iPXE
Functions
bios_smbios.c File Reference

System Management BIOS. More...

#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <ipxe/uaccess.h>
#include <ipxe/smbios.h>
#include <realmode.h>
#include <pnpbios.h>

Go to the source code of this file.

Functions

 FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
 
static int bios_find_smbios2 (struct smbios *smbios)
 Find SMBIOS. More...
 
static int bios_find_smbios3 (struct smbios *smbios)
 Find SMBIOS. More...
 
static int bios_find_smbios (struct smbios *smbios)
 Find SMBIOS. More...
 
 PROVIDE_SMBIOS (pcbios, find_smbios, bios_find_smbios)
 

Detailed Description

System Management BIOS.

Definition in file bios_smbios.c.

Function Documentation

◆ FILE_LICENCE()

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL  )

◆ bios_find_smbios2()

static int bios_find_smbios2 ( struct smbios smbios)
static

Find SMBIOS.

Parameters
smbiosSMBIOS entry point descriptor structure to fill in
Return values
rcReturn status code

Definition at line 47 of file bios_smbios.c.

47  {
48  struct smbios_entry entry;
49  int rc;
50 
51  /* Scan through BIOS segment to find SMBIOS 32-bit entry point */
52  if ( ( rc = find_smbios_entry ( real_to_user ( BIOS_SEG, 0 ), 0x10000,
53  &entry ) ) != 0 )
54  return rc;
55 
56  /* Fill in entry point descriptor structure */
57  smbios->address = phys_to_user ( entry.smbios_address );
58  smbios->len = entry.smbios_len;
59  smbios->count = entry.smbios_count;
60  smbios->version = SMBIOS_VERSION ( entry.major, entry.minor );
61 
62  return 0;
63 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
unsigned int count
Number of SMBIOS structures.
Definition: smbios.h:214
size_t len
Length of SMBIOS structures.
Definition: smbios.h:212
userptr_t phys_to_user(unsigned long phys_addr)
Convert physical address to user pointer.
SMBIOS entry point descriptor.
Definition: smbios.h:208
uint16_t version
SMBIOS version.
Definition: smbios.h:216
int find_smbios_entry(userptr_t start, size_t len, struct smbios_entry *entry)
Scan for SMBIOS 32-bit entry point structure.
Definition: smbios.c:72
SMBIOS 32-bit entry point.
Definition: smbios.h:50
#define SMBIOS_VERSION(major, minor)
Calculate SMBIOS version.
Definition: smbios.h:226
userptr_t address
Start of SMBIOS structures.
Definition: smbios.h:210
static __always_inline userptr_t real_to_user(unsigned int segment, unsigned int offset)
Convert segment:offset address to user buffer.
Definition: realmode.h:75
#define BIOS_SEG
Definition: pnpbios.h:13

References smbios::address, BIOS_SEG, smbios::count, find_smbios_entry(), smbios::len, smbios_entry::major, smbios_entry::minor, phys_to_user(), rc, real_to_user(), smbios_entry::smbios_address, smbios_entry::smbios_count, smbios_entry::smbios_len, SMBIOS_VERSION, and smbios::version.

Referenced by bios_find_smbios().

◆ bios_find_smbios3()

static int bios_find_smbios3 ( struct smbios smbios)
static

Find SMBIOS.

Parameters
smbiosSMBIOS entry point descriptor structure to fill in
Return values
rcReturn status code

Definition at line 71 of file bios_smbios.c.

71  {
72  struct smbios3_entry entry;
73  int rc;
74 
75  /* Scan through BIOS segment to find SMBIOS 64-bit entry point */
76  if ( ( rc = find_smbios3_entry ( real_to_user ( BIOS_SEG, 0 ), 0x10000,
77  &entry ) ) != 0 )
78  return rc;
79 
80  /* Check that address is accessible */
81  if ( entry.smbios_address > ~( ( physaddr_t ) 0 ) ) {
82  DBG ( "SMBIOS3 at %08llx is inaccessible\n",
83  ( ( unsigned long long ) entry.smbios_address ) );
84  return -ENOTSUP;
85  }
86 
87  /* Fill in entry point descriptor structure */
88  smbios->address = phys_to_user ( entry.smbios_address );
89  smbios->len = entry.smbios_len;
90  smbios->count = 0;
91  smbios->version = SMBIOS_VERSION ( entry.major, entry.minor );
92 
93  return 0;
94 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
unsigned int count
Number of SMBIOS structures.
Definition: smbios.h:214
size_t len
Length of SMBIOS structures.
Definition: smbios.h:212
userptr_t phys_to_user(unsigned long phys_addr)
Convert physical address to user pointer.
SMBIOS entry point descriptor.
Definition: smbios.h:208
uint16_t version
SMBIOS version.
Definition: smbios.h:216
#define ENOTSUP
Operation not supported.
Definition: errno.h:589
#define SMBIOS_VERSION(major, minor)
Calculate SMBIOS version.
Definition: smbios.h:226
unsigned long physaddr_t
Definition: stdint.h:20
int find_smbios3_entry(userptr_t start, size_t len, struct smbios3_entry *entry)
Scan for SMBIOS 64-bit entry point structure.
Definition: smbios.c:112
userptr_t address
Start of SMBIOS structures.
Definition: smbios.h:210
static __always_inline userptr_t real_to_user(unsigned int segment, unsigned int offset)
Convert segment:offset address to user buffer.
Definition: realmode.h:75
#define DBG(...)
Print a debugging message.
Definition: compiler.h:498
#define BIOS_SEG
Definition: pnpbios.h:13
SMBIOS 64-bit entry point.
Definition: smbios.h:91

References smbios::address, BIOS_SEG, smbios::count, DBG, ENOTSUP, find_smbios3_entry(), smbios::len, smbios3_entry::major, smbios3_entry::minor, phys_to_user(), rc, real_to_user(), smbios3_entry::smbios_address, smbios3_entry::smbios_len, SMBIOS_VERSION, and smbios::version.

Referenced by bios_find_smbios().

◆ bios_find_smbios()

static int bios_find_smbios ( struct smbios smbios)
static

Find SMBIOS.

Parameters
smbiosSMBIOS entry point descriptor structure to fill in
Return values
rcReturn status code

Definition at line 102 of file bios_smbios.c.

102  {
103  int rc;
104 
105  /* Use 32-bit table if present */
106  if ( ( rc = bios_find_smbios2 ( smbios ) ) == 0 )
107  return 0;
108 
109  /* Otherwise, use 64-bit table if present and accessible */
110  if ( ( rc = bios_find_smbios3 ( smbios ) ) == 0 )
111  return 0;
112 
113  return rc;
114 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
SMBIOS entry point descriptor.
Definition: smbios.h:208
static int bios_find_smbios2(struct smbios *smbios)
Find SMBIOS.
Definition: bios_smbios.c:47
static int bios_find_smbios3(struct smbios *smbios)
Find SMBIOS.
Definition: bios_smbios.c:71

References bios_find_smbios2(), bios_find_smbios3(), and rc.

◆ PROVIDE_SMBIOS()

PROVIDE_SMBIOS ( pcbios  ,
find_smbios  ,
bios_find_smbios   
)