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e674a49a CB |
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" | |
ba1509c0 DD |
19 | #include "hw/s390x/virtio-ccw.h" |
20 | #include "hw/s390x/css.h" | |
e674a49a CB |
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 | |
e674a49a CB |
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; | |
74ad2d22 | 52 | uint64_t start_addr; |
e674a49a | 53 | |
74ad2d22 | 54 | /*< public >*/ |
e674a49a CB |
55 | char *kernel; |
56 | char *initrd; | |
57 | char *cmdline; | |
d0249ce5 | 58 | char *firmware; |
e674a49a CB |
59 | } S390IPLState; |
60 | ||
61 | ||
e674a49a CB |
62 | static int s390_ipl_init(SysBusDevice *dev) |
63 | { | |
64 | S390IPLState *ipl = S390_IPL(dev); | |
65 | ram_addr_t kernel_size = 0; | |
66 | ||
67 | if (!ipl->kernel) { | |
68 | ram_addr_t bios_size = 0; | |
69 | char *bios_filename; | |
70 | ||
71 | /* Load zipl bootloader */ | |
72 | if (bios_name == NULL) { | |
d0249ce5 | 73 | bios_name = ipl->firmware; |
e674a49a CB |
74 | } |
75 | ||
76 | bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); | |
1f7de853 DD |
77 | if (bios_filename == NULL) { |
78 | hw_error("could not find stage1 bootloader\n"); | |
79 | } | |
80 | ||
33259956 AG |
81 | bios_size = load_elf(bios_filename, NULL, NULL, &ipl->start_addr, NULL, |
82 | NULL, 1, ELF_MACHINE, 0); | |
83 | if (bios_size == -1UL) { | |
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 | } | |
e674a49a CB |
91 | g_free(bios_filename); |
92 | ||
93 | if ((long)bios_size < 0) { | |
94 | hw_error("could not load bootloader '%s'\n", bios_name); | |
95 | } | |
e674a49a CB |
96 | return 0; |
97 | } else { | |
98 | kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL, NULL, | |
99 | NULL, 1, ELF_MACHINE, 0); | |
100 | if (kernel_size == -1UL) { | |
101 | kernel_size = load_image_targphys(ipl->kernel, 0, ram_size); | |
102 | } | |
103 | if (kernel_size == -1UL) { | |
104 | fprintf(stderr, "could not load kernel '%s'\n", ipl->kernel); | |
105 | return -1; | |
106 | } | |
107 | /* we have to overwrite values in the kernel image, which are "rom" */ | |
108 | strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline); | |
74ad2d22 AG |
109 | |
110 | /* | |
111 | * we can not rely on the ELF entry point, since up to 3.2 this | |
112 | * value was 0x800 (the SALIPL loader) and it wont work. For | |
113 | * all (Linux) cases 0x10000 (KERN_IMAGE_START) should be fine. | |
114 | */ | |
115 | ipl->start_addr = KERN_IMAGE_START; | |
e674a49a CB |
116 | } |
117 | if (ipl->initrd) { | |
118 | ram_addr_t initrd_offset, initrd_size; | |
119 | ||
120 | initrd_offset = INITRD_START; | |
121 | while (kernel_size + 0x100000 > initrd_offset) { | |
122 | initrd_offset += 0x100000; | |
123 | } | |
124 | initrd_size = load_image_targphys(ipl->initrd, initrd_offset, | |
125 | ram_size - initrd_offset); | |
126 | if (initrd_size == -1UL) { | |
127 | fprintf(stderr, "qemu: could not load initrd '%s'\n", ipl->initrd); | |
128 | exit(1); | |
129 | } | |
130 | ||
131 | /* we have to overwrite values in the kernel image, which are "rom" */ | |
132 | stq_p(rom_ptr(INITRD_PARM_START), initrd_offset); | |
133 | stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size); | |
134 | } | |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
139 | static Property s390_ipl_properties[] = { | |
140 | DEFINE_PROP_STRING("kernel", S390IPLState, kernel), | |
141 | DEFINE_PROP_STRING("initrd", S390IPLState, initrd), | |
142 | DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), | |
d0249ce5 | 143 | DEFINE_PROP_STRING("firmware", S390IPLState, firmware), |
e674a49a CB |
144 | DEFINE_PROP_END_OF_LIST(), |
145 | }; | |
146 | ||
147 | static void s390_ipl_reset(DeviceState *dev) | |
148 | { | |
149 | S390IPLState *ipl = S390_IPL(dev); | |
2c4c71ee DD |
150 | S390CPU *cpu = S390_CPU(qemu_get_cpu(0)); |
151 | CPUS390XState *env = &cpu->env; | |
e674a49a | 152 | |
2c4c71ee DD |
153 | env->psw.addr = ipl->start_addr; |
154 | env->psw.mask = IPL_PSW_MASK; | |
ba1509c0 DD |
155 | |
156 | if (!ipl->kernel) { | |
5c8ded6e CB |
157 | /* Tell firmware, if there is a preferred boot device */ |
158 | env->regs[7] = -1; | |
ba1509c0 | 159 | DeviceState *dev_st = get_boot_device(0); |
5c8ded6e CB |
160 | if (dev_st) { |
161 | VirtioCcwDevice *ccw_dev = (VirtioCcwDevice *) object_dynamic_cast( | |
162 | OBJECT(qdev_get_parent_bus(dev_st)->parent), | |
163 | TYPE_VIRTIO_CCW_DEVICE); | |
164 | ||
165 | if (ccw_dev) { | |
166 | env->regs[7] = ccw_dev->sch->cssid << 24 | | |
167 | ccw_dev->sch->ssid << 16 | | |
168 | ccw_dev->sch->devno; | |
169 | } | |
ba1509c0 DD |
170 | } |
171 | } | |
172 | ||
2c4c71ee | 173 | s390_add_running_cpu(cpu); |
e674a49a CB |
174 | } |
175 | ||
176 | static void s390_ipl_class_init(ObjectClass *klass, void *data) | |
177 | { | |
178 | DeviceClass *dc = DEVICE_CLASS(klass); | |
179 | SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); | |
180 | ||
181 | k->init = s390_ipl_init; | |
182 | dc->props = s390_ipl_properties; | |
183 | dc->reset = s390_ipl_reset; | |
184 | dc->no_user = 1; | |
185 | } | |
186 | ||
49973ebc | 187 | static const TypeInfo s390_ipl_info = { |
e674a49a CB |
188 | .class_init = s390_ipl_class_init, |
189 | .parent = TYPE_SYS_BUS_DEVICE, | |
190 | .name = "s390-ipl", | |
191 | .instance_size = sizeof(S390IPLState), | |
192 | }; | |
193 | ||
194 | static void s390_ipl_register_types(void) | |
195 | { | |
196 | type_register_static(&s390_ipl_info); | |
197 | } | |
198 | ||
199 | type_init(s390_ipl_register_types) |