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1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
4  *
5  * Adapted from coreboot src/arch/x86/smbios.c
6  */
7 
8 #include <common.h>
9 #include <smbios.h>
10 #include <tables_csum.h>
11 #include <version.h>
12 #ifdef CONFIG_CPU
13 #include <cpu.h>
14 #include <dm.h>
15 #include <dm/uclass-internal.h>
16 #endif
17 
18 /**
19  * smbios_add_string() - add a string to the string area
20  *
21  * This adds a string to the string area which is appended directly after
22  * the formatted portion of an SMBIOS structure.
23  *
24  * @start:	string area start address
25  * @str:	string to add
26  * @return:	string number in the string area
27  */
smbios_add_string(char * start,const char * str)28 static int smbios_add_string(char *start, const char *str)
29 {
30 	int i = 1;
31 	char *p = start;
32 
33 	for (;;) {
34 		if (!*p) {
35 			strcpy(p, str);
36 			p += strlen(str);
37 			*p++ = '\0';
38 			*p++ = '\0';
39 
40 			return i;
41 		}
42 
43 		if (!strcmp(p, str))
44 			return i;
45 
46 		p += strlen(p) + 1;
47 		i++;
48 	}
49 }
50 
51 /**
52  * smbios_string_table_len() - compute the string area size
53  *
54  * This computes the size of the string area including the string terminator.
55  *
56  * @start:	string area start address
57  * @return:	string area size
58  */
smbios_string_table_len(char * start)59 static int smbios_string_table_len(char *start)
60 {
61 	char *p = start;
62 	int i, len = 0;
63 
64 	while (*p) {
65 		i = strlen(p) + 1;
66 		p += i;
67 		len += i;
68 	}
69 
70 	return len + 1;
71 }
72 
smbios_write_type0(ulong * current,int handle)73 static int smbios_write_type0(ulong *current, int handle)
74 {
75 	struct smbios_type0 *t = (struct smbios_type0 *)*current;
76 	int len = sizeof(struct smbios_type0);
77 
78 	memset(t, 0, sizeof(struct smbios_type0));
79 	fill_smbios_header(t, SMBIOS_BIOS_INFORMATION, len, handle);
80 	t->vendor = smbios_add_string(t->eos, "U-Boot");
81 	t->bios_ver = smbios_add_string(t->eos, PLAIN_VERSION);
82 	t->bios_release_date = smbios_add_string(t->eos, U_BOOT_DMI_DATE);
83 #ifdef CONFIG_ROM_SIZE
84 	t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1;
85 #endif
86 	t->bios_characteristics = BIOS_CHARACTERISTICS_PCI_SUPPORTED |
87 				  BIOS_CHARACTERISTICS_SELECTABLE_BOOT |
88 				  BIOS_CHARACTERISTICS_UPGRADEABLE;
89 #ifdef CONFIG_GENERATE_ACPI_TABLE
90 	t->bios_characteristics_ext1 = BIOS_CHARACTERISTICS_EXT1_ACPI;
91 #endif
92 #ifdef CONFIG_EFI_LOADER
93 	t->bios_characteristics_ext1 |= BIOS_CHARACTERISTICS_EXT1_UEFI;
94 #endif
95 	t->bios_characteristics_ext2 = BIOS_CHARACTERISTICS_EXT2_TARGET;
96 
97 	t->bios_major_release = 0xff;
98 	t->bios_minor_release = 0xff;
99 	t->ec_major_release = 0xff;
100 	t->ec_minor_release = 0xff;
101 
102 	len = t->length + smbios_string_table_len(t->eos);
103 	*current += len;
104 
105 	return len;
106 }
107 
smbios_write_type1(ulong * current,int handle)108 static int smbios_write_type1(ulong *current, int handle)
109 {
110 	struct smbios_type1 *t = (struct smbios_type1 *)*current;
111 	int len = sizeof(struct smbios_type1);
112 	char *serial_str = env_get("serial#");
113 
114 	memset(t, 0, sizeof(struct smbios_type1));
115 	fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle);
116 	t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER);
117 	t->product_name = smbios_add_string(t->eos, CONFIG_SMBIOS_PRODUCT_NAME);
118 	if (serial_str) {
119 		strncpy((char*)t->uuid, serial_str, sizeof(t->uuid));
120 		t->serial_number = smbios_add_string(t->eos, serial_str);
121 	}
122 
123 	len = t->length + smbios_string_table_len(t->eos);
124 	*current += len;
125 
126 	return len;
127 }
128 
smbios_write_type2(ulong * current,int handle)129 static int smbios_write_type2(ulong *current, int handle)
130 {
131 	struct smbios_type2 *t = (struct smbios_type2 *)*current;
132 	int len = sizeof(struct smbios_type2);
133 
134 	memset(t, 0, sizeof(struct smbios_type2));
135 	fill_smbios_header(t, SMBIOS_BOARD_INFORMATION, len, handle);
136 	t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER);
137 	t->product_name = smbios_add_string(t->eos, CONFIG_SMBIOS_PRODUCT_NAME);
138 	t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING;
139 	t->board_type = SMBIOS_BOARD_MOTHERBOARD;
140 
141 	len = t->length + smbios_string_table_len(t->eos);
142 	*current += len;
143 
144 	return len;
145 }
146 
smbios_write_type3(ulong * current,int handle)147 static int smbios_write_type3(ulong *current, int handle)
148 {
149 	struct smbios_type3 *t = (struct smbios_type3 *)*current;
150 	int len = sizeof(struct smbios_type3);
151 
152 	memset(t, 0, sizeof(struct smbios_type3));
153 	fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle);
154 	t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER);
155 	t->chassis_type = SMBIOS_ENCLOSURE_DESKTOP;
156 	t->bootup_state = SMBIOS_STATE_SAFE;
157 	t->power_supply_state = SMBIOS_STATE_SAFE;
158 	t->thermal_state = SMBIOS_STATE_SAFE;
159 	t->security_status = SMBIOS_SECURITY_NONE;
160 
161 	len = t->length + smbios_string_table_len(t->eos);
162 	*current += len;
163 
164 	return len;
165 }
166 
smbios_write_type4_dm(struct smbios_type4 * t)167 static void smbios_write_type4_dm(struct smbios_type4 *t)
168 {
169 	u16 processor_family = SMBIOS_PROCESSOR_FAMILY_UNKNOWN;
170 	const char *vendor = "Unknown";
171 	const char *name = "Unknown";
172 
173 #ifdef CONFIG_CPU
174 	char processor_name[49];
175 	char vendor_name[49];
176 	struct udevice *dev = NULL;
177 
178 	uclass_find_first_device(UCLASS_CPU, &dev);
179 	if (dev) {
180 		struct cpu_platdata *plat = dev_get_parent_platdata(dev);
181 
182 		if (plat->family)
183 			processor_family = plat->family;
184 		t->processor_id[0] = plat->id[0];
185 		t->processor_id[1] = plat->id[1];
186 
187 		if (!cpu_get_vendor(dev, vendor_name, sizeof(vendor_name)))
188 			vendor = vendor_name;
189 		if (!cpu_get_desc(dev, processor_name, sizeof(processor_name)))
190 			name = processor_name;
191 	}
192 #endif
193 
194 	t->processor_family = processor_family;
195 	t->processor_manufacturer = smbios_add_string(t->eos, vendor);
196 	t->processor_version = smbios_add_string(t->eos, name);
197 }
198 
smbios_write_type4(ulong * current,int handle)199 static int smbios_write_type4(ulong *current, int handle)
200 {
201 	struct smbios_type4 *t = (struct smbios_type4 *)*current;
202 	int len = sizeof(struct smbios_type4);
203 
204 	memset(t, 0, sizeof(struct smbios_type4));
205 	fill_smbios_header(t, SMBIOS_PROCESSOR_INFORMATION, len, handle);
206 	t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL;
207 	smbios_write_type4_dm(t);
208 	t->status = SMBIOS_PROCESSOR_STATUS_ENABLED;
209 	t->processor_upgrade = SMBIOS_PROCESSOR_UPGRADE_NONE;
210 	t->l1_cache_handle = 0xffff;
211 	t->l2_cache_handle = 0xffff;
212 	t->l3_cache_handle = 0xffff;
213 	t->processor_family2 = t->processor_family;
214 
215 	len = t->length + smbios_string_table_len(t->eos);
216 	*current += len;
217 
218 	return len;
219 }
220 
smbios_write_type32(ulong * current,int handle)221 static int smbios_write_type32(ulong *current, int handle)
222 {
223 	struct smbios_type32 *t = (struct smbios_type32 *)*current;
224 	int len = sizeof(struct smbios_type32);
225 
226 	memset(t, 0, sizeof(struct smbios_type32));
227 	fill_smbios_header(t, SMBIOS_SYSTEM_BOOT_INFORMATION, len, handle);
228 
229 	*current += len;
230 
231 	return len;
232 }
233 
smbios_write_type127(ulong * current,int handle)234 static int smbios_write_type127(ulong *current, int handle)
235 {
236 	struct smbios_type127 *t = (struct smbios_type127 *)*current;
237 	int len = sizeof(struct smbios_type127);
238 
239 	memset(t, 0, sizeof(struct smbios_type127));
240 	fill_smbios_header(t, SMBIOS_END_OF_TABLE, len, handle);
241 
242 	*current += len;
243 
244 	return len;
245 }
246 
247 static smbios_write_type smbios_write_funcs[] = {
248 	smbios_write_type0,
249 	smbios_write_type1,
250 	smbios_write_type2,
251 	smbios_write_type3,
252 	smbios_write_type4,
253 	smbios_write_type32,
254 	smbios_write_type127
255 };
256 
write_smbios_table(ulong addr)257 ulong write_smbios_table(ulong addr)
258 {
259 	struct smbios_entry *se;
260 	ulong tables;
261 	int len = 0;
262 	int max_struct_size = 0;
263 	int handle = 0;
264 	char *istart;
265 	int isize;
266 	int i;
267 
268 	/* 16 byte align the table address */
269 	addr = ALIGN(addr, 16);
270 
271 	se = (struct smbios_entry *)(uintptr_t)addr;
272 	memset(se, 0, sizeof(struct smbios_entry));
273 
274 	addr += sizeof(struct smbios_entry);
275 	addr = ALIGN(addr, 16);
276 	tables = addr;
277 
278 	/* populate minimum required tables */
279 	for (i = 0; i < ARRAY_SIZE(smbios_write_funcs); i++) {
280 		int tmp = smbios_write_funcs[i]((ulong *)&addr, handle++);
281 		max_struct_size = max(max_struct_size, tmp);
282 		len += tmp;
283 	}
284 
285 	memcpy(se->anchor, "_SM_", 4);
286 	se->length = sizeof(struct smbios_entry);
287 	se->major_ver = SMBIOS_MAJOR_VER;
288 	se->minor_ver = SMBIOS_MINOR_VER;
289 	se->max_struct_size = max_struct_size;
290 	memcpy(se->intermediate_anchor, "_DMI_", 5);
291 	se->struct_table_length = len;
292 	se->struct_table_address = tables;
293 	se->struct_count = handle;
294 
295 	/* calculate checksums */
296 	istart = (char *)se + SMBIOS_INTERMEDIATE_OFFSET;
297 	isize = sizeof(struct smbios_entry) - SMBIOS_INTERMEDIATE_OFFSET;
298 	se->intermediate_checksum = table_compute_checksum(istart, isize);
299 	se->checksum = table_compute_checksum(se, sizeof(struct smbios_entry));
300 
301 	return addr;
302 }
303