Step to UEFI (75） -----取得 ConfigurationTable

EFI_SYSTEM_TABLE 中定义了 EFI_CONFIGURATION_TABLE *ConfigurationTable;

这个结构体定义如下：

typedef struct{
EFI_GUID  VendorGuid;
VOID  *VendorTable;
} EFI_CONFIGURATION_TABLE;

 

整体看起来就是这样：

根据上面的原理可以编写程序枚举系统中的 ConfigurationTable，代码如下：

#include  <Uefi.h>
#include  <Library/UefiLib.h>
#include  <Library/ShellCEntryLib.h>


extern EFI_BOOT_SERVICES         *gBS;
extern EFI_SYSTEM_TABLE			 *gST;
extern EFI_RUNTIME_SERVICES 	 *gRT;

EFI_STATUS
PrintGuid (
  IN EFI_GUID *Guid
  )
  
/*++

Routine Description:

  This function prints a GUID to STDOUT.

Arguments:

  Guid    Pointer to a GUID to print.

Returns:

  EFI_SUCCESS             The GUID was printed.
  EFI_INVALID_PARAMETER   The input was NULL.

--*/
{
  if (Guid == NULL) {
	Print(L"Parameter error!\n");
    return EFI_INVALID_PARAMETER;
  }

  Print (
    L"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x\n",
    (unsigned) Guid->Data1,
    Guid->Data2,
    Guid->Data3,
    Guid->Data4[0],
    Guid->Data4[1],
    Guid->Data4[2],
    Guid->Data4[3],
    Guid->Data4[4],
    Guid->Data4[5],
    Guid->Data4[6],
    Guid->Data4[7]
    );
  return EFI_SUCCESS;
}

int
EFIAPI
main (
  IN int Argc,
  IN CHAR16 **Argv
  )
{
  UINTN 	i;
  EFI_STATUS	Status;
  EFI_CONFIGURATION_TABLE	*C=NULL;
  
  Print(L"[%d] Tables were found!\n",gST->NumberOfTableEntries);
  C=gST->ConfigurationTable;
  
  for (i=0;i<gST->NumberOfTableEntries-1;i++)
	{
		Status=PrintGuid(&C->VendorGuid);
		C++;
	}
  return EFI_SUCCESS;
}

 

然后我们尝试在模拟环境中运行，结果如下：

我们再看看找到的这些GUID是什么意思：

#define TIANO_CUSTOM_DECOMPRESS_GUID  \
  { 0xA31280AD, 0x481E, 0x41B6, { 0x95, 0xE8, 0x12, 0x7F, 0x4C, 0x98, 0x47, 0x79 } }

#define EFI_CRC32_GUIDED_SECTION_EXTRACTION_GUID \
  { 0xFC1BCDB0, 0x7D31, 0x49aa, {0x93, 0x6A, 0xA4, 0x60, 0x0D, 0x9D, 0xD0, 0x83 } }

#define DXE_SERVICES_TABLE_GUID \
  { \
    0x5ad34ba, 0x6f02, 0x4214, {0x95, 0x2e, 0x4d, 0xa0, 0x39, 0x8e, 0x2b, 0xb9 } \
}
#define HOB_LIST_GUID \
  { \
    0x7739f24c, 0x93d7, 0x11d4, {0x9a, 0x3a, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d } \
  }

#define EFI_MEMORY_TYPE_INFORMATION_GUID \
  { 0x4c19049f,0x4137,0x4dd3, { 0x9c,0x10,0x8b,0x97,0xa8,0x3f,0xfd,0xfa } }

#define EFI_DEBUG_IMAGE_INFO_TABLE_GUID \
  { \
    0x49152e77, 0x1ada, 0x4764, {0xb7, 0xa2, 0x7a, 0xfe, 0xfe, 0xd9, 0x5e, 0x8b } \
  }
#define SMBIOS_TABLE_GUID \
  { \
    0xeb9d2d31, 0x2d88, 0x11d3, {0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d } \
  }

 

能看懂的只有SMBIOS.......我们再用实体机测试，结果如下：

比上面的多了5个GUID，分别是：

#define LZMA_CUSTOM_DECOMPRESS_GUID  \
  { 0xEE4E5898, 0x3914, 0x4259, { 0x9D, 0x6E, 0xDC, 0x7B, 0xD7, 0x94, 0x03, 0xCF } }

#define EFI_TSC_FREQUENCY_GUID \
  { \
    0xdba6a7e3, 0xbb57, 0x4be7, { 0x8a, 0xf8, 0xd5, 0x78, 0xdb, 0x7e, 0x56, 0x87 } \
  }

#define ACPI_TABLE_GUID \
  { \
    0xeb9d2d30, 0x2d88, 0x11d3, {0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d } \
  }

#define EFI_ACPI_TABLE_GUID \
  { \
    0x8868e871, 0xe4f1, 0x11d3, {0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 } \
  }

gEfiOfflineCrashDumpTblGuid             = { 0x3804CF02, 0x8538, 0x11E2, { 0x88, 0x47, 0x8D, 0xF1, 0x60, 0x88, 0x70, 0x9B } }

 

本文完整代码下载：

GetATBL

下一次会介绍 Shell 下如何获取ACPI Table。