112 lines
4.0 KiB
C
112 lines
4.0 KiB
C
/************************************************************************************
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* configs/stm32f4discovery/src/stm32_ostest.c
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*
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* Copyright (C) 2016 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 <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include <debug.h>
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#include <nuttx/irq.h>
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#include <arch/board/board.h>
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#include "up_arch.h"
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#include "up_internal.h"
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#include "stm32f4discovery.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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#if defined(CONFIG_ARCH_FPU) && !defined(CONFIG_EXAMPLES_OSTEST_FPUTESTDISABLE) && \
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defined(CONFIG_EXAMPLES_OSTEST_FPUSIZE) && defined(CONFIG_SCHED_WAITPID) && \
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!defined(CONFIG_DISABLE_SIGNALS)
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# define HAVE_FPU 1
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#endif
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#ifdef HAVE_FPU
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#if CONFIG_EXAMPLES_OSTEST_FPUSIZE != (4*SW_FPU_REGS)
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# error "CONFIG_EXAMPLES_OSTEST_FPUSIZE has the wrong size"
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#endif
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/************************************************************************************
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* Private Data
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************************************************************************************/
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static uint32_t g_saveregs[XCPTCONTEXT_REGS];
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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/* Given an array of size CONFIG_EXAMPLES_OSTEST_FPUSIZE, this function will return
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* the current FPU registers.
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*/
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void arch_getfpu(FAR uint32_t *fpusave)
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{
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irqstate_t flags;
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/* Take a snapshot of the thread context right now */
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flags = enter_critical_section();
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up_saveusercontext(g_saveregs);
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/* Return only the floating register values */
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memcpy(fpusave, &g_saveregs[REG_S0], (4*SW_FPU_REGS));
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leave_critical_section(flags);
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}
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/* Given two arrays of size CONFIG_EXAMPLES_OSTEST_FPUSIZE this function
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* will compare them and return true if they are identical.
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*/
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bool arch_cmpfpu(FAR const uint32_t *fpusave1, FAR const uint32_t *fpusave2)
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{
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return memcmp(fpusave1, fpusave2, (4*SW_FPU_REGS)) == 0;
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}
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#endif /* HAVE_FPU */
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