blue Swirl 已提交
1086
        if (pci_bus) {
1087 1088
            dev = pci_vmsvga_init(pci_bus);
            if (!dev) {
B
Blue Swirl 已提交
1089 1090
                fprintf(stderr, "Warning: vmware_vga not available,"
                        " using standard VGA instead\n");
1091
                dev = pci_vga_init(pci_bus);
B
Blue Swirl 已提交
1092 1093
            }
        } else {
1094
            fprintf(stderr, "%s: vmware_vga: no PCI bus\n", __FUNCTION__);
B
Blue Swirl 已提交
1095
        }
G
Gerd Hoffmann 已提交
1096 1097
#ifdef CONFIG_SPICE
    } else if (qxl_enabled) {
1098 1099 1100
        if (pci_bus) {
            dev = &pci_create_simple(pci_bus, -1, "qxl-vga")->qdev;
        } else {
G
Gerd Hoffmann 已提交
1101
            fprintf(stderr, "%s: qxl: no PCI bus\n", __FUNCTION__);
1102
        }
G
Gerd Hoffmann 已提交
1103
#endif
1104 1105
    } else if (std_vga_enabled) {
        if (pci_bus) {
1106
            dev = pci_vga_init(pci_bus);
1107
        } else {
1108
            dev = isa_vga_init(isa_bus);
1109 1110
        }
    }
1111 1112

    return dev;
1113 1114
}

B
Blue Swirl 已提交
1115 1116 1117 1118 1119 1120 1121 1122 1123
static void cpu_request_exit(void *opaque, int irq, int level)
{
    CPUState *env = cpu_single_env;

    if (env && level) {
        cpu_exit(env);
    }
}

1124
void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
1125
                          ISADevice **rtc_state,
K
Kevin Wolf 已提交
1126
                          ISADevice **floppy,
1127
                          bool no_vmport)
1128 1129 1130
{
    int i;
    DriveInfo *fd[MAX_FD];
1131
    qemu_irq rtc_irq = NULL;
B
Blue Swirl 已提交
1132
    qemu_irq *a20_line;
B
Blue Swirl 已提交
1133
    ISADevice *i8042, *port92, *vmmouse, *pit;
B
Blue Swirl 已提交
1134
    qemu_irq *cpu_exit_irq;
1135 1136 1137 1138 1139 1140

    register_ioport_write(0x80, 1, 1, ioport80_write, NULL);

    register_ioport_write(0xf0, 1, 1, ioportF0_write, NULL);

    if (!no_hpet) {
B
Blue Swirl 已提交
1141
        DeviceState *hpet = sysbus_try_create_simple("hpet", HPET_BASE, NULL);
J
Jan Kiszka 已提交
1142

B
Blue Swirl 已提交
1143
        if (hpet) {
J
Jan Kiszka 已提交
1144 1145
            for (i = 0; i < GSI_NUM_PINS; i++) {
                sysbus_connect_irq(sysbus_from_qdev(hpet), i, gsi[i]);
B
Blue Swirl 已提交
1146 1147
            }
            rtc_irq = qdev_get_gpio_in(hpet, 0);
J
Jan Kiszka 已提交
1148
        }
1149
    }
1150
    *rtc_state = rtc_init(isa_bus, 2000, rtc_irq);
1151 1152 1153

    qemu_register_boot_set(pc_boot_set, *rtc_state);

1154
    pit = pit_init(isa_bus, 0x40, 0);
1155
    pcspk_init(pit);
1156 1157 1158

    for(i = 0; i < MAX_SERIAL_PORTS; i++) {
        if (serial_hds[i]) {
1159
            serial_isa_init(isa_bus, i, serial_hds[i]);
1160 1161 1162 1163 1164
        }
    }

    for(i = 0; i < MAX_PARALLEL_PORTS; i++) {
        if (parallel_hds[i]) {
1165
            parallel_init(isa_bus, i, parallel_hds[i]);
1166 1167 1168
        }
    }

1169
    a20_line = qemu_allocate_irqs(handle_a20_line_change, first_cpu, 2);
1170
    i8042 = isa_create_simple(isa_bus, "i8042");
1171
    i8042_setup_a20_line(i8042, &a20_line[0]);
1172
    if (!no_vmport) {
1173 1174
        vmport_init(isa_bus);
        vmmouse = isa_try_create(isa_bus, "vmmouse");
1175 1176 1177
    } else {
        vmmouse = NULL;
    }
B
Blue Swirl 已提交
1178 1179
    if (vmmouse) {
        qdev_prop_set_ptr(&vmmouse->qdev, "ps2_mouse", i8042);
J
Jan Kiszka 已提交
1180
        qdev_init_nofail(&vmmouse->qdev);
B
Blue Swirl 已提交
1181
    }
1182
    port92 = isa_create_simple(isa_bus, "port92");
1183
    port92_init(port92, &a20_line[1]);
B
Blue Swirl 已提交
1184

B
Blue Swirl 已提交
1185 1186
    cpu_exit_irq = qemu_allocate_irqs(cpu_request_exit, NULL, 1);
    DMA_init(0, cpu_exit_irq);
1187 1188 1189 1190

    for(i = 0; i < MAX_FD; i++) {
        fd[i] = drive_get(IF_FLOPPY, 0, i);
    }
1191
    *floppy = fdctrl_init_isa(isa_bus, fd);
1192 1193
}

1194
void pc_pci_device_init(PCIBus *pci_bus)
1195 1196 1197 1198 1199 1200 1201 1202 1203
{
    int max_bus;
    int bus;

    max_bus = drive_get_max_bus(IF_SCSI);
    for (bus = 0; bus <= max_bus; bus++) {
        pci_create_simple(pci_bus, -1, "lsi53c895a");
    }
}