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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2013-02-16 16:32:19 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2013-02-16 16:32:19 +0000 |
commit | b78eb3e4bbd9a44cb38e6cd5f7fdde4e22a183f4 (patch) | |
tree | 82e3a9b70e21bda79f4a26bf36dd755dcb4160a9 /nuttx/arch/arm/src/armv6-m/up_systemreset.c | |
parent | 54c9fa75c9466f4676d12105dbf4026aeb92adb7 (diff) | |
download | px4-nuttx-b78eb3e4bbd9a44cb38e6cd5f7fdde4e22a183f4.tar.gz px4-nuttx-b78eb3e4bbd9a44cb38e6cd5f7fdde4e22a183f4.tar.bz2 px4-nuttx-b78eb3e4bbd9a44cb38e6cd5f7fdde4e22a183f4.zip |
First cut at support for Cortex-M0
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5655 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/arm/src/armv6-m/up_systemreset.c')
-rw-r--r-- | nuttx/arch/arm/src/armv6-m/up_systemreset.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/armv6-m/up_systemreset.c b/nuttx/arch/arm/src/armv6-m/up_systemreset.c new file mode 100644 index 000000000..a02a0abd2 --- /dev/null +++ b/nuttx/arch/arm/src/armv6-m/up_systemreset.c @@ -0,0 +1,78 @@ +/**************************************************************************** + * arch/arm/src/armv6-m/up_systemreset.c + * + * Copyright (C) 2013 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * Darcy Gong + * + * 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 "up_arch.h" +#include "nvic.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + + /**************************************************************************** + * Public Types + ****************************************************************************/ + +/**************************************************************************** + * Public functions + ****************************************************************************/ + +void up_systemreset(void) +{ + uint32_t regval; + + /* Set up for the system reset, retaining the priority group from the + * the AIRCR register. + */ + + regval = ((0x5fa << SYSCON_AIRCR_VECTKEY_SHIFT) | SYSCON_AIRCR_SYSRESETREQ); + putreg32(regval, ARMV6M_SYSCON_AIRCR); + + /* Ensure completion of memory accesses */ + + __asm volatile ("dsb"); + + /* Wait for the reset */ + + for (;;); +} |