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 "sysemu/sysemu.h"
17 #include "exec/ram_addr.h"
18 #include "hw/loader.h"
19 #include "hw/sysbus.h"
20 #include "hw/s390x/virtio-ccw.h"
21 #include "hw/s390x/css.h"
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
30 #define ZIPL_IMAGE_START 0x009000UL
31 #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64)
33 #define TYPE_S390_IPL "s390-ipl"
34 #define S390_IPL(obj) \
35 OBJECT_CHECK(S390IPLState, (obj), TYPE_S390_IPL)
37 #define S390_IPL_CLASS(klass) \
38 OBJECT_CLASS_CHECK(S390IPLState, (klass), TYPE_S390_IPL)
39 #define S390_IPL_GET_CLASS(obj) \
40 OBJECT_GET_CLASS(S390IPLState, (obj), TYPE_S390_IPL)
43 typedef struct S390IPLClass
{
45 SysBusDeviceClass parent_class
;
48 void (*parent_reset
) (SysBusDevice
*dev
);
51 typedef struct S390IPLState
{
53 SysBusDevice parent_obj
;
55 uint64_t bios_start_addr
;
57 IplParameterBlock iplb
;
71 static const VMStateDescription vmstate_iplb
= {
74 .minimum_version_id
= 0,
75 .fields
= (VMStateField
[]) {
76 VMSTATE_UINT8_ARRAY(reserved1
, IplParameterBlock
, 110),
77 VMSTATE_UINT16(devno
, IplParameterBlock
),
78 VMSTATE_UINT8_ARRAY(reserved2
, IplParameterBlock
, 88),
83 static const VMStateDescription vmstate_ipl
= {
86 .minimum_version_id
= 0,
87 .fields
= (VMStateField
[]) {
88 VMSTATE_UINT64(start_addr
, S390IPLState
),
89 VMSTATE_UINT64(bios_start_addr
, S390IPLState
),
90 VMSTATE_STRUCT(iplb
, S390IPLState
, 0, vmstate_iplb
, IplParameterBlock
),
91 VMSTATE_BOOL(iplb_valid
, S390IPLState
),
92 VMSTATE_UINT8(cssid
, S390IPLState
),
93 VMSTATE_UINT8(ssid
, S390IPLState
),
94 VMSTATE_UINT16(devno
, S390IPLState
),
99 static uint64_t bios_translate_addr(void *opaque
, uint64_t srcaddr
)
101 uint64_t dstaddr
= *(uint64_t *) opaque
;
103 * Assuming that our s390-ccw.img was linked for starting at address 0,
104 * we can simply add the destination address for the final location
106 return srcaddr
+ dstaddr
;
109 static int s390_ipl_init(SysBusDevice
*dev
)
111 S390IPLState
*ipl
= S390_IPL(dev
);
112 uint64_t pentry
= KERN_IMAGE_START
;
119 * Always load the bios if it was enforced,
120 * even if an external kernel has been defined.
122 if (!ipl
->kernel
|| ipl
->enforce_bios
) {
123 uint64_t fwbase
= (MIN(ram_size
, 0x80000000U
) - 0x200000) & ~0xffffUL
;
125 if (bios_name
== NULL
) {
126 bios_name
= ipl
->firmware
;
129 bios_filename
= qemu_find_file(QEMU_FILE_TYPE_BIOS
, bios_name
);
130 if (bios_filename
== NULL
) {
131 hw_error("could not find stage1 bootloader\n");
134 bios_size
= load_elf(bios_filename
, bios_translate_addr
, &fwbase
,
135 &ipl
->bios_start_addr
, NULL
, NULL
, 1,
138 /* Adjust ELF start address to final location */
139 ipl
->bios_start_addr
+= fwbase
;
141 /* Try to load non-ELF file (e.g. s390-zipl.rom) */
142 bios_size
= load_image_targphys(bios_filename
, ZIPL_IMAGE_START
,
144 ipl
->bios_start_addr
= ZIPL_IMAGE_START
;
145 if (bios_size
> 4096) {
146 hw_error("stage1 bootloader is > 4k\n");
149 g_free(bios_filename
);
151 if (bios_size
== -1) {
152 hw_error("could not load bootloader '%s'\n", bios_name
);
155 /* default boot target is the bios */
156 ipl
->start_addr
= ipl
->bios_start_addr
;
160 kernel_size
= load_elf(ipl
->kernel
, NULL
, NULL
, &pentry
, NULL
,
161 NULL
, 1, ELF_MACHINE
, 0);
162 if (kernel_size
< 0) {
163 kernel_size
= load_image_targphys(ipl
->kernel
, 0, ram_size
);
165 if (kernel_size
< 0) {
166 fprintf(stderr
, "could not load kernel '%s'\n", ipl
->kernel
);
170 * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
171 * kernel parameters here as well. Note: For old kernels (up to 3.2)
172 * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
173 * loader) and it won't work. For this case we force it to 0x10000, too.
175 if (pentry
== KERN_IMAGE_START
|| pentry
== 0x800) {
176 ipl
->start_addr
= KERN_IMAGE_START
;
177 /* Overwrite parameters in the kernel image, which are "rom" */
178 strcpy(rom_ptr(KERN_PARM_AREA
), ipl
->cmdline
);
180 ipl
->start_addr
= pentry
;
184 ram_addr_t initrd_offset
;
187 initrd_offset
= INITRD_START
;
188 while (kernel_size
+ 0x100000 > initrd_offset
) {
189 initrd_offset
+= 0x100000;
191 initrd_size
= load_image_targphys(ipl
->initrd
, initrd_offset
,
192 ram_size
- initrd_offset
);
193 if (initrd_size
== -1) {
194 fprintf(stderr
, "qemu: could not load initrd '%s'\n",
200 * we have to overwrite values in the kernel image,
203 stq_p(rom_ptr(INITRD_PARM_START
), initrd_offset
);
204 stq_p(rom_ptr(INITRD_PARM_SIZE
), initrd_size
);
210 static Property s390_ipl_properties
[] = {
211 DEFINE_PROP_STRING("kernel", S390IPLState
, kernel
),
212 DEFINE_PROP_STRING("initrd", S390IPLState
, initrd
),
213 DEFINE_PROP_STRING("cmdline", S390IPLState
, cmdline
),
214 DEFINE_PROP_STRING("firmware", S390IPLState
, firmware
),
215 DEFINE_PROP_BOOL("enforce_bios", S390IPLState
, enforce_bios
, false),
216 DEFINE_PROP_END_OF_LIST(),
220 * In addition to updating the iplstate, this function returns:
221 * - 0 if system was ipled with external kernel
222 * - -1 if no valid boot device was found
223 * - ccw id of the boot device otherwise
225 static uint64_t s390_update_iplstate(CPUS390XState
*env
, S390IPLState
*ipl
)
229 if (ipl
->iplb_valid
) {
232 ipl
->devno
= ipl
->iplb
.devno
;
240 dev_st
= get_boot_device(0);
242 VirtioCcwDevice
*ccw_dev
= (VirtioCcwDevice
*) object_dynamic_cast(
243 OBJECT(qdev_get_parent_bus(dev_st
)->parent
),
244 TYPE_VIRTIO_CCW_DEVICE
);
246 ipl
->cssid
= ccw_dev
->sch
->cssid
;
247 ipl
->ssid
= ccw_dev
->sch
->ssid
;
248 ipl
->devno
= ccw_dev
->sch
->devno
;
255 return ipl
->cssid
<< 24 | ipl
->ssid
<< 16 | ipl
->devno
;
258 int s390_ipl_update_diag308(IplParameterBlock
*iplb
)
262 ipl
= S390_IPL(object_resolve_path(TYPE_S390_IPL
, NULL
));
265 ipl
->iplb_valid
= true;
271 IplParameterBlock
*s390_ipl_get_iplb(void)
275 ipl
= S390_IPL(object_resolve_path(TYPE_S390_IPL
, NULL
));
276 if (!ipl
|| !ipl
->iplb_valid
) {
282 void s390_reipl_request(void)
286 ipl
= S390_IPL(object_resolve_path(TYPE_S390_IPL
, NULL
));
287 ipl
->reipl_requested
= true;
288 qemu_system_reset_request();
291 static void s390_ipl_reset(DeviceState
*dev
)
293 S390IPLState
*ipl
= S390_IPL(dev
);
294 S390CPU
*cpu
= S390_CPU(qemu_get_cpu(0));
295 CPUS390XState
*env
= &cpu
->env
;
297 env
->psw
.addr
= ipl
->start_addr
;
298 env
->psw
.mask
= IPL_PSW_MASK
;
300 if (!ipl
->reipl_requested
) {
301 ipl
->iplb_valid
= false;
303 ipl
->reipl_requested
= false;
305 if (!ipl
->kernel
|| ipl
->iplb_valid
) {
306 env
->psw
.addr
= ipl
->bios_start_addr
;
307 env
->regs
[7] = s390_update_iplstate(env
, ipl
);
310 s390_cpu_set_state(CPU_STATE_OPERATING
, cpu
);
313 static void s390_ipl_class_init(ObjectClass
*klass
, void *data
)
315 DeviceClass
*dc
= DEVICE_CLASS(klass
);
316 SysBusDeviceClass
*k
= SYS_BUS_DEVICE_CLASS(klass
);
318 k
->init
= s390_ipl_init
;
319 dc
->props
= s390_ipl_properties
;
320 dc
->reset
= s390_ipl_reset
;
321 dc
->vmsd
= &vmstate_ipl
;
324 static const TypeInfo s390_ipl_info
= {
325 .class_init
= s390_ipl_class_init
,
326 .parent
= TYPE_SYS_BUS_DEVICE
,
328 .instance_size
= sizeof(S390IPLState
),
331 static void s390_ipl_register_types(void)
333 type_register_static(&s390_ipl_info
);
336 type_init(s390_ipl_register_types
)