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

//

//        kcache1.c

//

//        Cache timing 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 <cyg/hal/hal_arch.h>           // CYGNUM_HAL_STACK_SIZE_TYPICAL

#include <cyg/kernel/kapi.h>

#include <cyg/infra/testcase.h>

#include <cyg/hal/hal_cache.h>

#if defined(HAL_DCACHE_SIZE) || defined(HAL_UCACHE_SIZE)

#ifdef CYGVAR_KERNEL_COUNTERS_CLOCK

#ifdef CYGFUN_KERNEL_API_C

#include <cyg/infra/diag.h>

#include <cyg/hal/hal_intr.h>

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

// If the HAL does not supply this, we supply our own version

#ifndef HAL_DCACHE_PURGE_ALL

# ifdef HAL_DCACHE_SYNC

#define HAL_DCACHE_PURGE_ALL() HAL_DCACHE_SYNC()

# else

static cyg_uint8 dca[HAL_DCACHE_SIZE + HAL_DCACHE_LINE_SIZE*2];

#define HAL_DCACHE_PURGE_ALL()                                          \

CYG_MACRO_START                                                         \

    volatile cyg_uint8 *addr = &dca[HAL_DCACHE_LINE_SIZE];              \

    volatile cyg_uint8 tmp = 0;                                         \

    int i;                                                              \

    for( i = 0; i < HAL_DCACHE_SIZE; i += HAL_DCACHE_LINE_SIZE )        \

    {                                                                   \

        tmp = addr[i];                                                  \

    }                                                                   \

CYG_MACRO_END

# endif

#endif

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

#define NTHREADS 1

#define STACKSIZE CYGNUM_HAL_STACK_SIZE_TYPICAL

static cyg_handle_t thread[NTHREADS];

static cyg_thread thread_obj[NTHREADS];

static char stack[NTHREADS][STACKSIZE];

#ifndef MAX_STRIDE

#define MAX_STRIDE 64

#endif

volatile char m[(HAL_DCACHE_SIZE/HAL_DCACHE_LINE_SIZE)*MAX_STRIDE];

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

static void time0(register cyg_uint32 stride)

{

    register cyg_uint32 j,k;

    cyg_tick_count_t count0, count1;

    cyg_ucount32 t;

    register char c;

    count0 = cyg_current_time();

    k = 0;

    if ( cyg_test_is_simulator )

        k = 3960;

    for(; k<4000;k++) {

        for(j=0; j<(HAL_DCACHE_SIZE/HAL_DCACHE_LINE_SIZE); j++) {

            c=m[stride*j];

        }

    }

    count1 = cyg_current_time();

    t = count1 - count0;

    diag_printf("stride=%d, time=%d\n", stride, t);

}

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

void time1(void)

{

    cyg_uint32 i;

    for(i=1; i<=MAX_STRIDE; i+=i) {

        time0(i);

    }

}

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

// With an ICache invalidate in the middle:

#ifdef HAL_ICACHE_INVALIDATE_ALL

static void time0II(register cyg_uint32 stride)

{

    register cyg_uint32 j,k;

    cyg_tick_count_t count0, count1;

    cyg_ucount32 t;

    register char c;

    count0 = cyg_current_time();

    k = 0;

    if ( cyg_test_is_simulator )

        k = 3960;

    for(; k<4000;k++) {

        for(j=0; j<(HAL_DCACHE_SIZE/HAL_DCACHE_LINE_SIZE); j++) {

            HAL_ICACHE_INVALIDATE_ALL();

            c=m[stride*j];

        }

    }

    count1 = cyg_current_time();

    t = count1 - count0;

    diag_printf("stride=%d, time=%d\n", stride, t);

}

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

void time1II(void)

{

    cyg_uint32 i;

    for(i=1; i<=MAX_STRIDE; i+=i) {

        time0II(i);

    }

}

#endif

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

// With a DCache invalidate in the middle:

// This is guaranteed to produce bogus timing results since interrupts

// have to be disabled to prevent accidental loss of state.

#ifdef HAL_DCACHE_INVALIDATE_ALL

static void time0DI(register cyg_uint32 stride)

{

    register cyg_uint32 j,k;

    volatile cyg_tick_count_t count0;

    cyg_tick_count_t count1;

    cyg_ucount32 t;

    register char c;

    register CYG_INTERRUPT_STATE oldints;

    count0 = cyg_current_time();

    HAL_DISABLE_INTERRUPTS(oldints);

    HAL_DCACHE_SYNC();

    k = 0;

    if ( cyg_test_is_simulator )

        k = 3960;

    for(; k<4000;k++) {

        for(j=0; j<(HAL_DCACHE_SIZE/HAL_DCACHE_LINE_SIZE); j++) {

            HAL_DCACHE_INVALIDATE_ALL();

            c=m[stride*j];

        }

    }

    HAL_RESTORE_INTERRUPTS(oldints);

    count1 = cyg_current_time();

    t = count1 - count0;

    diag_printf("stride=%d, time=%d\n", stride, t);

}

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

void time1DI(void)

{

    cyg_uint32 i;

    for(i=1; i<=MAX_STRIDE; i+=i) {

        time0DI(i);

    }

}

#endif

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

// This test could be improved by counting number of passes possible 

// in a given number of ticks.

static void entry0( cyg_addrword_t data )

{

    register CYG_INTERRUPT_STATE oldints;

#ifdef HAL_CACHE_UNIFIED

    HAL_DISABLE_INTERRUPTS(oldints);

    HAL_DCACHE_PURGE_ALL();             // rely on above definition

    HAL_UCACHE_INVALIDATE_ALL();

    HAL_UCACHE_DISABLE();

    HAL_RESTORE_INTERRUPTS(oldints);

    CYG_TEST_INFO("Cache off");

    time1();

    HAL_DISABLE_INTERRUPTS(oldints);

    HAL_DCACHE_PURGE_ALL();             // rely on above definition

    HAL_UCACHE_INVALIDATE_ALL();

    HAL_UCACHE_ENABLE();

    HAL_RESTORE_INTERRUPTS(oldints);

    CYG_TEST_INFO("Cache on");

    time1();

#ifdef HAL_DCACHE_INVALIDATE_ALL

    HAL_DISABLE_INTERRUPTS(oldints);

    HAL_DCACHE_PURGE_ALL();

    HAL_UCACHE_INVALIDATE_ALL();

    HAL_UCACHE_ENABLE();

    HAL_RESTORE_INTERRUPTS(oldints);

    CYG_TEST_INFO("Cache on: invalidate Cache (expect bogus timing)");

    time1DI();

#endif

#else // HAL_CACHE_UNIFIED

    HAL_DISABLE_INTERRUPTS(oldints);

    HAL_DCACHE_PURGE_ALL();

    HAL_ICACHE_INVALIDATE_ALL();

    HAL_DCACHE_INVALIDATE_ALL();

    HAL_ICACHE_DISABLE();

    HAL_DCACHE_DISABLE();

    HAL_RESTORE_INTERRUPTS(oldints);

    CYG_TEST_INFO("Dcache off Icache off");

    time1();

    HAL_DISABLE_INTERRUPTS(oldints);

    HAL_DCACHE_PURGE_ALL();

    HAL_ICACHE_INVALIDATE_ALL();

    HAL_DCACHE_INVALIDATE_ALL();

    HAL_ICACHE_DISABLE();

    HAL_DCACHE_ENABLE();

    HAL_RESTORE_INTERRUPTS(oldints);

    CYG_TEST_INFO("Dcache on  Icache off");

    time1();

    HAL_DISABLE_INTERRUPTS(oldints);

    HAL_DCACHE_PURGE_ALL();

    HAL_ICACHE_INVALIDATE_ALL();

    HAL_DCACHE_INVALIDATE_ALL();

    HAL_ICACHE_ENABLE();

    HAL_DCACHE_DISABLE();

    HAL_RESTORE_INTERRUPTS(oldints);

    CYG_TEST_INFO("Dcache off Icache on");

    time1();

    HAL_DISABLE_INTERRUPTS(oldints);

    HAL_DCACHE_PURGE_ALL();

    HAL_ICACHE_INVALIDATE_ALL();

    HAL_DCACHE_INVALIDATE_ALL();

    HAL_ICACHE_ENABLE();

    HAL_DCACHE_ENABLE();

    HAL_RESTORE_INTERRUPTS(oldints);

    CYG_TEST_INFO("Dcache on Icache on");

    time1();

    HAL_DISABLE_INTERRUPTS(oldints);

    HAL_DCACHE_PURGE_ALL();

    HAL_ICACHE_INVALIDATE_ALL();

    HAL_DCACHE_INVALIDATE_ALL();

    HAL_ICACHE_DISABLE();

    HAL_DCACHE_DISABLE();

    HAL_RESTORE_INTERRUPTS(oldints);

    CYG_TEST_INFO("Dcache off Icache off (again)");

    time1();

#if defined(HAL_DCACHE_INVALIDATE_ALL) || defined(HAL_ICACHE_INVALIDATE_ALL)

    HAL_DISABLE_INTERRUPTS(oldints);

    HAL_DCACHE_PURGE_ALL();

    HAL_ICACHE_INVALIDATE_ALL();

    HAL_DCACHE_INVALIDATE_ALL();

    HAL_ICACHE_ENABLE();

    HAL_DCACHE_ENABLE();

    HAL_RESTORE_INTERRUPTS(oldints);

    CYG_TEST_INFO("Dcache on Icache on (again)");

    time1();

#if defined(CYGPKG_HAL_MIPS)

    // In some architectures, the time taken for the next two tests is

    // very long, partly because HAL_XCACHE_INVALIDATE_ALL() is implemented

    // with a loop over the cache. Hence these tests take longer than the

    // testing infrastructure is prepared to wait. The simplest way to get

    // these tests to run quickly is to make them think they are running

    // under a simulator.

    // If the target actually is a simulator, skip the below - it's very

    // slow on the simulator, even with reduced loop counts.

    if (cyg_test_is_simulator)

        CYG_TEST_PASS_FINISH("End of test");

#if defined(CYGPKG_HAL_MIPS_TX49)

    // The TX49 has a large cache, and even with reduced loop count,

    // 90+ seconds elapses between each INFO output.

    CYG_TEST_PASS_FINISH("End of test");

#endif

    cyg_test_is_simulator = 1;

#endif    

#ifdef HAL_ICACHE_INVALIDATE_ALL

    HAL_DISABLE_INTERRUPTS(oldints);

    HAL_DCACHE_PURGE_ALL();

    HAL_ICACHE_INVALIDATE_ALL();

    HAL_DCACHE_INVALIDATE_ALL();

    HAL_ICACHE_ENABLE();

    HAL_DCACHE_ENABLE();

    HAL_RESTORE_INTERRUPTS(oldints);

    CYG_TEST_INFO("Dcache on Icache on: invalidate ICache each time");

    time1II();

#endif

#ifdef HAL_DCACHE_INVALIDATE_ALL

    HAL_DISABLE_INTERRUPTS(oldints);

    HAL_DCACHE_PURGE_ALL();

    HAL_ICACHE_INVALIDATE_ALL();

    HAL_DCACHE_INVALIDATE_ALL();

    HAL_ICACHE_ENABLE();

    HAL_DCACHE_ENABLE();

    HAL_RESTORE_INTERRUPTS(oldints);

    CYG_TEST_INFO("Dcache on Icache on: invalidate DCache (expect bogus times)");

    time1DI();

#endif

#endif // either INVALIDATE_ALL macro

#endif // HAL_CACHE_UNIFIED

    CYG_TEST_PASS_FINISH("End of test");

}

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

void kcache2_main( void )

{

    CYG_TEST_INIT();

    cyg_thread_create(4, entry0 , (cyg_addrword_t)0, "kcache1",

        (void *)stack[0], STACKSIZE, &thread[0], &thread_obj[0]);

    cyg_thread_resume(thread[0]);

    cyg_scheduler_start();

}

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

externC void

cyg_start( void )

{

    kcache2_main();

}

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

#else // def CYGFUN_KERNEL_API_C

#define N_A_MSG "Kernel C API layer disabled"

#endif // def CYGFUN_KERNEL_API_C

#else // def CYGVAR_KERNEL_COUNTERS_CLOCK

#define N_A_MSG "Kernel real-time clock disabled"

#endif // def CYGVAR_KERNEL_COUNTERS_CLOCK

#else // def HAL_DCACHE_SIZE

#define N_A_MSG "No caches defined"

#endif // def HAL_DCACHE_SIZE

#ifdef N_A_MSG

externC void

cyg_start( void )

{

    CYG_TEST_INIT();

    CYG_TEST_NA( N_A_MSG );

}

#endif // N_A_MSG

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

/* EOF kcache1.c */