winbond.c

文件内包含了nuclues的内核代码和针对Power PC的编译器。需要用VirtNet生成一个虚拟网卡才可使用

/************************************************************************/
/*                                                                      */
/*       Copyright (c) 2001 by Accelerated Technology, Inc.             */
/*                                                                      */
/*  PROPRIETARY RIGHTS of Accelerated Technology are  involved in       */
/*  the subject matter of this material.  All manufacturing,            */
/*  reproduction, use, and sales rights pertaining to this subject      */
/*  matter are  governed by the license agreement.  The recipient of    */
/*     this software implicitly accepts the terms of the license.       */
/*                                                                      */
/*                                                                      */
/************************************************************************/
/************************************************************************/
/* FILE NAME                              VERSION                       */
/*                                                                      */
/*        winbond.c              Nucleus PLUS\MPC8245\Diab C/C++ 1.13.1 */
/*                                                                      */
/*                                                                      */
/* DESCRIPTION                                                          */
/*                                                                      */
/*        Support services for the Winbond W83C553F System I/O          */
/*        controller with PCI Arbiter.                                  */
/*                                                                      */
/*                                                                      */
/* DATA STRUCTURES                                                      */
/*                                                                      */
/*        none                                                          */
/*                                                                      */
/* FUNCTIONS                                                            */
/*                                                                      */
/*        wb_Init                                                       */
/*                                                                      */
/* DEPENDENCIES                                                         */
/*        NA                                                            */
/*                                                                      */
/* HISTORY                                                              */
/*                                                                      */
/*        NAME              DATE                   REMARKS              */
/*                                                                      */
/*      T. Weller        12\19\2001       Created inital version 1.13.1 */
/************************************************************************/
#include "winbond.h"

/************************************************************************/
/* wb_Init                                                              */
/*                                                                      */
/*                                                                      */
/* DESCRIPTION                                                          */
/*                                                                      */
/*    Performs initialization of the Winbond controller.                */
/*                                                                      */
/************************************************************************/
STATUS wb_Init()
{
    /* Assume success */
    STATUS status = NU_SUCCESS;     
    UINT8   tByte;
    
    /* Configure the cascaded interrupt controllers */

    /* Select ICW1, ICW4 write needed */
    WB_OUTBYTE( IO_Base + PIC1_ICW1, 0x11 );
    /* Set address of interrupt vector */
    WB_OUTBYTE( IO_Base + PIC1_ICW2, 0x00 );
    /* Slave IC is cascaded on IRQ 2*/
    WB_OUTBYTE( IO_Base + PIC1_ICW3, 0x04 );
    /* Single bit interrupt sequence mode */
    WB_OUTBYTE( IO_Base + PIC1_ICW4, 0x01 );
    /* Lock out all but slave interrupt controller */
    WB_OUTBYTE( IO_Base + PIC1_OCW1, 0xfb );
    /* Select ICW1, ICW4 write needed */
    WB_OUTBYTE( IO_Base + PIC2_ICW1, 0x11 );
    /* Set address of interrupt vector */
    WB_OUTBYTE( IO_Base + PIC2_ICW2, 0x08 );
    /* Set slave ID */
    WB_OUTBYTE( IO_Base + PIC2_ICW3, 0x02 );
    /* Single bit interrupt sequence mode */
    WB_OUTBYTE( IO_Base + PIC2_ICW4, 0x01 );
    /* Lock out all interrupts on slave interrupt controller */
    WB_OUTBYTE( IO_Base + PIC2_OCW1, 0xff );
    /* End of interrupt controller configuration */

    WB_OUTBYTE( IO_Base + PIC1_OCW1, 0xe7 );
    
    tByte = WB_INBYTE( IO_Base + PIC1_INT_CONTROL);
    tByte = 0x00; /* All channels set to edge triggered */
    WB_OUTBYTE( IO_Base + PIC1_INT_CONTROL, tByte);
    WB_OUTBYTE( IO_Base + PIC2_INT_CONTROL, tByte);

    return status;

}