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/*=================================================================

//

//        sparc_ex.c

//

//        SPARC HAL exception and register manipulation test

//

//==========================================================================

// ####ECOSGPLCOPYRIGHTBEGIN####

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

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 or (at your option) any later

// version.

//

// eCos is distributed in the hope that it will be useful, but WITHOUT

// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License

// along with eCos; if not, write to the Free Software Foundation, Inc.,

// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

//

// As a special exception, if other files instantiate templates or use

// macros or inline functions from this file, or you compile this file

// and link it with other works to produce a work based on this file,

// this file does not by itself cause the resulting work to be covered by

// the GNU General Public License. However the source code for this file

// must still be made available in accordance with section (3) of the GNU

// General Public License v2.

//

// This exception does not invalidate any other reasons why a work based

// on this file might be covered by the GNU General Public License.

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

// ####ECOSGPLCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):     dsm

// Contributors:    dsm, nickg

// Date:          1998-06-18

//####DESCRIPTIONEND####

*/

#include <pkgconf/system.h>

#include <pkgconf/hal.h>

#include <cyg/infra/cyg_type.h>

#include <cyg/infra/testcase.h>

#include <cyg/hal/hal_arch.h>

#include <cyg/hal/hal_intr.h>

#include <pkgconf/infra.h>

#ifdef CYGDBG_USE_TRACING

#define OUTER_REPEATS 1

#define SIM_REPEATS  10

#define HW_REPEATS 1000 

#else

#define OUTER_REPEATS 10

#define SIM_REPEATS  100

#define HW_REPEATS 10000 

#endif // using tracing to slow everything down

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

// These routines are used to cause an alignment trap; the compiler is too

// darned clever by half, if you try to inline this stuff as macros it uses

// different instruction sequences and register pairs.  This makes for a

// less thorough test, but there's no option other than writing a LOT of

// assembler code.

// Further, with -O3, the compiler inlines these anyway and so makes

// non-trapping code.  So they are now at the end, to prevent this.

extern cyg_uint64 get_ll( cyg_uint64 *p );

extern cyg_uint64 get_llplus( cyg_uint64 *p );

extern cyg_uint32 get_i( cyg_uint32 *p );

extern cyg_uint32 get_iplus( cyg_uint32 *p );

extern cyg_uint16 get_s( cyg_uint16 *p );

extern cyg_uint16 get_splus( cyg_uint16 *p );

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

// Some memory to read in more-or-less aligned manners.

#define L1 (0x123456789abcdef0l)

#define L2 (0xfedcba9876543210l)

static cyg_uint64 a[ 2 ] = {

    L1,

    L2

};

#define M32 (0x00000000ffffffffl)

#define M16 (0x000000000000ffffl)

#define M8  (0x00000000000000ffl)

volatile cyg_uint32 trap = 0;

volatile cyg_uint32 same = 0;

volatile cyg_uint32 tcount = 0;

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

// This macro invokes a routine then checks that a suitable trap occurred.

// It expects the instruction simply to be skipped, rather than the trap

// _handled_ or the unaligned access to be _emulated_ in any way.  This

// test is just a proof that we could write such a handler.

#define TRAPPROC( _var_, _type_, _align_, _proc_ )                         \

CYG_MACRO_START                                                            \

    otrap = trap;                                                          \

    otcount = tcount;                                                      \

    _var_ = _proc_( (_type_ *)(cp + (_align_)) );                          \

    CYG_TEST_CHECK( trap != otrap || same > 0,                             \

                    "No trap [" #_type_ ":" #_align_ "," #_proc_ "]" );    \

    CYG_TEST_CHECK( same < 20,                                             \

        "Undetected trap loop[" #_type_ ":" #_align_ "," #_proc_ "]" );    \

    CYG_TEST_CHECK( tcount > otcount,                                      \

        "No trap counted [" #_type_ ":" #_align_ "," #_proc_ "]" );        \

    CYG_TEST_CHECK( (tcount - 1) <= otcount,                               \

        "Tcount overinc [" #_type_ ":" #_align_ "," #_proc_ "]" );         \

CYG_MACRO_END

// and this one expects no trap to occur:

#define SAFEPROC( _var_, _type_, _align_, _proc_ )                         \

CYG_MACRO_START                                                            \

    trap = 0;                                                              \

    otcount = tcount;                                                      \

    _var_ = _proc_( (_type_ *)(cp + (_align_)) );                          \

    CYG_TEST_CHECK( 0 == trap,                                             \

                        "Trap [" #_type_ ":" #_align_ "," #_proc_ "]" );   \

    CYG_TEST_CHECK( tcount == otcount,                                     \

            "Trap counted [" #_type_ ":" #_align_ "," #_proc_ "]" );       \

CYG_MACRO_END

static void do_test( void )

{

    cyg_uint32 *ip = (cyg_uint32 *)a;

    cyg_uint16 *sp = (cyg_uint16 *)a;

    cyg_uint8  *cp = (cyg_uint8  *)a;

    cyg_uint64 l;

    cyg_uint32 i;

    cyg_uint16 s;

    cyg_uint8  c;

    cyg_int32 z, repeats;

    cyg_uint32 otrap;

    cyg_uint32 otcount;

    otrap = trap = 0;

    otcount = tcount;

    // First test interestingly aligned accesses that are legal.

    l = a[0];  CYG_TEST_CHECK( L1 == l, "a[0] read bad" );

    l = a[1];  CYG_TEST_CHECK( L2 == l, "a[1] read bad" );

    i = ip[0];  CYG_TEST_CHECK( ((L1 >> 32) & M32) == i, "ip[0]" );

    i = ip[1];  CYG_TEST_CHECK( ((L1      ) & M32) == i, "ip[1]" );

    i = ip[2];  CYG_TEST_CHECK( ((L2 >> 32) & M32) == i, "ip[2]" );

    i = ip[3];  CYG_TEST_CHECK( ((L2      ) & M32) == i, "ip[3]" );

    s = sp[0];  CYG_TEST_CHECK( ((L1 >> 48) & M16) == s, "sp[0]" );

    s = sp[1];  CYG_TEST_CHECK( ((L1 >> 32) & M16) == s, "sp[1]" );

    s = sp[2];  CYG_TEST_CHECK( ((L1 >> 16) & M16) == s, "sp[2]" );

    s = sp[3];  CYG_TEST_CHECK( ((L1      ) & M16) == s, "sp[3]" );

    s = sp[4];  CYG_TEST_CHECK( ((L2 >> 48) & M16) == s, "sp[4]" );

    s = sp[5];  CYG_TEST_CHECK( ((L2 >> 32) & M16) == s, "sp[5]" );

    s = sp[6];  CYG_TEST_CHECK( ((L2 >> 16) & M16) == s, "sp[6]" );

    s = sp[7];  CYG_TEST_CHECK( ((L2      ) & M16) == s, "sp[7]" );

    c = cp[0];  CYG_TEST_CHECK( ((L1 >> 56) & M8) == c, "cp[0]" );

    c = cp[1];  CYG_TEST_CHECK( ((L1 >> 48) & M8) == c, "cp[1]" );

    c = cp[2];  CYG_TEST_CHECK( ((L1 >> 40) & M8) == c, "cp[2]" );

    c = cp[3];  CYG_TEST_CHECK( ((L1 >> 32) & M8) == c, "cp[3]" );

    c = cp[4];  CYG_TEST_CHECK( ((L1 >> 24) & M8) == c, "cp[4]" );

    c = cp[5];  CYG_TEST_CHECK( ((L1 >> 16) & M8) == c, "cp[5]" );

    c = cp[6];  CYG_TEST_CHECK( ((L1 >>  8) & M8) == c, "cp[6]" );

    c = cp[7];  CYG_TEST_CHECK( ((L1      ) & M8) == c, "cp[7]" );

    c = cp[8];  CYG_TEST_CHECK( ((L2 >> 56) & M8) == c, "cp[8]" );

    c = cp[9];  CYG_TEST_CHECK( ((L2 >> 48) & M8) == c, "cp[9]" );

    c = cp[10]; CYG_TEST_CHECK( ((L2 >> 40) & M8) == c, "cp[10]" );

    c = cp[11]; CYG_TEST_CHECK( ((L2 >> 32) & M8) == c, "cp[11]" );

    c = cp[12]; CYG_TEST_CHECK( ((L2 >> 24) & M8) == c, "cp[12]" );

    c = cp[13]; CYG_TEST_CHECK( ((L2 >> 16) & M8) == c, "cp[13]" );

    c = cp[14]; CYG_TEST_CHECK( ((L2 >>  8) & M8) == c, "cp[14]" );

    c = cp[15]; CYG_TEST_CHECK( ((L2      ) & M8) == c, "cp[15]" );

    CYG_TEST_CHECK( 0 == trap, "Traps occurred (legal accesses)" );

    CYG_TEST_CHECK( tcount == otcount, "Traps counted (legal accesses)" );

    CYG_TEST_PASS( "Aligned accesses OK" );

    for ( z = OUTER_REPEATS; z > 0; z-- ) {

        for ( repeats = (cyg_test_is_simulator ? SIM_REPEATS : HW_REPEATS) ;

              repeats > 0 ; repeats-- ) {

            TRAPPROC( l, cyg_uint64, 4, get_llplus );

            TRAPPROC( l, cyg_uint64, 5, get_llplus );

            TRAPPROC( l, cyg_uint64, 6, get_llplus );

            TRAPPROC( l, cyg_uint64, 7, get_llplus );

            TRAPPROC( l, cyg_uint64, 4, get_ll );

            TRAPPROC( l, cyg_uint64, 1, get_ll );

            TRAPPROC( l, cyg_uint64, 2, get_ll );

            TRAPPROC( l, cyg_uint64, 3, get_ll );

            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 */