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/** @file
API for SMBIOS table.
Copyright (c) 2005 - 2012, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "../UefiShellDebug1CommandsLib.h"
#include <Guid/SmBios.h>
#include "LibSmbiosView.h"
#include "SmbiosView.h"
STATIC UINT8 mInit = 0;
STATIC SMBIOS_TABLE_ENTRY_POINT *mSmbiosTable = NULL;
STATIC SMBIOS_STRUCTURE_POINTER m_SmbiosStruct;
STATIC SMBIOS_STRUCTURE_POINTER *mSmbiosStruct = &m_SmbiosStruct;
/**
Init the SMBIOS VIEW API's environment.
@retval EFI_SUCCESS Successful to init the SMBIOS VIEW Lib.
**/
EFI_STATUS
LibSmbiosInit (
VOID
)
{
EFI_STATUS Status;
//
// Init only once
//
if (mInit == 1) {
return EFI_SUCCESS;
}
//
// Get SMBIOS table from System Configure table
//
Status = GetSystemConfigurationTable (&gEfiSmbiosTableGuid, (VOID**)&mSmbiosTable);
if (mSmbiosTable == NULL) {
ShellPrintHiiEx(-1,-1,NULL,STRING_TOKEN (STR_SMBIOSVIEW_LIBSMBIOSVIEW_CANNOT_GET_TABLE), gShellDebug1HiiHandle);
return EFI_NOT_FOUND;
}
if (EFI_ERROR (Status)) {
ShellPrintHiiEx(-1,-1,NULL,STRING_TOKEN (STR_SMBIOSVIEW_LIBSMBIOSVIEW_GET_TABLE_ERROR), gShellDebug1HiiHandle, Status);
return Status;
}
//
// Init SMBIOS structure table address
//
mSmbiosStruct->Raw = (UINT8 *) (UINTN) (mSmbiosTable->TableAddress);
mInit = 1;
return EFI_SUCCESS;
}
/**
Cleanup the Smbios information.
**/
VOID
LibSmbiosCleanup (
VOID
)
{
//
// Release resources
//
if (mSmbiosTable != NULL) {
mSmbiosTable = NULL;
}
mInit = 0;
}
/**
Get the entry point structure for the table.
@param[out] EntryPointStructure The pointer to populate.
**/
VOID
LibSmbiosGetEPS (
OUT SMBIOS_TABLE_ENTRY_POINT **EntryPointStructure
)
{
//
// return SMBIOS Table address
//
*EntryPointStructure = mSmbiosTable;
}
/**
Return SMBIOS string for the given string number.
@param[in] Smbios Pointer to SMBIOS structure.
@param[in] StringNumber String number to return. -1 is used to skip all strings and
point to the next SMBIOS structure.
@return Pointer to string, or pointer to next SMBIOS strcuture if StringNumber == -1
**/
CHAR8*
LibGetSmbiosString (
IN SMBIOS_STRUCTURE_POINTER *Smbios,
IN UINT16 StringNumber
)
{
UINT16 Index;
CHAR8 *String;
ASSERT (Smbios != NULL);
//
// Skip over formatted section
//
String = (CHAR8 *) (Smbios->Raw + Smbios->Hdr->Length);
//
// Look through unformated section
//
for (Index = 1; Index <= StringNumber; Index++) {
if (StringNumber == Index) {
return String;
}
//
// Skip string
//
for (; *String != 0; String++);
String++;
if (*String == 0) {
//
// If double NULL then we are done.
// Return pointer to next structure in Smbios.
// if you pass in a -1 you will always get here
//
Smbios->Raw = (UINT8 *)++String;
return NULL;
}
}
return NULL;
}
/**
Get SMBIOS structure for the given Handle,
Handle is changed to the next handle or 0xFFFF when the end is
reached or the handle is not found.
@param[in, out] Handle 0xFFFF: get the first structure
Others: get a structure according to this value.
@param[out] Buffer The pointer to the pointer to the structure.
@param[out] Length Length of the structure.
@retval DMI_SUCCESS Handle is updated with next structure handle or
0xFFFF(end-of-list).
@retval DMI_INVALID_HANDLE Handle is updated with first structure handle or
0xFFFF(end-of-list).
**/
EFI_STATUS
LibGetSmbiosStructure (
IN OUT UINT16 *Handle,
OUT UINT8 **Buffer,
OUT UINT16 *Length
)
{
SMBIOS_STRUCTURE_POINTER Smbios;
SMBIOS_STRUCTURE_POINTER SmbiosEnd;
UINT8 *Raw;
if (*Handle == INVALID_HANDLE) {
*Handle = mSmbiosStruct->Hdr->Handle;
return DMI_INVALID_HANDLE;
}
if ((Buffer == NULL) || (Length == NULL)) {
ShellPrintHiiEx(-1,-1,NULL,STRING_TOKEN (STR_SMBIOSVIEW_LIBSMBIOSVIEW_NO_BUFF_LEN_SPEC), gShellDebug1HiiHandle);
return DMI_INVALID_HANDLE;
}
*Length = 0;
Smbios.Hdr = mSmbiosStruct->Hdr;
SmbiosEnd.Raw = Smbios.Raw + mSmbiosTable->TableLength;
while (Smbios.Raw < SmbiosEnd.Raw) {
if (Smbios.Hdr->Handle == *Handle) {
Raw = Smbios.Raw;
//
// Walk to next structure
//
LibGetSmbiosString (&Smbios, (UINT16) (-1));
//
// Length = Next structure head - this structure head
//
*Length = (UINT16) (Smbios.Raw - Raw);
*Buffer = Raw;
//
// update with the next structure handle.
//
if (Smbios.Raw < SmbiosEnd.Raw) {
*Handle = Smbios.Hdr->Handle;
} else {
*Handle = INVALID_HANDLE;
}
return DMI_SUCCESS;
}
//
// Walk to next structure
//
LibGetSmbiosString (&Smbios, (UINT16) (-1));
}
*Handle = INVALID_HANDLE;
return DMI_INVALID_HANDLE;
}
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