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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 | ||
9615495a | 14 | #include "qemu/osdep.h" |
da34e65c | 15 | #include "qapi/error.h" |
e674a49a CB |
16 | #include "sysemu/sysemu.h" |
17 | #include "cpu.h" | |
18 | #include "elf.h" | |
19 | #include "hw/loader.h" | |
ba1509c0 DD |
20 | #include "hw/s390x/virtio-ccw.h" |
21 | #include "hw/s390x/css.h" | |
df75a4e2 | 22 | #include "ipl.h" |
e674a49a CB |
23 | |
24 | #define KERN_IMAGE_START 0x010000UL | |
25 | #define KERN_PARM_AREA 0x010480UL | |
26 | #define INITRD_START 0x800000UL | |
27 | #define INITRD_PARM_START 0x010408UL | |
28 | #define INITRD_PARM_SIZE 0x010410UL | |
29 | #define PARMFILE_START 0x001000UL | |
e674a49a CB |
30 | #define ZIPL_IMAGE_START 0x009000UL |
31 | #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64) | |
32 | ||
2e13fbe4 FZ |
33 | static const VMStateDescription vmstate_iplb = { |
34 | .name = "ipl/iplb", | |
35 | .version_id = 0, | |
36 | .minimum_version_id = 0, | |
37 | .fields = (VMStateField[]) { | |
38 | VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110), | |
39 | VMSTATE_UINT16(devno, IplParameterBlock), | |
40 | VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88), | |
41 | VMSTATE_END_OF_LIST() | |
42 | } | |
43 | }; | |
44 | ||
45 | static const VMStateDescription vmstate_ipl = { | |
46 | .name = "ipl", | |
47 | .version_id = 0, | |
48 | .minimum_version_id = 0, | |
49 | .fields = (VMStateField[]) { | |
50 | VMSTATE_UINT64(start_addr, S390IPLState), | |
51 | VMSTATE_UINT64(bios_start_addr, S390IPLState), | |
52 | VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock), | |
53 | VMSTATE_BOOL(iplb_valid, S390IPLState), | |
54 | VMSTATE_UINT8(cssid, S390IPLState), | |
55 | VMSTATE_UINT8(ssid, S390IPLState), | |
56 | VMSTATE_UINT16(devno, S390IPLState), | |
57 | VMSTATE_END_OF_LIST() | |
58 | } | |
59 | }; | |
e674a49a | 60 | |
feacc6c2 DH |
61 | static S390IPLState *get_ipl_device(void) |
62 | { | |
63 | return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL)); | |
64 | } | |
65 | ||
d884c86d TH |
66 | static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr) |
67 | { | |
68 | uint64_t dstaddr = *(uint64_t *) opaque; | |
69 | /* | |
70 | * Assuming that our s390-ccw.img was linked for starting at address 0, | |
71 | * we can simply add the destination address for the final location | |
72 | */ | |
73 | return srcaddr + dstaddr; | |
74 | } | |
75 | ||
04fccf10 | 76 | static void s390_ipl_realize(DeviceState *dev, Error **errp) |
e674a49a CB |
77 | { |
78 | S390IPLState *ipl = S390_IPL(dev); | |
7691993c | 79 | uint64_t pentry = KERN_IMAGE_START; |
376827d4 | 80 | int kernel_size; |
e6da780d | 81 | Error *err = NULL; |
e674a49a | 82 | |
f0180f91 FZ |
83 | int bios_size; |
84 | char *bios_filename; | |
e674a49a | 85 | |
f0180f91 FZ |
86 | /* |
87 | * Always load the bios if it was enforced, | |
88 | * even if an external kernel has been defined. | |
89 | */ | |
90 | if (!ipl->kernel || ipl->enforce_bios) { | |
d884c86d TH |
91 | uint64_t fwbase = (MIN(ram_size, 0x80000000U) - 0x200000) & ~0xffffUL; |
92 | ||
e674a49a | 93 | if (bios_name == NULL) { |
d0249ce5 | 94 | bios_name = ipl->firmware; |
e674a49a CB |
95 | } |
96 | ||
97 | bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); | |
1f7de853 | 98 | if (bios_filename == NULL) { |
e6da780d | 99 | error_setg(&err, "could not find stage1 bootloader"); |
8f04e88e | 100 | goto error; |
1f7de853 DD |
101 | } |
102 | ||
d884c86d TH |
103 | bios_size = load_elf(bios_filename, bios_translate_addr, &fwbase, |
104 | &ipl->bios_start_addr, NULL, NULL, 1, | |
7ef295ea | 105 | EM_S390, 0, 0); |
d884c86d TH |
106 | if (bios_size > 0) { |
107 | /* Adjust ELF start address to final location */ | |
108 | ipl->bios_start_addr += fwbase; | |
109 | } else { | |
6e9965d4 | 110 | /* Try to load non-ELF file (e.g. s390-ccw.img) */ |
33259956 AG |
111 | bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, |
112 | 4096); | |
f0180f91 | 113 | ipl->bios_start_addr = ZIPL_IMAGE_START; |
33259956 | 114 | } |
e674a49a CB |
115 | g_free(bios_filename); |
116 | ||
376827d4 | 117 | if (bios_size == -1) { |
e6da780d | 118 | error_setg(&err, "could not load bootloader '%s'", bios_name); |
8f04e88e | 119 | goto error; |
e674a49a | 120 | } |
7691993c | 121 | |
f0180f91 FZ |
122 | /* default boot target is the bios */ |
123 | ipl->start_addr = ipl->bios_start_addr; | |
e674a49a | 124 | } |
7691993c | 125 | |
f0180f91 FZ |
126 | if (ipl->kernel) { |
127 | kernel_size = load_elf(ipl->kernel, NULL, NULL, &pentry, NULL, | |
7ef295ea | 128 | NULL, 1, EM_S390, 0, 0); |
f0180f91 FZ |
129 | if (kernel_size < 0) { |
130 | kernel_size = load_image_targphys(ipl->kernel, 0, ram_size); | |
131 | } | |
132 | if (kernel_size < 0) { | |
e6da780d | 133 | error_setg(&err, "could not load kernel '%s'", ipl->kernel); |
8f04e88e | 134 | goto error; |
e674a49a | 135 | } |
f0180f91 FZ |
136 | /* |
137 | * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the | |
138 | * kernel parameters here as well. Note: For old kernels (up to 3.2) | |
139 | * we can not rely on the ELF entry point - it was 0x800 (the SALIPL | |
140 | * loader) and it won't work. For this case we force it to 0x10000, too. | |
141 | */ | |
142 | if (pentry == KERN_IMAGE_START || pentry == 0x800) { | |
143 | ipl->start_addr = KERN_IMAGE_START; | |
144 | /* Overwrite parameters in the kernel image, which are "rom" */ | |
145 | strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline); | |
146 | } else { | |
147 | ipl->start_addr = pentry; | |
e674a49a CB |
148 | } |
149 | ||
f0180f91 FZ |
150 | if (ipl->initrd) { |
151 | ram_addr_t initrd_offset; | |
152 | int initrd_size; | |
153 | ||
154 | initrd_offset = INITRD_START; | |
155 | while (kernel_size + 0x100000 > initrd_offset) { | |
156 | initrd_offset += 0x100000; | |
157 | } | |
158 | initrd_size = load_image_targphys(ipl->initrd, initrd_offset, | |
159 | ram_size - initrd_offset); | |
160 | if (initrd_size == -1) { | |
e6da780d | 161 | error_setg(&err, "could not load initrd '%s'", ipl->initrd); |
8f04e88e | 162 | goto error; |
f0180f91 | 163 | } |
e674a49a | 164 | |
f0180f91 FZ |
165 | /* |
166 | * we have to overwrite values in the kernel image, | |
167 | * which are "rom" | |
168 | */ | |
169 | stq_p(rom_ptr(INITRD_PARM_START), initrd_offset); | |
170 | stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size); | |
171 | } | |
172 | } | |
04fccf10 | 173 | qemu_register_reset(qdev_reset_all_fn, dev); |
8f04e88e | 174 | error: |
e6da780d | 175 | error_propagate(errp, err); |
e674a49a CB |
176 | } |
177 | ||
178 | static Property s390_ipl_properties[] = { | |
179 | DEFINE_PROP_STRING("kernel", S390IPLState, kernel), | |
180 | DEFINE_PROP_STRING("initrd", S390IPLState, initrd), | |
181 | DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), | |
d0249ce5 | 182 | DEFINE_PROP_STRING("firmware", S390IPLState, firmware), |
f0180f91 | 183 | DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false), |
e674a49a CB |
184 | DEFINE_PROP_END_OF_LIST(), |
185 | }; | |
186 | ||
df75a4e2 FZ |
187 | /* |
188 | * In addition to updating the iplstate, this function returns: | |
189 | * - 0 if system was ipled with external kernel | |
190 | * - -1 if no valid boot device was found | |
191 | * - ccw id of the boot device otherwise | |
192 | */ | |
db3b2566 | 193 | static uint64_t s390_update_iplstate(S390IPLState *ipl) |
df75a4e2 FZ |
194 | { |
195 | DeviceState *dev_st; | |
196 | ||
197 | if (ipl->iplb_valid) { | |
198 | ipl->cssid = 0; | |
199 | ipl->ssid = 0; | |
200 | ipl->devno = ipl->iplb.devno; | |
201 | goto out; | |
202 | } | |
203 | ||
204 | if (ipl->kernel) { | |
205 | return 0; | |
206 | } | |
207 | ||
208 | dev_st = get_boot_device(0); | |
209 | if (dev_st) { | |
210 | VirtioCcwDevice *ccw_dev = (VirtioCcwDevice *) object_dynamic_cast( | |
211 | OBJECT(qdev_get_parent_bus(dev_st)->parent), | |
212 | TYPE_VIRTIO_CCW_DEVICE); | |
213 | if (ccw_dev) { | |
214 | ipl->cssid = ccw_dev->sch->cssid; | |
215 | ipl->ssid = ccw_dev->sch->ssid; | |
216 | ipl->devno = ccw_dev->sch->devno; | |
217 | goto out; | |
218 | } | |
219 | } | |
220 | ||
221 | return -1; | |
222 | out: | |
6efd2c2a | 223 | return (uint32_t) (ipl->cssid << 24 | ipl->ssid << 16 | ipl->devno); |
df75a4e2 FZ |
224 | } |
225 | ||
feacc6c2 | 226 | void s390_ipl_update_diag308(IplParameterBlock *iplb) |
df75a4e2 | 227 | { |
feacc6c2 | 228 | S390IPLState *ipl = get_ipl_device(); |
df75a4e2 | 229 | |
feacc6c2 DH |
230 | ipl->iplb = *iplb; |
231 | ipl->iplb_valid = true; | |
df75a4e2 FZ |
232 | } |
233 | ||
234 | IplParameterBlock *s390_ipl_get_iplb(void) | |
235 | { | |
feacc6c2 | 236 | S390IPLState *ipl = get_ipl_device(); |
df75a4e2 | 237 | |
feacc6c2 | 238 | if (!ipl->iplb_valid) { |
df75a4e2 FZ |
239 | return NULL; |
240 | } | |
241 | return &ipl->iplb; | |
242 | } | |
243 | ||
e91e972c FZ |
244 | void s390_reipl_request(void) |
245 | { | |
feacc6c2 | 246 | S390IPLState *ipl = get_ipl_device(); |
e91e972c | 247 | |
e91e972c FZ |
248 | ipl->reipl_requested = true; |
249 | qemu_system_reset_request(); | |
250 | } | |
251 | ||
db3b2566 DH |
252 | void s390_ipl_prepare_cpu(S390CPU *cpu) |
253 | { | |
254 | S390IPLState *ipl = get_ipl_device(); | |
255 | ||
256 | cpu->env.psw.addr = ipl->start_addr; | |
257 | cpu->env.psw.mask = IPL_PSW_MASK; | |
258 | ||
259 | if (!ipl->kernel || ipl->iplb_valid) { | |
260 | cpu->env.psw.addr = ipl->bios_start_addr; | |
261 | cpu->env.regs[7] = s390_update_iplstate(ipl); | |
262 | } | |
263 | } | |
264 | ||
e674a49a CB |
265 | static void s390_ipl_reset(DeviceState *dev) |
266 | { | |
267 | S390IPLState *ipl = S390_IPL(dev); | |
ba1509c0 | 268 | |
e91e972c FZ |
269 | if (!ipl->reipl_requested) { |
270 | ipl->iplb_valid = false; | |
271 | } | |
272 | ipl->reipl_requested = false; | |
e674a49a CB |
273 | } |
274 | ||
275 | static void s390_ipl_class_init(ObjectClass *klass, void *data) | |
276 | { | |
277 | DeviceClass *dc = DEVICE_CLASS(klass); | |
e674a49a | 278 | |
04fccf10 | 279 | dc->realize = s390_ipl_realize; |
e674a49a CB |
280 | dc->props = s390_ipl_properties; |
281 | dc->reset = s390_ipl_reset; | |
2e13fbe4 | 282 | dc->vmsd = &vmstate_ipl; |
b4ab4572 | 283 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
e674a49a CB |
284 | } |
285 | ||
49973ebc | 286 | static const TypeInfo s390_ipl_info = { |
e674a49a | 287 | .class_init = s390_ipl_class_init, |
04fccf10 DH |
288 | .parent = TYPE_DEVICE, |
289 | .name = TYPE_S390_IPL, | |
e674a49a CB |
290 | .instance_size = sizeof(S390IPLState), |
291 | }; | |
292 | ||
293 | static void s390_ipl_register_types(void) | |
294 | { | |
295 | type_register_static(&s390_ipl_info); | |
296 | } | |
297 | ||
298 | type_init(s390_ipl_register_types) |