Add MPU support for the LPC17xx family
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5731 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
parent
229d3c4085
commit
7654076287
@ -216,6 +216,13 @@ config ARMV7M_MPU
|
||||
Build in support for the ARM Cortex-M3/4 Memory Protection Unit (MPU).
|
||||
Check your chip specifications first; not all Cortex-M3/4 chips support the MPU.
|
||||
|
||||
config ARMV7M_MPU_NREGIONS
|
||||
int "Number of MPU regions"
|
||||
default 8
|
||||
depends on ARMV7M_MPU
|
||||
---help---
|
||||
This is the number of protection regions supported by the MPU.
|
||||
|
||||
config ARCH_HAVE_LOWVECTORS
|
||||
bool
|
||||
|
||||
|
||||
@ -48,6 +48,11 @@
|
||||
/****************************************************************************
|
||||
* Pre-processor Definitions
|
||||
****************************************************************************/
|
||||
/* Configuration ************************************************************/
|
||||
|
||||
#ifndef CONFIG_ARMV7M_MPU_NREGIONS
|
||||
# define CONFIG_ARMV7M_MPU_NREGIONS 8
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Private Data
|
||||
@ -84,13 +89,14 @@ static uint8_t g_region;
|
||||
*
|
||||
* Assumptions:
|
||||
* - Regions are never deallocated
|
||||
* - Regions are only allocated early in initialization, so nothing
|
||||
* special is require;
|
||||
* - Regions are only allocated early in initialization, so no special
|
||||
* protection against re-entrancy is required;
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
unsigned int mpu_allocregion(void)
|
||||
{
|
||||
DEBUGASSERT(g_region < CONFIG_ARMV7M_MPU_NREGIONS);
|
||||
return (unsigned int)g_region++;
|
||||
}
|
||||
|
||||
|
||||
@ -63,6 +63,10 @@ ifeq ($(CONFIG_ARCH_MEMCPY),y)
|
||||
CMN_ASRCS += up_memcpy.S
|
||||
endif
|
||||
|
||||
ifeq ($(CONFIG_NUTTX_KERNEL),y)
|
||||
CMN_CSRCS += up_mpu.c
|
||||
endif
|
||||
|
||||
ifeq ($(CONFIG_NET),y)
|
||||
ifneq ($(CONFIG_LPC17_ETHERNET),y)
|
||||
CMN_CSRCS += up_etherstub.c
|
||||
@ -91,6 +95,10 @@ ifeq ($(CONFIG_ARMV7M_CMNVECTOR),y)
|
||||
CHIP_ASRCS += lpc17_vectors.S
|
||||
endif
|
||||
|
||||
ifeq ($(CONFIG_NUTTX_KERNEL),y)
|
||||
CHIP_CSRCS += lpc17_userspace.c lpc17_mpuinit.c
|
||||
endif
|
||||
|
||||
ifeq ($(CONFIG_LPC17_EMC),y)
|
||||
CHIP_CSRCS += lpc17_emc.c
|
||||
endif
|
||||
|
||||
@ -53,6 +53,7 @@
|
||||
#include "chip/lpc17_memorymap.h"
|
||||
#include "lpc17_emacram.h"
|
||||
#include "lpc17_ohciram.h"
|
||||
#include "lpc17_mpuinit.h"
|
||||
|
||||
/****************************************************************************
|
||||
* Private Definitions
|
||||
@ -195,11 +196,84 @@
|
||||
|
||||
void up_allocate_heap(FAR void **heap_start, size_t *heap_size)
|
||||
{
|
||||
#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP)
|
||||
/* Get the unaligned size of the user-space heap */
|
||||
|
||||
uintptr_t ubase = (uintptr_t)g_heapbase + CONFIG_MM_KERNEL_HEAPSIZE;
|
||||
size_t usize = CONFIG_DRAM_END - ubase;
|
||||
int log2;
|
||||
|
||||
DEBUGASSERT(ubase < (uintptr_t)CONFIG_DRAM_END);
|
||||
|
||||
/* Adjust that size to account for MPU alignment requirements.
|
||||
* NOTE that there is an implicit assumption that the CONFIG_DRAM_END
|
||||
* is aligned to the MPU requirement.
|
||||
*/
|
||||
|
||||
log2 = (int)mpu_log2regionsize(usize);
|
||||
DEBUGASSERT((CONFIG_DRAM_END & ((1 << log2) - 1)) == 0);
|
||||
|
||||
usize = (1 << log2);
|
||||
ubase = CONFIG_DRAM_END - usize
|
||||
|
||||
/* Return the user-space heap settings */
|
||||
|
||||
up_ledon(LED_HEAPALLOCATE);
|
||||
*heap_start = (FAR void*)ubase;
|
||||
*heap_size = usize;
|
||||
|
||||
/* Allow user-mode access to the user heap memory */
|
||||
|
||||
lpc17_mpu_uheap((uintptr_t)ubase, usize);
|
||||
#else
|
||||
|
||||
/* Return the heap settings */
|
||||
|
||||
up_ledon(LED_HEAPALLOCATE);
|
||||
*heap_start = (FAR void*)g_heapbase;
|
||||
*heap_size = CONFIG_DRAM_END - g_heapbase;
|
||||
*heap_size = CONFIG_DRAM_END - g_heapbase;
|
||||
#endif
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: up_allocate_kheap
|
||||
*
|
||||
* Description:
|
||||
* For the kernel build (CONFIG_NUTTX_KERNEL=y) with both kernel- and
|
||||
* user-space heaps (CONFIG_MM_KERNEL_HEAP=y), this function allocates
|
||||
* (and protects) the kernel-space heap.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP)
|
||||
void up_allocate_kheap(FAR void **heap_start, size_t *heap_size)
|
||||
{
|
||||
/* Get the unaligned size of the user-space heap */
|
||||
|
||||
uintptr_t ubase = (uintptr_t)g_heapbase + CONFIG_MM_KERNEL_HEAPSIZE;
|
||||
size_t usize = CONFIG_DRAM_END - ubase;
|
||||
int log2;
|
||||
|
||||
DEBUGASSERT(ubase < (uintptr_t)CONFIG_DRAM_END);
|
||||
|
||||
/* Adjust that size to account for MPU alignment requirements.
|
||||
* NOTE that there is an implicit assumption that the CONFIG_DRAM_END
|
||||
* is aligned to the MPU requirement.
|
||||
*/
|
||||
|
||||
log2 = (int)mpu_log2regionsize(usize);
|
||||
DEBUGASSERT((CONFIG_DRAM_END & ((1 << log2) - 1)) == 0);
|
||||
|
||||
usize = (1 << log2);
|
||||
ubase = CONFIG_DRAM_END - usize
|
||||
|
||||
/* Return the kernel heap settings */
|
||||
|
||||
*heap_start = (FAR void*)g_heapbase;
|
||||
*heap_size = ubase - (uintptr_t)g_heapbase;
|
||||
}
|
||||
#endif
|
||||
|
||||
/************************************************************************
|
||||
* Name: up_addregion
|
||||
*
|
||||
|
||||
124
arch/arm/src/lpc17xx/lpc17_mpuinit.c
Normal file
124
arch/arm/src/lpc17xx/lpc17_mpuinit.c
Normal file
@ -0,0 +1,124 @@
|
||||
/****************************************************************************
|
||||
* arch/arm/src/common/lpc17_mpuinit.c
|
||||
*
|
||||
* Copyright (C) 2011, 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 <assert.h>
|
||||
|
||||
#include <nuttx/userspace.h>
|
||||
|
||||
#include "mpu.h"
|
||||
#include "lp17_mpuinit.h"
|
||||
|
||||
#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_ARMV7M_MPU)
|
||||
|
||||
/****************************************************************************
|
||||
* Private Definitions
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef MAX
|
||||
# define MAX(a,b) a > b ? a : b
|
||||
#endif
|
||||
|
||||
#ifndef MIN
|
||||
# define MIN(a,b) a < b ? a : b
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Private Data
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Private Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: lpc17_mpuinitialize
|
||||
*
|
||||
* Description:
|
||||
* Configure the MPU to permit user-space access to only restricted SAM3U
|
||||
* resources.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
void lpc17_mpuinitialize(void)
|
||||
{
|
||||
uintptr_t datastart = MIN(USERSPACE->us_datastart, USERSPACE->us_bssstart);
|
||||
uintptr_t dataend = MAX(USERSPACE->us_dataend, USERSPACE->us_bssend);
|
||||
|
||||
DEBUGASSERT(USERSPACE->us_textend >= USERSPACE->us_textstart &&
|
||||
dataend >= datastart);
|
||||
|
||||
/* Show MPU information */
|
||||
|
||||
mpu_showtype();
|
||||
|
||||
/* Configure user flash and SRAM space */
|
||||
|
||||
mpu_userflash(USERSPACE->us_textstart,
|
||||
USERSPACE->us_textend - USERSPACE->us_textstart);
|
||||
|
||||
mpu_userintsram(datastart, dataend - datastart);
|
||||
|
||||
/* Then enable the MPU */
|
||||
|
||||
mpu_control(true, false, true);
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: lpc17_mpu_uheap
|
||||
*
|
||||
* Description:
|
||||
* Map the user-heap region.
|
||||
*
|
||||
* This logic may need an extension to handle external SDRAM).
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
void lpc17_mpu_uheap(uintptr_t start, size_t size)
|
||||
{
|
||||
mpu_userintsram(start, size);
|
||||
}
|
||||
|
||||
#endif /* CONFIG_NUTTX_KERNEL && CONFIG_ARMV7M_MPU */
|
||||
|
||||
90
arch/arm/src/lpc17xx/lpc17_mpuinit.h
Normal file
90
arch/arm/src/lpc17xx/lpc17_mpuinit.h
Normal file
@ -0,0 +1,90 @@
|
||||
/************************************************************************************
|
||||
* arch/arm/src/lpc17xx/lpc17_mpuinit.h
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
#ifndef __ARCH_ARM_SRC_LPC17XX_LPC17_MPUINIT_H
|
||||
#define __ARCH_ARM_SRC_LPC17XX_LPC17_MPUINIT_H
|
||||
|
||||
/************************************************************************************
|
||||
* Included Files
|
||||
************************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
/************************************************************************************
|
||||
* Pre-processor Definitions
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
||||
* Public Types
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
||||
* Public Data
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
||||
* Public Functions
|
||||
************************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: lpc17_mpuinitialize
|
||||
*
|
||||
* Description:
|
||||
* Configure the MPU to permit user-space access to only unrestricted MCU
|
||||
* resources.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#ifdef CONFIG_NUTTX_KERNEL
|
||||
void lpc17_mpuinitialize(void);
|
||||
#else
|
||||
# define lpc17_mpuinitialize()
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Name: lpc17_mpu_uheap
|
||||
*
|
||||
* Description:
|
||||
* Map the user heap region.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#ifdef CONFIG_NUTTX_KERNEL
|
||||
void lpc17_mpu_uheap(uintptr_t start, size_t size);
|
||||
#else
|
||||
# define lpc17_mpu_uheap(start,size)
|
||||
#endif
|
||||
|
||||
#endif /* __ARCH_ARM_SRC_LPC17XX_LPC17_MPUINIT_H */
|
||||
@ -2,7 +2,7 @@
|
||||
* arch/arm/src/lpc17xx/lpc17_start.c
|
||||
* arch/arm/src/chip/lpc17_start.c
|
||||
*
|
||||
* Copyright (C) 2010, 2012 Gregory Nutt. All rights reserved.
|
||||
* Copyright (C) 2010, 2012-2013 Gregory Nutt. All rights reserved.
|
||||
* Author: Gregory Nutt <gnutt@nuttx.org>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
@ -52,6 +52,7 @@
|
||||
|
||||
#include "lpc17_clockconfig.h"
|
||||
#include "lpc17_lowputc.h"
|
||||
#include "lpc17_userspace.h"
|
||||
|
||||
#ifdef CONFIG_ARCH_FPU
|
||||
# include "nvic.h"
|
||||
@ -230,10 +231,21 @@ void __start(void)
|
||||
#endif
|
||||
showprogress('D');
|
||||
|
||||
/* 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
|
||||
* segements.
|
||||
*/
|
||||
|
||||
#ifdef CONFIG_NUTTX_KERNEL
|
||||
lpc17_userspace();
|
||||
showprogress('E');
|
||||
#endif
|
||||
|
||||
/* Initialize onboard resources */
|
||||
|
||||
lpc17_boardinitialize();
|
||||
showprogress('E');
|
||||
showprogress('F');
|
||||
|
||||
/* Then start NuttX */
|
||||
|
||||
|
||||
119
arch/arm/src/lpc17xx/lpc17_userspace.c
Normal file
119
arch/arm/src/lpc17xx/lpc17_userspace.c
Normal file
@ -0,0 +1,119 @@
|
||||
/****************************************************************************
|
||||
* arch/arm/src/lpc17xx/lpc17_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 "lpc17_mpuinit.h"
|
||||
#include "lpc17_userspace.h"
|
||||
|
||||
#ifdef CONFIG_NUTTX_KERNEL
|
||||
|
||||
/****************************************************************************
|
||||
* Private Definitions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Private Data
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Private Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: lpc17_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 lpc17_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 */
|
||||
|
||||
lpc17_mpuinitialize();
|
||||
}
|
||||
|
||||
#endif /* CONFIG_NUTTX_KERNEL */
|
||||
|
||||
77
arch/arm/src/lpc17xx/lpc17_userspace.h
Normal file
77
arch/arm/src/lpc17xx/lpc17_userspace.h
Normal file
@ -0,0 +1,77 @@
|
||||
/************************************************************************************
|
||||
* arch/arm/src/lpc17xx/lpc17_qei.h
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
#ifndef __ARCH_ARM_SRC_LPC17XX_LPC17_USERSPACE_H
|
||||
#define __ARCH_ARM_SRC_LPC17XX_LPC17_USERSPACE_H
|
||||
|
||||
/************************************************************************************
|
||||
* Included Files
|
||||
************************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
#include "chip/lpc17_qei.h"
|
||||
|
||||
/************************************************************************************
|
||||
* Pre-processor Definitions
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
||||
* Public Types
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
||||
* Public Data
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
||||
* Public Functions
|
||||
************************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: lpc17_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.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#ifdef CONFIG_NUTTX_KERNEL
|
||||
void lpc17_userspace(void);
|
||||
#endif
|
||||
|
||||
#endif /* __ARCH_ARM_SRC_LPC17XX_LPC17_USERSPACE_H */
|
||||
@ -78,68 +78,6 @@
|
||||
# warning "CONFIG_DRAM_END is before end of SRAM0... not all of SRAM0 used"
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_MM_KERNEL_HEAPSIZE
|
||||
# if CONFIG_MM_KERNEL_HEAPSIZE < (1 << 5) /* Kernel heap size < 2**5 */
|
||||
# define KHEAP_SIZE (1 << 4) /* Use size 2**4 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 6) /* Kernel heap size < 2**6 */
|
||||
# define KHEAP_SIZE (1 << 5) /* Use size 2**5 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 7) /* Kernel heap size < 2**7 */
|
||||
# define KHEAP_SIZE (1 << 6) /* Use size 2**6 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 8) /* Kernel heap size < 2**8 */
|
||||
# define KHEAP_SIZE (1 << 7) /* Use size 2**7 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 9) /* Kernel heap size < 2**9 */
|
||||
# define KHEAP_SIZE (1 << 8) /* Use size 2**8 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 10) /* Kernel heap size < 2**10 */
|
||||
# define KHEAP_SIZE (1 << 9) /* Use size 2**9 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 11) /* Kernel heap size < 2**11 */
|
||||
# define KHEAP_SIZE (1 << 10) /* Use size 2**10 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 12) /* Kernel heap size < 2**12 */
|
||||
# define KHEAP_SIZE (1 << 11) /* Use size 2**11 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 13) /* Kernel heap size < 2**13 */
|
||||
# define KHEAP_SIZE (1 << 12) /* Use size 2**12 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 14) /* Kernel heap size < 2**14 */
|
||||
# define KHEAP_SIZE (1 << 13) /* Use size 2**13 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 15) /* Kernel heap size < 2**15 */
|
||||
# define KHEAP_SIZE (1 << 14) /* Use size 2**14 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 16) /* Kernel heap size < 2**16 */
|
||||
# define KHEAP_SIZE (1 << 15) /* Use size 2**15 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 17) /* Kernel heap size < 2**17 */
|
||||
# define KHEAP_SIZE (1 << 16) /* Use size 2**16 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 18) /* Kernel heap size < 2**18 */
|
||||
# define KHEAP_SIZE (1 << 17) /* Use size 2**17 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 19) /* Kernel heap size < 2**19 */
|
||||
# define KHEAP_SIZE (1 << 18) /* Use size 2**18 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 20) /* Kernel heap size < 2**20 */
|
||||
# define KHEAP_SIZE (1 << 19) /* Use size 2**19 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 21) /* Kernel heap size < 2**21 */
|
||||
# define KHEAP_SIZE (1 << 20) /* Use size 2**20 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 22) /* Kernel heap size < 2**22 */
|
||||
# define KHEAP_SIZE (1 << 21) /* Use size 2**21 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 23) /* Kernel heap size < 2**23 */
|
||||
# define KHEAP_SIZE (1 << 22) /* Use size 2**22 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 24) /* Kernel heap size < 2**24 */
|
||||
# define KHEAP_SIZE (1 << 23) /* Use size 2**23 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 25) /* Kernel heap size < 2**25 */
|
||||
# define KHEAP_SIZE (1 << 24) /* Use size 2**24 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 26) /* Kernel heap size < 2**26 */
|
||||
# define KHEAP_SIZE (1 << 25) /* Use size 2**25 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 27) /* Kernel heap size < 2**27 */
|
||||
# define KHEAP_SIZE (1 << 26) /* Use size 2**26 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 28) /* Kernel heap size < 2**28 */
|
||||
# define KHEAP_SIZE (1 << 27) /* Use size 2**27 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 29) /* Kernel heap size < 2**29 */
|
||||
# define KHEAP_SIZE (1 << 28) /* Use size 2**28 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 30) /* Kernel heap size < 2**30 */
|
||||
# define KHEAP_SIZE (1 << 29) /* Use size 2**29 */
|
||||
# elif CONFIG_MM_KERNEL_HEAPSIZE < (1 << 31) /* Kernel heap size < 2**31 */
|
||||
# define KHEAP_SIZE (1 << 30) /* Use size 2**30 */
|
||||
# else
|
||||
# define KHEAP_SIZE (1 << 31) /* Use size 2**31 */
|
||||
# endif
|
||||
|
||||
# define KHEAP_MASK (KHEAP_SIZE - 1)
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Private Data
|
||||
****************************************************************************/
|
||||
@ -170,35 +108,41 @@
|
||||
void up_allocate_heap(FAR void **heap_start, size_t *heap_size)
|
||||
{
|
||||
#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP)
|
||||
uintptr_t kbase = ((uintptr_t)g_heapbase + KHEAP_MASK) & ~KHEAP_MASK;
|
||||
uintptr_t ubase = kbase + KHEAP_SIZE;
|
||||
/* Get the unaligned size of the user-space heap */
|
||||
|
||||
uintptr_t ubase = (uintptr_t)g_heapbase + CONFIG_MM_KERNEL_HEAPSIZE;
|
||||
size_t usize = CONFIG_DRAM_END - ubase;
|
||||
int log2;
|
||||
|
||||
DEBUGASSERT(ubase < (uintptr_t)CONFIG_DRAM_END);
|
||||
|
||||
/* Return the heap settings */
|
||||
/* Adjust that size to account for MPU alignment requirements.
|
||||
* NOTE that there is an implicit assumption that the CONFIG_DRAM_END
|
||||
* is aligned to the MPU requirement.
|
||||
*/
|
||||
|
||||
log2 = (int)mpu_log2regionsize(usize);
|
||||
DEBUGASSERT((CONFIG_DRAM_END & ((1 << log2) - 1)) == 0);
|
||||
|
||||
usize = (1 << log2);
|
||||
ubase = CONFIG_DRAM_END - usize
|
||||
|
||||
/* Return the user-space heap settings */
|
||||
|
||||
up_ledon(LED_HEAPALLOCATE);
|
||||
*heap_start = (FAR void*)ubase;
|
||||
*heap_size = usize;
|
||||
|
||||
/* Allow access to the heap memory */
|
||||
/* Allow user-mode access to the user heap memory */
|
||||
|
||||
sam3u_mpu_uheap((uintptr_t)ubase, usize);
|
||||
#else
|
||||
|
||||
size_t size = CONFIG_DRAM_END - g_heapbase;
|
||||
|
||||
/* Return the heap settings */
|
||||
|
||||
up_ledon(LED_HEAPALLOCATE);
|
||||
*heap_start = (FAR void*)g_heapbase;
|
||||
*heap_size = size;
|
||||
|
||||
/* Allow user access to the user heap memory */
|
||||
|
||||
sam3u_mpu_uheap((uintptr_t)g_heapbase, size);
|
||||
|
||||
*heap_size = CONFIG_DRAM_END - g_heapbase;
|
||||
#endif
|
||||
}
|
||||
|
||||
@ -215,14 +159,29 @@ void up_allocate_heap(FAR void **heap_start, size_t *heap_size)
|
||||
#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP)
|
||||
void up_allocate_kheap(FAR void **heap_start, size_t *heap_size)
|
||||
{
|
||||
uintptr_t kbase = ((uintptr_t)g_heapbase + KHEAP_MASK) & ~KHEAP_MASK;
|
||||
/* Get the unaligned size of the user-space heap */
|
||||
|
||||
DEBUGASSERT((kbase + KHEAP_SIZE) < (uintptr_t)CONFIG_DRAM_END);
|
||||
uintptr_t ubase = (uintptr_t)g_heapbase + CONFIG_MM_KERNEL_HEAPSIZE;
|
||||
size_t usize = CONFIG_DRAM_END - ubase;
|
||||
int log2;
|
||||
|
||||
/* Return the heap settings */
|
||||
DEBUGASSERT(ubase < (uintptr_t)CONFIG_DRAM_END);
|
||||
|
||||
*heap_start = (FAR void*)kbase;
|
||||
*heap_size = KHEAP_SIZE;
|
||||
/* Adjust that size to account for MPU alignment requirements.
|
||||
* NOTE that there is an implicit assumption that the CONFIG_DRAM_END
|
||||
* is aligned to the MPU requirement.
|
||||
*/
|
||||
|
||||
log2 = (int)mpu_log2regionsize(usize);
|
||||
DEBUGASSERT((CONFIG_DRAM_END & ((1 << log2) - 1)) == 0);
|
||||
|
||||
usize = (1 << log2);
|
||||
ubase = CONFIG_DRAM_END - usize
|
||||
|
||||
/* Return the kernel heap settings */
|
||||
|
||||
*heap_start = (FAR void*)g_heapbase;
|
||||
*heap_size = ubase - (uintptr_t)g_heapbase;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
@ -453,7 +453,7 @@ void sam3u_lowsetup(void);
|
||||
* 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
|
||||
* segements.
|
||||
* segments.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
@ -465,7 +465,7 @@ void sam3u_userspace(void);
|
||||
* Name: sam3u_mpuinitialize
|
||||
*
|
||||
* Description:
|
||||
* Configure the MPU to permit user-space access to only restricted SAM3U
|
||||
* Configure the MPU to permit user-space access to only unrestricted SAM3U
|
||||
* resources.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
@ -45,7 +45,7 @@
|
||||
|
||||
#include "mpu.h"
|
||||
|
||||
#ifdef CONFIG_NUTTX_KERNEL
|
||||
#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_ARMV7M_MPU)
|
||||
|
||||
/****************************************************************************
|
||||
* Private Definitions
|
||||
@ -105,12 +105,12 @@ void sam3u_mpuinitialize(void)
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: sam3u_mpu_uheap and sam3u_mpu_uheap
|
||||
* Name: sam3u_mpu_uheap
|
||||
*
|
||||
* Description:
|
||||
* Map a user- or kernel-heap region.
|
||||
* Map the user-heap region.
|
||||
*
|
||||
* This logic may need an extension to handle external SRAM).
|
||||
* This logic may need an extension to handle external SDRAM).
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
@ -119,5 +119,5 @@ void sam3u_mpu_uheap(uintptr_t start, size_t size)
|
||||
mpu_userintsram(start, size);
|
||||
}
|
||||
|
||||
#endif /* CONFIG_NUTTX_KERNEL */
|
||||
#endif /* CONFIG_NUTTX_KERNEL && CONFIG_ARMV7M_MPU */
|
||||
|
||||
|
||||
@ -142,12 +142,13 @@ void __start(void)
|
||||
|
||||
#ifdef CONFIG_NUTTX_KERNEL
|
||||
sam3u_userspace();
|
||||
showprogress('E');
|
||||
#endif
|
||||
|
||||
/* Initialize onboard resources */
|
||||
|
||||
sam3u_boardinitialize();
|
||||
showprogress('E');
|
||||
showprogress('F');
|
||||
|
||||
/* Then start NuttX */
|
||||
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
/****************************************************************************
|
||||
* arch/arm/src/common/sam3u_userspace.c
|
||||
* arch/arm/src/sam3u/sam3u_userspace.c
|
||||
*
|
||||
* Copyright (C) 2011, 2013 Gregory Nutt. All rights reserved.
|
||||
* Author: Gregory Nutt <gnutt@nuttx.org>
|
||||
@ -71,7 +71,7 @@
|
||||
* 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
|
||||
* segements.
|
||||
* segments.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
|
||||
@ -39,6 +39,7 @@
|
||||
************************************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
#include <arch/irq.h>
|
||||
|
||||
/************************************************************************************************
|
||||
@ -240,13 +241,18 @@ sam3u_common:
|
||||
*/
|
||||
|
||||
adds r2, r14, #3 /* If R14=0xfffffffd, then r2 == 0 */
|
||||
ite ne /* Next two instructions are condition */
|
||||
ite ne /* Next two instructions are conditional */
|
||||
mrsne r1, msp /* R1=The main stack pointer */
|
||||
mrseq r1, psp /* R1=The process stack pointer */
|
||||
#else
|
||||
mrs r1, msp /* R1=The main stack pointer */
|
||||
#endif
|
||||
|
||||
/* r1 holds the value of the stack pointer AFTER the excption handling logic
|
||||
* pushed the various registers onto the stack. Get r2 = the value of the
|
||||
* stack pointer BEFORE the interrupt modified it.
|
||||
*/
|
||||
|
||||
mov r2, r1 /* R2=Copy of the main/process stack pointer */
|
||||
add r2, #HW_XCPT_SIZE /* R2=MSP/PSP before the interrupt was taken */
|
||||
#ifdef CONFIG_ARMV7M_USEBASEPRI
|
||||
@ -254,6 +260,22 @@ sam3u_common:
|
||||
#else
|
||||
mrs r3, primask /* R3=Current PRIMASK setting */
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_ARCH_FPU
|
||||
/* Skip over the block of memory reserved for floating pointer register save.
|
||||
* Lazy FPU register saving is used. FPU registers will be saved in this
|
||||
* block only if a context switch occurs (this means, of course, that the FPU
|
||||
* cannot be used in interrupt processing).
|
||||
*/
|
||||
|
||||
sub r1, #(4*SW_FPU_REGS)
|
||||
#endif
|
||||
|
||||
/* Save the the remaining registers on the stack after the registers pushed
|
||||
* by the exception handling logic. r2=SP and r3=primask or basepri, r4-r11,
|
||||
* r14=register values.
|
||||
*/
|
||||
|
||||
#ifdef CONFIG_NUTTX_KERNEL
|
||||
stmdb r1!, {r2-r11,r14} /* Save the remaining registers plus the SP value */
|
||||
#else
|
||||
@ -290,17 +312,36 @@ sam3u_common:
|
||||
cmp r0, r1 /* Context switch? */
|
||||
beq 1f /* Branch if no context switch */
|
||||
|
||||
/* We are returning with a pending context switch.
|
||||
*
|
||||
* If the FPU is enabled, then we will need to restore FPU registers.
|
||||
* This is not done in normal interrupt save/restore because the cost
|
||||
* is prohibitive. This is only done when switching contexts. A
|
||||
* consequence of this is that floating point operations may not be
|
||||
* performed in interrupt handling logic.
|
||||
*
|
||||
* Here:
|
||||
* r0 = Address of the register save area
|
||||
|
||||
* NOTE: It is a requirement that up_restorefpu() preserve the value of
|
||||
* r0!
|
||||
*/
|
||||
|
||||
#ifdef CONFIG_ARCH_FPU
|
||||
bl up_restorefpu /* Restore the FPU registers */
|
||||
#endif
|
||||
|
||||
/* We are returning with a pending context switch. This case is different
|
||||
* because in this case, the register save structure does not lie on the
|
||||
* stack but, rather, are within a TCB structure. We'll have to copy some
|
||||
* values to the stack.
|
||||
*/
|
||||
|
||||
add r1, r0, #SW_XCPT_SIZE /* R1=Address of HW save area in reg array */
|
||||
add r1, r0, #SW_XCPT_SIZE /* R1=Address of HW save area in reg array */
|
||||
ldmia r1, {r4-r11} /* Fetch eight registers in HW save area */
|
||||
ldr r1, [r0, #(4*REG_SP)] /* R1=Value of SP before interrupt */
|
||||
ldr r1, [r0, #(4*REG_SP)] /* R1=Value of SP before interrupt */
|
||||
stmdb r1!, {r4-r11} /* Store eight registers in HW save area */
|
||||
#ifdef CONFIG_NUTTX_KERNEL
|
||||
#ifdef CONFIG_NUTTX_KERNEL
|
||||
ldmia r0, {r2-r11,r14} /* Recover R4-R11, r14 + 2 temp values */
|
||||
#else
|
||||
ldmia r0, {r2-r11} /* Recover R4-R11 + 2 temp values */
|
||||
@ -309,13 +350,33 @@ sam3u_common:
|
||||
|
||||
/* We are returning with no context switch. We simply need to "unwind"
|
||||
* the same stack frame that we created
|
||||
*
|
||||
* Here:
|
||||
* r1 = Address of the return stack (same as r0)
|
||||
*/
|
||||
1:
|
||||
#ifdef CONFIG_NUTTX_KERNEL
|
||||
#ifdef CONFIG_NUTTX_KERNEL
|
||||
ldmia r1!, {r2-r11,r14} /* Recover R4-R11, r14 + 2 temp values */
|
||||
#else
|
||||
ldmia r1!, {r2-r11} /* Recover R4-R11 + 2 temp values */
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_ARCH_FPU
|
||||
/* Skip over the block of memory reserved for floating pointer register
|
||||
* save. Then R1 is the address of the HW save area
|
||||
*/
|
||||
|
||||
add r1, #(4*SW_FPU_REGS)
|
||||
#endif
|
||||
|
||||
/* Set up to return from the exception
|
||||
*
|
||||
* Here:
|
||||
* r1 = Address on the target thread's stack position at the start of
|
||||
* the registers saved by hardware
|
||||
* r3 = primask or basepri
|
||||
* r4-r11 = restored register values
|
||||
*/
|
||||
2:
|
||||
#ifdef CONFIG_NUTTX_KERNEL
|
||||
/* The EXC_RETURN value will be 0xfffffff9 (privileged thread) or 0xfffffff1
|
||||
|
||||
Loading…
Reference in New Issue
Block a user