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1 /*
2 * QEMU PC System Firmware
3 *
4 * Copyright (c) 2003-2004 Fabrice Bellard
5 * Copyright (c) 2011-2012 Intel Corporation
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25
26 #include "sysbus.h"
27 #include "hw.h"
28 #include "pc.h"
29 #include "hw/boards.h"
30 #include "loader.h"
31 #include "sysemu.h"
32 #include "flash.h"
33 #include "kvm.h"
34
35 #define BIOS_FILENAME "bios.bin"
36
37 typedef struct PcSysFwDevice {
38 SysBusDevice busdev;
39 uint8_t rom_only;
40 } PcSysFwDevice;
41
42 static void pc_isa_bios_init(MemoryRegion *rom_memory,
43 MemoryRegion *flash_mem,
44 int ram_size)
45 {
46 int isa_bios_size;
47 MemoryRegion *isa_bios;
48 uint64_t flash_size;
49 void *flash_ptr, *isa_bios_ptr;
50
51 flash_size = memory_region_size(flash_mem);
52
53 /* map the last 128KB of the BIOS in ISA space */
54 isa_bios_size = flash_size;
55 if (isa_bios_size > (128 * 1024)) {
56 isa_bios_size = 128 * 1024;
57 }
58 isa_bios = g_malloc(sizeof(*isa_bios));
59 memory_region_init_ram(isa_bios, "isa-bios", isa_bios_size);
60 vmstate_register_ram_global(isa_bios);
61 memory_region_add_subregion_overlap(rom_memory,
62 0x100000 - isa_bios_size,
63 isa_bios,
64 1);
65
66 /* copy ISA rom image from top of flash memory */
67 flash_ptr = memory_region_get_ram_ptr(flash_mem);
68 isa_bios_ptr = memory_region_get_ram_ptr(isa_bios);
69 memcpy(isa_bios_ptr,
70 ((uint8_t*)flash_ptr) + (flash_size - isa_bios_size),
71 isa_bios_size);
72
73 memory_region_set_readonly(isa_bios, true);
74 }
75
76 static void pc_fw_add_pflash_drv(void)
77 {
78 QemuOpts *opts;
79 QEMUMachine *machine;
80 char *filename;
81
82 if (bios_name == NULL) {
83 bios_name = BIOS_FILENAME;
84 }
85 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
86
87 opts = drive_add(IF_PFLASH, -1, filename, "readonly=on");
88
89 g_free(filename);
90
91 if (opts == NULL) {
92 return;
93 }
94
95 machine = find_default_machine();
96 if (machine == NULL) {
97 return;
98 }
99
100 drive_init(opts, machine->use_scsi);
101 }
102
103 static void pc_system_flash_init(MemoryRegion *rom_memory,
104 DriveInfo *pflash_drv)
105 {
106 BlockDriverState *bdrv;
107 int64_t size;
108 target_phys_addr_t phys_addr;
109 int sector_bits, sector_size;
110 pflash_t *system_flash;
111 MemoryRegion *flash_mem;
112
113 bdrv = pflash_drv->bdrv;
114 size = bdrv_getlength(pflash_drv->bdrv);
115 sector_bits = 12;
116 sector_size = 1 << sector_bits;
117
118 if ((size % sector_size) != 0) {
119 fprintf(stderr,
120 "qemu: PC system firmware (pflash) must be a multiple of 0x%x\n",
121 sector_size);
122 exit(1);
123 }
124
125 phys_addr = 0x100000000ULL - size;
126 system_flash = pflash_cfi01_register(phys_addr, NULL, "system.flash", size,
127 bdrv, sector_size, size >> sector_bits,
128 1, 0x0000, 0x0000, 0x0000, 0x0000, 0);
129 flash_mem = pflash_cfi01_get_memory(system_flash);
130
131 pc_isa_bios_init(rom_memory, flash_mem, size);
132 }
133
134 static void old_pc_system_rom_init(MemoryRegion *rom_memory)
135 {
136 char *filename;
137 MemoryRegion *bios, *isa_bios;
138 int bios_size, isa_bios_size;
139 int ret;
140
141 /* BIOS load */
142 if (bios_name == NULL) {
143 bios_name = BIOS_FILENAME;
144 }
145 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
146 if (filename) {
147 bios_size = get_image_size(filename);
148 } else {
149 bios_size = -1;
150 }
151 if (bios_size <= 0 ||
152 (bios_size % 65536) != 0) {
153 goto bios_error;
154 }
155 bios = g_malloc(sizeof(*bios));
156 memory_region_init_ram(bios, "pc.bios", bios_size);
157 vmstate_register_ram_global(bios);
158 memory_region_set_readonly(bios, true);
159 ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1);
160 if (ret != 0) {
161 bios_error:
162 fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", bios_name);
163 exit(1);
164 }
165 if (filename) {
166 g_free(filename);
167 }
168
169 /* map the last 128KB of the BIOS in ISA space */
170 isa_bios_size = bios_size;
171 if (isa_bios_size > (128 * 1024)) {
172 isa_bios_size = 128 * 1024;
173 }
174 isa_bios = g_malloc(sizeof(*isa_bios));
175 memory_region_init_alias(isa_bios, "isa-bios", bios,
176 bios_size - isa_bios_size, isa_bios_size);
177 memory_region_add_subregion_overlap(rom_memory,
178 0x100000 - isa_bios_size,
179 isa_bios,
180 1);
181 memory_region_set_readonly(isa_bios, true);
182
183 /* map all the bios at the top of memory */
184 memory_region_add_subregion(rom_memory,
185 (uint32_t)(-bios_size),
186 bios);
187 }
188
189 void pc_system_firmware_init(MemoryRegion *rom_memory)
190 {
191 DriveInfo *pflash_drv;
192 PcSysFwDevice *sysfw_dev;
193
194 sysfw_dev = (PcSysFwDevice*) qdev_create(NULL, "pc-sysfw");
195
196 qdev_init_nofail(DEVICE(sysfw_dev));
197
198 if (sysfw_dev->rom_only) {
199 old_pc_system_rom_init(rom_memory);
200 return;
201 }
202
203 pflash_drv = drive_get(IF_PFLASH, 0, 0);
204
205 /* Currently KVM cannot execute from device memory.
206 Use old rom based firmware initialization for KVM. */
207 if (kvm_enabled()) {
208 if (pflash_drv != NULL) {
209 fprintf(stderr, "qemu: pflash cannot be used with kvm enabled\n");
210 exit(1);
211 } else {
212 sysfw_dev->rom_only = 1;
213 old_pc_system_rom_init(rom_memory);
214 return;
215 }
216 }
217
218 /* If a pflash drive is not found, then create one using
219 the bios filename. */
220 if (pflash_drv == NULL) {
221 pc_fw_add_pflash_drv();
222 pflash_drv = drive_get(IF_PFLASH, 0, 0);
223 }
224
225 if (pflash_drv != NULL) {
226 pc_system_flash_init(rom_memory, pflash_drv);
227 } else {
228 fprintf(stderr, "qemu: PC system firmware (pflash) not available\n");
229 exit(1);
230 }
231 }
232
233 static Property pcsysfw_properties[] = {
234 DEFINE_PROP_UINT8("rom_only", PcSysFwDevice, rom_only, 0),
235 DEFINE_PROP_END_OF_LIST(),
236 };
237
238 static int pcsysfw_init(DeviceState *dev)
239 {
240 return 0;
241 }
242
243 static void pcsysfw_class_init (ObjectClass *klass, void *data)
244 {
245 DeviceClass *dc = DEVICE_CLASS (klass);
246
247 dc->desc = "PC System Firmware";
248 dc->init = pcsysfw_init;
249 dc->props = pcsysfw_properties;
250 }
251
252 static TypeInfo pcsysfw_info = {
253 .name = "pc-sysfw",
254 .parent = TYPE_SYS_BUS_DEVICE,
255 .instance_size = sizeof (PcSysFwDevice),
256 .class_init = pcsysfw_class_init,
257 };
258
259 static void pcsysfw_register (void)
260 {
261 type_register_static (&pcsysfw_info);
262 }
263
264 type_init (pcsysfw_register);
265