flashreadstatus.c
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/*---------------------------------------------------------------------
Copyright (C) 1998 Nintendo.
File flash.c
Coded by Atushi Watanabe. Dec 1, 1998.
Modified by Atushi Watanabe. Apr 4, 2000.
Comments 1M Flash ROM access functions(Ver.7.6)
$Id: flashreadstatus.c,v 1.2 2003/03/26 02:00:13 blythe Exp $
---------------------------------------------------------------------*/
/**************************************************************************
*
* $Revision: 1.2 $
* $Date: 2003/03/26 02:00:13 $
* $Source:
*
**************************************************************************/
#include <ultra64.h>
#include "osint_flash.h"
#ifdef BBPLAYER
#include "bbint.h"
#endif
/* READ STATUS */
void osFlashReadStatus(u8 *flash_status)
{
#ifdef BBPLAYER
if (__osBbFlashSize)
*flash_status = 0;
else
*flash_status = 0xff;
#else
u32 status;
/* Read Status Register */
/* コマンドコンビネーションバグの（３）を回避するためのダミーコマンド */
/* ステータス２度読みで回避 */
/* １回目 */
/* Set Read Status */
osEPiWriteIo(&__osFlashHandler,(__osFlashHandler.baseAddress|0x10000),0xd2000000);
/* Read Status Register */
osEPiReadIo(&__osFlashHandler,__osFlashHandler.baseAddress, &status);
/* ２回目 */
/* Set Read Status */
osEPiWriteIo(&__osFlashHandler,(__osFlashHandler.baseAddress|0x10000),0xd2000000);
/* Read Status Register */
osEPiReadIo(&__osFlashHandler,__osFlashHandler.baseAddress, &status);
*flash_status = (u8)(status & 0xff);
return;
#endif
}