Mercurial > ecos-v3_0-branch
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 |
| parents | |
| children | 443894e2e912 |
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new file mode 100644 --- /dev/null +++ b/packages/kernel/current/tests/kcache1.c @@ -0,0 +1,206 @@ +/*================================================================= +// +// 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 */
