04a561a8b4
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4427 42af7a65-404d-4744-a932-0658087f49c3
294 lines
8.8 KiB
C
294 lines
8.8 KiB
C
/***********************************************************************
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* apps/examples/ostest/fpu.c
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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***********************************************************************/
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/***********************************************************************
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* Included Files
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***********************************************************************/
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#include <nuttx/config.h>
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#include <sys/wait.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <sched.h>
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#include "ostest.h"
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/***********************************************************************
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* Pre-processor definitions
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***********************************************************************/
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/* Configuration *******************************************************/
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#undef HAVE_FPU
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#ifdef CONFIG_ARCH_FPU
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# if defined(CONFIG_EXAMPLES_OSTEST_FPUSIZE) && defined(CONFIG_SCHED_WAITPID) && !defined(CONFIG_DISABLE_SIGNALS)
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# define HAVE_FPU 1
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# else
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# ifndef CONFIG_EXAMPLES_OSTEST_FPUSIZE
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# warning "FPU test not built; CONFIG_EXAMPLES_OSTEST_FPUSIZE not defined"
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# endif
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# ifndef CONFIG_SCHED_WAITPID
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# warning "FPU test not built; CONFIG_SCHED_WAITPID not defined"
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# endif
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# ifdef CONFIG_DISABLE_SIGNALS
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# warning "FPU test not built; CONFIG_DISABLE_SIGNALS defined"
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# endif
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# endif
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#endif
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#ifdef HAVE_FPU
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#ifndef CONFIG_EXAMPLES_OSTEST_FPULOOPS
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# define CONFIG_EXAMPLES_OSTEST_FPULOOPS 16
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#endif
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#ifndef CONFIG_EXAMPLES_OSTEST_FPUMSDELAY
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# define CONFIG_EXAMPLES_OSTEST_FPUMSDELAY 750
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#endif
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#ifndef CONFIG_EXAMPLES_OSTEST_FPUPRIORITY
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# define CONFIG_EXAMPLES_OSTEST_FPUPRIORITY SCHED_PRIORITY_DEFAULT
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#endif
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#ifndef CONFIG_EXAMPLES_OSTEST_FPUSTACKSIZE
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# define CONFIG_EXAMPLES_OSTEST_FPUSTACKSIZE 2048
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#endif
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/* Other defintions ****************************************************/
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/* We'll keep all data using 32-bit values only to force 32-bit alignment.
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* This logic has not real notion of the underlying representation.
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*/
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#define FPU_WORDSIZE ((CONFIG_EXAMPLES_OSTEST_FPUSIZE+3)>>2)
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#ifndef NULL
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# define NULL (void*)0
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#endif
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/***********************************************************************
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* External Dependencies
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***********************************************************************/
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/* This test is very dependent on support provided by the chip/board-
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* layer logic. In particular, it expects the following functions
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* to be provided:
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*/
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/* Given an array of size CONFIG_EXAMPLES_OSTEST_FPUSIZE, this function
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* will return the current FPU registers.
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*/
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extern void arch_getfpu(FAR uint32_t *fpusave);
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/* Given two arrays of size CONFIG_EXAMPLES_OSTEST_FPUSIZE this
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* function will compare then an return true if they are identical.
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*/
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extern bool arch_cmpfpu(FAR const uint32_t *fpusave1,
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FAR const uint32_t *fpusave2);
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/***********************************************************************
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* Private Data
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***********************************************************************/
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static uint8_t g_fpuno;
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/***********************************************************************
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* Private Functions
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***********************************************************************/
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static void fpu_dump(FAR uint32_t *buffer, FAR const char *msg)
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{
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int i, j, k;
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printf("%s (%p):\n", msg, buffer);
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for (i = 0; i < FPU_WORDSIZE; i += 8)
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{
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printf(" %04x: ", i);
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for (j = 0; j < 8; j++)
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{
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k = i + j;
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if (k < FPU_WORDSIZE)
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{
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printf("%08x ", buffer[k]);
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}
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else
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{
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printf("\n");
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break;
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}
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}
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printf("\n");
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}
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}
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static int fpu_task(int argc, char *argv[])
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{
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uint32_t fpusave1[FPU_WORDSIZE];
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uint32_t fpusave2[FPU_WORDSIZE];
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double val1;
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double val2;
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double val3;
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double val4;
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int id;
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int i;
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/* Which are we? */
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sched_lock();
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id = (int)(++g_fpuno);
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sched_unlock();
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/* Seed the flowing point values */
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val1 = (double)id;
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for (i = 0; i < CONFIG_EXAMPLES_OSTEST_FPULOOPS; i++)
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{
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printf("FPU#%d: pass %d\n", id, i+1);
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fflush(stdout);
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/* Set the FPU register save arrays to a known-but-illogical values so
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* that we can verify that reading of the registers actually occurs.
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*/
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memset(fpusave1, 0xff, sizeof(fpusave1));
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memset(fpusave2, 0xff, sizeof(fpusave1));
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/* Prevent context switches while we set up some stuff */
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sched_lock();
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/* Do some trivial floating point operations that should cause some
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* changes to floating point resters
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*/
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val4 = 3.1415926 * val1; /* Multiple by Pi */
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val3 = val4 + 1.61803398874; /* Add the golden ratio */
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val2 = val3 / 2.7182; /* Divide by Euler's constant */
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val1 = val2 + 1.0; /* Plus one */
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/* Sample the floating point registers */
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arch_getfpu(fpusave1);
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/* Re-read and verify the FPU registers consistently without corruption */
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arch_getfpu(fpusave2);
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if (!arch_cmpfpu(fpusave1, fpusave2))
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{
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printf("ERROR FPU#%d: fpusave1 and fpusave2 do not match\n", id);
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fpu_dump(fpusave1, "Values after math operations (fpusave1)");
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fpu_dump(fpusave2, "Values after verify re-read (fpusave2)");
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return EXIT_FAILURE;
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}
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/* Now unlock and sleep for a while -- this should result in some context switches */
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sched_unlock();
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usleep(CONFIG_EXAMPLES_OSTEST_FPUMSDELAY * 1000);
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/* Several context switches should have occurred. Now verify that the floating
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* point registers are still correctly set.
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*/
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arch_getfpu(fpusave2);
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if (!arch_cmpfpu(fpusave1, fpusave2))
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{
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printf("ERROR FPU#%d: fpusave1 and fpusave2 do not match\n", id);
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fpu_dump(fpusave1, "Values before waiting (fpusave1)");
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fpu_dump(fpusave2, "Values after waiting (fpusave2)");
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return EXIT_FAILURE;
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}
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}
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printf("FPU#%d: Succeeded\n", id);
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fflush(stdout);
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return EXIT_SUCCESS;
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}
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#endif /* HAVE_FPU */
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/***********************************************************************
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* Private Functions
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***********************************************************************/
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void fpu_test(void)
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{
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#ifdef HAVE_FPU
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pid_t task1;
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pid_t task2;
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int statloc;
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/* Start two two tasks */
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g_fpuno = 0;
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printf("Starting task FPU#1\n");
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task1 = TASK_CREATE("FPU#1", CONFIG_EXAMPLES_OSTEST_FPUPRIORITY, CONFIG_EXAMPLES_OSTEST_FPUSTACKSIZE, fpu_task, NULL);
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if (task1 < 0)
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{
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printf("fpu_test: ERROR Failed to start task FPU#1\n");
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}
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else
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{
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printf("fpu_test: Started task FPU#1 at PID=%d\n", task1);
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}
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fflush(stdout);
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usleep(250);
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printf("Starting task FPU#2\n");
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task2 = TASK_CREATE("FPU#2", CONFIG_EXAMPLES_OSTEST_FPUPRIORITY, CONFIG_EXAMPLES_OSTEST_FPUSTACKSIZE, fpu_task, NULL);
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if (task2 < 0)
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{
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printf("fpu_test: ERROR Failed to start task FPU#1\n");
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}
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else
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{
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printf("fpu_test: Started task FPU#2 at PID=%d\n", task2);
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}
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/* Wait for each task to complete */
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fflush(stdout);
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(void)waitpid(task1, &statloc, 0);
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(void)waitpid(task2, &statloc, 0);
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#else
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printf("fpu_test: ERROR: The FPU test is not properly configured\n");
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#endif
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printf("fpu_test: Returning\n");
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}
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