args.c

老外的一个开源项目

// Copyright (c) David Vescovi.  All rights reserved.
// Part of Project DrumStix
// Windows Embedded Developers Interest Group (WE-DIG) community project.
// http://www.we-dig.org
// Copyright (c) Microsoft Corporation.  All rights reserved.
//------------------------------------------------------------------------------
//
//  File: args.c           
//
//  This file implements boolloader arguments query.
//
//------------------------------------------------------------------------------
#include <bsp.h>

//------------------------------------------------------------------------------
//
//  Function:  OALArgsQuery
//
//  This function is called from other OAL modules to return boot arguments.
//  Boot arguments are typically placed in fixed memory location and they are
//  filled by boot loader. In case that boot arguments can't be located
//  the function should return NULL. The OAL module then must use default
//  values.
//
static    UINT8 g_uuid[16];


VOID* OALArgsQuery(UINT32 type)
{
    VOID *pData = NULL;
    BSP_ARGS *pArgs = (BSP_ARGS *)IMAGE_SHARE_ARGS_UA_START;

    OALMSG(OAL_ARGS&&OAL_FUNC, (L"+OALArgsQuery(%d)\r\n", type));

    // Check if there is expected signature
    if (
        pArgs->header.signature  != OAL_ARGS_SIGNATURE ||
        pArgs->header.oalVersion != OAL_ARGS_VERSION   ||
        pArgs->header.bspVersion != BSP_ARGS_VERSION
    ) 
	{
loop:
		OALMSG(OAL_ARGS&&OAL_FUNC, (L"Invalid Args signature\r\n"));
		OALMSG(1, (L"Mismatched bootloader/BSP version!\r\n"));
		goto loop;		
	}

    // Depending on required args
    switch (type) {

    case OAL_ARGS_QUERY_DEVID:
        pData = &pArgs->deviceId;
        break;
    case OAL_ARGS_QUERY_KITL:
        pArgs->kitl.flags |= (OAL_KITL_FLAGS_ENABLED | OAL_KITL_FLAGS_VMINI);

        // Has the bootloader provided a non-zero IP address and subnet mask?
        // If not, use DHCP to obtain this information.
        //
        if ((pArgs->kitl.ipAddress == 0) || (pArgs->kitl.ipMask == 0))
        {
            pArgs->kitl.flags |= OAL_KITL_FLAGS_DHCP;
        }

        // Has the bootloader provided information about which NIC it was using?
        // If not, choose the LAN91C111 as the default.
        //
        if (pArgs->kitl.devLoc.LogicalLoc == 0)
        {
            pArgs->kitl.devLoc.IfcType     = Internal;
            pArgs->kitl.devLoc.BusNumber   = 0;
            pArgs->kitl.devLoc.PhysicalLoc = (PVOID)(SMSC_ETH1_PA_BASE_REG + 0x300);
            pArgs->kitl.devLoc.LogicalLoc  = (DWORD)pArgs->kitl.devLoc.PhysicalLoc;
        }
        pData = &pArgs->kitl;
        break;
    case OAL_ARGS_QUERY_UUID:
		// TBD: make it unique .. its not now
		// read Flash serial number and OEM IDs
		pData = g_uuid;
        break;
    case BSP_ARGS_QUERY_DBGSERIAL:
        if ((pArgs->dbgSerPhysAddr != PXA255_BASE_REG_PA_FFUART) &&
			(pArgs->dbgSerPhysAddr != PXA255_BASE_REG_PA_STUART) &&
			(pArgs->dbgSerPhysAddr != PXA255_BASE_REG_PA_BTUART))
        {
            pArgs->dbgSerPhysAddr = PXA255_BASE_REG_PA_FFUART;
        }
        pData = &pArgs->dbgSerPhysAddr;
        break;
    case BSP_ARGS_QUERY_HARDWARE:
        pData = &pArgs->platformHardware;
        break;
    case BSP_ARGS_QUERY_BOOTLOADERVER:
        pData = &pArgs->bootloaderVersion;
        break;
    case BSP_ARGS_QUERY_BOOTFLAGS:
        pData = &pArgs->bootFlags;
        break;
    }

//cleanUp:
    OALMSG(OAL_ARGS&&OAL_FUNC, (L"-OALArgsQuery(pData = 0x%08x)\r\n", pData));
    return pData;
}

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