Function FIXLPCB

rEFIt_UEFI/Platform/FixBiosDsdt.cpp:2404–2489

UINT8 dataLPC[] = {0x18, 0x3A, 0x00, 0x00};

UINT32 FIXLPCB (UINT8 *dsdt, UINT32 len)
{
  UINT32 i, j, k;
  INT32 sizeoffset, shift = 0, Size;
  UINT32  LPCBADR = 0, LPCBSIZE = 0, LPCBADR1 = 0;
  AML_CHUNK* root;
  AML_CHUNK* met;
  AML_CHUNK* pack;
  CHAR8 *lpcb;
  CHAR8 NameCard[32];


  DBG("Start LPCB Fix\n");
  //DBG("len = 0x%08X\n", len);
  //have to find LPC
  for (j=0x20; len >= 10 && j < len - 10; j++) {
    if (CmpAdr(dsdt, j, 0x001F0000))
    {
      LPCBADR = devFind(dsdt, j);
      if (!LPCBADR) {
        continue;
      }
      LPCBSIZE = get_size(dsdt, LPCBADR);
      device_name[3] = (__typeof_am__(device_name[3]))AllocateZeroPool(5);
      CopyMem(device_name[3], dsdt + j, 4);
      MsgLog("found LPCB device NAME(_ADR,0x001F0000) at %X And Name is %s\n", j,
          device_name[3]);

      if (LPCBSIZE) break;
    }  // End LPCB find
  }
  if (!LPCBSIZE) return len;
  LPCBADR1 = LPCBADR + LPCBSIZE;
  ReplaceName(dsdt, len, device_name[3], "LPCB");

  if (LPCBADR) { // bridge or device
    i = LPCBADR;
    Size = get_size(dsdt, i);
    k = FindMethod(dsdt + i, Size, "_DSM");
    if (k != 0) {
      k += i;
        Size = get_size(dsdt, k);
        if(!Size) {
          return len;
        }
        sizeoffset = - 1 - Size;
        len = move_data(k - 1, dsdt, len, sizeoffset);
        //to correct outers we have to calculate offset
        len = CorrectOuters(dsdt, len, k - 2, sizeoffset);
        MsgLog("_DSM in LPC already exists, dropped\n");
    }
  }

  root = aml_create_node(NULL);
  // add Method(_DSM,4,NotSerialized) for LPC
  met = aml_add_method(root, "_DSM", 4);
  met = aml_add_store(met);
  pack = aml_add_package(met);