windows-xp/Source/XPSP1/NT/enduser/windows.com/iuengine/wubios/control.c

/*** control.c - System Control Message Support
 *
 *  Author:     Yan Leshinsky (YanL)
 *  Created     10/04/98
 *
 *  MODIFICATION HISTORY
 */

#include "wubiosp.h"

#pragma CM_PAGEABLE_DATA
#pragma CM_PAGEABLE_CODE

/***EP  WUBIOS_IOCtrl - Win32 Device IO Control entry point
 *
 *  ENTRY
 *      pioc -> DIOC structure
 *
 *  EXIT-SUCCESS
 *      returns ERROR_SUCCESS
 *  EXIT-FAILURE
 *      returns ERROR_*
 */

CM_VXD_RESULT CM_SYSCTRL WUBIOS_IOCtrl(PDIOCPARAMETERS pdioc)
{
    TRACENAME("WUBIOS_IOCtrl")
    CM_VXD_RESULT rc = ERROR_SUCCESS;

    ENTER(1, ("WUBIOS_IOCtrl(hVM=%lx,hDev=%lx,Code=%lx)\n",
              pdioc->VMHandle, pdioc->hDevice, pdioc->dwIoControlCode));

    switch (pdioc->dwIoControlCode)
    {
        case WUBIOCTL_GET_VERSION:
            if ((pdioc->cbOutBuffer < sizeof(DWORD)) || (pdioc->lpvOutBuffer == NULL))
            {
                DBG_ERR(("WUBIOS_IOCtrl: invalid parameter on GetVersion"));
                rc = ERROR_INVALID_PARAMETER;
            }
            else
            {
                PVMMDDB pddb = (PVMMDDB)pdioc->Internal2;

                *((PDWORD)pdioc->lpvOutBuffer) =
                    (pddb->DDB_Dev_Major_Version << 8) |
                    pddb->DDB_Dev_Minor_Version;

                if (pdioc->lpcbBytesReturned != NULL)
                    *((PDWORD)pdioc->lpcbBytesReturned) = sizeof(DWORD);
            }
            break;
        case WUBIOCTL_GET_ACPI_TABINFO:
            if ((pdioc->lpvOutBuffer == NULL) ||
                (pdioc->cbOutBuffer != sizeof(ACPITABINFO)))
            {
                DBG_ERR(("WUBIOS_IOCtrl: invalid parameter on GetTabInfo"));
                rc = ERROR_INVALID_PARAMETER;
            }
            else
            {
                PACPITABINFO pTabInfo = (PACPITABINFO)pdioc->lpvOutBuffer;

                if ((pTabInfo->dwPhyAddr = AcpiFindTable(pTabInfo->dwTabSig, NULL)) != 0)
                {
                    AcpiCopyROM(pTabInfo->dwPhyAddr, (PBYTE)&pTabInfo->dh, sizeof(pTabInfo->dh));
                }
                else
                {
                    DBG_ERR(("WUBIOS_IOCtrl: failed to get table info"));
                    rc = ERROR_GEN_FAILURE;
                }
            }
            break;

        case WUBIOCTL_GET_ACPI_TABLE:
            if ((pdioc->lpvInBuffer == NULL) || (pdioc->lpvOutBuffer == NULL) || (pdioc->cbOutBuffer == 0))
            {
                DBG_ERR(("WUBIOS_IOCtrl: invalid parameter on GetTable"));
                rc = ERROR_INVALID_PARAMETER;
            }
            else
            {
                AcpiCopyROM((DWORD)pdioc->lpvInBuffer, (PBYTE)pdioc->lpvOutBuffer, pdioc->cbOutBuffer);
            }
            break;
		case WUBIOCTL_GET_SMB_STRUCTSIZE:
            if ((pdioc->cbOutBuffer < sizeof(DWORD)) || (pdioc->lpvOutBuffer == NULL))
            {
                DBG_ERR(("WUBIOS_IOCtrl: invalid parameter on WUBIOCTL_GET_SMB_TABSIZE"));
                rc = ERROR_INVALID_PARAMETER;
            }
            else
            {
				*((PDWORD)(pdioc->lpvOutBuffer)) = SmbStructSize();
            }
			break;

		case WUBIOCTL_GET_SMB_STRUCT:
            if ((pdioc->lpvInBuffer == NULL) || (pdioc->lpvOutBuffer == NULL) || (pdioc->cbOutBuffer == 0))
            {
                DBG_ERR(("WUBIOS_IOCtrl: invalid parameter on GetTable"));
                rc = ERROR_INVALID_PARAMETER;
            }
            else
            {
                rc = SmbCopyStruct((DWORD)pdioc->lpvInBuffer, (PBYTE)pdioc->lpvOutBuffer, pdioc->cbOutBuffer);
            }
			break;
		case WUBIOCTL_GET_PNP_OEMID:
            if ((pdioc->cbOutBuffer < sizeof(DWORD)) || (pdioc->lpvOutBuffer == NULL))
            {
                DBG_ERR(("WUBIOS_IOCtrl: invalid parameter on WUBIOCTL_GET_PNP_OEMID"));
                rc = ERROR_INVALID_PARAMETER;
            }
            else
            {
				*((PDWORD)(pdioc->lpvOutBuffer)) = PnpOEMID();
            }
			break;
		default:
			;
    }

    EXIT(1, ("WUBIOS_IOCtrl=%x\n", rc));
    return rc;
}       //WUBIOS_IOCtrl

/***LP  CheckSum - Calculate checksum of a buffer
 *
 *  ENTRY
 *      pb -> buffer
 *      dwLen - length of buffer
 *
 *  EXIT
 *      returns checksum
 */

BYTE CM_INTERNAL CheckSum(PBYTE pb, DWORD dwLen)
{
    TRACENAME("CHECKSUM")
    BYTE bChkSum = 0;

    ENTER(3, ("CheckSum(pb=%x,Len=%x)\n", pb, dwLen));

    while (dwLen > 0)
    {
        bChkSum = (BYTE)(bChkSum + *pb);
        pb++;
        dwLen--;
    }

    EXIT(3, ("CheckSum=%x\n", bChkSum));
    return bChkSum;
}       //CheckSum