1 #include <linux/types.h>
2 #include <linux/string.h>
3 #include <linux/init.h>
4 #include <linux/module.h>
6 #include <linux/bootmem.h>
18 #define dmi_printk(x) printk x
23 static char * __init dmi_string(struct dmi_header *dm, u8 s)
25 u8 *bp = ((u8 *) dm) + dm->length;
30 while (s > 0 && *bp) {
38 * We have to be cautious here. We have seen BIOSes with DMI pointers
39 * pointing to completely the wrong place for example
41 static int __init dmi_table(u32 base, int len, int num,
42 void (*decode)(struct dmi_header *))
47 buf = bt_ioremap(base, len);
54 * Stop when we see all the items the table claimed to have
55 * OR we run off the end of the table (also happens)
57 while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) {
58 struct dmi_header *dm = (struct dmi_header *)data;
60 * We want to know the total length (formated area and strings)
61 * before decoding to make sure we won't run off the table in
62 * dmi_decode or dmi_string
65 while ((data - buf < len - 1) && (data[0] || data[1]))
67 if (data - buf < len - 1)
76 static int __init dmi_checksum(u8 *buf)
81 for (a = 0; a < 15; a++)
87 static char *dmi_ident[DMI_STRING_MAX];
92 static void __init dmi_save_ident(struct dmi_header *dm, int slot, int string)
95 char *p = dmi_string(dm, d[string]);
97 if (p == NULL || *p == 0)
102 dmi_ident[slot] = alloc_bootmem(strlen(p) + 1);
104 strcpy(dmi_ident[slot], p);
106 printk(KERN_ERR "dmi_save_ident: out of memory.\n");
110 * Process a DMI table entry. Right now all we care about are the BIOS
111 * and machine entries. For 2.5 we should pull the smbus controller info
114 static void __init dmi_decode(struct dmi_header *dm)
116 u8 *data __attribute__((__unused__)) = (u8 *)dm;
120 dmi_printk(("BIOS Vendor: %s\n", dmi_string(dm, data[4])));
121 dmi_save_ident(dm, DMI_BIOS_VENDOR, 4);
122 dmi_printk(("BIOS Version: %s\n", dmi_string(dm, data[5])));
123 dmi_save_ident(dm, DMI_BIOS_VERSION, 5);
124 dmi_printk(("BIOS Release: %s\n", dmi_string(dm, data[8])));
125 dmi_save_ident(dm, DMI_BIOS_DATE, 8);
128 dmi_printk(("System Vendor: %s\n", dmi_string(dm, data[4])));
129 dmi_save_ident(dm, DMI_SYS_VENDOR, 4);
130 dmi_printk(("Product Name: %s\n", dmi_string(dm, data[5])));
131 dmi_save_ident(dm, DMI_PRODUCT_NAME, 5);
132 dmi_printk(("Version: %s\n", dmi_string(dm, data[6])));
133 dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
134 dmi_printk(("Serial Number: %s\n", dmi_string(dm, data[7])));
135 dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7);
138 dmi_printk(("Board Vendor: %s\n", dmi_string(dm, data[4])));
139 dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);
140 dmi_printk(("Board Name: %s\n", dmi_string(dm, data[5])));
141 dmi_save_ident(dm, DMI_BOARD_NAME, 5);
142 dmi_printk(("Board Version: %s\n", dmi_string(dm, data[6])));
143 dmi_save_ident(dm, DMI_BOARD_VERSION, 6);
148 void __init dmi_scan_machine(void)
154 * no iounmap() for that ioremap(); it would be a no-op, but it's
155 * so early in setup that sucker gets confused into doing what
156 * it shouldn't if we actually call it.
158 p = ioremap(0xF0000, 0x10000);
162 for (q = p; q < p + 0x10000; q += 16) {
163 memcpy_fromio(buf, q, 15);
164 if ((memcmp(buf, "_DMI_", 5) == 0) && dmi_checksum(buf)) {
165 u16 num = (buf[13] << 8) | buf[12];
166 u16 len = (buf[7] << 8) | buf[6];
167 u32 base = (buf[11] << 24) | (buf[10] << 16) |
168 (buf[9] << 8) | buf[8];
171 * DMI version 0.0 means that the real version is taken from
172 * the SMBIOS version, which we don't know at this point.
175 printk(KERN_INFO "DMI %d.%d present.\n",
176 buf[14] >> 4, buf[14] & 0xF);
178 printk(KERN_INFO "DMI present.\n");
180 dmi_printk((KERN_INFO "%d structures occupying %d bytes.\n",
182 dmi_printk((KERN_INFO "DMI table at 0x%08X.\n", base));
184 if (dmi_table(base,len, num, dmi_decode) == 0)
189 out: printk(KERN_INFO "DMI not present.\n");
194 * dmi_check_system - check system DMI data
195 * @list: array of dmi_system_id structures to match against
197 * Walk the blacklist table running matching functions until someone
198 * returns non zero or we hit the end. Callback function is called for
199 * each successfull match. Returns the number of matches.
201 int dmi_check_system(struct dmi_system_id *list)
204 struct dmi_system_id *d = list;
207 for (i = 0; i < ARRAY_SIZE(d->matches); i++) {
208 int s = d->matches[i].slot;
211 if (dmi_ident[s] && strstr(dmi_ident[s], d->matches[i].substr))
216 if (d->callback && d->callback(d))
224 EXPORT_SYMBOL(dmi_check_system);
227 * dmi_get_system_info - return DMI data value
228 * @field: data index (see enum dmi_filed)
230 * Returns one DMI data value, can be used to perform
231 * complex DMI data checks.
233 char *dmi_get_system_info(int field)
235 return dmi_ident[field];
237 EXPORT_SYMBOL(dmi_get_system_info);