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e674a49a CB |
1 | /* |
2 | * bootloader support | |
3 | * | |
4 | * Copyright IBM, Corp. 2012 | |
5 | * | |
6 | * Authors: | |
7 | * Christian Borntraeger <[email protected]> | |
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" | |
df75a4e2 | 21 | #include "ipl.h" |
e674a49a CB |
22 | |
23 | #define KERN_IMAGE_START 0x010000UL | |
24 | #define KERN_PARM_AREA 0x010480UL | |
25 | #define INITRD_START 0x800000UL | |
26 | #define INITRD_PARM_START 0x010408UL | |
27 | #define INITRD_PARM_SIZE 0x010410UL | |
28 | #define PARMFILE_START 0x001000UL | |
e674a49a CB |
29 | #define ZIPL_IMAGE_START 0x009000UL |
30 | #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64) | |
31 | ||
32 | #define TYPE_S390_IPL "s390-ipl" | |
33 | #define S390_IPL(obj) \ | |
34 | OBJECT_CHECK(S390IPLState, (obj), TYPE_S390_IPL) | |
35 | #if 0 | |
36 | #define S390_IPL_CLASS(klass) \ | |
37 | OBJECT_CLASS_CHECK(S390IPLState, (klass), TYPE_S390_IPL) | |
38 | #define S390_IPL_GET_CLASS(obj) \ | |
39 | OBJECT_GET_CLASS(S390IPLState, (obj), TYPE_S390_IPL) | |
40 | #endif | |
41 | ||
42 | typedef struct S390IPLClass { | |
43 | /*< private >*/ | |
44 | SysBusDeviceClass parent_class; | |
45 | /*< public >*/ | |
46 | ||
47 | void (*parent_reset) (SysBusDevice *dev); | |
48 | } S390IPLClass; | |
49 | ||
50 | typedef struct S390IPLState { | |
51 | /*< private >*/ | |
52 | SysBusDevice parent_obj; | |
74ad2d22 | 53 | uint64_t start_addr; |
f0180f91 FZ |
54 | uint64_t bios_start_addr; |
55 | bool enforce_bios; | |
df75a4e2 FZ |
56 | IplParameterBlock iplb; |
57 | bool iplb_valid; | |
e91e972c | 58 | bool reipl_requested; |
e674a49a | 59 | |
74ad2d22 | 60 | /*< public >*/ |
e674a49a CB |
61 | char *kernel; |
62 | char *initrd; | |
63 | char *cmdline; | |
d0249ce5 | 64 | char *firmware; |
df75a4e2 FZ |
65 | uint8_t cssid; |
66 | uint8_t ssid; | |
67 | uint16_t devno; | |
e674a49a CB |
68 | } S390IPLState; |
69 | ||
2e13fbe4 FZ |
70 | static const VMStateDescription vmstate_iplb = { |
71 | .name = "ipl/iplb", | |
72 | .version_id = 0, | |
73 | .minimum_version_id = 0, | |
74 | .fields = (VMStateField[]) { | |
75 | VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110), | |
76 | VMSTATE_UINT16(devno, IplParameterBlock), | |
77 | VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88), | |
78 | VMSTATE_END_OF_LIST() | |
79 | } | |
80 | }; | |
81 | ||
82 | static const VMStateDescription vmstate_ipl = { | |
83 | .name = "ipl", | |
84 | .version_id = 0, | |
85 | .minimum_version_id = 0, | |
86 | .fields = (VMStateField[]) { | |
87 | VMSTATE_UINT64(start_addr, S390IPLState), | |
88 | VMSTATE_UINT64(bios_start_addr, S390IPLState), | |
89 | VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock), | |
90 | VMSTATE_BOOL(iplb_valid, S390IPLState), | |
91 | VMSTATE_UINT8(cssid, S390IPLState), | |
92 | VMSTATE_UINT8(ssid, S390IPLState), | |
93 | VMSTATE_UINT16(devno, S390IPLState), | |
94 | VMSTATE_END_OF_LIST() | |
95 | } | |
96 | }; | |
e674a49a | 97 | |
d884c86d TH |
98 | static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr) |
99 | { | |
100 | uint64_t dstaddr = *(uint64_t *) opaque; | |
101 | /* | |
102 | * Assuming that our s390-ccw.img was linked for starting at address 0, | |
103 | * we can simply add the destination address for the final location | |
104 | */ | |
105 | return srcaddr + dstaddr; | |
106 | } | |
107 | ||
e674a49a CB |
108 | static int s390_ipl_init(SysBusDevice *dev) |
109 | { | |
110 | S390IPLState *ipl = S390_IPL(dev); | |
7691993c | 111 | uint64_t pentry = KERN_IMAGE_START; |
376827d4 | 112 | int kernel_size; |
e674a49a | 113 | |
f0180f91 FZ |
114 | int bios_size; |
115 | char *bios_filename; | |
e674a49a | 116 | |
f0180f91 FZ |
117 | /* |
118 | * Always load the bios if it was enforced, | |
119 | * even if an external kernel has been defined. | |
120 | */ | |
121 | if (!ipl->kernel || ipl->enforce_bios) { | |
d884c86d TH |
122 | uint64_t fwbase = (MIN(ram_size, 0x80000000U) - 0x200000) & ~0xffffUL; |
123 | ||
e674a49a | 124 | if (bios_name == NULL) { |
d0249ce5 | 125 | bios_name = ipl->firmware; |
e674a49a CB |
126 | } |
127 | ||
128 | bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); | |
1f7de853 DD |
129 | if (bios_filename == NULL) { |
130 | hw_error("could not find stage1 bootloader\n"); | |
131 | } | |
132 | ||
d884c86d TH |
133 | bios_size = load_elf(bios_filename, bios_translate_addr, &fwbase, |
134 | &ipl->bios_start_addr, NULL, NULL, 1, | |
135 | ELF_MACHINE, 0); | |
136 | if (bios_size > 0) { | |
137 | /* Adjust ELF start address to final location */ | |
138 | ipl->bios_start_addr += fwbase; | |
139 | } else { | |
140 | /* Try to load non-ELF file (e.g. s390-zipl.rom) */ | |
33259956 AG |
141 | bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, |
142 | 4096); | |
f0180f91 | 143 | ipl->bios_start_addr = ZIPL_IMAGE_START; |
33259956 | 144 | } |
e674a49a CB |
145 | g_free(bios_filename); |
146 | ||
376827d4 | 147 | if (bios_size == -1) { |
e674a49a CB |
148 | hw_error("could not load bootloader '%s'\n", bios_name); |
149 | } | |
7691993c | 150 | |
f0180f91 FZ |
151 | /* default boot target is the bios */ |
152 | ipl->start_addr = ipl->bios_start_addr; | |
e674a49a | 153 | } |
7691993c | 154 | |
f0180f91 FZ |
155 | if (ipl->kernel) { |
156 | kernel_size = load_elf(ipl->kernel, NULL, NULL, &pentry, NULL, | |
157 | NULL, 1, ELF_MACHINE, 0); | |
158 | if (kernel_size < 0) { | |
159 | kernel_size = load_image_targphys(ipl->kernel, 0, ram_size); | |
160 | } | |
161 | if (kernel_size < 0) { | |
162 | fprintf(stderr, "could not load kernel '%s'\n", ipl->kernel); | |
163 | return -1; | |
e674a49a | 164 | } |
f0180f91 FZ |
165 | /* |
166 | * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the | |
167 | * kernel parameters here as well. Note: For old kernels (up to 3.2) | |
168 | * we can not rely on the ELF entry point - it was 0x800 (the SALIPL | |
169 | * loader) and it won't work. For this case we force it to 0x10000, too. | |
170 | */ | |
171 | if (pentry == KERN_IMAGE_START || pentry == 0x800) { | |
172 | ipl->start_addr = KERN_IMAGE_START; | |
173 | /* Overwrite parameters in the kernel image, which are "rom" */ | |
174 | strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline); | |
175 | } else { | |
176 | ipl->start_addr = pentry; | |
e674a49a CB |
177 | } |
178 | ||
f0180f91 FZ |
179 | if (ipl->initrd) { |
180 | ram_addr_t initrd_offset; | |
181 | int initrd_size; | |
182 | ||
183 | initrd_offset = INITRD_START; | |
184 | while (kernel_size + 0x100000 > initrd_offset) { | |
185 | initrd_offset += 0x100000; | |
186 | } | |
187 | initrd_size = load_image_targphys(ipl->initrd, initrd_offset, | |
188 | ram_size - initrd_offset); | |
189 | if (initrd_size == -1) { | |
190 | fprintf(stderr, "qemu: could not load initrd '%s'\n", | |
191 | ipl->initrd); | |
192 | exit(1); | |
193 | } | |
e674a49a | 194 | |
f0180f91 FZ |
195 | /* |
196 | * we have to overwrite values in the kernel image, | |
197 | * which are "rom" | |
198 | */ | |
199 | stq_p(rom_ptr(INITRD_PARM_START), initrd_offset); | |
200 | stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size); | |
201 | } | |
202 | } | |
e674a49a CB |
203 | return 0; |
204 | } | |
205 | ||
206 | static Property s390_ipl_properties[] = { | |
207 | DEFINE_PROP_STRING("kernel", S390IPLState, kernel), | |
208 | DEFINE_PROP_STRING("initrd", S390IPLState, initrd), | |
209 | DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), | |
d0249ce5 | 210 | DEFINE_PROP_STRING("firmware", S390IPLState, firmware), |
f0180f91 | 211 | DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false), |
e674a49a CB |
212 | DEFINE_PROP_END_OF_LIST(), |
213 | }; | |
214 | ||
df75a4e2 FZ |
215 | /* |
216 | * In addition to updating the iplstate, this function returns: | |
217 | * - 0 if system was ipled with external kernel | |
218 | * - -1 if no valid boot device was found | |
219 | * - ccw id of the boot device otherwise | |
220 | */ | |
6efd2c2a | 221 | static uint64_t s390_update_iplstate(CPUS390XState *env, S390IPLState *ipl) |
df75a4e2 FZ |
222 | { |
223 | DeviceState *dev_st; | |
224 | ||
225 | if (ipl->iplb_valid) { | |
226 | ipl->cssid = 0; | |
227 | ipl->ssid = 0; | |
228 | ipl->devno = ipl->iplb.devno; | |
229 | goto out; | |
230 | } | |
231 | ||
232 | if (ipl->kernel) { | |
233 | return 0; | |
234 | } | |
235 | ||
236 | dev_st = get_boot_device(0); | |
237 | if (dev_st) { | |
238 | VirtioCcwDevice *ccw_dev = (VirtioCcwDevice *) object_dynamic_cast( | |
239 | OBJECT(qdev_get_parent_bus(dev_st)->parent), | |
240 | TYPE_VIRTIO_CCW_DEVICE); | |
241 | if (ccw_dev) { | |
242 | ipl->cssid = ccw_dev->sch->cssid; | |
243 | ipl->ssid = ccw_dev->sch->ssid; | |
244 | ipl->devno = ccw_dev->sch->devno; | |
245 | goto out; | |
246 | } | |
247 | } | |
248 | ||
249 | return -1; | |
250 | out: | |
6efd2c2a | 251 | return (uint32_t) (ipl->cssid << 24 | ipl->ssid << 16 | ipl->devno); |
df75a4e2 FZ |
252 | } |
253 | ||
254 | int s390_ipl_update_diag308(IplParameterBlock *iplb) | |
255 | { | |
256 | S390IPLState *ipl; | |
257 | ||
258 | ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL)); | |
259 | if (ipl) { | |
260 | ipl->iplb = *iplb; | |
261 | ipl->iplb_valid = true; | |
262 | return 0; | |
263 | } | |
264 | return -1; | |
265 | } | |
266 | ||
267 | IplParameterBlock *s390_ipl_get_iplb(void) | |
268 | { | |
269 | S390IPLState *ipl; | |
270 | ||
271 | ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL)); | |
272 | if (!ipl || !ipl->iplb_valid) { | |
273 | return NULL; | |
274 | } | |
275 | return &ipl->iplb; | |
276 | } | |
277 | ||
e91e972c FZ |
278 | void s390_reipl_request(void) |
279 | { | |
280 | S390IPLState *ipl; | |
281 | ||
282 | ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL)); | |
283 | ipl->reipl_requested = true; | |
284 | qemu_system_reset_request(); | |
285 | } | |
286 | ||
e674a49a CB |
287 | static void s390_ipl_reset(DeviceState *dev) |
288 | { | |
289 | S390IPLState *ipl = S390_IPL(dev); | |
2c4c71ee DD |
290 | S390CPU *cpu = S390_CPU(qemu_get_cpu(0)); |
291 | CPUS390XState *env = &cpu->env; | |
e674a49a | 292 | |
2c4c71ee DD |
293 | env->psw.addr = ipl->start_addr; |
294 | env->psw.mask = IPL_PSW_MASK; | |
ba1509c0 | 295 | |
e91e972c FZ |
296 | if (!ipl->reipl_requested) { |
297 | ipl->iplb_valid = false; | |
298 | } | |
299 | ipl->reipl_requested = false; | |
300 | ||
df75a4e2 FZ |
301 | if (!ipl->kernel || ipl->iplb_valid) { |
302 | env->psw.addr = ipl->bios_start_addr; | |
303 | env->regs[7] = s390_update_iplstate(env, ipl); | |
ba1509c0 DD |
304 | } |
305 | ||
eb24f7c6 | 306 | s390_cpu_set_state(CPU_STATE_OPERATING, cpu); |
e674a49a CB |
307 | } |
308 | ||
309 | static void s390_ipl_class_init(ObjectClass *klass, void *data) | |
310 | { | |
311 | DeviceClass *dc = DEVICE_CLASS(klass); | |
312 | SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); | |
313 | ||
314 | k->init = s390_ipl_init; | |
315 | dc->props = s390_ipl_properties; | |
316 | dc->reset = s390_ipl_reset; | |
2e13fbe4 | 317 | dc->vmsd = &vmstate_ipl; |
b4ab4572 | 318 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
e674a49a CB |
319 | } |
320 | ||
49973ebc | 321 | static const TypeInfo s390_ipl_info = { |
e674a49a CB |
322 | .class_init = s390_ipl_class_init, |
323 | .parent = TYPE_SYS_BUS_DEVICE, | |
324 | .name = "s390-ipl", | |
325 | .instance_size = sizeof(S390IPLState), | |
326 | }; | |
327 | ||
328 | static void s390_ipl_register_types(void) | |
329 | { | |
330 | type_register_static(&s390_ipl_info); | |
331 | } | |
332 | ||
333 | type_init(s390_ipl_register_types) |