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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" | |
18 | #include "hw/sysbus.h" | |
ba1509c0 DD |
19 | #include "hw/s390x/virtio-ccw.h" |
20 | #include "hw/s390x/css.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 | ||
31 | #define TYPE_S390_IPL "s390-ipl" | |
32 | #define S390_IPL(obj) \ | |
33 | OBJECT_CHECK(S390IPLState, (obj), TYPE_S390_IPL) | |
34 | #if 0 | |
35 | #define S390_IPL_CLASS(klass) \ | |
36 | OBJECT_CLASS_CHECK(S390IPLState, (klass), TYPE_S390_IPL) | |
37 | #define S390_IPL_GET_CLASS(obj) \ | |
38 | OBJECT_GET_CLASS(S390IPLState, (obj), TYPE_S390_IPL) | |
39 | #endif | |
40 | ||
41 | typedef struct S390IPLClass { | |
42 | /*< private >*/ | |
43 | SysBusDeviceClass parent_class; | |
44 | /*< public >*/ | |
45 | ||
46 | void (*parent_reset) (SysBusDevice *dev); | |
47 | } S390IPLClass; | |
48 | ||
49 | typedef struct S390IPLState { | |
50 | /*< private >*/ | |
51 | SysBusDevice parent_obj; | |
74ad2d22 | 52 | uint64_t start_addr; |
f0180f91 FZ |
53 | uint64_t bios_start_addr; |
54 | bool enforce_bios; | |
e674a49a | 55 | |
74ad2d22 | 56 | /*< public >*/ |
e674a49a CB |
57 | char *kernel; |
58 | char *initrd; | |
59 | char *cmdline; | |
d0249ce5 | 60 | char *firmware; |
e674a49a CB |
61 | } S390IPLState; |
62 | ||
63 | ||
e674a49a CB |
64 | static int s390_ipl_init(SysBusDevice *dev) |
65 | { | |
66 | S390IPLState *ipl = S390_IPL(dev); | |
7691993c | 67 | uint64_t pentry = KERN_IMAGE_START; |
376827d4 | 68 | int kernel_size; |
e674a49a | 69 | |
f0180f91 FZ |
70 | int bios_size; |
71 | char *bios_filename; | |
e674a49a | 72 | |
f0180f91 FZ |
73 | /* |
74 | * Always load the bios if it was enforced, | |
75 | * even if an external kernel has been defined. | |
76 | */ | |
77 | if (!ipl->kernel || ipl->enforce_bios) { | |
e674a49a | 78 | if (bios_name == NULL) { |
d0249ce5 | 79 | bios_name = ipl->firmware; |
e674a49a CB |
80 | } |
81 | ||
82 | bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); | |
1f7de853 DD |
83 | if (bios_filename == NULL) { |
84 | hw_error("could not find stage1 bootloader\n"); | |
85 | } | |
86 | ||
f0180f91 FZ |
87 | bios_size = load_elf(bios_filename, NULL, NULL, &ipl->bios_start_addr, |
88 | NULL, NULL, 1, ELF_MACHINE, 0); | |
0a1bec8a | 89 | if (bios_size < 0) { |
33259956 AG |
90 | bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, |
91 | 4096); | |
f0180f91 | 92 | ipl->bios_start_addr = ZIPL_IMAGE_START; |
33259956 AG |
93 | if (bios_size > 4096) { |
94 | hw_error("stage1 bootloader is > 4k\n"); | |
95 | } | |
96 | } | |
e674a49a CB |
97 | g_free(bios_filename); |
98 | ||
376827d4 | 99 | if (bios_size == -1) { |
e674a49a CB |
100 | hw_error("could not load bootloader '%s'\n", bios_name); |
101 | } | |
7691993c | 102 | |
f0180f91 FZ |
103 | /* default boot target is the bios */ |
104 | ipl->start_addr = ipl->bios_start_addr; | |
e674a49a | 105 | } |
7691993c | 106 | |
f0180f91 FZ |
107 | if (ipl->kernel) { |
108 | kernel_size = load_elf(ipl->kernel, NULL, NULL, &pentry, NULL, | |
109 | NULL, 1, ELF_MACHINE, 0); | |
110 | if (kernel_size < 0) { | |
111 | kernel_size = load_image_targphys(ipl->kernel, 0, ram_size); | |
112 | } | |
113 | if (kernel_size < 0) { | |
114 | fprintf(stderr, "could not load kernel '%s'\n", ipl->kernel); | |
115 | return -1; | |
e674a49a | 116 | } |
f0180f91 FZ |
117 | /* |
118 | * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the | |
119 | * kernel parameters here as well. Note: For old kernels (up to 3.2) | |
120 | * we can not rely on the ELF entry point - it was 0x800 (the SALIPL | |
121 | * loader) and it won't work. For this case we force it to 0x10000, too. | |
122 | */ | |
123 | if (pentry == KERN_IMAGE_START || pentry == 0x800) { | |
124 | ipl->start_addr = KERN_IMAGE_START; | |
125 | /* Overwrite parameters in the kernel image, which are "rom" */ | |
126 | strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline); | |
127 | } else { | |
128 | ipl->start_addr = pentry; | |
e674a49a CB |
129 | } |
130 | ||
f0180f91 FZ |
131 | if (ipl->initrd) { |
132 | ram_addr_t initrd_offset; | |
133 | int initrd_size; | |
134 | ||
135 | initrd_offset = INITRD_START; | |
136 | while (kernel_size + 0x100000 > initrd_offset) { | |
137 | initrd_offset += 0x100000; | |
138 | } | |
139 | initrd_size = load_image_targphys(ipl->initrd, initrd_offset, | |
140 | ram_size - initrd_offset); | |
141 | if (initrd_size == -1) { | |
142 | fprintf(stderr, "qemu: could not load initrd '%s'\n", | |
143 | ipl->initrd); | |
144 | exit(1); | |
145 | } | |
e674a49a | 146 | |
f0180f91 FZ |
147 | /* |
148 | * we have to overwrite values in the kernel image, | |
149 | * which are "rom" | |
150 | */ | |
151 | stq_p(rom_ptr(INITRD_PARM_START), initrd_offset); | |
152 | stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size); | |
153 | } | |
154 | } | |
e674a49a CB |
155 | return 0; |
156 | } | |
157 | ||
158 | static Property s390_ipl_properties[] = { | |
159 | DEFINE_PROP_STRING("kernel", S390IPLState, kernel), | |
160 | DEFINE_PROP_STRING("initrd", S390IPLState, initrd), | |
161 | DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), | |
d0249ce5 | 162 | DEFINE_PROP_STRING("firmware", S390IPLState, firmware), |
f0180f91 | 163 | DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false), |
e674a49a CB |
164 | DEFINE_PROP_END_OF_LIST(), |
165 | }; | |
166 | ||
167 | static void s390_ipl_reset(DeviceState *dev) | |
168 | { | |
169 | S390IPLState *ipl = S390_IPL(dev); | |
2c4c71ee DD |
170 | S390CPU *cpu = S390_CPU(qemu_get_cpu(0)); |
171 | CPUS390XState *env = &cpu->env; | |
e674a49a | 172 | |
2c4c71ee DD |
173 | env->psw.addr = ipl->start_addr; |
174 | env->psw.mask = IPL_PSW_MASK; | |
ba1509c0 DD |
175 | |
176 | if (!ipl->kernel) { | |
5c8ded6e CB |
177 | /* Tell firmware, if there is a preferred boot device */ |
178 | env->regs[7] = -1; | |
ba1509c0 | 179 | DeviceState *dev_st = get_boot_device(0); |
5c8ded6e CB |
180 | if (dev_st) { |
181 | VirtioCcwDevice *ccw_dev = (VirtioCcwDevice *) object_dynamic_cast( | |
182 | OBJECT(qdev_get_parent_bus(dev_st)->parent), | |
183 | TYPE_VIRTIO_CCW_DEVICE); | |
184 | ||
185 | if (ccw_dev) { | |
186 | env->regs[7] = ccw_dev->sch->cssid << 24 | | |
187 | ccw_dev->sch->ssid << 16 | | |
188 | ccw_dev->sch->devno; | |
189 | } | |
ba1509c0 DD |
190 | } |
191 | } | |
192 | ||
eb24f7c6 | 193 | s390_cpu_set_state(CPU_STATE_OPERATING, cpu); |
e674a49a CB |
194 | } |
195 | ||
196 | static void s390_ipl_class_init(ObjectClass *klass, void *data) | |
197 | { | |
198 | DeviceClass *dc = DEVICE_CLASS(klass); | |
199 | SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); | |
200 | ||
201 | k->init = s390_ipl_init; | |
202 | dc->props = s390_ipl_properties; | |
203 | dc->reset = s390_ipl_reset; | |
e674a49a CB |
204 | } |
205 | ||
49973ebc | 206 | static const TypeInfo s390_ipl_info = { |
e674a49a CB |
207 | .class_init = s390_ipl_class_init, |
208 | .parent = TYPE_SYS_BUS_DEVICE, | |
209 | .name = "s390-ipl", | |
210 | .instance_size = sizeof(S390IPLState), | |
211 | }; | |
212 | ||
213 | static void s390_ipl_register_types(void) | |
214 | { | |
215 | type_register_static(&s390_ipl_info); | |
216 | } | |
217 | ||
218 | type_init(s390_ipl_register_types) |