1 /* 2 * bootloader support 3 * 4 * Copyright IBM, Corp. 2012 5 * 6 * Authors: 7 * Christian Borntraeger <borntraeger@de.ibm.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2 or (at your 10 * option) any later version. See the COPYING file in the top-level directory. 11 * 12 */ 13 14 #include "sysemu/sysemu.h" 15 #include "cpu.h" 16 #include "elf.h" 17 #include "hw/loader.h" 18 #include "hw/sysbus.h" 19 #include "hw/s390x/virtio-ccw.h" 20 #include "hw/s390x/css.h" 21 22 #define KERN_IMAGE_START 0x010000UL 23 #define KERN_PARM_AREA 0x010480UL 24 #define INITRD_START 0x800000UL 25 #define INITRD_PARM_START 0x010408UL 26 #define INITRD_PARM_SIZE 0x010410UL 27 #define PARMFILE_START 0x001000UL 28 #define ZIPL_IMAGE_START 0x009000UL 29 #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64) 30 31 #define TYPE_S390_IPL "s390-ipl" 32 #define S390_IPL(obj) \ 33 OBJECT_CHECK(S390IPLState, (obj), TYPE_S390_IPL) 34 #if 0 35 #define S390_IPL_CLASS(klass) \ 36 OBJECT_CLASS_CHECK(S390IPLState, (klass), TYPE_S390_IPL) 37 #define S390_IPL_GET_CLASS(obj) \ 38 OBJECT_GET_CLASS(S390IPLState, (obj), TYPE_S390_IPL) 39 #endif 40 41 typedef struct S390IPLClass { 42 /*< private >*/ 43 SysBusDeviceClass parent_class; 44 /*< public >*/ 45 46 void (*parent_reset) (SysBusDevice *dev); 47 } S390IPLClass; 48 49 typedef struct S390IPLState { 50 /*< private >*/ 51 SysBusDevice parent_obj; 52 uint64_t start_addr; 53 54 /*< public >*/ 55 char *kernel; 56 char *initrd; 57 char *cmdline; 58 char *firmware; 59 } S390IPLState; 60 61 62 static int s390_ipl_init(SysBusDevice *dev) 63 { 64 S390IPLState *ipl = S390_IPL(dev); 65 int kernel_size; 66 67 if (!ipl->kernel) { 68 int bios_size; 69 char *bios_filename; 70 71 /* Load zipl bootloader */ 72 if (bios_name == NULL) { 73 bios_name = ipl->firmware; 74 } 75 76 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); 77 if (bios_filename == NULL) { 78 hw_error("could not find stage1 bootloader\n"); 79 } 80 81 bios_size = load_elf(bios_filename, NULL, NULL, &ipl->start_addr, NULL, 82 NULL, 1, ELF_MACHINE, 0); 83 if (bios_size < 0) { 84 bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, 85 4096); 86 ipl->start_addr = ZIPL_IMAGE_START; 87 if (bios_size > 4096) { 88 hw_error("stage1 bootloader is > 4k\n"); 89 } 90 } 91 g_free(bios_filename); 92 93 if (bios_size == -1) { 94 hw_error("could not load bootloader '%s'\n", bios_name); 95 } 96 return 0; 97 } else { 98 uint64_t pentry = KERN_IMAGE_START; 99 kernel_size = load_elf(ipl->kernel, NULL, NULL, &pentry, NULL, 100 NULL, 1, ELF_MACHINE, 0); 101 if (kernel_size < 0) { 102 kernel_size = load_image_targphys(ipl->kernel, 0, ram_size); 103 } 104 if (kernel_size < 0) { 105 fprintf(stderr, "could not load kernel '%s'\n", ipl->kernel); 106 return -1; 107 } 108 /* 109 * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the 110 * kernel parameters here as well. Note: For old kernels (up to 3.2) 111 * we can not rely on the ELF entry point - it was 0x800 (the SALIPL 112 * loader) and it won't work. For this case we force it to 0x10000, too. 113 */ 114 if (pentry == KERN_IMAGE_START || pentry == 0x800) { 115 ipl->start_addr = KERN_IMAGE_START; 116 /* Overwrite parameters in the kernel image, which are "rom" */ 117 strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline); 118 } else { 119 ipl->start_addr = pentry; 120 } 121 } 122 if (ipl->initrd) { 123 ram_addr_t initrd_offset; 124 int initrd_size; 125 126 initrd_offset = INITRD_START; 127 while (kernel_size + 0x100000 > initrd_offset) { 128 initrd_offset += 0x100000; 129 } 130 initrd_size = load_image_targphys(ipl->initrd, initrd_offset, 131 ram_size - initrd_offset); 132 if (initrd_size == -1) { 133 fprintf(stderr, "qemu: could not load initrd '%s'\n", ipl->initrd); 134 exit(1); 135 } 136 137 /* we have to overwrite values in the kernel image, which are "rom" */ 138 stq_p(rom_ptr(INITRD_PARM_START), initrd_offset); 139 stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size); 140 } 141 142 return 0; 143 } 144 145 static Property s390_ipl_properties[] = { 146 DEFINE_PROP_STRING("kernel", S390IPLState, kernel), 147 DEFINE_PROP_STRING("initrd", S390IPLState, initrd), 148 DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), 149 DEFINE_PROP_STRING("firmware", S390IPLState, firmware), 150 DEFINE_PROP_END_OF_LIST(), 151 }; 152 153 static void s390_ipl_reset(DeviceState *dev) 154 { 155 S390IPLState *ipl = S390_IPL(dev); 156 S390CPU *cpu = S390_CPU(qemu_get_cpu(0)); 157 CPUS390XState *env = &cpu->env; 158 159 env->psw.addr = ipl->start_addr; 160 env->psw.mask = IPL_PSW_MASK; 161 162 if (!ipl->kernel) { 163 /* Tell firmware, if there is a preferred boot device */ 164 env->regs[7] = -1; 165 DeviceState *dev_st = get_boot_device(0); 166 if (dev_st) { 167 VirtioCcwDevice *ccw_dev = (VirtioCcwDevice *) object_dynamic_cast( 168 OBJECT(qdev_get_parent_bus(dev_st)->parent), 169 TYPE_VIRTIO_CCW_DEVICE); 170 171 if (ccw_dev) { 172 env->regs[7] = ccw_dev->sch->cssid << 24 | 173 ccw_dev->sch->ssid << 16 | 174 ccw_dev->sch->devno; 175 } 176 } 177 } 178 179 s390_add_running_cpu(cpu); 180 } 181 182 static void s390_ipl_class_init(ObjectClass *klass, void *data) 183 { 184 DeviceClass *dc = DEVICE_CLASS(klass); 185 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 186 187 k->init = s390_ipl_init; 188 dc->props = s390_ipl_properties; 189 dc->reset = s390_ipl_reset; 190 } 191 192 static const TypeInfo s390_ipl_info = { 193 .class_init = s390_ipl_class_init, 194 .parent = TYPE_SYS_BUS_DEVICE, 195 .name = "s390-ipl", 196 .instance_size = sizeof(S390IPLState), 197 }; 198 199 static void s390_ipl_register_types(void) 200 { 201 type_register_static(&s390_ipl_info); 202 } 203 204 type_init(s390_ipl_register_types) 205