188a76f1f9
Gregory Nutt has submitted the SGA and we can migrate the licenses to Apache. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/****************************************************************************
|
|
* arch/arm/src/imxrt/imxrt_userspace.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdint.h>
|
|
#include <assert.h>
|
|
|
|
#include <nuttx/userspace.h>
|
|
|
|
#include "imxrt_mpuinit.h"
|
|
#include "imxrt_userspace.h"
|
|
|
|
#ifdef CONFIG_BUILD_PROTECTED
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: imxrt_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.
|
|
*
|
|
* Assumptions:
|
|
* The D-Cache has not yet been enabled.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void imxrt_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_BUILD_PROTECTED */
|