epiread.c
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/**************************************************************************
* *
* Copyright (C) 1995, Silicon Graphics, Inc. *
* *
* These coded instructions, statements, and computer programs contain *
* unpublished proprietary information of Silicon Graphics, Inc., and *
* are protected by Federal copyright law. They may not be disclosed *
* to third parties or copied or duplicated in any form, in whole or *
* in part, without the prior written consent of Silicon Graphics, Inc. *
* *
**************************************************************************/
#include "osint.h"
#include "piint.h"
#include "rcp.h"
/*
* Name: osPiReadIo
*
* Description:
* Perform a 32-bit programmed IO read from PI device address space with
* mutual exclusion support. This is a blocked IO operation.
*
*/
s32
osEPiReadIo(OSPiHandle *pihandle, u32 devAddr, u32 *data)
{
register s32 ret;
#ifdef _DEBUG
/* Ensure that address is 32-bit aligned */
if (devAddr & 0x3) {
__osError(ERR_OSPIREADIO, 1, devAddr);
return(-1);
}
#endif
/* Block to get resource token */
__osPiGetAccess();
ret = __osEPiRawReadIo(pihandle, devAddr, data);
/* Return resource token */
__osPiRelAccess();
return(ret);
} /* osEPiReadIo */