diff packages/hal/common/current/tests/cache.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
parents
children 443894e2e912
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--- /dev/null
+++ b/packages/hal/common/current/tests/cache.c
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+/*=================================================================
+//
+//        cache.c
+//
+//        HAL 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 <pkgconf/hal.h>
+
+#include <cyg/infra/testcase.h>
+
+#include <cyg/hal/hal_cache.h>
+
+// -------------------------------------------------------------------------
+
+#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 = 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 = 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( void )
+{
+    HAL_ICACHE_INVALIDATE_ALL();
+    HAL_DCACHE_INVALIDATE_ALL();
+    HAL_ICACHE_DISABLE();
+    HAL_DCACHE_DISABLE();
+    CYG_TEST_INFO("Dcache off Icache off");
+    time1();
+
+    HAL_ICACHE_INVALIDATE_ALL();
+    HAL_DCACHE_INVALIDATE_ALL();
+    HAL_ICACHE_DISABLE();
+    HAL_DCACHE_ENABLE();
+    CYG_TEST_INFO("Dcache on  Icache off");
+    time1();
+
+    HAL_ICACHE_INVALIDATE_ALL();
+    HAL_DCACHE_INVALIDATE_ALL();
+    HAL_ICACHE_ENABLE();
+    HAL_DCACHE_DISABLE();
+    CYG_TEST_INFO("Dcache off Icache on");
+    time1();
+
+    HAL_ICACHE_INVALIDATE_ALL();
+    HAL_DCACHE_INVALIDATE_ALL();
+    HAL_ICACHE_ENABLE();
+    HAL_DCACHE_ENABLE();
+    CYG_TEST_INFO("Dcache on Icache on");
+    time1();
+
+
+    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 cache_main( void )
+{
+    CYG_TEST_INIT();
+
+    entry0();
+
+}
+
+// -------------------------------------------------------------------------
+
+externC void
+cyg_start( void )
+{
+    cache_main();
+}
+
+// -------------------------------------------------------------------------
+/* EOF cache.c */