1,11 → 1,12 |
|
#include <linux/types.h> |
#include <linux/string.h> |
#include <linux/bug.h> |
#include <linux/init.h> |
#include <linux/module.h> |
#include <linux/ctype.h> |
#include <linux/dmi.h> |
#include <asm/unaligned.h> |
#include <syscall.h> |
struct kobject *dmi_kobj; |
|
static void *dmi_alloc(unsigned len) |
{ |
19,7 → 20,12 |
*/ |
static const char dmi_empty_string[] = " "; |
|
static u16 dmi_ver; |
static u32 dmi_ver __initdata; |
static u32 dmi_len; |
static u16 dmi_num; |
static u8 smbios_entry_point[32]; |
static int smbios_entry_point_size; |
|
/* |
* Catch too early calls to dmi_check_system(): |
*/ |
26,7 → 32,7 |
static int dmi_initialized; |
|
/* DMI system identification string used during boot */ |
static char dmi_ids_string[128]; |
static char dmi_ids_string[128] __initdata; |
|
static struct dmi_memdev_info { |
const char *device; |
80,7 → 86,7 |
* We have to be cautious here. We have seen BIOSes with DMI pointers |
* pointing to completely the wrong place for example |
*/ |
static void dmi_table(u8 *buf, int len, int num, |
static void dmi_decode_table(u8 *buf, |
void (*decode)(const struct dmi_header *, void *), |
void *private_data) |
{ |
88,10 → 94,13 |
int i = 0; |
|
/* |
* Stop when we see all the items the table claimed to have |
* OR we run off the end of the table (also happens) |
* Stop when we have seen all the items the table claimed to have |
* (SMBIOS < 3.0 only) OR we reach an end-of-table marker (SMBIOS |
* >= 3.0 only) OR we run off the end of the table (should never |
* happen but sometimes does on bogus implementations.) |
*/ |
while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) { |
while ((!dmi_num || i < dmi_num) && |
(data - buf + sizeof(struct dmi_header)) <= dmi_len) { |
const struct dmi_header *dm = (const struct dmi_header *)data; |
|
/* |
100,29 → 109,44 |
* table in dmi_decode or dmi_string |
*/ |
data += dm->length; |
while ((data - buf < len - 1) && (data[0] || data[1])) |
while ((data - buf < dmi_len - 1) && (data[0] || data[1])) |
data++; |
if (data - buf < len - 1) |
if (data - buf < dmi_len - 1) |
decode(dm, private_data); |
|
data += 2; |
i++; |
|
/* |
* 7.45 End-of-Table (Type 127) [SMBIOS reference spec v3.0.0] |
* For tables behind a 64-bit entry point, we have no item |
* count and no exact table length, so stop on end-of-table |
* marker. For tables behind a 32-bit entry point, we have |
* seen OEM structures behind the end-of-table marker on |
* some systems, so don't trust it. |
*/ |
if (!dmi_num && dm->type == DMI_ENTRY_END_OF_TABLE) |
break; |
} |
|
/* Trim DMI table length if needed */ |
if (dmi_len > data - buf) |
dmi_len = data - buf; |
} |
|
static u32 dmi_base; |
static u16 dmi_len; |
static u16 dmi_num; |
static phys_addr_t dmi_base; |
|
static int __init dmi_walk_early(void (*decode)(const struct dmi_header *, |
void *)) |
{ |
u8 *buf; |
u32 orig_dmi_len = dmi_len; |
|
buf = (u8*)MapIoMem(dmi_base, dmi_len, PG_SW); |
if (buf == NULL) |
return -1; |
|
dmi_table(buf, dmi_len, dmi_num, decode, NULL); |
dmi_decode_table(buf, decode, NULL); |
|
FreeKernelSpace(buf); |
|
192,7 → 216,7 |
* the UUID are supposed to be little-endian encoded. The specification |
* says that this is the defacto standard. |
*/ |
if (dmi_ver >= 0x0206) |
if (dmi_ver >= 0x020600) |
sprintf(s, "%pUL", d); |
else |
sprintf(s, "%pUB", d); |
329,7 → 353,13 |
dmi_save_dev_onboard(*(d+1), *(u16 *)(d+2), *(d+4), *(d+5), |
dmi_string_nosave(dm, *(d-1))); |
dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1))); |
} |
|
static void __init count_mem_devices(const struct dmi_header *dm, void *v) |
{ |
if (dm->type != DMI_ENTRY_MEM_DEVICE) |
return; |
dmi_memdev_nr++; |
} |
|
/* |
429,11 → 459,13 |
*/ |
static int __init dmi_present(const u8 *buf) |
{ |
int smbios_ver; |
u32 smbios_ver; |
|
if (memcmp(buf, "_SM_", 4) == 0 && |
buf[5] < 32 && dmi_checksum(buf, buf[5])) { |
smbios_ver = (buf[6] << 8) + buf[7]; |
smbios_ver = get_unaligned_be16(buf + 6); |
smbios_entry_point_size = buf[5]; |
memcpy(smbios_entry_point, buf, smbios_entry_point_size); |
|
/* Some BIOS report weird SMBIOS version, fix that up */ |
switch (smbios_ver) { |
455,21 → 487,25 |
buf += 16; |
|
if (memcmp(buf, "_DMI_", 5) == 0 && dmi_checksum(buf, 15)) { |
dmi_num = (buf[13] << 8) | buf[12]; |
dmi_len = (buf[7] << 8) | buf[6]; |
dmi_base = (buf[11] << 24) | (buf[10] << 16) | |
(buf[9] << 8) | buf[8]; |
if (smbios_ver) |
dmi_ver = smbios_ver; |
else |
dmi_ver = (buf[14] & 0xF0) << 4 | (buf[14] & 0x0F); |
dmi_ver <<= 8; |
dmi_num = get_unaligned_le16(buf + 12); |
dmi_len = get_unaligned_le16(buf + 6); |
dmi_base = get_unaligned_le32(buf + 8); |
|
if (dmi_walk_early(dmi_decode) == 0) { |
if (smbios_ver) { |
dmi_ver = smbios_ver; |
pr_info("SMBIOS %d.%d present.\n", |
dmi_ver >> 8, dmi_ver & 0xFF); |
dmi_ver >> 16, (dmi_ver >> 8) & 0xFF); |
} else { |
dmi_ver = (buf[14] & 0xF0) << 4 | |
(buf[14] & 0x0F); |
smbios_entry_point_size = 15; |
memcpy(smbios_entry_point, buf, |
smbios_entry_point_size); |
pr_info("Legacy DMI %d.%d present.\n", |
dmi_ver >> 8, dmi_ver & 0xFF); |
dmi_ver >> 16, (dmi_ver >> 8) & 0xFF); |
} |
dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string)); |
printk(KERN_DEBUG "DMI: %s\n", dmi_ids_string); |
480,6 → 516,33 |
return 1; |
} |
|
/* |
* Check for the SMBIOS 3.0 64-bit entry point signature. Unlike the legacy |
* 32-bit entry point, there is no embedded DMI header (_DMI_) in here. |
*/ |
static int __init dmi_smbios3_present(const u8 *buf) |
{ |
if (memcmp(buf, "_SM3_", 5) == 0 && |
buf[6] < 32 && dmi_checksum(buf, buf[6])) { |
dmi_ver = get_unaligned_be32(buf + 6) & 0xFFFFFF; |
dmi_num = 0; /* No longer specified */ |
dmi_len = get_unaligned_le32(buf + 12); |
dmi_base = get_unaligned_le64(buf + 16); |
smbios_entry_point_size = buf[6]; |
memcpy(smbios_entry_point, buf, smbios_entry_point_size); |
|
if (dmi_walk_early(dmi_decode) == 0) { |
pr_info("SMBIOS %d.%d.%d present.\n", |
dmi_ver >> 16, (dmi_ver >> 8) & 0xFF, |
dmi_ver & 0xFF); |
dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string)); |
pr_debug("DMI: %s\n", dmi_ids_string); |
return 0; |
} |
} |
return 1; |
} |
|
void __init dmi_scan_machine(void) |
{ |
char __iomem *p, *q; |
499,7 → 562,7 |
memset(buf, 0, 16); |
for (q = p; q < p + 0x10000; q += 16) { |
memcpy(buf + 16, q, 16); |
if (!dmi_present(buf)) { |
if (!dmi_smbios3_present(buf) || !dmi_present(buf)) { |
dmi_available = 1; |
goto out; |
} |