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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2013-03-24 17:28:38 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2013-03-24 17:28:38 +0000 |
commit | 504178ba1726406e45d21a2824b34f216ee47af3 (patch) | |
tree | dbd550cd5a34204b88b0edb41f133fea7a181433 /nuttx/arch/arm/src/nuc1xx/nuc_userspace.c | |
parent | 94d420845331bad3ee2aa992f58fa8d31afe9f01 (diff) | |
download | px4-nuttx-504178ba1726406e45d21a2824b34f216ee47af3.tar.gz px4-nuttx-504178ba1726406e45d21a2824b34f216ee47af3.tar.bz2 px4-nuttx-504178ba1726406e45d21a2824b34f216ee47af3.zip |
Add kernel build support for Stellaris, Kinetis, LPC43, and NUC1xx MCUs
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5781 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/arm/src/nuc1xx/nuc_userspace.c')
-rw-r--r-- | nuttx/arch/arm/src/nuc1xx/nuc_userspace.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/nuc1xx/nuc_userspace.c b/nuttx/arch/arm/src/nuc1xx/nuc_userspace.c new file mode 100644 index 000000000..0a60059ba --- /dev/null +++ b/nuttx/arch/arm/src/nuc1xx/nuc_userspace.c @@ -0,0 +1,114 @@ +/**************************************************************************** + * arch/arm/src/nuc1xx/nuc_userspace.c + * + * Copyright (C) 2013 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 <assert.h> + +#include <nuttx/userspace.h> + +#include "nuc_userspace.h" + +#ifdef CONFIG_NUTTX_KERNEL + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nuc_userspace + * + * Description: + * For the case of the separate user-/kernel-space build, perform whatever + * platform specific initialization of the user memory is required. + * Normally this just means initializing the user space .data and .bss + * segments. + * + ****************************************************************************/ + +void nuc_userspace(void) +{ + uint8_t *src; + uint8_t *dest; + uint8_t *end; + + /* Clear all of user-space .bss */ + + DEBUGASSERT(USERSPACE->us_bssstart != 0 && USERSPACE->us_bssend != 0 && + USERSPACE->us_bssstart <= USERSPACE->us_bssend); + + dest = (uint8_t*)USERSPACE->us_bssstart; + end = (uint8_t*)USERSPACE->us_bssend; + + while (dest != end) + { + *dest++ = 0; + } + + /* Initialize all of user-space .data */ + + DEBUGASSERT(USERSPACE->us_datasource != 0 && + USERSPACE->us_datastart != 0 && USERSPACE->us_dataend != 0 && + USERSPACE->us_datastart <= USERSPACE->us_dataend); + + src = (uint8_t*)USERSPACE->us_datasource; + dest = (uint8_t*)USERSPACE->us_datastart; + end = (uint8_t*)USERSPACE->us_dataend; + + while (dest != end) + { + *dest++ = *src++; + } +} + +#endif /* CONFIG_NUTTX_KERNEL */ + |