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