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/*
* bootloader support
*
* Copyright IBM, Corp. 2012
*
* Authors:
* Christian Borntraeger <borntraeger@de.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or (at your
* option) any later version. See the COPYING file in the top-level directory.
*
*/
#include "sysemu/sysemu.h"
#include "cpu.h"
#include "elf.h"
#include "hw/loader.h"
#include "hw/sysbus.h"
#include "hw/s390x/virtio-ccw.h"
#include "hw/s390x/css.h"
#define KERN_IMAGE_START 0x010000UL
#define KERN_PARM_AREA 0x010480UL
#define INITRD_START 0x800000UL
#define INITRD_PARM_START 0x010408UL
#define INITRD_PARM_SIZE 0x010410UL
#define PARMFILE_START 0x001000UL
#define ZIPL_IMAGE_START 0x009000UL
#define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64)
#define TYPE_S390_IPL "s390-ipl"
#define S390_IPL(obj) \
OBJECT_CHECK(S390IPLState, (obj), TYPE_S390_IPL)
#if 0
#define S390_IPL_CLASS(klass) \
OBJECT_CLASS_CHECK(S390IPLState, (klass), TYPE_S390_IPL)
#define S390_IPL_GET_CLASS(obj) \
OBJECT_GET_CLASS(S390IPLState, (obj), TYPE_S390_IPL)
#endif
typedef struct S390IPLClass {
/*< private >*/
SysBusDeviceClass parent_class;
/*< public >*/
void (*parent_reset) (SysBusDevice *dev);
} S390IPLClass;
typedef struct S390IPLState {
/*< private >*/
SysBusDevice parent_obj;
uint64_t start_addr;
uint64_t bios_start_addr;
bool enforce_bios;
/*< public >*/
char *kernel;
char *initrd;
char *cmdline;
char *firmware;
} S390IPLState;
static int s390_ipl_init(SysBusDevice *dev)
{
S390IPLState *ipl = S390_IPL(dev);
uint64_t pentry = KERN_IMAGE_START;
int kernel_size;
int bios_size;
char *bios_filename;
/*
* Always load the bios if it was enforced,
* even if an external kernel has been defined.
*/
if (!ipl->kernel || ipl->enforce_bios) {
if (bios_name == NULL) {
bios_name = ipl->firmware;
}
bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
if (bios_filename == NULL) {
hw_error("could not find stage1 bootloader\n");
}
bios_size = load_elf(bios_filename, NULL, NULL, &ipl->bios_start_addr,
NULL, NULL, 1, ELF_MACHINE, 0);
if (bios_size < 0) {
bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
4096);
ipl->bios_start_addr = ZIPL_IMAGE_START;
if (bios_size > 4096) {
hw_error("stage1 bootloader is > 4k\n");
}
}
g_free(bios_filename);
if (bios_size == -1) {
hw_error("could not load bootloader '%s'\n", bios_name);
}
/* default boot target is the bios */
ipl->start_addr = ipl->bios_start_addr;
}
if (ipl->kernel) {
kernel_size = load_elf(ipl->kernel, NULL, NULL, &pentry, NULL,
NULL, 1, ELF_MACHINE, 0);
if (kernel_size < 0) {
kernel_size = load_image_targphys(ipl->kernel, 0, ram_size);
}
if (kernel_size < 0) {
fprintf(stderr, "could not load kernel '%s'\n", ipl->kernel);
return -1;
}
/*
* Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
* kernel parameters here as well. Note: For old kernels (up to 3.2)
* we can not rely on the ELF entry point - it was 0x800 (the SALIPL
* loader) and it won't work. For this case we force it to 0x10000, too.
*/
if (pentry == KERN_IMAGE_START || pentry == 0x800) {
ipl->start_addr = KERN_IMAGE_START;
/* Overwrite parameters in the kernel image, which are "rom" */
strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline);
} else {
ipl->start_addr = pentry;
}
if (ipl->initrd) {
ram_addr_t initrd_offset;
int initrd_size;
initrd_offset = INITRD_START;
while (kernel_size + 0x100000 > initrd_offset) {
initrd_offset += 0x100000;
}
initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
ram_size - initrd_offset);
if (initrd_size == -1) {
fprintf(stderr, "qemu: could not load initrd '%s'\n",
ipl->initrd);
exit(1);
}
/*
* we have to overwrite values in the kernel image,
* which are "rom"
*/
stq_p(rom_ptr(INITRD_PARM_START), initrd_offset);
stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size);
}
}
return 0;
}
static Property s390_ipl_properties[] = {
DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
DEFINE_PROP_END_OF_LIST(),
};
static void s390_ipl_reset(DeviceState *dev)
{
S390IPLState *ipl = S390_IPL(dev);
S390CPU *cpu = S390_CPU(qemu_get_cpu(0));
CPUS390XState *env = &cpu->env;
env->psw.addr = ipl->start_addr;
env->psw.mask = IPL_PSW_MASK;
if (!ipl->kernel) {
/* Tell firmware, if there is a preferred boot device */
env->regs[7] = -1;
DeviceState *dev_st = get_boot_device(0);
if (dev_st) {
VirtioCcwDevice *ccw_dev = (VirtioCcwDevice *) object_dynamic_cast(
OBJECT(qdev_get_parent_bus(dev_st)->parent),
TYPE_VIRTIO_CCW_DEVICE);
if (ccw_dev) {
env->regs[7] = ccw_dev->sch->cssid << 24 |
ccw_dev->sch->ssid << 16 |
ccw_dev->sch->devno;
}
}
}
s390_cpu_set_state(CPU_STATE_OPERATING, cpu);
}
static void s390_ipl_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = s390_ipl_init;
dc->props = s390_ipl_properties;
dc->reset = s390_ipl_reset;
}
static const TypeInfo s390_ipl_info = {
.class_init = s390_ipl_class_init,
.parent = TYPE_SYS_BUS_DEVICE,
.name = "s390-ipl",
.instance_size = sizeof(S390IPLState),
};
static void s390_ipl_register_types(void)
{
type_register_static(&s390_ipl_info);
}
type_init(s390_ipl_register_types)
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