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77873196f3
qemu-e2k/hw/pc.c
Alexander Graf 77873196f3 Convert multiboot to fw_cfg backed data storage 
Right now we load the guest kernel to RAM, fire off the BIOS, hope it
doesn't clobber memory and run an option rom that jumps into the kernel.

That breaks with SeaBIOS, as that clears memory. So let's read all
kernel, module etc. data using the fw_cfg interface when in the int19
handler.

This patch implements said mechanism for multiboot.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-11-17 10:39:02 -06:00

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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 "fdc.h"
#include "pci.h"
#include "block.h"
#include "sysemu.h"
#include "audio/audio.h"
#include "net.h"
#include "smbus.h"
#include "boards.h"
#include "monitor.h"
#include "fw_cfg.h"
#include "hpet_emul.h"
#include "watchdog.h"
#include "smbios.h"
#include "ide.h"
#include "loader.h"
#include "elf.h"
/* output Bochs bios info messages */
//#define DEBUG_BIOS
/* Show multiboot debug output */
//#define DEBUG_MULTIBOOT
#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 MAX_IDE_BUS 2
static fdctrl_t *floppy_controller;
static RTCState *rtc_state;
static PITState *pit;
static PCII440FXState *i440fx_state;
typedef struct isa_irq_state {
qemu_irq *i8259;
qemu_irq *ioapic;
} IsaIrqState;
static void isa_irq_handler(void *opaque, int n, int level)
{
IsaIrqState *isa = (IsaIrqState *)opaque;
if (n < 16) {
qemu_set_irq(isa->i8259[n], level);
}
if (isa->ioapic)
qemu_set_irq(isa->ioapic[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;
/* 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 */
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 = first_cpu;
if (env->apic_state) {
while (env) {
if (apic_accept_pic_intr(env))
apic_deliver_pic_intr(env, 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(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;
}
/* copy/pasted from cmos_init, should be made a general function
and used there as well */
static int pc_boot_set(void *opaque, const char *boot_device)
{
Monitor *mon = cur_mon;
#define PC_MAX_BOOT_DEVICES 3
RTCState *s = (RTCState *)opaque;
int nbds, bds[3] = { 0, };
int i;
nbds = strlen(boot_device);
if (nbds > PC_MAX_BOOT_DEVICES) {
monitor_printf(mon, "Too many boot devices for PC\n");
return(1);
}
for (i = 0; i < nbds; i++) {
bds[i] = boot_device2nibble(boot_device[i]);
if (bds[i] == 0) {
monitor_printf(mon, "Invalid boot device for PC: '%c'\n",
boot_device[i]);
return(1);
}
}
rtc_set_memory(s, 0x3d, (bds[1] << 4) | bds[0]);
rtc_set_memory(s, 0x38, (bds[2] << 4));
return(0);
}
/* hd_table must contain 4 block drivers */
static void cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size,
const char *boot_device, DriveInfo **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 (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 */
#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]->bdrv);
if (hd_table[1])
cmos_init_hd(0x1a, 0x24, hd_table[1]->bdrv);
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]->bdrv);
if (translation == BIOS_ATA_TRANSLATION_AUTO) {
bdrv_get_geometry_hint(hd_table[i]->bdrv, &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)
{
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, 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);
/* 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 = qemu_mallocz((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;
}
/* 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 rom[512], *p, *reloc;
uint8_t sum;
int i;
memset(rom, 0, sizeof(rom));
p = rom;
/* Make sure we have an option rom signature */
*p++ = 0x55;
*p++ = 0xaa;
/* ROM size in sectors*/
*p++ = 1;
/* Hook int19 */
*p++ = 0x50; /* push ax */
*p++ = 0x1e; /* push ds */
*p++ = 0x31; *p++ = 0xc0; /* xor ax, ax */
*p++ = 0x8e; *p++ = 0xd8; /* mov ax, ds */
*p++ = 0xc7; *p++ = 0x06; /* movvw _start,0x64 */
*p++ = 0x64; *p++ = 0x00;
reloc = p;
*p++ = 0x00; *p++ = 0x00;
*p++ = 0x8c; *p++ = 0x0e; /* mov cs,0x66 */
*p++ = 0x66; *p++ = 0x00;
*p++ = 0x1f; /* pop ds */
*p++ = 0x58; /* pop ax */
*p++ = 0xcb; /* lret */
/* Actual code */
*reloc = (p - rom);
*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;
/* sign rom */
sum = 0;
for (i = 0; i < (sizeof(rom) - 1); i++)
sum += rom[i];
rom[sizeof(rom) - 1] = -sum;
rom_add_blob("linux-bootsect", rom, sizeof(rom),
PC_ROM_MIN_OPTION, PC_ROM_MAX, PC_ROM_ALIGN);
}
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;
}
#define MULTIBOOT_STRUCT_ADDR 0x9000
#if MULTIBOOT_STRUCT_ADDR > 0xf0000
#error multiboot struct needs to fit in 16 bit real mode
#endif
static int load_multiboot(void *fw_cfg,
FILE *f,
const char *kernel_filename,
const char *initrd_filename,
const char *kernel_cmdline,
uint8_t *header)
{
int i, is_multiboot = 0;
uint32_t flags = 0;
uint32_t mh_entry_addr;
uint32_t mh_load_addr;
uint32_t mb_kernel_size;
uint32_t mmap_addr = MULTIBOOT_STRUCT_ADDR;
uint32_t mb_bootinfo = MULTIBOOT_STRUCT_ADDR + 0x500;
uint32_t mb_mod_end;
uint8_t bootinfo[0x500];
uint32_t cmdline = 0x200;
uint8_t *mb_kernel_data;
uint8_t *mb_bootinfo_data;
/* Ok, let's see if it is a multiboot image.
The header is 12x32bit long, so the latest entry may be 8192 - 48. */
for (i = 0; i < (8192 - 48); i += 4) {
if (ldl_p(header+i) == 0x1BADB002) {
uint32_t checksum = ldl_p(header+i+8);
flags = ldl_p(header+i+4);
checksum += flags;
checksum += (uint32_t)0x1BADB002;
if (!checksum) {
is_multiboot = 1;
break;
}
}
}
if (!is_multiboot)
return 0; /* no multiboot */
#ifdef DEBUG_MULTIBOOT
fprintf(stderr, "qemu: I believe we found a multiboot image!\n");
#endif
memset(bootinfo, 0, sizeof(bootinfo));
if (flags & 0x00000004) { /* MULTIBOOT_HEADER_HAS_VBE */
fprintf(stderr, "qemu: multiboot knows VBE. we don't.\n");
}
if (!(flags & 0x00010000)) { /* MULTIBOOT_HEADER_HAS_ADDR */
uint64_t elf_entry;
int kernel_size;
fclose(f);
kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL,
0, ELF_MACHINE, 0);
if (kernel_size < 0) {
fprintf(stderr, "Error while loading elf kernel\n");
exit(1);
}
mh_load_addr = mh_entry_addr = elf_entry;
mb_kernel_size = kernel_size;
mb_kernel_data = qemu_malloc(mb_kernel_size);
if (rom_copy(mb_kernel_data, elf_entry, kernel_size) != kernel_size) {
fprintf(stderr, "Error while fetching elf kernel from rom\n");
exit(1);
}
#ifdef DEBUG_MULTIBOOT
fprintf(stderr, "qemu: loading multiboot-elf kernel (%#x bytes) with entry %#zx\n",
mb_kernel_size, (size_t)mh_entry_addr);
#endif
} else {
/* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_ADDR. */
uint32_t mh_header_addr = ldl_p(header+i+12);
mh_load_addr = ldl_p(header+i+16);
#ifdef DEBUG_MULTIBOOT
uint32_t mh_load_end_addr = ldl_p(header+i+20);
uint32_t mh_bss_end_addr = ldl_p(header+i+24);
#endif
uint32_t mb_kernel_text_offset = i - (mh_header_addr - mh_load_addr);
mh_entry_addr = ldl_p(header+i+28);
mb_kernel_size = get_file_size(f) - mb_kernel_text_offset;
/* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_VBE.
uint32_t mh_mode_type = ldl_p(header+i+32);
uint32_t mh_width = ldl_p(header+i+36);
uint32_t mh_height = ldl_p(header+i+40);
uint32_t mh_depth = ldl_p(header+i+44); */
#ifdef DEBUG_MULTIBOOT
fprintf(stderr, "multiboot: mh_header_addr = %#x\n", mh_header_addr);
fprintf(stderr, "multiboot: mh_load_addr = %#x\n", mh_load_addr);
fprintf(stderr, "multiboot: mh_load_end_addr = %#x\n", mh_load_end_addr);
fprintf(stderr, "multiboot: mh_bss_end_addr = %#x\n", mh_bss_end_addr);
fprintf(stderr, "qemu: loading multiboot kernel (%#x bytes) at %#x\n",
mb_kernel_size, mh_load_addr);
#endif
mb_kernel_data = qemu_malloc(mb_kernel_size);
fseek(f, mb_kernel_text_offset, SEEK_SET);
fread(mb_kernel_data, 1, mb_kernel_size, f);
fclose(f);
}
/* blob size is only the kernel for now */
mb_mod_end = mh_load_addr + mb_kernel_size;
/* load modules */
stl_p(bootinfo + 20, 0x0); /* mods_count */
if (initrd_filename) {
uint32_t mb_mod_info = 0x100;
uint32_t mb_mod_cmdline = 0x300;
uint32_t mb_mod_start = mh_load_addr;
uint32_t mb_mod_length = mb_kernel_size;
char *next_initrd;
char *next_space;
int mb_mod_count = 0;
do {
if (mb_mod_info + 16 > mb_mod_cmdline) {
printf("WARNING: Too many modules loaded, aborting.\n");
break;
}
next_initrd = strchr(initrd_filename, ',');
if (next_initrd)
*next_initrd = '\0';
/* if a space comes after the module filename, treat everything
after that as parameters */
pstrcpy((char*)bootinfo + mb_mod_cmdline,
sizeof(bootinfo) - mb_mod_cmdline,
initrd_filename);
stl_p(bootinfo + mb_mod_info + 8, mb_bootinfo + mb_mod_cmdline); /* string */
mb_mod_cmdline += strlen(initrd_filename) + 1;
if (mb_mod_cmdline > sizeof(bootinfo)) {
mb_mod_cmdline = sizeof(bootinfo);
printf("WARNING: Too many module cmdlines loaded, aborting.\n");
break;
}
if ((next_space = strchr(initrd_filename, ' ')))
*next_space = '\0';
#ifdef DEBUG_MULTIBOOT
printf("multiboot loading module: %s\n", initrd_filename);
#endif
mb_mod_start = (mb_mod_start + mb_mod_length + (TARGET_PAGE_SIZE - 1))
& (TARGET_PAGE_MASK);
mb_mod_length = get_image_size(initrd_filename);
if (mb_mod_length < 0) {
fprintf(stderr, "failed to get %s image size\n", initrd_filename);
exit(1);
}
mb_mod_end = mb_mod_start + mb_mod_length;
mb_mod_count++;
/* append module data at the end of last module */
mb_kernel_data = qemu_realloc(mb_kernel_data,
mh_load_addr - mb_mod_end);
load_image(initrd_filename,
mb_kernel_data + mb_mod_start - mh_load_addr);
stl_p(bootinfo + mb_mod_info + 0, mb_mod_start);
stl_p(bootinfo + mb_mod_info + 4, mb_mod_start + mb_mod_length);
stl_p(bootinfo + mb_mod_info + 12, 0x0); /* reserved */
#ifdef DEBUG_MULTIBOOT
printf("mod_start: %#x\nmod_end: %#x\n", mb_mod_start,
mb_mod_start + mb_mod_length);
#endif
initrd_filename = next_initrd+1;
mb_mod_info += 16;
} while (next_initrd);
stl_p(bootinfo + 20, mb_mod_count); /* mods_count */
stl_p(bootinfo + 24, mb_bootinfo + 0x100); /* mods_addr */
}
/* Commandline support */
stl_p(bootinfo + 16, mb_bootinfo + cmdline);
snprintf((char*)bootinfo + cmdline, 0x100, "%s %s",
kernel_filename, kernel_cmdline);
/* the kernel is where we want it to be now */
#define MULTIBOOT_FLAGS_MEMORY (1 << 0)
#define MULTIBOOT_FLAGS_BOOT_DEVICE (1 << 1)
#define MULTIBOOT_FLAGS_CMDLINE (1 << 2)
#define MULTIBOOT_FLAGS_MODULES (1 << 3)
#define MULTIBOOT_FLAGS_MMAP (1 << 6)
stl_p(bootinfo, MULTIBOOT_FLAGS_MEMORY
| MULTIBOOT_FLAGS_BOOT_DEVICE
| MULTIBOOT_FLAGS_CMDLINE
| MULTIBOOT_FLAGS_MODULES
| MULTIBOOT_FLAGS_MMAP);
stl_p(bootinfo + 4, 640); /* mem_lower */
stl_p(bootinfo + 8, ram_size / 1024); /* mem_upper */
stl_p(bootinfo + 12, 0x8001ffff); /* XXX: use the -boot switch? */
stl_p(bootinfo + 48, mmap_addr); /* mmap_addr */
#ifdef DEBUG_MULTIBOOT
fprintf(stderr, "multiboot: mh_entry_addr = %#x\n", mh_entry_addr);
#endif
/* save bootinfo off the stack */
mb_bootinfo_data = qemu_malloc(sizeof(bootinfo));
memcpy(mb_bootinfo_data, bootinfo, sizeof(bootinfo));
/* Pass variables to option rom */
fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ENTRY, mh_entry_addr);
fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, mh_load_addr);
fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, mb_mod_end - mh_load_addr);
fw_cfg_add_bytes(fw_cfg, FW_CFG_KERNEL_DATA, mb_kernel_data,
mb_mod_end - mh_load_addr);
fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_ADDR, mb_bootinfo);
fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, sizeof(bootinfo));
fw_cfg_add_bytes(fw_cfg, FW_CFG_INITRD_DATA, mb_bootinfo_data,
sizeof(bootinfo));
option_rom[nb_option_roms] = "multiboot.bin";
nb_option_roms++;
return 1; /* yes, we are multiboot */
}
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;
uint32_t gpr[8];
uint16_t seg[6];
uint16_t real_seg;
int setup_size, kernel_size, initrd_size = 0, cmdline_size;
uint32_t initrd_max;
uint8_t header[8192], *setup, *kernel;
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, 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;
/* kernel command line */
rom_add_blob_fixed("cmdline", kernel_cmdline,
strlen(kernel_cmdline)+1, cmdline_addr);
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);
initrd_addr = (initrd_max-initrd_size) & ~4095;
rom_add_file_fixed(initrd_filename, initrd_addr);
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 = qemu_malloc(setup_size);
kernel = qemu_malloc(kernel_size);
fseek(f, 0, SEEK_SET);
fread(setup, 1, setup_size, f);
fread(kernel, 1, kernel_size, f);
fclose(f);
memcpy(setup, header, MIN(sizeof(header), setup_size));
rom_add_blob_fixed("linux-setup", setup,
setup_size, real_addr);
rom_add_blob_fixed(kernel_filename, kernel,
kernel_size, prot_addr);
qemu_free(setup);
qemu_free(kernel);
/* generate bootsector to set up the initial register state */
real_seg = real_addr >> 4;
seg[0] = seg[2] = seg[3] = seg[4] = seg[4] = real_seg;
seg[1] = real_seg+0x20; /* CS */
memset(gpr, 0, sizeof gpr);
gpr[4] = cmdline_addr-real_addr-16; /* SP (-16 is paranoia) */
generate_bootsect(gpr, seg, 0);
}
static const int ide_iobase[2] = { 0x1f0, 0x170 };
static const int ide_iobase2[2] = { 0x3f6, 0x376 };
static const int ide_irq[2] = { 14, 15 };
#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 };
#ifdef HAS_AUDIO
static void audio_init (PCIBus *pci_bus, qemu_irq *pic)
{
struct soundhw *c;
for (c = soundhw; c->name; ++c) {
if (c->enabled) {
if (c->isa) {
c->init.init_isa(pic);
} else {
if (pci_bus) {
c->init.init_pci(pci_bus);
}
}
}
}
}
#endif
static 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)
{
return env->cpuid_apic_id == 0;
}
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;
/* APIC reset callback resets cpu */
apic_init(env);
} else {
qemu_register_reset((QEMUResetHandler*)cpu_reset, env);
}
return env;
}
/* PC hardware initialisation */
static void pc_init1(ram_addr_t ram_size,
const char *boot_device,
const char *kernel_filename,
const char *kernel_cmdline,
const char *initrd_filename,
const char *cpu_model,
int pci_enabled)
{
char *filename;
int ret, linux_boot, i;
ram_addr_t ram_addr, bios_offset, option_rom_offset;
ram_addr_t below_4g_mem_size, above_4g_mem_size = 0;
int bios_size, isa_bios_size;
PCIBus *pci_bus;
ISADevice *isa_dev;
int piix3_devfn = -1;
CPUState *env;
qemu_irq *cpu_irq;
qemu_irq *isa_irq;
qemu_irq *i8259;
IsaIrqState *isa_irq_state;
DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
DriveInfo *fd[MAX_FD];
void *fw_cfg;
if (ram_size >= 0xe0000000 ) {
above_4g_mem_size = ram_size - 0xe0000000;
below_4g_mem_size = 0xe0000000;
} else {
below_4g_mem_size = ram_size;
}
linux_boot = (kernel_filename != NULL);
/* 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++) {
env = pc_new_cpu(cpu_model);
}
vmport_init();
/* allocate RAM */
ram_addr = qemu_ram_alloc(0xa0000);
cpu_register_physical_memory(0, 0xa0000, ram_addr);
/* Allocate, even though we won't register, so we don't break the
* phys_ram_base + PA assumption. This range includes vga (0xa0000 - 0xc0000),
* and some bios areas, which will be registered later
*/
ram_addr = qemu_ram_alloc(0x100000 - 0xa0000);
ram_addr = qemu_ram_alloc(below_4g_mem_size - 0x100000);
cpu_register_physical_memory(0x100000,
below_4g_mem_size - 0x100000,
ram_addr);
/* above 4giga memory allocation */
if (above_4g_mem_size > 0) {
#if TARGET_PHYS_ADDR_BITS == 32
hw_error("To much RAM for 32-bit physical address");
#else
ram_addr = qemu_ram_alloc(above_4g_mem_size);
cpu_register_physical_memory(0x100000000ULL,
above_4g_mem_size,
ram_addr);
#endif
}
/* 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_offset = qemu_ram_alloc(bios_size);
ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size));
if (ret != 0) {
bios_error:
fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", bios_name);
exit(1);
}
if (filename) {
qemu_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;
cpu_register_physical_memory(0x100000 - isa_bios_size,
isa_bios_size,
(bios_offset + bios_size - isa_bios_size) | IO_MEM_ROM);
rom_enable_driver_roms = 1;
option_rom_offset = qemu_ram_alloc(PC_ROM_SIZE);
cpu_register_physical_memory(PC_ROM_MIN_VGA, PC_ROM_SIZE, option_rom_offset);
/* map all the bios at the top of memory */
cpu_register_physical_memory((uint32_t)(-bios_size),
bios_size, bios_offset | IO_MEM_ROM);
fw_cfg = bochs_bios_init();
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]);
}
cpu_irq = qemu_allocate_irqs(pic_irq_request, NULL, 1);
i8259 = i8259_init(cpu_irq[0]);
isa_irq_state = qemu_mallocz(sizeof(*isa_irq_state));
isa_irq_state->i8259 = i8259;
isa_irq = qemu_allocate_irqs(isa_irq_handler, isa_irq_state, 24);
if (pci_enabled) {
pci_bus = i440fx_init(&i440fx_state, &piix3_devfn, isa_irq);
} else {
pci_bus = NULL;
isa_bus_new(NULL);
}
isa_bus_irqs(isa_irq);
ferr_irq = isa_reserve_irq(13);
/* init basic PC hardware */
register_ioport_write(0x80, 1, 1, ioport80_write, NULL);
register_ioport_write(0xf0, 1, 1, ioportF0_write, NULL);
if (cirrus_vga_enabled) {
if (pci_enabled) {
pci_cirrus_vga_init(pci_bus);
} else {
isa_cirrus_vga_init();
}
} else if (vmsvga_enabled) {
if (pci_enabled)
pci_vmsvga_init(pci_bus);
else
fprintf(stderr, "%s: vmware_vga: no PCI bus\n", __FUNCTION__);
} else if (std_vga_enabled) {
if (pci_enabled) {
pci_vga_init(pci_bus, 0, 0);
} else {
isa_vga_init();
}
}
rtc_state = rtc_init(2000);
qemu_register_boot_set(pc_boot_set, rtc_state);
register_ioport_read(0x92, 1, 1, ioport92_read, NULL);
register_ioport_write(0x92, 1, 1, ioport92_write, NULL);
if (pci_enabled) {
isa_irq_state->ioapic = ioapic_init();
}
pit = pit_init(0x40, isa_reserve_irq(0));
pcspk_init(pit);
if (!no_hpet) {
hpet_init(isa_irq);
}
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]);
}
}
for(i = 0; i < nb_nics; i++) {
NICInfo *nd = &nd_table[i];
if (!pci_enabled || (nd->model && strcmp(nd->model, "ne2k_isa") == 0))
pc_init_ne2k_isa(nd);
else
pci_nic_init_nofail(nd, "e1000", NULL);
}
if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
fprintf(stderr, "qemu: too many IDE bus\n");
exit(1);
}
for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
hd[i] = drive_get(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
}
if (pci_enabled) {
pci_piix3_ide_init(pci_bus, hd, piix3_devfn + 1);
} else {
for(i = 0; i < MAX_IDE_BUS; i++) {
isa_ide_init(ide_iobase[i], ide_iobase2[i], ide_irq[i],
hd[MAX_IDE_DEVS * i], hd[MAX_IDE_DEVS * i + 1]);
}
}
isa_dev = isa_create_simple("i8042");
DMA_init(0);
#ifdef HAS_AUDIO
audio_init(pci_enabled ? pci_bus : NULL, isa_irq);
#endif
for(i = 0; i < MAX_FD; i++) {
fd[i] = drive_get(IF_FLOPPY, 0, i);
}
floppy_controller = fdctrl_init_isa(fd);
cmos_init(below_4g_mem_size, above_4g_mem_size, boot_device, hd);
if (pci_enabled && usb_enabled) {
usb_uhci_piix3_init(pci_bus, piix3_devfn + 2);
}
if (pci_enabled && acpi_enabled) {
uint8_t *eeprom_buf = qemu_mallocz(8 * 256); /* XXX: make this persistent */
i2c_bus *smbus;
/* TODO: Populate SPD eeprom data. */
smbus = piix4_pm_init(pci_bus, piix3_devfn + 3, 0xb100,
isa_reserve_irq(9));
for (i = 0; i < 8; i++) {
DeviceState *eeprom;
eeprom = qdev_create((BusState *)smbus, "smbus-eeprom");
qdev_prop_set_uint8(eeprom, "address", 0x50 + i);
qdev_prop_set_ptr(eeprom, "data", eeprom_buf + (i * 256));
qdev_init_nofail(eeprom);
}
piix4_acpi_system_hot_add_init(pci_bus);
}
if (i440fx_state) {
i440fx_init_memory_mappings(i440fx_state);
}
if (pci_enabled) {
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");
}
}
/* Add virtio console devices */
if (pci_enabled) {
for(i = 0; i < MAX_VIRTIO_CONSOLES; i++) {
if (virtcon_hds[i]) {
pci_create_simple(pci_bus, -1, "virtio-console-pci");
}
}
}
}
static void pc_init_pci(ram_addr_t ram_size,
const char *boot_device,
const char *kernel_filename,
const char *kernel_cmdline,
const char *initrd_filename,
const char *cpu_model)
{
pc_init1(ram_size, boot_device,
kernel_filename, kernel_cmdline,
initrd_filename, cpu_model, 1);
}
static void pc_init_isa(ram_addr_t ram_size,
const char *boot_device,
const char *kernel_filename,
const char *kernel_cmdline,
const char *initrd_filename,
const char *cpu_model)
{
if (cpu_model == NULL)
cpu_model = "486";
pc_init1(ram_size, boot_device,
kernel_filename, kernel_cmdline,
initrd_filename, cpu_model, 0);
}
/* set CMOS shutdown status register (index 0xF) as S3_resume(0xFE)
BIOS will read it and start S3 resume at POST Entry */
void cmos_set_s3_resume(void)
{
if (rtc_state)
rtc_set_memory(rtc_state, 0xF, 0xFE);
}
static QEMUMachine pc_machine = {
.name = "pc-0.11",
.alias = "pc",
.desc = "Standard PC",
.init = pc_init_pci,
.max_cpus = 255,
.is_default = 1,
};
static QEMUMachine pc_machine_v0_10 = {
.name = "pc-0.10",
.desc = "Standard PC, qemu 0.10",
.init = pc_init_pci,
.max_cpus = 255,
.compat_props = (CompatProperty[]) {
{
.driver = "virtio-blk-pci",
.property = "class",
.value = stringify(PCI_CLASS_STORAGE_OTHER),
},{
.driver = "virtio-console-pci",
.property = "class",
.value = stringify(PCI_CLASS_DISPLAY_OTHER),
},{
.driver = "virtio-net-pci",
.property = "vectors",
.value = stringify(0),
},{
.driver = "virtio-blk-pci",
.property = "vectors",
.value = stringify(0),
},
{ /* end of list */ }
},
};
static QEMUMachine isapc_machine = {
.name = "isapc",
.desc = "ISA-only PC",
.init = pc_init_isa,
.max_cpus = 1,
};
static void pc_machine_init(void)
{
qemu_register_machine(&pc_machine);
qemu_register_machine(&pc_machine_v0_10);
qemu_register_machine(&isapc_machine);
}
machine_init(pc_machine_init);
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