2012-12-18 08:50:57 +01:00
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/*
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* bootloader support
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*
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* Copyright IBM, Corp. 2012
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*
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* Authors:
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* Christian Borntraeger <borntraeger@de.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at your
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* option) any later version. See the COPYING file in the top-level directory.
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*
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*/
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#include "sysemu/sysemu.h"
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#include "cpu.h"
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#include "elf.h"
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#include "hw/loader.h"
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#include "hw/sysbus.h"
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2013-04-30 09:15:57 +02:00
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#include "hw/s390x/virtio-ccw.h"
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#include "hw/s390x/css.h"
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2012-12-18 08:50:57 +01:00
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#define KERN_IMAGE_START 0x010000UL
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#define KERN_PARM_AREA 0x010480UL
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#define INITRD_START 0x800000UL
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#define INITRD_PARM_START 0x010408UL
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#define INITRD_PARM_SIZE 0x010410UL
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#define PARMFILE_START 0x001000UL
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#define ZIPL_IMAGE_START 0x009000UL
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#define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64)
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#define TYPE_S390_IPL "s390-ipl"
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#define S390_IPL(obj) \
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OBJECT_CHECK(S390IPLState, (obj), TYPE_S390_IPL)
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#if 0
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#define S390_IPL_CLASS(klass) \
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OBJECT_CLASS_CHECK(S390IPLState, (klass), TYPE_S390_IPL)
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#define S390_IPL_GET_CLASS(obj) \
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OBJECT_GET_CLASS(S390IPLState, (obj), TYPE_S390_IPL)
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#endif
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typedef struct S390IPLClass {
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/*< private >*/
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SysBusDeviceClass parent_class;
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/*< public >*/
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void (*parent_reset) (SysBusDevice *dev);
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} S390IPLClass;
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typedef struct S390IPLState {
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/*< private >*/
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SysBusDevice parent_obj;
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2013-04-22 16:44:39 +02:00
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uint64_t start_addr;
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2012-12-18 08:50:57 +01:00
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2013-04-22 16:44:39 +02:00
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/*< public >*/
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2012-12-18 08:50:57 +01:00
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char *kernel;
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char *initrd;
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char *cmdline;
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2013-04-22 16:52:53 +02:00
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char *firmware;
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2012-12-18 08:50:57 +01:00
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} S390IPLState;
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static int s390_ipl_init(SysBusDevice *dev)
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{
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S390IPLState *ipl = S390_IPL(dev);
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2013-11-21 14:34:26 +01:00
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int kernel_size;
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2012-12-18 08:50:57 +01:00
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if (!ipl->kernel) {
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2013-11-21 14:34:26 +01:00
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int bios_size;
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2012-12-18 08:50:57 +01:00
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char *bios_filename;
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/* Load zipl bootloader */
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if (bios_name == NULL) {
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2013-04-22 16:52:53 +02:00
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bios_name = ipl->firmware;
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2012-12-18 08:50:57 +01:00
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}
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bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
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2013-04-29 06:52:05 +02:00
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if (bios_filename == NULL) {
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hw_error("could not find stage1 bootloader\n");
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}
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2013-04-22 16:47:32 +02:00
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bios_size = load_elf(bios_filename, NULL, NULL, &ipl->start_addr, NULL,
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NULL, 1, ELF_MACHINE, 0);
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2013-11-21 14:34:26 +01:00
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if (bios_size == -1) {
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2013-04-22 16:47:32 +02:00
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bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
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4096);
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ipl->start_addr = ZIPL_IMAGE_START;
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if (bios_size > 4096) {
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hw_error("stage1 bootloader is > 4k\n");
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}
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}
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2012-12-18 08:50:57 +01:00
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g_free(bios_filename);
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2013-11-21 14:34:26 +01:00
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if (bios_size == -1) {
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2012-12-18 08:50:57 +01:00
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hw_error("could not load bootloader '%s'\n", bios_name);
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}
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return 0;
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} else {
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kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL, NULL,
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NULL, 1, ELF_MACHINE, 0);
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2013-11-21 14:34:26 +01:00
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if (kernel_size == -1) {
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2012-12-18 08:50:57 +01:00
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kernel_size = load_image_targphys(ipl->kernel, 0, ram_size);
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}
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2013-11-21 14:34:26 +01:00
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if (kernel_size == -1) {
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2012-12-18 08:50:57 +01:00
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fprintf(stderr, "could not load kernel '%s'\n", ipl->kernel);
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return -1;
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}
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/* we have to overwrite values in the kernel image, which are "rom" */
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strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline);
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2013-04-22 16:44:39 +02:00
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/*
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* we can not rely on the ELF entry point, since up to 3.2 this
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* value was 0x800 (the SALIPL loader) and it wont work. For
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* all (Linux) cases 0x10000 (KERN_IMAGE_START) should be fine.
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*/
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ipl->start_addr = KERN_IMAGE_START;
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2012-12-18 08:50:57 +01:00
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}
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if (ipl->initrd) {
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2013-11-21 14:34:26 +01:00
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ram_addr_t initrd_offset;
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int initrd_size;
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2012-12-18 08:50:57 +01:00
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initrd_offset = INITRD_START;
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while (kernel_size + 0x100000 > initrd_offset) {
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initrd_offset += 0x100000;
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}
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initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
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ram_size - initrd_offset);
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2013-11-21 14:34:26 +01:00
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if (initrd_size == -1) {
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2012-12-18 08:50:57 +01:00
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fprintf(stderr, "qemu: could not load initrd '%s'\n", ipl->initrd);
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exit(1);
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}
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/* we have to overwrite values in the kernel image, which are "rom" */
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stq_p(rom_ptr(INITRD_PARM_START), initrd_offset);
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stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size);
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}
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return 0;
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}
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static Property s390_ipl_properties[] = {
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DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
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DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
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DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
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2013-04-22 16:52:53 +02:00
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DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
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2012-12-18 08:50:57 +01:00
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DEFINE_PROP_END_OF_LIST(),
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};
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static void s390_ipl_reset(DeviceState *dev)
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{
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S390IPLState *ipl = S390_IPL(dev);
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2013-04-30 09:15:56 +02:00
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S390CPU *cpu = S390_CPU(qemu_get_cpu(0));
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CPUS390XState *env = &cpu->env;
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2012-12-18 08:50:57 +01:00
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2013-04-30 09:15:56 +02:00
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env->psw.addr = ipl->start_addr;
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env->psw.mask = IPL_PSW_MASK;
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2013-04-30 09:15:57 +02:00
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if (!ipl->kernel) {
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2013-06-18 14:31:52 +02:00
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/* Tell firmware, if there is a preferred boot device */
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env->regs[7] = -1;
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2013-04-30 09:15:57 +02:00
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DeviceState *dev_st = get_boot_device(0);
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2013-06-18 14:31:52 +02:00
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if (dev_st) {
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VirtioCcwDevice *ccw_dev = (VirtioCcwDevice *) object_dynamic_cast(
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OBJECT(qdev_get_parent_bus(dev_st)->parent),
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TYPE_VIRTIO_CCW_DEVICE);
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if (ccw_dev) {
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env->regs[7] = ccw_dev->sch->cssid << 24 |
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ccw_dev->sch->ssid << 16 |
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ccw_dev->sch->devno;
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}
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2013-04-30 09:15:57 +02:00
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}
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}
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2013-04-30 09:15:56 +02:00
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s390_add_running_cpu(cpu);
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2012-12-18 08:50:57 +01:00
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}
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static void s390_ipl_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
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k->init = s390_ipl_init;
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dc->props = s390_ipl_properties;
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dc->reset = s390_ipl_reset;
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dc->no_user = 1;
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}
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2013-01-24 19:11:26 +01:00
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static const TypeInfo s390_ipl_info = {
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2012-12-18 08:50:57 +01:00
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.class_init = s390_ipl_class_init,
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.parent = TYPE_SYS_BUS_DEVICE,
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.name = "s390-ipl",
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.instance_size = sizeof(S390IPLState),
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};
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static void s390_ipl_register_types(void)
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{
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type_register_static(&s390_ipl_info);
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}
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type_init(s390_ipl_register_types)
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