📄 etherhwinit.c
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//
// 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.
//
//
// etherinit.c
//
#include <bsp.h>
#include "loader.h"
//#include "board.h"
//
// Helper function for identifying PCMCIA network cards
//
static BOOL VerifyEthernetPCMCIACard(UINT32 SlotAddress)
{
volatile UINT8 Attribute;
volatile UINT8 *pAttribute = (UINT8 *) SlotAddress;
volatile UINT8 *pLastAttribute;
// End of the PCMCIA attribute list.
//
pLastAttribute = pAttribute + 0x200;
//
Attribute = *pAttribute;
if (Attribute != (UINT8) 0x01)
{
EdbgOutputDebugString("ERROR: Invalid PCMCIA configuration data 0x%x. at addr 0x%x\r\n", Attribute, pAttribute);
return (FALSE);
}
// Look for tuple.
//
while ((Attribute != (UINT8) 0x21) && (pAttribute < pLastAttribute))
{
pAttribute += sizeof(UINT16); // Step to tuple length.
Attribute = *pAttribute;
pAttribute += sizeof(UINT16) + (sizeof(UINT16) * Attribute); // Step over tuple.
Attribute = *pAttribute;
}
// Find a valid tuple?
//
if (pAttribute < pLastAttribute)
{
pAttribute += sizeof(UINT16); // Defined tuple length.
if ((Attribute = *pAttribute) == 2)
{
pAttribute += sizeof(UINT16);
Attribute = *pAttribute;
// Found an Ethernet card...
//
if (Attribute == 0x06)
{
return (TRUE);
}
}
}
return (FALSE);
}
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