c3b406826e
Squashed commit of the following:
Change all remaining occurrences of SAMDL to SAMD2L2.
configs/: Change all remaining occurrences of SAMDL to SAMD2L2
configs/: Change all occurrences of CONFIG_SAMDL_* to CONFIG_SAMD2L2_*
arch/arm/src and include: Rename all directories from samdl to samd2l2. Change all configuration variable names and other usage from SAMDL to SAMD2L2.
114 lines
4.1 KiB
C
114 lines
4.1 KiB
C
/****************************************************************************
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* arch/arm/src/samd2l2/sam_userspace.c
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*
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* Copyright (C) 2014 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 <assert.h>
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#include <nuttx/userspace.h>
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#include "sam_userspace.h"
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#ifdef CONFIG_BUILD_PROTECTED
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sam_userspace
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*
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* Description:
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* For the case of the separate user-/kernel-space build, perform whatever
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* platform specific initialization of the user memory is required.
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* Normally this just means initializing the user space .data and .bss
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* segments.
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*
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****************************************************************************/
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void sam_userspace(void)
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{
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uint8_t *src;
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uint8_t *dest;
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uint8_t *end;
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/* Clear all of user-space .bss */
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DEBUGASSERT(USERSPACE->us_bssstart != 0 && USERSPACE->us_bssend != 0 &&
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USERSPACE->us_bssstart <= USERSPACE->us_bssend);
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dest = (uint8_t *)USERSPACE->us_bssstart;
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end = (uint8_t *)USERSPACE->us_bssend;
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while (dest != end)
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{
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*dest++ = 0;
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}
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/* Initialize all of user-space .data */
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DEBUGASSERT(USERSPACE->us_datasource != 0 &&
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USERSPACE->us_datastart != 0 && USERSPACE->us_dataend != 0 &&
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USERSPACE->us_datastart <= USERSPACE->us_dataend);
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src = (uint8_t *)USERSPACE->us_datasource;
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dest = (uint8_t *)USERSPACE->us_datastart;
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end = (uint8_t *)USERSPACE->us_dataend;
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while (dest != end)
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{
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*dest++ = *src++;
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}
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}
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#endif /* CONFIG_BUILD_PROTECTED */
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