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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"
#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_FILENAME "s390-zipl.rom"
#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;
/*< public >*/
char *kernel;
char *initrd;
char *cmdline;
} S390IPLState;
static void s390_ipl_cpu(uint64_t pswaddr)
{
CPUS390XState *env = &S390_CPU(qemu_get_cpu(0))->env;
env->psw.addr = pswaddr;
env->psw.mask = IPL_PSW_MASK;
s390_add_running_cpu(env);
}
static int s390_ipl_init(SysBusDevice *dev)
{
S390IPLState *ipl = S390_IPL(dev);
ram_addr_t kernel_size = 0;
if (!ipl->kernel) {
ram_addr_t bios_size = 0;
char *bios_filename;
/* Load zipl bootloader */
if (bios_name == NULL) {
bios_name = ZIPL_FILENAME;
}
bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, 4096);
g_free(bios_filename);
if ((long)bios_size < 0) {
hw_error("could not load bootloader '%s'\n", bios_name);
}
if (bios_size > 4096) {
hw_error("stage1 bootloader is > 4k\n");
}
return 0;
} else {
kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL, NULL,
NULL, 1, ELF_MACHINE, 0);
if (kernel_size == -1UL) {
kernel_size = load_image_targphys(ipl->kernel, 0, ram_size);
}
if (kernel_size == -1UL) {
fprintf(stderr, "could not load kernel '%s'\n", ipl->kernel);
return -1;
}
/* we have to overwrite values in the kernel image, which are "rom" */
strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline);
}
if (ipl->initrd) {
ram_addr_t initrd_offset, 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 == -1UL) {
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_END_OF_LIST(),
};
static void s390_ipl_reset(DeviceState *dev)
{
S390IPLState *ipl = S390_IPL(dev);
if (ipl->kernel) {
/*
* we can not rely on the ELF entry point, since up to 3.2 this
* value was 0x800 (the SALIPL loader) and it wont work. For
* all (Linux) cases 0x10000 (KERN_IMAGE_START) should be fine.
*/
return s390_ipl_cpu(KERN_IMAGE_START);
} else {
return s390_ipl_cpu(ZIPL_IMAGE_START);
}
}
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;
dc->no_user = 1;
}
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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