1 #include <linux/types.h>
2 #include <linux/kernel.h>
3 #include <linux/string.h>
4 #include <linux/init.h>
5 #include <linux/module.h>
6 #include <linux/slab.h>
7 #include <linux/acpi.h>
10 #include <asm/system.h>
11 #include <linux/dmi.h>
12 #include <linux/bootmem.h>
25 #define dmi_printk(x) printk x
30 static char * __init dmi_string(struct dmi_header *dm, u8 s)
47 * We have to be cautious here. We have seen BIOSes with DMI pointers
48 * pointing to completely the wrong place for example
51 static int __init dmi_table(u32 base, int len, int num, void (*decode)(struct dmi_header *))
54 struct dmi_header *dm;
58 buf = bt_ioremap(base, len);
65 * Stop when we see all the items the table claimed to have
66 * OR we run off the end of the table (also happens)
69 while(i<num && data-buf+sizeof(struct dmi_header)<=len)
71 dm=(struct dmi_header *)data;
73 * We want to know the total length (formated area and strings)
74 * before decoding to make sure we won't run off the table in
75 * dmi_decode or dmi_string
78 while(data-buf<len-1 && (data[0] || data[1]))
90 inline static int __init dmi_checksum(u8 *buf)
100 static int __init dmi_iterate(void (*decode)(struct dmi_header *))
106 * no iounmap() for that ioremap(); it would be a no-op, but it's
107 * so early in setup that sucker gets confused into doing what
108 * it shouldn't if we actually call it.
110 p = ioremap(0xF0000, 0x10000);
113 for (q = p; q < p + 0x10000; q += 16) {
114 memcpy_fromio(buf, q, 15);
115 if(memcmp(buf, "_DMI_", 5)==0 && dmi_checksum(buf))
117 u16 num=buf[13]<<8|buf[12];
118 u16 len=buf[7]<<8|buf[6];
119 u32 base=buf[11]<<24|buf[10]<<16|buf[9]<<8|buf[8];
122 * DMI version 0.0 means that the real version is taken from
123 * the SMBIOS version, which we don't know at this point.
126 printk(KERN_INFO "DMI %d.%d present.\n",
127 buf[14]>>4, buf[14]&0x0F);
129 printk(KERN_INFO "DMI present.\n");
130 dmi_printk((KERN_INFO "%d structures occupying %d bytes.\n",
132 dmi_printk((KERN_INFO "DMI table at 0x%08X.\n",
134 if(dmi_table(base,len, num, decode)==0)
141 static char *dmi_ident[DMI_STRING_MAX];
147 static void __init dmi_save_ident(struct dmi_header *dm, int slot, int string)
150 char *p = dmi_string(dm, d[string]);
151 if(p==NULL || *p == 0)
155 dmi_ident[slot] = alloc_bootmem(strlen(p)+1);
157 strcpy(dmi_ident[slot], p);
159 printk(KERN_ERR "dmi_save_ident: out of memory.\n");
163 * Process a DMI table entry. Right now all we care about are the BIOS
164 * and machine entries. For 2.5 we should pull the smbus controller info
167 static void __init dmi_decode(struct dmi_header *dm)
176 dmi_printk(("BIOS Vendor: %s\n",
177 dmi_string(dm, data[4])));
178 dmi_save_ident(dm, DMI_BIOS_VENDOR, 4);
179 dmi_printk(("BIOS Version: %s\n",
180 dmi_string(dm, data[5])));
181 dmi_save_ident(dm, DMI_BIOS_VERSION, 5);
182 dmi_printk(("BIOS Release: %s\n",
183 dmi_string(dm, data[8])));
184 dmi_save_ident(dm, DMI_BIOS_DATE, 8);
187 dmi_printk(("System Vendor: %s\n",
188 dmi_string(dm, data[4])));
189 dmi_save_ident(dm, DMI_SYS_VENDOR, 4);
190 dmi_printk(("Product Name: %s\n",
191 dmi_string(dm, data[5])));
192 dmi_save_ident(dm, DMI_PRODUCT_NAME, 5);
193 dmi_printk(("Version: %s\n",
194 dmi_string(dm, data[6])));
195 dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
196 dmi_printk(("Serial Number: %s\n",
197 dmi_string(dm, data[7])));
198 dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7);
201 dmi_printk(("Board Vendor: %s\n",
202 dmi_string(dm, data[4])));
203 dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);
204 dmi_printk(("Board Name: %s\n",
205 dmi_string(dm, data[5])));
206 dmi_save_ident(dm, DMI_BOARD_NAME, 5);
207 dmi_printk(("Board Version: %s\n",
208 dmi_string(dm, data[6])));
209 dmi_save_ident(dm, DMI_BOARD_VERSION, 6);
214 void __init dmi_scan_machine(void)
216 if (dmi_iterate(dmi_decode))
217 printk(KERN_INFO "DMI not present.\n");
222 * dmi_check_system - check system DMI data
223 * @list: array of dmi_system_id structures to match against
225 * Walk the blacklist table running matching functions until someone
226 * returns non zero or we hit the end. Callback function is called for
227 * each successfull match. Returns the number of matches.
229 int dmi_check_system(struct dmi_system_id *list)
232 struct dmi_system_id *d = list;
235 for (i = 0; i < ARRAY_SIZE(d->matches); i++) {
236 int s = d->matches[i].slot;
239 if (dmi_ident[s] && strstr(dmi_ident[s], d->matches[i].substr))
244 if (d->callback && d->callback(d))
252 EXPORT_SYMBOL(dmi_check_system);
255 * dmi_get_system_info - return DMI data value
256 * @field: data index (see enum dmi_filed)
258 * Returns one DMI data value, can be used to perform
259 * complex DMI data checks.
261 char *dmi_get_system_info(int field)
263 return dmi_ident[field];
265 EXPORT_SYMBOL(dmi_get_system_info);