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Add a test to verify that FPU registers are properly saved and restored on context switches.

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4421 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2012-02-24 21:34:55 +00:00
parent ca1c8f6bfa
commit c7eae76899
2 changed files with 146 additions and 0 deletions
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4
configs/stm3240g-eval/src/Makefile
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@ -68,6 +68,10 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
CSRCS += up_nsh.c
endif
ifeq ($(CONFIG_ARCH_FPU),y)
CSRCS += up_ostest.c
endif
COBJS = $(CSRCS:.c=$(OBJEXT))
SRCS = $(ASRCS) $(CSRCS)

142
configs/stm3240g-eval/src/up_ostest.c Normal file
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@ -0,0 +1,142 @@
/************************************************************************************
* configs/stm3240g-eval/src/up_ostest.c
* arch/arm/src/board/up_ostest.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <debug.h>
#include <arch/irq.h>
#include <arch/board/board.h>
#include "up_arch.h"
#include "up_internal.h"
#include "stm3240g-internal.h"
/************************************************************************************
* Definitions
************************************************************************************/
/* Configuration ********************************************************************/
#undef HAVE_FPU
#if defined(CONFIG_ARCH_FPU) && defined(CONFIG_EXAMPLES_OSTEST_FPUSIZE) && \
defined(CONFIG_SCHED_WAITPID) && !defined(CONFIG_DISABLE_SIGNALS) && \
!defined(CONFIG_ARMV7M_CMNVECTOR)
# define HAVE_FPU 1
#endif
#ifdef HAVE_FPU
#if CONFIG_EXAMPLES_OSTEST_FPUSIZE != (4*SW_FPU_REGS)
# error "CONFIG_EXAMPLES_OSTEST_FPUSIZE has the wrong size"
#endif
/************************************************************************************
* Private Functions
************************************************************************************/
/************************************************************************************
* Public Functions
************************************************************************************/
/* Given a uint8_t array of size CONFIG_EXAMPLES_OSTEST_FPUSIZE, this
* function will return the current FPU registers.
*/
void arch_getfpu(FAR uint8_t *fpusave)
{
irqstate_t flags;
uint32_t regs[XCPTCONTEXT_REGS];
flags = irqsave();
up_savefpu(regs);
irqrestore(flags);
memcpy(fpusave, &regs[REG_S0], (4*SW_FPU_REGS));
}
/* Given a uint8_t array of size CONFIG_EXAMPLES_OSTEST_FPUSIZE, this
* function will set the current FPU regisers to match the provided
* register save set.
*/
void arch_setfpu(FAR const uint8_t *fpusave)
{
irqstate_t flags;
uint32_t regs[XCPTCONTEXT_REGS];
memcpy(&regs[REG_S0], fpusave, (4*SW_FPU_REGS));
flags = irqsave();
up_restorefpu(regs);
irqrestore(flags);
}
/* Given a uint8_t array of size CONFIG_EXAMPLES_OSTEST_FPUSIZE and a
* seed value, this function will set the FPU registers to a known
* values for testing purposes. The contents of the FPU registers
* must be uniqe for each sed value.
*/
void arch_initfpu(FAR uint8_t *fpusave, int seed)
{
FAR uint32_t *dest = (FAR uint32_t *)fpusave;
uint32_t mask = 0x01010101;
uint32_t incr = 0x01010101;
int i;
for (i = 0; i < 32; i++)
{
*dest = (uint32_t)seed ^ mask;
mask += incr;
}
}
/* Given two uint8_t arrays of size CONFIG_EXAMPLES_OSTEST_FPUSIZE this
* function will compare then an return true if they are identical.
*/
bool arch_cmpfpu(FAR const uint8_t *fpusave1, FAR const uint8_t *fpusave2)
{
return memcmp(fpusave1, fpusave2, (4*32)) == 0;
}
#endif /* HAVE_FPU */