diff packages/kernel/current/tests/kcache1.c @ 0:3111d98ba7b3 ecos-v1_1-release

Initial commit of eCos version 1.1
author jlarmour
date Tue, 11 May 1999 11:16:07 +0000
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children 443894e2e912
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+++ b/packages/kernel/current/tests/kcache1.c
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+/*=================================================================
+//
+//        kcache1.c
+//
+//        Cache timing test
+//
+//==========================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// Software distributed under the License is distributed on an "AS IS"
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the
+// License for the specific language governing rights and limitations under
+// the License.
+// 
+// The Original Code is eCos - Embedded Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998 Cygnus Solutions.  All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):     dsm
+// Contributors:    dsm, nickg
+// Date:          1998-06-18
+//####DESCRIPTIONEND####
+*/
+
+#include <cyg/kernel/kapi.h>
+
+#include <cyg/infra/testcase.h>
+
+#ifdef CYGVAR_KERNEL_COUNTERS_CLOCK
+#ifdef CYGFUN_KERNEL_API_C
+
+#include <cyg/infra/diag.h>
+#include <cyg/hal/hal_cache.h>
+
+// -------------------------------------------------------------------------
+// If the HAL does not supply this, we supply our own version
+
+#ifndef HAL_DCACHE_PURGE_ALL
+
+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
+
+// -------------------------------------------------------------------------
+
+#define NTHREADS 1
+#define STACKSIZE 4096
+
+static cyg_handle_t thread[NTHREADS];
+
+static cyg_thread thread_obj[NTHREADS];
+static char stack[NTHREADS][STACKSIZE];
+
+#define MAXSIZE 1<<18
+
+volatile char m[MAXSIZE];
+
+// -------------------------------------------------------------------------
+
+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();
+
+    for(k=0; 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<65; i+=i) {
+        time0(i);
+    }
+}
+
+// -------------------------------------------------------------------------
+// This test could be improved by counting number of passes possible 
+// in a given number of ticks.
+
+static void entry0( cyg_addrword_t data )
+{
+    HAL_DCACHE_PURGE_ALL();
+    HAL_ICACHE_INVALIDATE_ALL();
+    HAL_DCACHE_INVALIDATE_ALL();
+    HAL_ICACHE_DISABLE();
+    HAL_DCACHE_DISABLE();
+    CYG_TEST_INFO("Dcache off Icache off");
+    time1();
+
+    HAL_DCACHE_PURGE_ALL();
+    HAL_ICACHE_INVALIDATE_ALL();
+    HAL_DCACHE_INVALIDATE_ALL();
+    HAL_ICACHE_DISABLE();
+    HAL_DCACHE_ENABLE();
+    CYG_TEST_INFO("Dcache on  Icache off");
+    time1();
+
+    HAL_DCACHE_PURGE_ALL();
+    HAL_ICACHE_INVALIDATE_ALL();
+    HAL_DCACHE_INVALIDATE_ALL();
+    HAL_ICACHE_ENABLE();
+    HAL_DCACHE_DISABLE();
+    CYG_TEST_INFO("Dcache off Icache on");
+    time1();
+
+    HAL_DCACHE_PURGE_ALL();
+    HAL_ICACHE_INVALIDATE_ALL();
+    HAL_DCACHE_INVALIDATE_ALL();
+    HAL_ICACHE_ENABLE();
+    HAL_DCACHE_ENABLE();
+    CYG_TEST_INFO("Dcache on Icache on");
+    time1();
+
+
+    HAL_DCACHE_PURGE_ALL();
+    HAL_ICACHE_INVALIDATE_ALL();
+    HAL_DCACHE_INVALIDATE_ALL();
+    HAL_ICACHE_DISABLE();
+    HAL_DCACHE_DISABLE();
+    CYG_TEST_INFO("Dcache off Icache off");
+    time1();
+
+    
+    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
+
+#ifdef N_A_MSG
+externC void
+cyg_start( void )
+{
+    CYG_TEST_INIT();
+    CYG_TEST_PASS_FINISH("N/A: " N_A_MSG);
+}
+#endif // N_A_MSG
+
+// -------------------------------------------------------------------------
+/* EOF kcache1.c */