kitl.c

S3C24A0的完整BSP包,对开发此芯片的开发者很有用.

//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this source code is subject to the terms of the Microsoft end-user
// license agreement (EULA) under which you licensed this SOFTWARE PRODUCT.
// If you did not accept the terms of the EULA, you are not authorized to use
// this source code. For a copy of the EULA, please see the LICENSE.RTF on your
// install media.
//
//------------------------------------------------------------------------------
//
//  File:  kitl.c
//
//  Support routines for KITL. 
//
//  Note: this routines are stubbed out in the kern image.
//
//------------------------------------------------------------------------------

#include <bsp.h>
#include <kitl_cfg.h>
#include <fmd.h>

//------------------------------------------------------------------------------

#define BSP_PREV_ARGS_COOKIE    0x80020800
#define BSP_PREV_ARGS_MAC       0x8002080C

//------------------------------------------------------------------------------

BOOL OALKitlStart()
{
    BOOL rc;
    OAL_KITL_ARGS *pArgs, args;
    CHAR *szDeviceId, buffer[OAL_KITL_ID_SIZE];

    OALMSG(OAL_KITL&&OAL_FUNC, (L"+OALKitlStart\r\n"));

    // Look for bootargs left by the bootloader or left over from an earlier boot.
    //
    pArgs      = (OAL_KITL_ARGS*)OALArgsQuery(OAL_ARGS_QUERY_KITL);
    szDeviceId = (CHAR*)OALArgsQuery(OAL_ARGS_QUERY_DEVID);

    // If we don't have bootargs in RAM, look first in NOR flash for the information
    // otherwise look on the SmartMedia NAND card (in case we're performing a NAND-only) boot.
    //
    if (pArgs == NULL)
    {
        // Look in NOR flash.
        if (*(UINT32*)IMAGE_SHARE_ARGS_CA_START  == 0x45424F54)
        {
            OALMSG(OAL_INFO, (L"INFO: Using KITL arguments stored in flash.\r\n"));
            memset(&args, 0, sizeof(args));
            args.flags = OAL_KITL_FLAGS_ENABLED | OAL_KITL_FLAGS_DHCP | OAL_KITL_FLAGS_VMINI;
            args.devLoc.IfcType = Internal;
            args.devLoc.BusNumber = 0;
            args.devLoc.LogicalLoc = BSP_BASE_REG_PA_CS8900A_IOBASE;
            memcpy(args.mac, (VOID*)BSP_PREV_ARGS_MAC, sizeof(args.mac));
            args.ipAddress = 0;
            pArgs = &args;
        }
        // Look on the SmartMedia (NAND) card.
        else
        {
            SectorInfo si;
            UINT8 maccount = 0;

            // Get MAC address from NAND flash...
            //
            if (FMD_Init(NULL, NULL, NULL) == NULL)
            {
                OALMSG(OAL_ERROR, (L"ERROR: Failed to initialize NAND flash controller.\r\n"));
                return(FALSE);
            }

            // If block 0 isn't reserved, we can't trust that the values we read for the MAC address are
            // correct.  They may actually be valid logical sector numbers (we're overloading the use
            // of the logical sector number field).
            //
            if (!(FMD_GetBlockStatus(0) & BLOCK_STATUS_RESERVED))
            {
                OALMSG(OAL_ERROR, (L"ERROR: Block 0 isn't reserved - can't trust MAC address values stored in NAND.\r\n"));
                return(FALSE);
            }

            OALMSG(OAL_INFO, (L"INFO: Using KITL arguments stored on SmartMedia.\r\n"));
            memset(&args, 0, sizeof(args));
            args.flags = OAL_KITL_FLAGS_ENABLED | OAL_KITL_FLAGS_DHCP | OAL_KITL_FLAGS_VMINI;
            args.devLoc.IfcType = Internal;
            args.devLoc.BusNumber = 0;
            args.devLoc.LogicalLoc = BSP_BASE_REG_PA_CS8900A_IOBASE;
            args.ipAddress = 0;

            // We know the first block of NAND flash must be good, so we needn't worry about bad blocks when reading.
            //
            maccount = 0;
            do
            {
                if (!FMD_ReadSector(maccount, NULL, &si, 1))
                {
                    OALMSG(OAL_ERROR, (L"ERROR: NAND flash read error (sector = 0x%x).\r\n", maccount));
                    return(FALSE);
                }

                args.mac[maccount] = (UINT16)(si.dwReserved1 & 0xFFFF);

            } while(++maccount < 3);

            pArgs = &args;

        }
    }        

    // If there isn't device id from bootloader create some.
    //
    if (szDeviceId == NULL)
    {
        OALKitlCreateName(BSP_DEVICE_PREFIX, args.mac, buffer);
        szDeviceId = buffer;
    }

    // Finally call KITL library.
    //
    rc = OALKitlInit(szDeviceId, pArgs, g_kitlDevices);

    OALMSG(OAL_KITL&&OAL_FUNC, (L"-OALKitlStart(rc = %d)\r\n", rc));
    
	return(rc);

}

//------------------------------------------------------------------------------
//
//  Function:  OALGetTickCount
//
//  This function is called by some KITL libraries to obtain relative time
//  since device boot. It is mostly used to implement timeout in network
//  protocol.
//

UINT32 OALGetTickCount()
{
    static ULONG count = 0;

    count++;
    return count/100;
}

// Define a dummy SetKMode function to satisfy the NAND FMD.
//
DWORD SetKMode (DWORD fMode)
{
    return(1);
}
//------------------------------------------------------------------------------