ravenpci.c

VxWorks下 Mcpn750的BSP源代码

/* ravenPci.c - Raven PCI bus bridge chip initialization */

/* Copyright 1984-1999 Wind River Systems, Inc. */
/* Copyright 1996,1997,1998,1999 Motorola, Inc., All Rights Reserved */

/*
modification history
--------------------
01b,23apr99,srr  changed names to sysRaven...
01a,12dec97,rhk  created by Motorola.
*/

/*
DESCRIPTION
The following contains the initialization routines
for the Raven, a Host PCI Bridge/Memory Controller used in
Motorola's PowerPC based boards.

.CS
   Initialize the RAVEN MPC registers.
   notes:

   1. For the standard vxWorks configuration the  MPC to
      PCI mapping registers are initialized to the PReP
      model with some additions:

   MPC Address Range   PCI Address Range      Definition
   -----------------   -----------------   -----------------
   80000000 BF7FFFFF   00000000 3F7FFFFF   ISA/PCI I/O space
   C0000000 FCFFFFFF   00000000 3CFFFFFF   ISA/PCI Mem space w/MPIC
   FD000000 FDFFFFFF   00000000 00FFFFFF   ISA/PCI Mem space
   FE000000 FE7FFFFF   00000000 007FFFFF   ISA/PCI I/O space

   2. This assignments do not include the entire PReP PCI
      address space, this is due to the conflicting local
      resources of the H/W.

   3. When EXTENDED_VME is defined the mapping is as follows:

   MPC Address Range   PCI Address Range      Definition
   -----------------   ------------------  -----------------
   10000000 FBFFFFFF   10000000 FBFFFFFF   VME address space (1)
   FC000000 FCFFFFFF   FC000000 FCFFFFFF   MPIC/Reg space
   FD000000 FDFFFFFF   FD000000 FDFFFFFF   ISA/PCI Memory space
   FE000000 FE7FFFFF   00000000 007FFFFF   ISA/PCI I/O space

   Note 1, the starting address is controlled by the macro
   VME_A32_MSTR_LOCAL
.CE

*/

/* includes */

/* defines */

#define RAVEN_ADDR( reg )        ( RAVEN_BASE_ADRS + reg )

#define RAVEN_WRITE8( writeAddr, data )  ( *(UINT8 *)(writeAddr) = data )

#define RAVEN_WRITE16( writeAddr, data )  ( *(UINT16 *)(writeAddr) = data )

#define RAVEN_WRITE32( writeAddr, data )  ( *(UINT32 *)(writeAddr) = data )

/* typedefs */

/* globals */

/* forward declarations */

/*******************************************************************************
*
* sysRavenInit - initialize the Raven registers
*
* This function performs the first portion of the required initialization 
* of the Raven registers, and sets up the CPU->PCI windows.
*
* RETURNS: N/A
*/

void sysRavenInit (void)
    {
    RAVEN_WRITE16( RAVEN_ADDR(RAVEN_MPC_GCSR), 0 );
    EIEIO_SYNC;

    RAVEN_WRITE16( RAVEN_ADDR(RAVEN_MPC_MARB), 0x0703 );
    EIEIO_SYNC;

    RAVEN_WRITE8( RAVEN_ADDR(RAVEN_MPC_PADJ), 0xBE );
    EIEIO_SYNC;

    RAVEN_WRITE16( RAVEN_ADDR(RAVEN_MPC_MEREN), 0 );
    EIEIO_SYNC;

    RAVEN_WRITE8( RAVEN_ADDR(RAVEN_MPC_MERST), 0xFF );
    EIEIO_SYNC;

    /* initially set the CPU->PCI attribute registers to disabled */

    RAVEN_WRITE8( RAVEN_ADDR(RAVEN_MPC_MSATT0), 0 );
    EIEIO_SYNC;

    RAVEN_WRITE8( RAVEN_ADDR(RAVEN_MPC_MSATT1), 0 );
    EIEIO_SYNC;

    RAVEN_WRITE8( RAVEN_ADDR(RAVEN_MPC_MSATT2), 0 );
    EIEIO_SYNC;

    RAVEN_WRITE8( RAVEN_ADDR(RAVEN_MPC_MSATT3), 0 );
    EIEIO_SYNC;

    /* Do all of the CPU to PCI window registers */

    /* MSADD0, MSOFF0, MSATT0 registers */

    RAVEN_WRITE32( RAVEN_ADDR(RAVEN_MPC_MSADD0), 
		   ((CPU2PCI_ADDR0_START<<16) | CPU2PCI_ADDR0_END) );
    EIEIO_SYNC;

    RAVEN_WRITE16( RAVEN_ADDR(RAVEN_MPC_MSOFF0), CPU2PCI_OFFSET0 );
    EIEIO_SYNC;

    RAVEN_WRITE8( RAVEN_ADDR(RAVEN_MPC_MSATT0), CPU2PCI_MSATT0 );
    EIEIO_SYNC;

    /* MSADD1, MSOFF1, MSATT1 registers */

    RAVEN_WRITE32( RAVEN_ADDR(RAVEN_MPC_MSADD1),
		   ((CPU2PCI_ADDR1_START<<16) | CPU2PCI_ADDR1_END) );
    EIEIO_SYNC;

    RAVEN_WRITE16( RAVEN_ADDR(RAVEN_MPC_MSOFF1), CPU2PCI_OFFSET1 );
    EIEIO_SYNC;

    RAVEN_WRITE8( RAVEN_ADDR(RAVEN_MPC_MSATT1), CPU2PCI_MSATT1 );
    EIEIO_SYNC;


    /* MSADD2, MSOFF2, MSATT2 registers */
    
    RAVEN_WRITE32( RAVEN_ADDR(RAVEN_MPC_MSADD2),
                   ((CPU2PCI_ADDR2_START<<16) | CPU2PCI_ADDR2_END) );
    EIEIO_SYNC;

    RAVEN_WRITE16( RAVEN_ADDR(RAVEN_MPC_MSOFF2), CPU2PCI_OFFSET2 );
    EIEIO_SYNC;

    RAVEN_WRITE8( RAVEN_ADDR(RAVEN_MPC_MSATT2), CPU2PCI_MSATT2 );
    EIEIO_SYNC;

    /*
     * PCI address space 3 registers supports config. space access and
     * special cycle generation.  It should be configured for I/O space.
     */

    RAVEN_WRITE32( RAVEN_ADDR(RAVEN_MPC_MSADD3),
                   ((CPU2PCI_ADDR3_START<<16) | CPU2PCI_ADDR3_END) );
    EIEIO_SYNC;

    RAVEN_WRITE16( RAVEN_ADDR(RAVEN_MPC_MSOFF3), CPU2PCI_OFFSET3 );
    EIEIO_SYNC;

    RAVEN_WRITE8( RAVEN_ADDR(RAVEN_MPC_MSATT3), CPU2PCI_MSATT3 );
    EIEIO_SYNC;

    }


/******************************************************************************
*
* sysRavenInitPciExt - initialize the extended portion of the Raven PCI header
*
* This routine initializes the extended portion of the PCI header for the
* Motorola Raven ISA Bridge Controller (IBC).
*
* RETURNS: OK, or ERROR if...
*
*/

STATUS sysRavenInitPciExt
    (
    int busNo,          /* bus number */
    int deviceNo,       /* device number */
    int funcNo          /* function number */
    )
    {
    /*
     * Init Raven's MPIC control register access addresses in I/O and
     * memory spaces:
     *
     * IOSPACE  - 0x00000000  [no access]
     * MEMSPACE - 0x3C000000  [MPIC_PCI_BASE_ADRS]
     */

    pciConfigOutLong (busNo, deviceNo, funcNo, PCI_CFG_BASE_ADDRESS_0,
                      0x00000000);
    pciConfigOutLong (busNo, deviceNo, funcNo, PCI_CFG_BASE_ADDRESS_1,
                      MPIC_PCI_BASE_ADRS);

    /*
     *  Init Raven's Slave decoders (range/offset/attributes)
     *
     *  These decoders map addresses on the PCI bus to the CPU for
     *  access to local DRAM.
     *
     *  Because hardware can read past real memory, it is necessary to disable
     *  Read Ahead for the last 64k of physical memory (DRAM).
     */

    pciConfigOutLong (busNo, deviceNo, funcNo, PCI_CFG_RAVEN_PSADD0,
                      PCI2CPU_ADDR0_RANGE);
    pciConfigOutWord (busNo, deviceNo, funcNo, PCI_CFG_RAVEN_PSOFF0,
                      PCI2CPU_OFFSET0);
    pciConfigOutByte (busNo, deviceNo, funcNo, PCI_CFG_RAVEN_PSATT0,
                      PCI2CPU_ATT0);

    pciConfigOutLong (busNo, deviceNo, funcNo, PCI_CFG_RAVEN_PSADD1,
                      PCI2CPU_ADDR1_RANGE);
    pciConfigOutWord (busNo, deviceNo, funcNo, PCI_CFG_RAVEN_PSOFF1,
                      PCI2CPU_OFFSET1);
    pciConfigOutByte (busNo, deviceNo, funcNo, PCI_CFG_RAVEN_PSATT1,
                      PCI2CPU_ATT1);

    pciConfigOutLong (busNo, deviceNo, funcNo, PCI_CFG_RAVEN_PSADD2,
                      PCI2CPU_ADDR2_RANGE);
    pciConfigOutWord (busNo, deviceNo, funcNo, PCI_CFG_RAVEN_PSOFF2,
                      PCI2CPU_OFFSET2);
    pciConfigOutByte (busNo, deviceNo, funcNo, PCI_CFG_RAVEN_PSATT2,
                      PCI2CPU_ATT2);

    pciConfigOutLong (busNo, deviceNo, funcNo, PCI_CFG_RAVEN_PSADD3,
                      PCI2CPU_ADDR3_RANGE);
    pciConfigOutWord (busNo, deviceNo, funcNo, PCI_CFG_RAVEN_PSOFF3,
                      PCI2CPU_OFFSET3);
    pciConfigOutByte (busNo, deviceNo, funcNo, PCI_CFG_RAVEN_PSATT3,
                      PCI2CPU_ATT3);

    /*
     *  Enable Raven's PCI master capability and MEM space
     *  (i.e., enable PCI space decoders).
     */
    pciConfigOutWord (busNo, deviceNo, funcNo, PCI_CFG_COMMAND, 0x0006);

    return(OK);
    }

/******************************************************************************
*
* sysRavenErrClr - Clear error conditions in Raven
*
* This routine clears any existing errors in the Motorola Raven PCI Host Bridge
* Controller.
*
* RETURNS: N/A
*/

void sysRavenErrClr (void)
    {
    /* Clear MPC Error Status register */

    sysOutByte ((RAVEN_BASE_ADRS + RAVEN_MPC_MERST), RAVEN_MPC_MERST_CLR);

    /* get and clear Raven PCI status reg */

    pciConfigOutWord (sysRavPciBusNo, sysRavPciDevNo, sysRavPciFuncNo,
                      PCI_CFG_STATUS,
                      RAVEN_PCI_CFG_STATUS_DPAR | RAVEN_PCI_CFG_STATUS_SIGTA |
                      RAVEN_PCI_CFG_STATUS_RCVTA | RAVEN_PCI_CFG_STATUS_RCVMA |
                      RAVEN_PCI_CFG_STATUS_SIGSE | RAVEN_PCI_CFG_STATUS_RCVPE);
    }