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stand: Parse BIOS revision from SMBIOS

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Add a smbios.bios.revision kenv, which contains the system BIOS revision
as defined in SMBIOS specification, section 3.3.1.
Since the revision is stored in two separate byte fields,
the smbios_setenv helper can't be used.
Read and construct the kenv manually instead.

Approved by:	mw(mentor)
Sponsored by:	Stormshield
Obtained from:	Semihalf
Differential Revision:	https://reviews.freebsd.org/D36413
This commit is contained in:
Kornel Dulęba 2022-09-02 13:08:32 +02:00
parent e23ad9c4ba
commit 66c73af7ea
1 changed files with 9 additions and 0 deletions
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9
stand/libsa/smbios.c
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@ -298,6 +298,8 @@ smbios_parse_table(const caddr_t addr)
{
caddr_t cp;
int proc, size, osize, type;
uint8_t bios_minor, bios_major;
char buf[16];
type = SMBIOS_GET8(addr, 0); /* 3.1.2 Structure Header Format */
switch(type) {
@ -305,6 +307,13 @@ smbios_parse_table(const caddr_t addr)
smbios_setenv("smbios.bios.vendor", addr, 0x04);
smbios_setenv("smbios.bios.version", addr, 0x05);
smbios_setenv("smbios.bios.reldate", addr, 0x08);
bios_major = SMBIOS_GET8(addr, 0x14);
bios_minor = SMBIOS_GET8(addr, 0x15);
if (bios_minor != 0xFF && bios_major != 0xFF) {
snprintf(buf, sizeof(buf), "%u.%u",
bios_major, bios_minor);
setenv("smbios.bios.revision", buf, 1);
}
break;
case 1: /* 3.3.2 System Information (Type 1) */