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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" | |
ba1509c0 DD |
18 | #include "hw/s390x/virtio-ccw.h" |
19 | #include "hw/s390x/css.h" | |
df75a4e2 | 20 | #include "ipl.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 | ||
2e13fbe4 FZ |
31 | static const VMStateDescription vmstate_iplb = { |
32 | .name = "ipl/iplb", | |
33 | .version_id = 0, | |
34 | .minimum_version_id = 0, | |
35 | .fields = (VMStateField[]) { | |
36 | VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110), | |
37 | VMSTATE_UINT16(devno, IplParameterBlock), | |
38 | VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88), | |
39 | VMSTATE_END_OF_LIST() | |
40 | } | |
41 | }; | |
42 | ||
43 | static const VMStateDescription vmstate_ipl = { | |
44 | .name = "ipl", | |
45 | .version_id = 0, | |
46 | .minimum_version_id = 0, | |
47 | .fields = (VMStateField[]) { | |
48 | VMSTATE_UINT64(start_addr, S390IPLState), | |
49 | VMSTATE_UINT64(bios_start_addr, S390IPLState), | |
50 | VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock), | |
51 | VMSTATE_BOOL(iplb_valid, S390IPLState), | |
52 | VMSTATE_UINT8(cssid, S390IPLState), | |
53 | VMSTATE_UINT8(ssid, S390IPLState), | |
54 | VMSTATE_UINT16(devno, S390IPLState), | |
55 | VMSTATE_END_OF_LIST() | |
56 | } | |
57 | }; | |
e674a49a | 58 | |
feacc6c2 DH |
59 | static S390IPLState *get_ipl_device(void) |
60 | { | |
61 | return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL)); | |
62 | } | |
63 | ||
d884c86d TH |
64 | static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr) |
65 | { | |
66 | uint64_t dstaddr = *(uint64_t *) opaque; | |
67 | /* | |
68 | * Assuming that our s390-ccw.img was linked for starting at address 0, | |
69 | * we can simply add the destination address for the final location | |
70 | */ | |
71 | return srcaddr + dstaddr; | |
72 | } | |
73 | ||
04fccf10 | 74 | static void s390_ipl_realize(DeviceState *dev, Error **errp) |
e674a49a CB |
75 | { |
76 | S390IPLState *ipl = S390_IPL(dev); | |
7691993c | 77 | uint64_t pentry = KERN_IMAGE_START; |
376827d4 | 78 | int kernel_size; |
8f04e88e | 79 | Error *l_err = NULL; |
e674a49a | 80 | |
f0180f91 FZ |
81 | int bios_size; |
82 | char *bios_filename; | |
e674a49a | 83 | |
f0180f91 FZ |
84 | /* |
85 | * Always load the bios if it was enforced, | |
86 | * even if an external kernel has been defined. | |
87 | */ | |
88 | if (!ipl->kernel || ipl->enforce_bios) { | |
d884c86d TH |
89 | uint64_t fwbase = (MIN(ram_size, 0x80000000U) - 0x200000) & ~0xffffUL; |
90 | ||
e674a49a | 91 | if (bios_name == NULL) { |
d0249ce5 | 92 | bios_name = ipl->firmware; |
e674a49a CB |
93 | } |
94 | ||
95 | bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); | |
1f7de853 | 96 | if (bios_filename == NULL) { |
9af9e0fe | 97 | error_setg(&l_err, "could not find stage1 bootloader"); |
8f04e88e | 98 | goto error; |
1f7de853 DD |
99 | } |
100 | ||
d884c86d TH |
101 | bios_size = load_elf(bios_filename, bios_translate_addr, &fwbase, |
102 | &ipl->bios_start_addr, NULL, NULL, 1, | |
99a4434e | 103 | EM_S390, 0); |
d884c86d TH |
104 | if (bios_size > 0) { |
105 | /* Adjust ELF start address to final location */ | |
106 | ipl->bios_start_addr += fwbase; | |
107 | } else { | |
108 | /* Try to load non-ELF file (e.g. s390-zipl.rom) */ | |
33259956 AG |
109 | bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, |
110 | 4096); | |
f0180f91 | 111 | ipl->bios_start_addr = ZIPL_IMAGE_START; |
33259956 | 112 | } |
e674a49a CB |
113 | g_free(bios_filename); |
114 | ||
376827d4 | 115 | if (bios_size == -1) { |
9af9e0fe | 116 | error_setg(&l_err, "could not load bootloader '%s'", bios_name); |
8f04e88e | 117 | goto error; |
e674a49a | 118 | } |
7691993c | 119 | |
f0180f91 FZ |
120 | /* default boot target is the bios */ |
121 | ipl->start_addr = ipl->bios_start_addr; | |
e674a49a | 122 | } |
7691993c | 123 | |
f0180f91 FZ |
124 | if (ipl->kernel) { |
125 | kernel_size = load_elf(ipl->kernel, NULL, NULL, &pentry, NULL, | |
99a4434e | 126 | NULL, 1, EM_S390, 0); |
f0180f91 FZ |
127 | if (kernel_size < 0) { |
128 | kernel_size = load_image_targphys(ipl->kernel, 0, ram_size); | |
129 | } | |
130 | if (kernel_size < 0) { | |
9af9e0fe | 131 | error_setg(&l_err, "could not load kernel '%s'", ipl->kernel); |
8f04e88e | 132 | goto error; |
e674a49a | 133 | } |
f0180f91 FZ |
134 | /* |
135 | * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the | |
136 | * kernel parameters here as well. Note: For old kernels (up to 3.2) | |
137 | * we can not rely on the ELF entry point - it was 0x800 (the SALIPL | |
138 | * loader) and it won't work. For this case we force it to 0x10000, too. | |
139 | */ | |
140 | if (pentry == KERN_IMAGE_START || pentry == 0x800) { | |
141 | ipl->start_addr = KERN_IMAGE_START; | |
142 | /* Overwrite parameters in the kernel image, which are "rom" */ | |
143 | strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline); | |
144 | } else { | |
145 | ipl->start_addr = pentry; | |
e674a49a CB |
146 | } |
147 | ||
f0180f91 FZ |
148 | if (ipl->initrd) { |
149 | ram_addr_t initrd_offset; | |
150 | int initrd_size; | |
151 | ||
152 | initrd_offset = INITRD_START; | |
153 | while (kernel_size + 0x100000 > initrd_offset) { | |
154 | initrd_offset += 0x100000; | |
155 | } | |
156 | initrd_size = load_image_targphys(ipl->initrd, initrd_offset, | |
157 | ram_size - initrd_offset); | |
158 | if (initrd_size == -1) { | |
9af9e0fe | 159 | error_setg(&l_err, "could not load initrd '%s'", ipl->initrd); |
8f04e88e | 160 | goto error; |
f0180f91 | 161 | } |
e674a49a | 162 | |
f0180f91 FZ |
163 | /* |
164 | * we have to overwrite values in the kernel image, | |
165 | * which are "rom" | |
166 | */ | |
167 | stq_p(rom_ptr(INITRD_PARM_START), initrd_offset); | |
168 | stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size); | |
169 | } | |
170 | } | |
04fccf10 | 171 | qemu_register_reset(qdev_reset_all_fn, dev); |
8f04e88e DH |
172 | error: |
173 | error_propagate(errp, l_err); | |
e674a49a CB |
174 | } |
175 | ||
176 | static Property s390_ipl_properties[] = { | |
177 | DEFINE_PROP_STRING("kernel", S390IPLState, kernel), | |
178 | DEFINE_PROP_STRING("initrd", S390IPLState, initrd), | |
179 | DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), | |
d0249ce5 | 180 | DEFINE_PROP_STRING("firmware", S390IPLState, firmware), |
f0180f91 | 181 | DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false), |
e674a49a CB |
182 | DEFINE_PROP_END_OF_LIST(), |
183 | }; | |
184 | ||
df75a4e2 FZ |
185 | /* |
186 | * In addition to updating the iplstate, this function returns: | |
187 | * - 0 if system was ipled with external kernel | |
188 | * - -1 if no valid boot device was found | |
189 | * - ccw id of the boot device otherwise | |
190 | */ | |
db3b2566 | 191 | static uint64_t s390_update_iplstate(S390IPLState *ipl) |
df75a4e2 FZ |
192 | { |
193 | DeviceState *dev_st; | |
194 | ||
195 | if (ipl->iplb_valid) { | |
196 | ipl->cssid = 0; | |
197 | ipl->ssid = 0; | |
198 | ipl->devno = ipl->iplb.devno; | |
199 | goto out; | |
200 | } | |
201 | ||
202 | if (ipl->kernel) { | |
203 | return 0; | |
204 | } | |
205 | ||
206 | dev_st = get_boot_device(0); | |
207 | if (dev_st) { | |
208 | VirtioCcwDevice *ccw_dev = (VirtioCcwDevice *) object_dynamic_cast( | |
209 | OBJECT(qdev_get_parent_bus(dev_st)->parent), | |
210 | TYPE_VIRTIO_CCW_DEVICE); | |
211 | if (ccw_dev) { | |
212 | ipl->cssid = ccw_dev->sch->cssid; | |
213 | ipl->ssid = ccw_dev->sch->ssid; | |
214 | ipl->devno = ccw_dev->sch->devno; | |
215 | goto out; | |
216 | } | |
217 | } | |
218 | ||
219 | return -1; | |
220 | out: | |
6efd2c2a | 221 | return (uint32_t) (ipl->cssid << 24 | ipl->ssid << 16 | ipl->devno); |
df75a4e2 FZ |
222 | } |
223 | ||
feacc6c2 | 224 | void s390_ipl_update_diag308(IplParameterBlock *iplb) |
df75a4e2 | 225 | { |
feacc6c2 | 226 | S390IPLState *ipl = get_ipl_device(); |
df75a4e2 | 227 | |
feacc6c2 DH |
228 | ipl->iplb = *iplb; |
229 | ipl->iplb_valid = true; | |
df75a4e2 FZ |
230 | } |
231 | ||
232 | IplParameterBlock *s390_ipl_get_iplb(void) | |
233 | { | |
feacc6c2 | 234 | S390IPLState *ipl = get_ipl_device(); |
df75a4e2 | 235 | |
feacc6c2 | 236 | if (!ipl->iplb_valid) { |
df75a4e2 FZ |
237 | return NULL; |
238 | } | |
239 | return &ipl->iplb; | |
240 | } | |
241 | ||
e91e972c FZ |
242 | void s390_reipl_request(void) |
243 | { | |
feacc6c2 | 244 | S390IPLState *ipl = get_ipl_device(); |
e91e972c | 245 | |
e91e972c FZ |
246 | ipl->reipl_requested = true; |
247 | qemu_system_reset_request(); | |
248 | } | |
249 | ||
db3b2566 DH |
250 | void s390_ipl_prepare_cpu(S390CPU *cpu) |
251 | { | |
252 | S390IPLState *ipl = get_ipl_device(); | |
253 | ||
254 | cpu->env.psw.addr = ipl->start_addr; | |
255 | cpu->env.psw.mask = IPL_PSW_MASK; | |
256 | ||
257 | if (!ipl->kernel || ipl->iplb_valid) { | |
258 | cpu->env.psw.addr = ipl->bios_start_addr; | |
259 | cpu->env.regs[7] = s390_update_iplstate(ipl); | |
260 | } | |
261 | } | |
262 | ||
e674a49a CB |
263 | static void s390_ipl_reset(DeviceState *dev) |
264 | { | |
265 | S390IPLState *ipl = S390_IPL(dev); | |
ba1509c0 | 266 | |
e91e972c FZ |
267 | if (!ipl->reipl_requested) { |
268 | ipl->iplb_valid = false; | |
269 | } | |
270 | ipl->reipl_requested = false; | |
e674a49a CB |
271 | } |
272 | ||
273 | static void s390_ipl_class_init(ObjectClass *klass, void *data) | |
274 | { | |
275 | DeviceClass *dc = DEVICE_CLASS(klass); | |
e674a49a | 276 | |
04fccf10 | 277 | dc->realize = s390_ipl_realize; |
e674a49a CB |
278 | dc->props = s390_ipl_properties; |
279 | dc->reset = s390_ipl_reset; | |
2e13fbe4 | 280 | dc->vmsd = &vmstate_ipl; |
b4ab4572 | 281 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
e674a49a CB |
282 | } |
283 | ||
49973ebc | 284 | static const TypeInfo s390_ipl_info = { |
e674a49a | 285 | .class_init = s390_ipl_class_init, |
04fccf10 DH |
286 | .parent = TYPE_DEVICE, |
287 | .name = TYPE_S390_IPL, | |
e674a49a CB |
288 | .instance_size = sizeof(S390IPLState), |
289 | }; | |
290 | ||
291 | static void s390_ipl_register_types(void) | |
292 | { | |
293 | type_register_static(&s390_ipl_info); | |
294 | } | |
295 | ||
296 | type_init(s390_ipl_register_types) |