sysserial.c

菲利普22系列 vxworks bsp 可以用来可以和其他版本的ARM vxworks bsp（特别是7内核的进行比较）进行比较可以加深对BSP的理解和掌握

/* sysSerial.c - Samsung SBC ARM7 serial device initialization */

/* Copyright 1984-2001 Wind River Systems, Inc. */
#include "copyright_wrs.h"

#include "vxWorks.h"
#include "iv.h"
#include "intLib.h"
#include "config.h"
#include "sysLib.h"
#include "lpc2210Sio.h"

#include "wrSbcArm7.h"

#include "lpc2210Sio.c"

/* device initialization structure */

typedef struct
{
    UINT  intLevel;
    UINT32 *baseAdrs;
    UINT  regSpace;
} SBCARM7_CHAN_PARAS;


/* Local data structures */

LOCAL SBCARM7_CHAN_PARAS devParas[] =
{
    {INT_LVL_UART0, (UINT32 *)SERIAL_0_BASE_ADR}
};
 
LOCAL LPC2210_CHAN lpc2210Chan[N_SBCARM7_UART_CHANNELS];

/*
 * Array of pointers to all serial channels configured in system.
 * See sioChanGet(). It is this array that maps channel pointers
 * to standard device names.  The first entry will become "/tyCo/0",
 * the second "/tyCo/1", and so forth.
 */

SIO_CHAN * sysSioChans [] =
{
    &lpc2210Chan[0].sio, /* /tyCo/0 */
};


/* forward declarations */

/******************************************************************************
*
* sysSerialHwInit - initialize the BSP serial devices to a quiesent state
*
* This routine initializes the BSP serial device descriptors and puts the
* devices in a quiesent state.  It is called from sysHwInit() with
* interrupts locked.
*
* RETURNS: N/A
*
* SEE ALSO: sysHwInit()
*/

void sysSerialHwInit (void)
{
    int i;

    for (i = 0; i < N_SBCARM7_UART_CHANNELS; i++)
    {
        lpc2210Chan[i].regs = devParas[i].baseAdrs;
        lpc2210Chan[i].baudRate = CONSOLE_BAUD_RATE;
        lpc2210Chan[i].intLevel = devParas[i].intLevel;

        /*
         * Initialize driver functions, getTxChar, putRcvChar and channelMode
         * and initialize UART
         */

        lpc2210DevInit(&lpc2210Chan[i]);
    }
}

/******************************************************************************
*
* sysSerialHwInit2 - connect BSP serial device interrupts
*
* This routine connects the BSP serial device interrupts.  It is called from
* sysHwInit2().  Serial device interrupts could not be connected in
* sysSerialHwInit() because the kernel memory allocator was not initialized
* at that point, and intConnect() may call malloc(). 
* 
* RETURNS: N/A 
*
* SEE ALSO: sysHwInit2()
*/

void sysSerialHwInit2 (void)
{
    int i;

    for (i = 0; i < N_SBCARM7_UART_CHANNELS; i++)
    {
        /*
         * Connect and enable the interrupt.
         * We would like to check the return value from this and log a message
         * if it failed. However, logLib has not been initialized yet, so we
         * cannot log a message, so there's little point in checking it.
         */

        (void) intConnect (INUM_TO_IVEC(lpc2210Chan[i].intLevel),
                           lpc2210UARTInt, (int)&lpc2210Chan[i] );

        lpc2210DevInit2(&lpc2210Chan[i]);
    }
}

/******************************************************************************
*
* sysSerialChanGet - get the SIO_CHAN device associated with a serial channel
*
* This routine returns a pointer to the SIO_CHAN device associated with
* a specified serial channel.  It is called by usrRoot() to obtain
* pointers when creating the system serial devices '/tyCo/x'.  It is also
* used by the WDB agent to locate its serial channel.
*
* RETURNS: A pointer to the SIO_CHAN structure for the channel, or ERROR
* if the channel is invalid.
*/

SIO_CHAN * sysSerialChanGet
    (
    int channel         /* serial channel */
    )
    {
    if (channel < 0 || channel >= (int)(NELEMENTS(sysSioChans)))
        return (SIO_CHAN *)ERROR;

    return sysSioChans[channel];
    }

/******************************************************************************
*
* sysSerialReset - reset the sio devices to a quiet state
*
* Reset all devices to prevent them from generating interrupts.
*
* This is called from sysToMonitor to shutdown the system gracefully before
* transferring to the bootroms.
*
* RETURNS: N/A.
*/

void sysSerialReset (void)
{
    int i;

    for (i = 0; i < N_SBCARM7_UART_CHANNELS; i++)
    {
        /* disable serial interrupts */
        intDisable (devParas[i].intLevel);
    }
}