diff options
Diffstat (limited to 'hw/s390x/ipl.c')
| -rw-r--r-- | hw/s390x/ipl.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c new file mode 100644 index 0000000000..7cbbf99fde --- /dev/null +++ b/hw/s390x/ipl.c @@ -0,0 +1,174 @@ +/* + * 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 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) |