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xemu/hw/pc.c
Kevin Wolf 34d4260e18 pc: Fix floppy drives with if=none 
Commit 63ffb564 broke floppy devices specified on the command line like
-drive file=...,if=none,id=floppy -global isa-fdc.driveA=floppy because it
relies on drive_get() which works only with -fda/-drive if=floppy.

This patch resembles what we're already doing for IDE, i.e. remember the floppy
device that was created and use that to extract the BlockDriverStates where
needed.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
2011-10-21 17:34:13 +02:00

1207 lines
33 KiB
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/*
* 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 "apic.h"
#include "fdc.h"
#include "ide.h"
#include "pci.h"
#include "vmware_vga.h"
#include "monitor.h"
#include "fw_cfg.h"
#include "hpet_emul.h"
#include "smbios.h"
#include "loader.h"
#include "elf.h"
#include "multiboot.h"
#include "mc146818rtc.h"
#include "msix.h"
#include "sysbus.h"
#include "sysemu.h"
#include "blockdev.h"
#include "ui/qemu-spice.h"
#include "memory.h"
#include "exec-memory.h"
/* output Bochs bios info messages */
//#define DEBUG_BIOS
/* 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
#define BIOS_FILENAME "bios.bin"
#define PC_MAX_BIOS_SIZE (4 * 1024 * 1024)
/* Leave a chunk of memory at the top of RAM for the BIOS ACPI tables. */
#define ACPI_DATA_SIZE 0x10000
#define BIOS_CFG_IOPORT 0x510
#define FW_CFG_ACPI_TABLES (FW_CFG_ARCH_LOCAL + 0)
#define FW_CFG_SMBIOS_ENTRIES (FW_CFG_ARCH_LOCAL + 1)
#define FW_CFG_IRQ0_OVERRIDE (FW_CFG_ARCH_LOCAL + 2)
#define FW_CFG_E820_TABLE (FW_CFG_ARCH_LOCAL + 3)
#define FW_CFG_HPET (FW_CFG_ARCH_LOCAL + 4)
#define MSI_ADDR_BASE 0xfee00000
#define E820_NR_ENTRIES 16
struct e820_entry {
uint64_t address;
uint64_t length;
uint32_t type;
} QEMU_PACKED __attribute((__aligned__(4)));
struct e820_table {
uint32_t count;
struct e820_entry entry[E820_NR_ENTRIES];
} QEMU_PACKED __attribute((__aligned__(4)));
static struct e820_table e820_table;
struct hpet_fw_config hpet_cfg = {.count = UINT8_MAX};
void gsi_handler(void *opaque, int n, int level)
{
GSIState *s = opaque;
DPRINTF("pc: %s GSI %d\n", level ? "raising" : "lowering", n);
if (n < ISA_NUM_IRQS) {
qemu_set_irq(s->i8259_irq[n], level);
}
qemu_set_irq(s->ioapic_irq[n], level);
}
static void ioport80_write(void *opaque, uint32_t addr, uint32_t data)
{
}
/* MSDOS compatibility mode FPU exception support */
static qemu_irq ferr_irq;
void pc_register_ferr_irq(qemu_irq irq)
{
ferr_irq = 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)
{
return cpu_get_ticks();
}
/* SMM support */
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;
}
void cpu_smm_update(CPUState *env)
{
if (smm_set && smm_arg && env == first_cpu)
smm_set(!!(env->hflags & HF_SMM_MASK), smm_arg);
}
/* IRQ handling */
int cpu_get_pic_interrupt(CPUState *env)
{
int intno;
intno = apic_get_interrupt(env->apic_state);
if (intno >= 0) {
return intno;
}
/* read the irq from the PIC */
if (!apic_accept_pic_intr(env->apic_state)) {
return -1;
}
intno = pic_read_irq(isa_pic);
return intno;
}
static void pic_irq_request(void *opaque, int irq, int level)
{
CPUState *env = first_cpu;
DPRINTF("pic_irqs: %s irq %d\n", level? "raise" : "lower", irq);
if (env->apic_state) {
while (env) {
if (apic_accept_pic_intr(env->apic_state)) {
apic_deliver_pic_intr(env->apic_state, level);
}
env = env->next_cpu;
}
} else {
if (level)
cpu_interrupt(env, CPU_INTERRUPT_HARD);
else
cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
}
}
/* PC cmos mappings */
#define REG_EQUIPMENT_BYTE 0x14
static int cmos_get_fd_drive_type(FDriveType fd0)
{
int val;
switch (fd0) {
case FDRIVE_DRV_144:
/* 1.44 Mb 3"5 drive */
val = 4;
break;
case FDRIVE_DRV_288:
/* 2.88 Mb 3"5 drive */
val = 5;
break;
case FDRIVE_DRV_120:
/* 1.2 Mb 5"5 drive */
val = 2;
break;
case FDRIVE_DRV_NONE:
default:
val = 0;
break;
}
return val;
}
static void cmos_init_hd(int type_ofs, int info_ofs, BlockDriverState *hd,
ISADevice *s)
{
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;
}
static int set_boot_dev(ISADevice *s, const char *boot_device, int fd_bootchk)
{
#define PC_MAX_BOOT_DEVICES 3
int nbds, bds[3] = { 0, };
int i;
nbds = strlen(boot_device);
if (nbds > PC_MAX_BOOT_DEVICES) {
error_report("Too many boot devices for PC");
return(1);
}
for (i = 0; i < nbds; i++) {
bds[i] = boot_device2nibble(boot_device[i]);
if (bds[i] == 0) {
error_report("Invalid boot device for PC: '%c'",
boot_device[i]);
return(1);
}
}
rtc_set_memory(s, 0x3d, (bds[1] << 4) | bds[0]);
rtc_set_memory(s, 0x38, (bds[2] << 4) | (fd_bootchk ? 0x0 : 0x1));
return(0);
}
static int pc_boot_set(void *opaque, const char *boot_device)
{
return set_boot_dev(opaque, boot_device, 0);
}
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);
}
void pc_cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size,
const char *boot_device,
ISADevice *floppy, BusState *idebus0, BusState *idebus1,
ISADevice *s)
{
int val, nb, nb_heads, max_track, last_sect, i;
FDriveType fd_type[2];
BlockDriverState *fd[MAX_FD];
static pc_cmos_init_late_arg arg;
/* 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 (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);
}
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 the number of CPU */
rtc_set_memory(s, 0x5f, smp_cpus - 1);
/* set boot devices, and disable floppy signature check if requested */
if (set_boot_dev(s, boot_device, fd_bootchk)) {
exit(1);
}
/* floppy type */
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]);
} else {
fd_type[i] = FDRIVE_DRV_NONE;
}
}
}
val = (cmos_get_fd_drive_type(fd_type[0]) << 4) |
cmos_get_fd_drive_type(fd_type[1]);
rtc_set_memory(s, 0x10, val);
val = 0;
nb = 0;
if (fd_type[0] < FDRIVE_DRV_NONE) {
nb++;
}
if (fd_type[1] < FDRIVE_DRV_NONE) {
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 */
arg.rtc_state = s;
arg.idebus0 = idebus0;
arg.idebus1 = idebus1;
qemu_register_reset(pc_cmos_init_late, &arg);
}
/* port 92 stuff: could be split off */
typedef struct Port92State {
ISADevice dev;
MemoryRegion io;
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;
}
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
};
static int port92_initfn(ISADevice *dev)
{
Port92State *s = DO_UPCAST(Port92State, dev, dev);
memory_region_init_io(&s->io, &port92_ops, s, "port92", 1);
isa_register_ioport(dev, &s->io, 0x92);
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)
static void handle_a20_line_change(void *opaque, int irq, int level)
{
CPUState *cpu = opaque;
/* XXX: send to all CPUs ? */
/* XXX: add logic to handle multiple A20 line sources */
cpu_x86_set_a20(cpu, level);
}
/***********************************************************/
/* 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:
/* used to be panic, now unused */
break;
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:
exit((val << 1) | 1);
case 0x500:
case 0x503:
#ifdef DEBUG_BIOS
fprintf(stderr, "%c", val);
#endif
break;
}
}
int e820_add_entry(uint64_t address, uint64_t length, uint32_t type)
{
int index = le32_to_cpu(e820_table.count);
struct e820_entry *entry;
if (index >= E820_NR_ENTRIES)
return -EBUSY;
entry = &e820_table.entry[index++];
entry->address = cpu_to_le64(address);
entry->length = cpu_to_le64(length);
entry->type = cpu_to_le32(type);
e820_table.count = cpu_to_le32(index);
return index;
}
static void *bochs_bios_init(void)
{
void *fw_cfg;
uint8_t *smbios_table;
size_t smbios_len;
uint64_t *numa_fw_cfg;
int i, j;
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, 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);
fw_cfg = fw_cfg_init(BIOS_CFG_IOPORT, BIOS_CFG_IOPORT + 1, 0, 0);
fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);
fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
fw_cfg_add_bytes(fw_cfg, FW_CFG_ACPI_TABLES, (uint8_t *)acpi_tables,
acpi_tables_len);
fw_cfg_add_bytes(fw_cfg, FW_CFG_IRQ0_OVERRIDE, &irq0override, 1);
smbios_table = smbios_get_table(&smbios_len);
if (smbios_table)
fw_cfg_add_bytes(fw_cfg, FW_CFG_SMBIOS_ENTRIES,
smbios_table, smbios_len);
fw_cfg_add_bytes(fw_cfg, FW_CFG_E820_TABLE, (uint8_t *)&e820_table,
sizeof(struct e820_table));
fw_cfg_add_bytes(fw_cfg, FW_CFG_HPET, (uint8_t *)&hpet_cfg,
sizeof(struct hpet_fw_config));
/* 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.
*/
numa_fw_cfg = g_malloc0((1 + smp_cpus + nb_numa_nodes) * 8);
numa_fw_cfg[0] = cpu_to_le64(nb_numa_nodes);
for (i = 0; i < smp_cpus; i++) {
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++) {
numa_fw_cfg[smp_cpus + 1 + i] = cpu_to_le64(node_mem[i]);
}
fw_cfg_add_bytes(fw_cfg, FW_CFG_NUMA, (uint8_t *)numa_fw_cfg,
(1 + smp_cpus + nb_numa_nodes) * 8);
return fw_cfg;
}
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(void *fw_cfg,
const char *kernel_filename,
const char *initrd_filename,
const char *kernel_cmdline,
target_phys_addr_t max_ram_size)
{
uint16_t protocol;
int setup_size, kernel_size, initrd_size = 0, cmdline_size;
uint32_t initrd_max;
uint8_t header[8192], *setup, *kernel, *initrd_data;
target_phys_addr_t real_addr, prot_addr, cmdline_addr, initrd_addr = 0;
FILE *f;
char *vmode;
/* 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, MIN(ARRAY_SIZE(header), kernel_size), f) !=
MIN(ARRAY_SIZE(header), kernel_size)) {
fprintf(stderr, "qemu: could not load kernel '%s': %s\n",
kernel_filename, strerror(errno));
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 {
/* This looks like a multiboot kernel. If it is, let's stop
treating it like a Linux kernel. */
if (load_multiboot(fw_cfg, f, kernel_filename, initrd_filename,
kernel_cmdline, kernel_size, header))
return;
protocol = 0;
}
if (protocol < 0x200 || !(header[0x211] & 0x01)) {
/* Low kernel */
real_addr = 0x90000;
cmdline_addr = 0x9a000 - cmdline_size;
prot_addr = 0x10000;
} else if (protocol < 0x202) {
/* High but ancient kernel */
real_addr = 0x90000;
cmdline_addr = 0x9a000 - cmdline_size;
prot_addr = 0x100000;
} else {
/* High and recent kernel */
real_addr = 0x10000;
cmdline_addr = 0x20000;
prot_addr = 0x100000;
}
#if 0
fprintf(stderr,
"qemu: real_addr = 0x" TARGET_FMT_plx "\n"
"qemu: cmdline_addr = 0x" TARGET_FMT_plx "\n"
"qemu: prot_addr = 0x" TARGET_FMT_plx "\n",
real_addr,
cmdline_addr,
prot_addr);
#endif
/* highest address for loading the initrd */
if (protocol >= 0x203)
initrd_max = ldl_p(header+0x22c);
else
initrd_max = 0x37ffffff;
if (initrd_max >= max_ram_size-ACPI_DATA_SIZE)
initrd_max = max_ram_size-ACPI_DATA_SIZE-1;
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);
if (protocol >= 0x202) {
stl_p(header+0x228, cmdline_addr);
} else {
stw_p(header+0x20, 0xA33F);
stw_p(header+0x22, cmdline_addr-real_addr);
}
/* 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);
}
/* 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);
}
initrd_size = get_image_size(initrd_filename);
if (initrd_size < 0) {
fprintf(stderr, "qemu: error reading initrd %s\n",
initrd_filename);
exit(1);
}
initrd_addr = (initrd_max-initrd_size) & ~4095;
initrd_data = g_malloc(initrd_size);
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);
stl_p(header+0x218, initrd_addr);
stl_p(header+0x21c, initrd_size);
}
/* load kernel and setup */
setup_size = header[0x1f1];
if (setup_size == 0)
setup_size = 4;
setup_size = (setup_size+1)*512;
kernel_size -= setup_size;
setup = g_malloc(setup_size);
kernel = g_malloc(kernel_size);
fseek(f, 0, SEEK_SET);
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);
}
fclose(f);
memcpy(setup, header, MIN(sizeof(header), setup_size));
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);
option_rom[nb_option_roms].name = "linuxboot.bin";
option_rom[nb_option_roms].bootindex = 0;
nb_option_roms++;
}
#define NE2000_NB_MAX 6
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 };
static const int parallel_io[MAX_PARALLEL_PORTS] = { 0x378, 0x278, 0x3bc };
static const int parallel_irq[MAX_PARALLEL_PORTS] = { 7, 7, 7 };
void pc_init_ne2k_isa(NICInfo *nd)
{
static int nb_ne2k = 0;
if (nb_ne2k == NE2000_NB_MAX)
return;
isa_ne2000_init(ne2000_io[nb_ne2k],
ne2000_irq[nb_ne2k], nd);
nb_ne2k++;
}
int cpu_is_bsp(CPUState *env)
{
/* We hard-wire the BSP to the first CPU. */
return env->cpu_index == 0;
}
DeviceState *cpu_get_current_apic(void)
{
if (cpu_single_env) {
return cpu_single_env->apic_state;
} else {
return NULL;
}
}
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;
}
msix_supported = 1;
return dev;
}
/* set CMOS shutdown status register (index 0xF) as S3_resume(0xFE)
BIOS will read it and start S3 resume at POST Entry */
void pc_cmos_set_s3_resume(void *opaque, int irq, int level)
{
ISADevice *s = opaque;
if (level) {
rtc_set_memory(s, 0xF, 0xFE);
}
}
void pc_acpi_smi_interrupt(void *opaque, int irq, int level)
{
CPUState *s = opaque;
if (level) {
cpu_interrupt(s, CPU_INTERRUPT_SMI);
}
}
static void pc_cpu_reset(void *opaque)
{
CPUState *env = opaque;
cpu_reset(env);
env->halted = !cpu_is_bsp(env);
}
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) {
env->cpuid_apic_id = env->cpu_index;
env->apic_state = apic_init(env, env->cpuid_apic_id);
}
qemu_register_reset(pc_cpu_reset, env);
pc_cpu_reset(env);
return env;
}
void pc_cpus_init(const char *cpu_model)
{
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);
}
}
void pc_memory_init(MemoryRegion *system_memory,
const char *kernel_filename,
const char *kernel_cmdline,
const char *initrd_filename,
ram_addr_t below_4g_mem_size,
ram_addr_t above_4g_mem_size,
MemoryRegion *rom_memory,
MemoryRegion **ram_memory)
{
char *filename;
int ret, linux_boot, i;
MemoryRegion *ram, *bios, *isa_bios, *option_rom_mr;
MemoryRegion *ram_below_4g, *ram_above_4g;
int bios_size, isa_bios_size;
void *fw_cfg;
linux_boot = (kernel_filename != NULL);
/* Allocate RAM. We allocate it as a single memory region and use
* aliases to address portions of it, mostly for backwards compatiblity
* with older qemus that used qemu_ram_alloc().
*/
ram = g_malloc(sizeof(*ram));
memory_region_init_ram(ram, NULL, "pc.ram",
below_4g_mem_size + above_4g_mem_size);
*ram_memory = ram;
ram_below_4g = g_malloc(sizeof(*ram_below_4g));
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);
if (above_4g_mem_size > 0) {
ram_above_4g = g_malloc(sizeof(*ram_above_4g));
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);
}
/* BIOS load */
if (bios_name == NULL)
bios_name = BIOS_FILENAME;
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
if (filename) {
bios_size = get_image_size(filename);
} else {
bios_size = -1;
}
if (bios_size <= 0 ||
(bios_size % 65536) != 0) {
goto bios_error;
}
bios = g_malloc(sizeof(*bios));
memory_region_init_ram(bios, NULL, "pc.bios", bios_size);
memory_region_set_readonly(bios, true);
ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1);
if (ret != 0) {
bios_error:
fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", bios_name);
exit(1);
}
if (filename) {
g_free(filename);
}
/* 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;
isa_bios = g_malloc(sizeof(*isa_bios));
memory_region_init_alias(isa_bios, "isa-bios", bios,
bios_size - isa_bios_size, isa_bios_size);
memory_region_add_subregion_overlap(rom_memory,
0x100000 - isa_bios_size,
isa_bios,
1);
memory_region_set_readonly(isa_bios, true);
option_rom_mr = g_malloc(sizeof(*option_rom_mr));
memory_region_init_ram(option_rom_mr, NULL, "pc.rom", PC_ROM_SIZE);
memory_region_add_subregion_overlap(rom_memory,
PC_ROM_MIN_VGA,
option_rom_mr,
1);
/* map all the bios at the top of memory */
memory_region_add_subregion(rom_memory,
(uint32_t)(-bios_size),
bios);
fw_cfg = bochs_bios_init();
rom_set_fw(fw_cfg);
if (linux_boot) {
load_linux(fw_cfg, kernel_filename, initrd_filename, kernel_cmdline, below_4g_mem_size);
}
for (i = 0; i < nb_option_roms; i++) {
rom_add_option(option_rom[i].name, option_rom[i].bootindex);
}
}
qemu_irq *pc_allocate_cpu_irq(void)
{
return qemu_allocate_irqs(pic_irq_request, NULL, 1);
}
void pc_vga_init(PCIBus *pci_bus)
{
if (cirrus_vga_enabled) {
if (pci_bus) {
pci_cirrus_vga_init(pci_bus);
} else {
isa_cirrus_vga_init(get_system_memory());
}
} else if (vmsvga_enabled) {
if (pci_bus) {
if (!pci_vmsvga_init(pci_bus)) {
fprintf(stderr, "Warning: vmware_vga not available,"
" using standard VGA instead\n");
pci_vga_init(pci_bus);
}
} else {
fprintf(stderr, "%s: vmware_vga: no PCI bus\n", __FUNCTION__);
}
#ifdef CONFIG_SPICE
} else if (qxl_enabled) {
if (pci_bus)
pci_create_simple(pci_bus, -1, "qxl-vga");
else
fprintf(stderr, "%s: qxl: no PCI bus\n", __FUNCTION__);
#endif
} else if (std_vga_enabled) {
if (pci_bus) {
pci_vga_init(pci_bus);
} else {
isa_vga_init();
}
}
/*
* sga does not suppress normal vga output. So a machine can have both a
* vga card and sga manually enabled. Output will be seen on both.
* For nographic case, sga is enabled at all times
*/
if (display_type == DT_NOGRAPHIC) {
isa_create_simple("sga");
}
}
static void cpu_request_exit(void *opaque, int irq, int level)
{
CPUState *env = cpu_single_env;
if (env && level) {
cpu_exit(env);
}
}
void pc_basic_device_init(qemu_irq *gsi,
ISADevice **rtc_state,
ISADevice **floppy,
bool no_vmport)
{
int i;
DriveInfo *fd[MAX_FD];
qemu_irq rtc_irq = NULL;
qemu_irq *a20_line;
ISADevice *i8042, *port92, *vmmouse, *pit;
qemu_irq *cpu_exit_irq;
register_ioport_write(0x80, 1, 1, ioport80_write, NULL);
register_ioport_write(0xf0, 1, 1, ioportF0_write, NULL);
if (!no_hpet) {
DeviceState *hpet = sysbus_try_create_simple("hpet", HPET_BASE, NULL);
if (hpet) {
for (i = 0; i < GSI_NUM_PINS; i++) {
sysbus_connect_irq(sysbus_from_qdev(hpet), i, gsi[i]);
}
rtc_irq = qdev_get_gpio_in(hpet, 0);
}
}
*rtc_state = rtc_init(2000, rtc_irq);
qemu_register_boot_set(pc_boot_set, *rtc_state);
pit = pit_init(0x40, 0);
pcspk_init(pit);
for(i = 0; i < MAX_SERIAL_PORTS; i++) {
if (serial_hds[i]) {
serial_isa_init(i, serial_hds[i]);
}
}
for(i = 0; i < MAX_PARALLEL_PORTS; i++) {
if (parallel_hds[i]) {
parallel_init(i, parallel_hds[i]);
}
}
a20_line = qemu_allocate_irqs(handle_a20_line_change, first_cpu, 2);
i8042 = isa_create_simple("i8042");
i8042_setup_a20_line(i8042, &a20_line[0]);
if (!no_vmport) {
vmport_init();
vmmouse = isa_try_create("vmmouse");
} else {
vmmouse = NULL;
}
if (vmmouse) {
qdev_prop_set_ptr(&vmmouse->qdev, "ps2_mouse", i8042);
qdev_init_nofail(&vmmouse->qdev);
}
port92 = isa_create_simple("port92");
port92_init(port92, &a20_line[1]);
cpu_exit_irq = qemu_allocate_irqs(cpu_request_exit, NULL, 1);
DMA_init(0, cpu_exit_irq);
for(i = 0; i < MAX_FD; i++) {
fd[i] = drive_get(IF_FLOPPY, 0, i);
}
*floppy = fdctrl_init_isa(fd);
}
void pc_pci_device_init(PCIBus *pci_bus)
{
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");
}
}
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