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