114 lines
4.0 KiB
C
114 lines
4.0 KiB
C
/****************************************************************************
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* boards/arm/sam34/sam3u-ek/kernel/sam_userspace.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <stdlib.h>
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#include <nuttx/userspace.h>
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#include <nuttx/wqueue.h>
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#include <nuttx/mm/mm.h>
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#if defined(CONFIG_BUILD_PROTECTED) && !defined(__KERNEL__)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#ifndef CONFIG_NUTTX_USERSPACE
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# error "CONFIG_NUTTX_USERSPACE not defined"
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#endif
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#if CONFIG_NUTTX_USERSPACE != 0x00090000
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# error "CONFIG_NUTTX_USERSPACE must be 0x00090000 to match user-space.ld"
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#endif
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/* These 'addresses' of these values are setup by the linker script.
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* They are not actual uint32_t storage locations!
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* They are only used meaningfully in the following way:
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*
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* - The linker script defines, for example, the symbol_sdata.
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* - The declareion extern uint32_t _sdata; makes C happy. C will believe
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* that the value _sdata is the address of a uint32_t variable _data (it
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* is not!).
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* - We can recoved the linker value then by simply taking the address of
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* of _data. like: uint32_t *pdata = &_sdata;
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*/
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extern uint32_t _stext; /* Start of .text */
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extern uint32_t _etext; /* End_1 of .text + .rodata */
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extern const uint32_t _eronly; /* End+1 of read only section (.text + .rodata) */
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extern uint32_t _sdata; /* Start of .data */
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extern uint32_t _edata; /* End+1 of .data */
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extern uint32_t _sbss; /* Start of .bss */
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extern uint32_t _ebss; /* End+1 of .bss */
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/* This is the user space entry point */
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int CONFIG_INIT_ENTRYPOINT(int argc, char *argv[]);
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const struct userspace_s userspace locate_data(".userspace") =
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{
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/* General memory map */
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.us_entrypoint = (main_t)CONFIG_INIT_ENTRYPOINT,
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.us_textstart = (uintptr_t)&_stext,
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.us_textend = (uintptr_t)&_etext,
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.us_datasource = (uintptr_t)&_eronly,
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.us_datastart = (uintptr_t)&_sdata,
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.us_dataend = (uintptr_t)&_edata,
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.us_bssstart = (uintptr_t)&_sbss,
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.us_bssend = (uintptr_t)&_ebss,
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/* Memory manager heap structure */
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.us_heap = &g_mmheap,
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/* Task/thread startup routines */
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.task_startup = nxtask_startup,
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/* Signal handler trampoline */
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.signal_handler = up_signal_handler,
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/* User-space work queue support (declared in include/nuttx/wqueue.h) */
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#ifdef CONFIG_LIBC_USRWORK
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.work_usrstart = work_usrstart,
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#endif
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};
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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#endif /* CONFIG_BUILD_PROTECTED && !__KERNEL__ */
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