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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" | |
19 | ||
20 | #define KERN_IMAGE_START 0x010000UL | |
21 | #define KERN_PARM_AREA 0x010480UL | |
22 | #define INITRD_START 0x800000UL | |
23 | #define INITRD_PARM_START 0x010408UL | |
24 | #define INITRD_PARM_SIZE 0x010410UL | |
25 | #define PARMFILE_START 0x001000UL | |
26 | #define ZIPL_FILENAME "s390-zipl.rom" | |
27 | #define ZIPL_IMAGE_START 0x009000UL | |
28 | #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64) | |
29 | ||
30 | #define TYPE_S390_IPL "s390-ipl" | |
31 | #define S390_IPL(obj) \ | |
32 | OBJECT_CHECK(S390IPLState, (obj), TYPE_S390_IPL) | |
33 | #if 0 | |
34 | #define S390_IPL_CLASS(klass) \ | |
35 | OBJECT_CLASS_CHECK(S390IPLState, (klass), TYPE_S390_IPL) | |
36 | #define S390_IPL_GET_CLASS(obj) \ | |
37 | OBJECT_GET_CLASS(S390IPLState, (obj), TYPE_S390_IPL) | |
38 | #endif | |
39 | ||
40 | typedef struct S390IPLClass { | |
41 | /*< private >*/ | |
42 | SysBusDeviceClass parent_class; | |
43 | /*< public >*/ | |
44 | ||
45 | void (*parent_reset) (SysBusDevice *dev); | |
46 | } S390IPLClass; | |
47 | ||
48 | typedef struct S390IPLState { | |
49 | /*< private >*/ | |
50 | SysBusDevice parent_obj; | |
74ad2d22 | 51 | uint64_t start_addr; |
e674a49a | 52 | |
74ad2d22 | 53 | /*< public >*/ |
e674a49a CB |
54 | char *kernel; |
55 | char *initrd; | |
56 | char *cmdline; | |
57 | } S390IPLState; | |
58 | ||
59 | ||
60 | static void s390_ipl_cpu(uint64_t pswaddr) | |
61 | { | |
49e15878 AF |
62 | S390CPU *cpu = S390_CPU(qemu_get_cpu(0)); |
63 | CPUS390XState *env = &cpu->env; | |
64 | ||
e674a49a CB |
65 | env->psw.addr = pswaddr; |
66 | env->psw.mask = IPL_PSW_MASK; | |
49e15878 | 67 | s390_add_running_cpu(cpu); |
e674a49a CB |
68 | } |
69 | ||
70 | static int s390_ipl_init(SysBusDevice *dev) | |
71 | { | |
72 | S390IPLState *ipl = S390_IPL(dev); | |
73 | ram_addr_t kernel_size = 0; | |
74 | ||
75 | if (!ipl->kernel) { | |
76 | ram_addr_t bios_size = 0; | |
77 | char *bios_filename; | |
78 | ||
79 | /* Load zipl bootloader */ | |
80 | if (bios_name == NULL) { | |
81 | bios_name = ZIPL_FILENAME; | |
82 | } | |
83 | ||
84 | bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); | |
33259956 AG |
85 | bios_size = load_elf(bios_filename, NULL, NULL, &ipl->start_addr, NULL, |
86 | NULL, 1, ELF_MACHINE, 0); | |
87 | if (bios_size == -1UL) { | |
88 | bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, | |
89 | 4096); | |
90 | ipl->start_addr = ZIPL_IMAGE_START; | |
91 | if (bios_size > 4096) { | |
92 | hw_error("stage1 bootloader is > 4k\n"); | |
93 | } | |
94 | } | |
e674a49a CB |
95 | g_free(bios_filename); |
96 | ||
97 | if ((long)bios_size < 0) { | |
98 | hw_error("could not load bootloader '%s'\n", bios_name); | |
99 | } | |
e674a49a CB |
100 | return 0; |
101 | } else { | |
102 | kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL, NULL, | |
103 | NULL, 1, ELF_MACHINE, 0); | |
104 | if (kernel_size == -1UL) { | |
105 | kernel_size = load_image_targphys(ipl->kernel, 0, ram_size); | |
106 | } | |
107 | if (kernel_size == -1UL) { | |
108 | fprintf(stderr, "could not load kernel '%s'\n", ipl->kernel); | |
109 | return -1; | |
110 | } | |
111 | /* we have to overwrite values in the kernel image, which are "rom" */ | |
112 | strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline); | |
74ad2d22 AG |
113 | |
114 | /* | |
115 | * we can not rely on the ELF entry point, since up to 3.2 this | |
116 | * value was 0x800 (the SALIPL loader) and it wont work. For | |
117 | * all (Linux) cases 0x10000 (KERN_IMAGE_START) should be fine. | |
118 | */ | |
119 | ipl->start_addr = KERN_IMAGE_START; | |
e674a49a CB |
120 | } |
121 | if (ipl->initrd) { | |
122 | ram_addr_t initrd_offset, initrd_size; | |
123 | ||
124 | initrd_offset = INITRD_START; | |
125 | while (kernel_size + 0x100000 > initrd_offset) { | |
126 | initrd_offset += 0x100000; | |
127 | } | |
128 | initrd_size = load_image_targphys(ipl->initrd, initrd_offset, | |
129 | ram_size - initrd_offset); | |
130 | if (initrd_size == -1UL) { | |
131 | fprintf(stderr, "qemu: could not load initrd '%s'\n", ipl->initrd); | |
132 | exit(1); | |
133 | } | |
134 | ||
135 | /* we have to overwrite values in the kernel image, which are "rom" */ | |
136 | stq_p(rom_ptr(INITRD_PARM_START), initrd_offset); | |
137 | stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size); | |
138 | } | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | static Property s390_ipl_properties[] = { | |
144 | DEFINE_PROP_STRING("kernel", S390IPLState, kernel), | |
145 | DEFINE_PROP_STRING("initrd", S390IPLState, initrd), | |
146 | DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), | |
147 | DEFINE_PROP_END_OF_LIST(), | |
148 | }; | |
149 | ||
150 | static void s390_ipl_reset(DeviceState *dev) | |
151 | { | |
152 | S390IPLState *ipl = S390_IPL(dev); | |
153 | ||
74ad2d22 | 154 | s390_ipl_cpu(ipl->start_addr); |
e674a49a CB |
155 | } |
156 | ||
157 | static void s390_ipl_class_init(ObjectClass *klass, void *data) | |
158 | { | |
159 | DeviceClass *dc = DEVICE_CLASS(klass); | |
160 | SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); | |
161 | ||
162 | k->init = s390_ipl_init; | |
163 | dc->props = s390_ipl_properties; | |
164 | dc->reset = s390_ipl_reset; | |
165 | dc->no_user = 1; | |
166 | } | |
167 | ||
49973ebc | 168 | static const TypeInfo s390_ipl_info = { |
e674a49a CB |
169 | .class_init = s390_ipl_class_init, |
170 | .parent = TYPE_SYS_BUS_DEVICE, | |
171 | .name = "s390-ipl", | |
172 | .instance_size = sizeof(S390IPLState), | |
173 | }; | |
174 | ||
175 | static void s390_ipl_register_types(void) | |
176 | { | |
177 | type_register_static(&s390_ipl_info); | |
178 | } | |
179 | ||
180 | type_init(s390_ipl_register_types) |