sparc_ex.c

eCos操作系统源码

            TRAPPROC( i, cyg_uint32, 1, get_iplus );
            TRAPPROC( i, cyg_uint32, 2, get_iplus );
            TRAPPROC( i, cyg_uint32, 3, get_iplus );

            TRAPPROC( i, cyg_uint32, 5, get_i );
            TRAPPROC( i, cyg_uint32, 6, get_i );
            TRAPPROC( i, cyg_uint32, 7, get_i );

            TRAPPROC( s, cyg_uint16, 1, get_splus );
            TRAPPROC( s, cyg_uint16, 3, get_splus );

            TRAPPROC( s, cyg_uint16, 5, get_s );
            TRAPPROC( s, cyg_uint16, 7, get_s );
        }

        CYG_TEST_PASS( "Unaligned accesses OK" );

        // Now test some legal and illegal accesses intermingled.

        for ( repeats = (cyg_test_is_simulator ? SIM_REPEATS : HW_REPEATS) ;
              repeats > 0 ; repeats-- ) {

            SAFEPROC( l, cyg_uint64, 0, get_llplus );
            TRAPPROC( l, cyg_uint64, 5, get_llplus );
            TRAPPROC( l, cyg_uint64, 6, get_llplus );
            SAFEPROC( l, cyg_uint64, 8, get_llplus );

            TRAPPROC( i, cyg_uint32, 1, get_iplus );
            SAFEPROC( i, cyg_uint32, 4, get_iplus );
            TRAPPROC( i, cyg_uint32, 2, get_iplus );
            SAFEPROC( i, cyg_uint32, 8, get_iplus );
            SAFEPROC( i, cyg_uint32, 12, get_iplus );
            SAFEPROC( i, cyg_uint32, 16, get_iplus );
            TRAPPROC( i, cyg_uint32, 3, get_iplus );

            TRAPPROC( s, cyg_uint16, 5, get_s );
            SAFEPROC( s, cyg_uint16, 6, get_s );
            TRAPPROC( s, cyg_uint16, 7, get_s );
            SAFEPROC( s, cyg_uint16, 8, get_s );
 
            TRAPPROC( i, cyg_uint32, 5, get_i );
            SAFEPROC( i, cyg_uint32, 4, get_i );
            TRAPPROC( i, cyg_uint32, 6, get_i );
            TRAPPROC( i, cyg_uint32, 7, get_i );
            SAFEPROC( i, cyg_uint32, 0, get_i );

            TRAPPROC( l, cyg_uint64, 4, get_ll );
            SAFEPROC( l, cyg_uint64, 0, get_ll );
            TRAPPROC( l, cyg_uint64, 1, get_ll );
            SAFEPROC( l, cyg_uint64, 8, get_ll );

            TRAPPROC( s, cyg_uint16, 1, get_splus );
            SAFEPROC( s, cyg_uint16, 2, get_splus );
            TRAPPROC( s, cyg_uint16, 3, get_splus );
            SAFEPROC( s, cyg_uint16, 4, get_splus );
        }

        CYG_TEST_PASS( "Mixture of accesses OK" );
    }
}

// -------------------------------------------------------------------------

externC void
skip_exception_handler(CYG_ADDRWORD vector, CYG_ADDRWORD data,
                                   CYG_ADDRWORD stackpointer);

externC void
fail_exception_handler(CYG_ADDRWORD vector, CYG_ADDRWORD data,
                                   CYG_ADDRWORD stackpointer);

// -------------------------------------------------------------------------

void sparc_ex_main( void )
{
    int i;

    CYG_TEST_INIT();

    for ( i = CYGNUM_HAL_EXCEPTION_MIN; i <= CYGNUM_HAL_EXCEPTION_MAX; i++ ){
        int j;
        HAL_TRANSLATE_VECTOR( i, j );
        HAL_INTERRUPT_ATTACH( j, &fail_exception_handler, j, 0 );
        // we must also ensure that eCos handles the exception;
        // do not drop into CygMon or equivalent.
        // Leave USER_TRAP undisturbed so that breakpoints work.
        if ( CYGNUM_HAL_VECTOR_USER_TRAP != i ) {
            extern void hal_default_exception_vsr( void );
            HAL_VSR_SET( i, (CYG_ADDRESS)hal_default_exception_vsr, NULL );
        }
    }

    HAL_TRANSLATE_VECTOR( CYGNUM_HAL_VECTOR_UNALIGNED, i );
    HAL_INTERRUPT_DETACH( i, &fail_exception_handler );
    HAL_INTERRUPT_ATTACH( i, &skip_exception_handler, i, 0 );

    CYG_TEST_INFO( "Vectors attached OK; calling do_test" );

    do_test();

    CYG_TEST_EXIT( "Done" );
}

// -------------------------------------------------------------------------
externC void
skip_exception_handler(CYG_ADDRWORD vector, CYG_ADDRWORD data,
                                   CYG_ADDRWORD stackpointer)
{
    HAL_SavedRegisters *save;
    HAL_FrameStructure *frame;

    HAL_FLUSH_REGISTERS_TO_STACK();

    save = (HAL_SavedRegisters *) stackpointer;
    frame = (HAL_FrameStructure *) (save + 1); // immediately after

    // now, this is the invokation environment when this saved regset
    // was created (copied from hal_xvsr.S):
    //  ! here,locals have been set up as follows:
    //  ! %l0 = psr (with this CWP/window-level in it)
    //  ! %l1 = pc
    //  ! %l2 = npc
    //  ! %l3 = vector number (16-25 for traps)
    //  ! and we are in our own register window, though it is likely that
    //  ! the next one will need to be saved before we can use it:
    //  ! ie. this one is the invalid register window.
    // and the intention is that we can mess therewith:

    // Check we're not in a trap loop
    if ( trap == save->li.l[1] ) {
        same++;
        if ( 10 < same )
            CYG_TEST_FAIL_EXIT( "Repeated trap" );
    }
    else // restart the count
       same = 0;

    // and record it
    trap = save->li.l[1];
    tcount++;

    // now step on so that we return to the instruction after:
    save->li.l[1] = save->li.l[2]; // PC := NPC
    save->li.l[2] += 4;            // NPC += 4

    // that's all.
}

externC void
fail_exception_handler(CYG_ADDRWORD vector, CYG_ADDRWORD data,
                                   CYG_ADDRWORD stackpointer)
{
    HAL_FLUSH_REGISTERS_TO_STACK();
    CYG_TEST_FAIL_EXIT( "Other exception handler called" );
}

// -------------------------------------------------------------------------

externC void
#ifdef CYGPKG_KERNEL
cyg_user_start( void )
#else
cyg_start( void )
#endif
{
    sparc_ex_main();
}

// -------------------------------------------------------------------------

cyg_uint64 get_ll( cyg_uint64 *p )
{
    return *p;
}

cyg_uint64 get_llplus( cyg_uint64 *p )
{
    cyg_uint64 ll = 0l, v;
    ll = (cyg_uint32)p;
    ll++;
    v = *p;
    v^= ll;
    return v;
}

cyg_uint32 get_i( cyg_uint32 *p )
{
    return *p;
}

cyg_uint32 get_iplus( cyg_uint32 *p )
{
    cyg_uint32 i = 0, v;
    i = (cyg_uint32)p;
    i++;
    v = *p;
    v^= i;
    return v;
}

cyg_uint16 get_s( cyg_uint16 *p )
{
    return *p;
}

cyg_uint16 get_splus( cyg_uint16 *p )
{
    cyg_uint16 s = 0, v;
    s = (cyg_uint16)(0xffff & (cyg_uint32)p);
    s++;
    v = *p;
    v^= s;
    return v;
}

// -------------------------------------------------------------------------

/* EOF sparc_ex.c */