120 lines
4.2 KiB
C
120 lines
4.2 KiB
C
/****************************************************************************
|
|
* arch/arm/src/kinetis/kinetis_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 "kinetis_mpuinit.h"
|
|
#include "kinetis_userspace.h"
|
|
|
|
#ifdef CONFIG_BUILD_PROTECTED
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: kinetis_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 kinetis_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++;
|
|
}
|
|
|
|
/* Configure the MPU to permit user-space access to its FLASH and RAM */
|
|
|
|
kinetis_mpuinitialize();
|
|
}
|
|
|
|
#endif /* CONFIG_BUILD_PROTECTED */
|
|
|