4 * Copyright IBM, Corp. 2012
7 * Christian Borntraeger <borntraeger@de.ibm.com>
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.
14 #include "qemu/osdep.h"
15 #include "sysemu/sysemu.h"
18 #include "hw/loader.h"
19 #include "hw/s390x/virtio-ccw.h"
20 #include "hw/s390x/css.h"
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
29 #define ZIPL_IMAGE_START 0x009000UL
30 #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64)
32 static const VMStateDescription vmstate_iplb
= {
35 .minimum_version_id
= 0,
36 .fields
= (VMStateField
[]) {
37 VMSTATE_UINT8_ARRAY(reserved1
, IplParameterBlock
, 110),
38 VMSTATE_UINT16(devno
, IplParameterBlock
),
39 VMSTATE_UINT8_ARRAY(reserved2
, IplParameterBlock
, 88),
44 static const VMStateDescription vmstate_ipl
= {
47 .minimum_version_id
= 0,
48 .fields
= (VMStateField
[]) {
49 VMSTATE_UINT64(start_addr
, S390IPLState
),
50 VMSTATE_UINT64(bios_start_addr
, S390IPLState
),
51 VMSTATE_STRUCT(iplb
, S390IPLState
, 0, vmstate_iplb
, IplParameterBlock
),
52 VMSTATE_BOOL(iplb_valid
, S390IPLState
),
53 VMSTATE_UINT8(cssid
, S390IPLState
),
54 VMSTATE_UINT8(ssid
, S390IPLState
),
55 VMSTATE_UINT16(devno
, S390IPLState
),
60 static S390IPLState
*get_ipl_device(void)
62 return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL
, NULL
));
65 static uint64_t bios_translate_addr(void *opaque
, uint64_t srcaddr
)
67 uint64_t dstaddr
= *(uint64_t *) opaque
;
69 * Assuming that our s390-ccw.img was linked for starting at address 0,
70 * we can simply add the destination address for the final location
72 return srcaddr
+ dstaddr
;
75 static void s390_ipl_realize(DeviceState
*dev
, Error
**errp
)
77 S390IPLState
*ipl
= S390_IPL(dev
);
78 uint64_t pentry
= KERN_IMAGE_START
;
86 * Always load the bios if it was enforced,
87 * even if an external kernel has been defined.
89 if (!ipl
->kernel
|| ipl
->enforce_bios
) {
90 uint64_t fwbase
= (MIN(ram_size
, 0x80000000U
) - 0x200000) & ~0xffffUL
;
92 if (bios_name
== NULL
) {
93 bios_name
= ipl
->firmware
;
96 bios_filename
= qemu_find_file(QEMU_FILE_TYPE_BIOS
, bios_name
);
97 if (bios_filename
== NULL
) {
98 error_setg(&err
, "could not find stage1 bootloader");
102 bios_size
= load_elf(bios_filename
, bios_translate_addr
, &fwbase
,
103 &ipl
->bios_start_addr
, NULL
, NULL
, 1,
106 /* Adjust ELF start address to final location */
107 ipl
->bios_start_addr
+= fwbase
;
109 /* Try to load non-ELF file (e.g. s390-zipl.rom) */
110 bios_size
= load_image_targphys(bios_filename
, ZIPL_IMAGE_START
,
112 ipl
->bios_start_addr
= ZIPL_IMAGE_START
;
114 g_free(bios_filename
);
116 if (bios_size
== -1) {
117 error_setg(&err
, "could not load bootloader '%s'", bios_name
);
121 /* default boot target is the bios */
122 ipl
->start_addr
= ipl
->bios_start_addr
;
126 kernel_size
= load_elf(ipl
->kernel
, NULL
, NULL
, &pentry
, NULL
,
127 NULL
, 1, EM_S390
, 0);
128 if (kernel_size
< 0) {
129 kernel_size
= load_image_targphys(ipl
->kernel
, 0, ram_size
);
131 if (kernel_size
< 0) {
132 error_setg(&err
, "could not load kernel '%s'", ipl
->kernel
);
136 * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
137 * kernel parameters here as well. Note: For old kernels (up to 3.2)
138 * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
139 * loader) and it won't work. For this case we force it to 0x10000, too.
141 if (pentry
== KERN_IMAGE_START
|| pentry
== 0x800) {
142 ipl
->start_addr
= KERN_IMAGE_START
;
143 /* Overwrite parameters in the kernel image, which are "rom" */
144 strcpy(rom_ptr(KERN_PARM_AREA
), ipl
->cmdline
);
146 ipl
->start_addr
= pentry
;
150 ram_addr_t initrd_offset
;
153 initrd_offset
= INITRD_START
;
154 while (kernel_size
+ 0x100000 > initrd_offset
) {
155 initrd_offset
+= 0x100000;
157 initrd_size
= load_image_targphys(ipl
->initrd
, initrd_offset
,
158 ram_size
- initrd_offset
);
159 if (initrd_size
== -1) {
160 error_setg(&err
, "could not load initrd '%s'", ipl
->initrd
);
165 * we have to overwrite values in the kernel image,
168 stq_p(rom_ptr(INITRD_PARM_START
), initrd_offset
);
169 stq_p(rom_ptr(INITRD_PARM_SIZE
), initrd_size
);
172 qemu_register_reset(qdev_reset_all_fn
, dev
);
174 error_propagate(errp
, err
);
177 static Property s390_ipl_properties
[] = {
178 DEFINE_PROP_STRING("kernel", S390IPLState
, kernel
),
179 DEFINE_PROP_STRING("initrd", S390IPLState
, initrd
),
180 DEFINE_PROP_STRING("cmdline", S390IPLState
, cmdline
),
181 DEFINE_PROP_STRING("firmware", S390IPLState
, firmware
),
182 DEFINE_PROP_BOOL("enforce_bios", S390IPLState
, enforce_bios
, false),
183 DEFINE_PROP_END_OF_LIST(),
187 * In addition to updating the iplstate, this function returns:
188 * - 0 if system was ipled with external kernel
189 * - -1 if no valid boot device was found
190 * - ccw id of the boot device otherwise
192 static uint64_t s390_update_iplstate(S390IPLState
*ipl
)
196 if (ipl
->iplb_valid
) {
199 ipl
->devno
= ipl
->iplb
.devno
;
207 dev_st
= get_boot_device(0);
209 VirtioCcwDevice
*ccw_dev
= (VirtioCcwDevice
*) object_dynamic_cast(
210 OBJECT(qdev_get_parent_bus(dev_st
)->parent
),
211 TYPE_VIRTIO_CCW_DEVICE
);
213 ipl
->cssid
= ccw_dev
->sch
->cssid
;
214 ipl
->ssid
= ccw_dev
->sch
->ssid
;
215 ipl
->devno
= ccw_dev
->sch
->devno
;
222 return (uint32_t) (ipl
->cssid
<< 24 | ipl
->ssid
<< 16 | ipl
->devno
);
225 void s390_ipl_update_diag308(IplParameterBlock
*iplb
)
227 S390IPLState
*ipl
= get_ipl_device();
230 ipl
->iplb_valid
= true;
233 IplParameterBlock
*s390_ipl_get_iplb(void)
235 S390IPLState
*ipl
= get_ipl_device();
237 if (!ipl
->iplb_valid
) {
243 void s390_reipl_request(void)
245 S390IPLState
*ipl
= get_ipl_device();
247 ipl
->reipl_requested
= true;
248 qemu_system_reset_request();
251 void s390_ipl_prepare_cpu(S390CPU
*cpu
)
253 S390IPLState
*ipl
= get_ipl_device();
255 cpu
->env
.psw
.addr
= ipl
->start_addr
;
256 cpu
->env
.psw
.mask
= IPL_PSW_MASK
;
258 if (!ipl
->kernel
|| ipl
->iplb_valid
) {
259 cpu
->env
.psw
.addr
= ipl
->bios_start_addr
;
260 cpu
->env
.regs
[7] = s390_update_iplstate(ipl
);
264 static void s390_ipl_reset(DeviceState
*dev
)
266 S390IPLState
*ipl
= S390_IPL(dev
);
268 if (!ipl
->reipl_requested
) {
269 ipl
->iplb_valid
= false;
271 ipl
->reipl_requested
= false;
274 static void s390_ipl_class_init(ObjectClass
*klass
, void *data
)
276 DeviceClass
*dc
= DEVICE_CLASS(klass
);
278 dc
->realize
= s390_ipl_realize
;
279 dc
->props
= s390_ipl_properties
;
280 dc
->reset
= s390_ipl_reset
;
281 dc
->vmsd
= &vmstate_ipl
;
282 set_bit(DEVICE_CATEGORY_MISC
, dc
->categories
);
285 static const TypeInfo s390_ipl_info
= {
286 .class_init
= s390_ipl_class_init
,
287 .parent
= TYPE_DEVICE
,
288 .name
= TYPE_S390_IPL
,
289 .instance_size
= sizeof(S390IPLState
),
292 static void s390_ipl_register_types(void)
294 type_register_static(&s390_ipl_info
);
297 type_init(s390_ipl_register_types
)