visiontmdasmxscale.c

IXP425的BSP代码

/* visionTmdAsmXscale.c - Wind River visionTMD Interupt routines */

/* Copyright 1988-2002 Wind River Systems Inc. */

/*
modification history
--------------------
01d,26apr01,g_h  Fix syntax error from LONG to ULONG
01c,21dec01,g_h  Rename to visionTmdAsmXscale.c
01b,30nov01,g_h  Cleaning for T2.2
01a,19nov01,g_h  Adapted from visionTMDAsmPPC.c ver 01e

*/

/*
DESCRIPTION
These low-level IO interface routines which signal the emulation
product that we desire to initialize/initiate/complete IO.
*/

#include "vxWorks.h"
#include "drv/wdb/vision/visionTmdDrv.h"

/* externals */

IMPORT unsigned long txDesc; /* Duplicate location of the XMIT space */
IMPORT unsigned long rxDesc; /* Duplicate location of the RECV space */

/* forward declarations */

LOCAL void tmdXSCALESignalSubDescReady (ULONG lrxDesc, ULONG ltxDesc);

#if (CPU == XSCALE)
/***************************************************************************
*
* tmdXSCALESignalDescReady - inform emulator the location of Rx/Tx 
*                            descriptors
*
* This routine inform emulator the location of Rx/Tx descriptors.
*
* RETURNS: N/A
*/

void tmdXSCALESignalDescReady
    (
    void
    )
    {
    tmdXSCALESignalSubDescReady (rxDesc, txDesc);
    }
#endif /* (CPU == XSCALE) */

#if (CPU == XSCALE)
/***************************************************************************
*
* tmdXSCALEignalTxReady - inform emulator the location of Rx/Tx 
*                         descriptors.
*
* This routine inform emulator the location of Rx/Tx descriptors.
*
* RETURNS: N/A
*/         
void tmdXSCALESignalTxReady
    (
    void
    )
    {
    _WRS_ASM("txBdmBgnd:                     ");
    _WRS_ASM("      .long 0xE1200070         ");
    }
#endif /* (CPU == XSCALE) */

#if (CPU == XSCALE)
/***************************************************************************
*
* tmdXSCALESignalRxReady - inform emulator the location of Rx/Tx 
*                          descriptors.
*
* This routine inform emulator the location of Rx/Tx descriptors.
*
* RETURNS: N/A
*/                                                                              

void tmdXSCALESignalRxReady
    (
    void
    )                                                
    {
    return;
    }
#endif /* (CPU == XSCALE) */

#if (CPU == XSCALE)
/***************************************************************************
*
* tmdXSCALESignalSubDescReady - inform emulator the location of Rx/Tx 
*                                 descriptors.
*
* This routine inform emulator the location of Rx/Tx descriptors.
*
* RETURNS: N/A
*/                                                                              

LOCAL void tmdXSCALESignalSubDescReady
    (
    ULONG lrxDesc, 
    ULONG ltxDesc
    )
    {
    /* Setup rxDesc Ptr into R2 */
    _WRS_ASM("	    MOV   r2,r0              ");
	
    /* Setup txDesc Ptr into R1 */
    _WRS_ASM("	    MOV   r1,r1              ");

    /* Set R0 to init command (0x5c5c5c5c) */
    _WRS_ASM("      MOV   r0,#0x5c           ");
    _WRS_ASM("      ADD   r0,r0,r0,lsl #0x8  ");
    _WRS_ASM("      ADD   r0,r0,r0,lsl #0x10 ");

    /* Setup R3 to point to Tx function */
    _WRS_ASM("      LDR   r3,=txBdmBgnd;     ");

    /* Notify emulator via software breakpoint */
    _WRS_ASM("      .long 0xE1200070         "); 

    _WRS_ASM("      MOV   pc, lr             ");

    _WRS_ASM("      .ltorg                   ");
    }
#endif /* (CPU == XSCALE) */