McfgParser.c

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#include <IndustryStandard/Acpi.h>
#include <Library/UefiLib.h>
#include "AcpiParser.h"
#include "AcpiTableParser.h"
 
// Local variables
STATIC ACPI_DESCRIPTION_HEADER_INFO  AcpiHdrInfo;
 
STATIC CONST ACPI_PARSER  McfgParser[] = {
  PARSE_ACPI_HEADER (&AcpiHdrInfo),
  { L"Reserved",                   8,36, L"0x%lx", NULL, NULL, NULL, NULL },
};
 
STATIC CONST ACPI_PARSER  PciCfgSpaceBaseAddrParser[] = {
  { L"Base Address",          8, 0,  L"0x%lx", NULL, NULL, NULL, NULL },
  { L"PCI Segment Group No.", 2, 8,  L"0x%x",  NULL, NULL, NULL, NULL },
  { L"Start Bus No.",         1, 10, L"0x%x",  NULL, NULL, NULL, NULL },
  { L"End Bus No.",           1, 11, L"0x%x",  NULL, NULL, NULL, NULL },
  { L"Reserved",              4, 12, L"0x%x",  NULL, NULL, NULL, NULL }
};
 
VOID
EFIAPI
ParseAcpiMcfg (
  IN BOOLEAN  Trace,
  IN UINT8    *Ptr,
  IN UINT32   AcpiTableLength,
  IN UINT8    AcpiTableRevision
  )
{
  UINT32  Offset;
  UINT32  PciCfgOffset;
  UINT8   *PciCfgSpacePtr;
 
  if (!Trace) {
    return;
  }
 
  Offset = ParseAcpi (
             TRUE,
             0,
             "MCFG",
             Ptr,
             AcpiTableLength,
             PARSER_PARAMS (McfgParser)
             );
 
  PciCfgSpacePtr = Ptr + Offset;
 
  while (Offset < AcpiTableLength) {
    PciCfgOffset = ParseAcpi (
                     TRUE,
                     2,
                     "PCI Configuration Space",
                     PciCfgSpacePtr,
                     (AcpiTableLength - Offset),
                     PARSER_PARAMS (PciCfgSpaceBaseAddrParser)
                     );
    PciCfgSpacePtr += PciCfgOffset;
    Offset         += PciCfgOffset;
  }
}