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 20 #define KERN_IMAGE_START 0x010000UL 21 #define KERN_PARM_AREA 0x010480UL 22 #define INITRD_START 0x800000UL 23 #define INITRD_PARM_START 0x010408UL 24 #define INITRD_PARM_SIZE 0x010410UL 25 #define PARMFILE_START 0x001000UL 26 #define ZIPL_IMAGE_START 0x009000UL 27 #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64) 28 29 #define TYPE_S390_IPL "s390-ipl" 30 #define S390_IPL(obj) \ 31 OBJECT_CHECK(S390IPLState, (obj), TYPE_S390_IPL) 32 #if 0 33 #define S390_IPL_CLASS(klass) \ 34 OBJECT_CLASS_CHECK(S390IPLState, (klass), TYPE_S390_IPL) 35 #define S390_IPL_GET_CLASS(obj) \ 36 OBJECT_GET_CLASS(S390IPLState, (obj), TYPE_S390_IPL) 37 #endif 38 39 typedef struct S390IPLClass { 40 /*< private >*/ 41 SysBusDeviceClass parent_class; 42 /*< public >*/ 43 44 void (*parent_reset) (SysBusDevice *dev); 45 } S390IPLClass; 46 47 typedef struct S390IPLState { 48 /*< private >*/ 49 SysBusDevice parent_obj; 50 uint64_t start_addr; 51 52 /*< public >*/ 53 char *kernel; 54 char *initrd; 55 char *cmdline; 56 char *firmware; 57 } S390IPLState; 58 59 60 static void s390_ipl_cpu(uint64_t pswaddr) 61 { 62 S390CPU *cpu = S390_CPU(qemu_get_cpu(0)); 63 CPUS390XState *env = &cpu->env; 64 65 env->psw.addr = pswaddr; 66 env->psw.mask = IPL_PSW_MASK; 67 s390_add_running_cpu(cpu); 68 } 69 70 static int s390_ipl_init(SysBusDevice *dev) 71 { 72 S390IPLState *ipl = S390_IPL(dev); 73 ram_addr_t kernel_size = 0; 74 75 if (!ipl->kernel) { 76 ram_addr_t bios_size = 0; 77 char *bios_filename; 78 79 /* Load zipl bootloader */ 80 if (bios_name == NULL) { 81 bios_name = ipl->firmware; 82 } 83 84 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); 85 bios_size = load_elf(bios_filename, NULL, NULL, &ipl->start_addr, NULL, 86 NULL, 1, ELF_MACHINE, 0); 87 if (bios_size == -1UL) { 88 bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, 89 4096); 90 ipl->start_addr = ZIPL_IMAGE_START; 91 if (bios_size > 4096) { 92 hw_error("stage1 bootloader is > 4k\n"); 93 } 94 } 95 g_free(bios_filename); 96 97 if ((long)bios_size < 0) { 98 hw_error("could not load bootloader '%s'\n", bios_name); 99 } 100 return 0; 101 } else { 102 kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL, NULL, 103 NULL, 1, ELF_MACHINE, 0); 104 if (kernel_size == -1UL) { 105 kernel_size = load_image_targphys(ipl->kernel, 0, ram_size); 106 } 107 if (kernel_size == -1UL) { 108 fprintf(stderr, "could not load kernel '%s'\n", ipl->kernel); 109 return -1; 110 } 111 /* we have to overwrite values in the kernel image, which are "rom" */ 112 strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline); 113 114 /* 115 * we can not rely on the ELF entry point, since up to 3.2 this 116 * value was 0x800 (the SALIPL loader) and it wont work. For 117 * all (Linux) cases 0x10000 (KERN_IMAGE_START) should be fine. 118 */ 119 ipl->start_addr = KERN_IMAGE_START; 120 } 121 if (ipl->initrd) { 122 ram_addr_t initrd_offset, initrd_size; 123 124 initrd_offset = INITRD_START; 125 while (kernel_size + 0x100000 > initrd_offset) { 126 initrd_offset += 0x100000; 127 } 128 initrd_size = load_image_targphys(ipl->initrd, initrd_offset, 129 ram_size - initrd_offset); 130 if (initrd_size == -1UL) { 131 fprintf(stderr, "qemu: could not load initrd '%s'\n", ipl->initrd); 132 exit(1); 133 } 134 135 /* we have to overwrite values in the kernel image, which are "rom" */ 136 stq_p(rom_ptr(INITRD_PARM_START), initrd_offset); 137 stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size); 138 } 139 140 return 0; 141 } 142 143 static Property s390_ipl_properties[] = { 144 DEFINE_PROP_STRING("kernel", S390IPLState, kernel), 145 DEFINE_PROP_STRING("initrd", S390IPLState, initrd), 146 DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), 147 DEFINE_PROP_STRING("firmware", S390IPLState, firmware), 148 DEFINE_PROP_END_OF_LIST(), 149 }; 150 151 static void s390_ipl_reset(DeviceState *dev) 152 { 153 S390IPLState *ipl = S390_IPL(dev); 154 155 s390_ipl_cpu(ipl->start_addr); 156 } 157 158 static void s390_ipl_class_init(ObjectClass *klass, void *data) 159 { 160 DeviceClass *dc = DEVICE_CLASS(klass); 161 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 162 163 k->init = s390_ipl_init; 164 dc->props = s390_ipl_properties; 165 dc->reset = s390_ipl_reset; 166 dc->no_user = 1; 167 } 168 169 static const TypeInfo s390_ipl_info = { 170 .class_init = s390_ipl_class_init, 171 .parent = TYPE_SYS_BUS_DEVICE, 172 .name = "s390-ipl", 173 .instance_size = sizeof(S390IPLState), 174 }; 175 176 static void s390_ipl_register_types(void) 177 { 178 type_register_static(&s390_ipl_info); 179 } 180 181 type_init(s390_ipl_register_types) 182