estcpu32backend.h

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#ifndef TGT_LINK_BDM_EST        // Should be defined in tgtlib.h
#define TGT_LINK_BDM_EST        (0x201)        /* EST BDM support */
#endif


////////////////////////////////////////////////////////////////////////////////
//  Declare back end class Est_T to operate EST's visionNET emulator.

class Est_T;

class Est_T : public Backend_T
    {
  public:

    // Constructors and Destructors.

    Est_T (char * tgtName, u_int timeout, u_int retryNum, char * devName, 
           u_int param, TGT_OPS * pTgtOps, EXT_FUNCS * pExtFunc);

    virtual ~Est_T (); 

    ////////////////////////////////////////////////////////////////////////////
    // Declare back end member functions which need to be overridden in 
    // the vendor-specific back end.

    //  Declaration of mandatory member functions.
    UINT32 tgtPing_m (void);

    UINT32 tgtConnect_m (WDB_TGT_INFO * pTgtInfo);

    UINT32 tgtDisconnect_m (void);

    UINT32 memRead_m (WDB_MEM_REGION * pMemRegion, 
                           WDB_MEM_XFER * pMemXfer);

    UINT32 memWrite_m (WDB_MEM_XFER * pMemXfer);

    UINT32 regsGet_m (WDB_REG_READ_DESC * pRegRead, 
                           WDB_MEM_XFER * pMemXfer);

    UINT32 regsSet_m (WDB_REG_WRITE_DESC * pRegWrite);

    UINT32 contextSuspend_m (WDB_CTX * pContext);

    UINT32 contextResume_m (WDB_CTX * pContext);

    UINT32 eventpointAdd_m (WDB_EVTPT_ADD_DESC * pEventPoint,
                           UINT32 * pEvtptNum);

    UINT32 eventpointDelete_m (WDB_EVTPT_DEL_DESC * pEventpoint);

    UINT32 eventGet_m (WDB_EVT_DATA * pEvtData);

    UINT32 contextCont_m (WDB_CTX * pContext);

    UINT32 contextStep_m (WDB_CTX_STEP_DESC * pContextStep);

    BOOL   evtPending_m (void);

    void   evtPendingClear_m (void);

    UINT32 serviceCall_m (u_long procNum, FUNCPTR inProc, 
                           char * in, FUNCPTR outProc, char * out);

    BOOL   freeResultArgs_m (void);

    //  optional member functions

#if 0
    //  the following methods should be supported when
    //  EST's API supports them.

    UINT32 memScan_m (WDB_MEM_SCAN_DESC * pMemScan, 
                           TGT_ADDR_T * pAdrs);

    UINT32 memFill_m (WDB_MEM_REGION * pMemRegion);

    UINT32 memMove_m (WDB_MEM_REGION * pMemRegion);
#endif

    UINT32 cacheTxtUpdate_m (WDB_MEM_REGION * pMemRegion);

    //  Backend_T::memChecksum_m() is overridden only because
    //  the EST API has low-bandwidth when reading target memory.

    UINT32 memChecksum_m (WDB_MEM_REGION * pMemRegion, UINT32 * pChecksumValue);

    ////////////////////////////////////////////////////////////////////////////
    // Helper Methods


    // mandatory helper methods

    virtual int  fdGet_m ();

    //  State management
    virtual UINT32 halt_m   ();
    virtual UINT32 unhalt_m ();


    //  vendor-specific helper methods

    //  Special EST helper methods improve performance
    //  by only accessing one register instead of the entire
    //  register set.
    virtual UINT32 regGetOne_m (uint16    estRegNum, void * regValue);
    virtual UINT32 regSetOne_m (uint16    estRegNum, void * regValue);

    static Est_T * pTheEstBkEnd_s ();


    // handles asynchronous events in the EST API
    static void eventCallBack (EST_ConnectionHandle, EST_Event *, void *);


    // Exception state management
    UINT32 excStateEnter_m (BDM_EXC_INFO * pExcInfo);
    UINT32 excStateExit_m  (BOOL doStep = TRUE);
    UINT32 excRegsGet_m    (WDB_REG_READ_DESC * pRegRead, 
                            WDB_MEM_XFER *      pMemXfer);
    BOOL   isExcState_m    ();


    ////////////////////////////////////////////////////////////////////////////
    // special types for dealing with target

    struct REG_SET_68K;        // WRS's REG_SET definition for 68k

    // special constants for dealing with target

    // MaxMtu specifies the maximum number of bytes which the
    // EST back end will attempt to read or write with one call
    // to EST's API.
    //
    // XXX - 4096 is actual the maximum allowed by Ethernet, however 
    // attempts to access more than 256 bytes per transaction cause the
    // API to fail.

    enum {MaxMtu = 256}; 

    ////////////////////////////////////////////////////////////////////////////
  protected:

    UINT32 wdbErrFigure_m (const char * pStr, int status, 
                           UINT32 wdbDefaultCode);

    virtual void bpEventGen_m ();    // Generate dummy BP event.

    // Converts a WRS register specification into EST's
    // enum value for the associated register.
    virtual UINT32 whichEstRegGet_m (UINT32         regSetOffset, 
                                     EST_Register * pWhichEstReg, 
                                     uint32 *       pEstRegSize);

    UINT32 stateBKM_m     (EST_OperatingMode & oldState);  // Enter BKM mode
    UINT32 stateRestore_m (EST_OperatingMode oldState);    // Return to old mode

    void eventQueuePut_m  (Event_T *      pEvent);
    void eventQueueGet_m  (WDB_EVT_DATA * pWdbEvent);


    ////////////////////////////////////////////////////////////////////////////
    // Est_T member data 

    static Est_T * pTheEstBkEnd_;  // ptr to back end object.

    EST_ConnectionHandle     emulator_;  // specifies a connection via EST's API
    EST_OperatingMode        oldTgtState_; // State of Target before halt_m ().

    // Event handling data
    int         eventFd_;  // file descriptor to wake target server on events.
    BOOL        isEvent_;  // True if there is an event on target.
    RWSlistCollectablesQueue eventQueue_; // FIFO Queue of emulator events

    // Exception state management data
    REG_SET_68K * pExcRegSet_; // IU Register Set of task causing exception.
    UINT          excCount_;   // counts levels of nested exceptions.
    
    };

// End of class Est_T
////////////////////////////////////////////////////////////////////////////////


////////////////////////////////////////////////////////////////////////////////
// WRS's type definitions for the 68k's register set.
//
// This information must agree with the definition in
// ${WIND_BASE}/target/h/regs.h which just
// #includes the architecture-specific definition in
// ${WIND_BASE}/target/h/arch/<cpuFamily>/regs<cpuFamily>.h.
//
// For example, this information comes from:
// ${WIND_BASE}/target/h/arch/mc68k/regsMc68k.h.

typedef unsigned short INSTR;

struct Est_T::REG_SET_68K
    {
    ULONG dataReg[8];   /* data registers */
    ULONG addrReg[8];   /* address registers */
    USHORT pad;     /* pad SR to a long */
    USHORT sr;      /* status register (must be second to last) */
    INSTR *pc;      /* program counter (must be last) */
    }; 

#ifdef WIN32
typedef struct wrs_reg_set_68k
    {
    ULONG dataReg[8];   /* data registers */
    ULONG addrReg[8];   /* address registers */
    USHORT pad;     /* pad SR to a long */
    USHORT sr;      /* status register (must be second to last) */
    INSTR *pc;      /* program counter (must be last) */
    } WRS_REG_SET_68K;
#endif

////////////////////////////////////////////////////////////////////////////////
// Inline methods

inline Est_T * Est_T::pTheEstBkEnd_s ()
    {
    return (pTheEstBkEnd_);
    }

inline BOOL    Est_T::isExcState_m ()
    {
    return ((excCount_ > 0) ? TRUE : FALSE);
    }

#endif /* #ifndef __INCestcpu32Backendh */