175 lines
6.0 KiB
C
175 lines
6.0 KiB
C
/****************************************************************************
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* arch/or1k/include/arch.h
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*
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* Copyright (C) 2018 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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/* This file should never be included directly but, rather,
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* only indirectly through nuttx/arch.h
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*/
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#ifndef __ARCH_OR1K_INCLUDE_ARCH_H
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#define __ARCH_OR1K_INCLUDE_ARCH_H
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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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#ifndef __ASSEMBLY__
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# include <stdint.h>
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# include <nuttx/pgalloc.h>
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# include <nuttx/addrenv.h>
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#endif
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define IDLE_STACK ((uint32_t)&_ebss+CONFIG_IDLETHREAD_STACKSIZE-4)
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#ifdef CONFIG_ARCH_ADDRENV
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#if CONFIG_MM_PGSIZE != 4096
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# error Only pages sizes of 4096 are currently supported (CONFIG_ARCH_ADDRENV)
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#endif
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/* Convert 4KiB pages to 1MiB sections */
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# define __PG2SECT_SHIFT (20 - MM_PGSHIFT)
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# define __PG2SECT_MASK ((1 << __PG2SECT_SHIFT) - 1)
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# define ARCH_PG2SECT(p) (((p) + __PG2SECT_MASK) >> __PG2SECT_SHIFT)
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# define ARCH_SECT2PG(s) ((s) << __PG2SECT_SHIFT)
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# define ARCH_TEXT_NSECTS ARCH_PG2SECT(CONFIG_ARCH_TEXT_NPAGES)
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# define ARCH_DATA_NSECTS ARCH_PG2SECT(CONFIG_ARCH_DATA_NPAGES)
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# define ARCH_HEAP_NSECTS ARCH_PG2SECT(CONFIG_ARCH_HEAP_NPAGES)
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# ifdef CONFIG_MM_SHM
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# define ARCH_SHM_NSECTS ARCH_PG2SECT(ARCH_SHM_MAXPAGES)
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# endif
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# ifdef CONFIG_ARCH_STACK_DYNAMIC
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# define ARCH_STACK_NSECTS ARCH_PG2SECT(CONFIG_ARCH_STACK_NPAGES)
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# endif
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#endif /* CONFIG_ARCH_ADDRENV */
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/****************************************************************************
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* Inline functions
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****************************************************************************/
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/****************************************************************************
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* Public Types
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****************************************************************************/
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#ifdef CONFIG_ARCH_ADDRENV
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/* The task group resources are retained in a single structure, task_group_s
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* that is defined in the header file nuttx/include/nuttx/sched.h. The type
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* group_addrenv_t must be defined by platform specific logic in
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* nuttx/arch/<architecture>/include/arch.h.
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*
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* These tables would hold the physical address of the level 2 page tables.
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* All would be initially NULL and would not be backed up with physical memory
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* until mappings in the level 2 page table are required.
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*/
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struct group_addrenv_s
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{
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/* Level 1 page table entries for each group section */
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FAR uintptr_t *text[ARCH_TEXT_NSECTS];
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FAR uintptr_t *data[ARCH_DATA_NSECTS];
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#ifdef CONFIG_BUILD_KERNEL
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FAR uintptr_t *heap[ARCH_HEAP_NSECTS];
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#ifdef CONFIG_MM_SHM
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FAR uintptr_t *shm[ARCH_SHM_NSECTS];
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#endif
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/* Initial heap allocation (in bytes). This exists only provide an
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* indirect path for passing the size of the initial heap to the heap
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* initialization logic. These operations are separated in time and
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* architecture. REVISIT: I would like a better way to do this.
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*/
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size_t heapsize;
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#endif
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};
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typedef struct group_addrenv_s group_addrenv_t;
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/* This type is used when the OS needs to temporarily instantiate a
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* different address environment. Used in the implementation of
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*
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* int up_addrenv_select(group_addrenv_t addrenv, save_addrenv_t *oldenv);
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* int up_addrenv_restore(save_addrenv_t oldenv);
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*
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* In this case, the saved valued in the L1 page table are returned
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*/
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struct save_addrenv_s
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{
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FAR uint32_t text[ARCH_TEXT_NSECTS];
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FAR uint32_t data[ARCH_DATA_NSECTS];
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#ifdef CONFIG_BUILD_KERNEL
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FAR uint32_t heap[ARCH_HEAP_NSECTS];
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#ifdef CONFIG_MM_SHM
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FAR uint32_t shm[ARCH_SHM_NSECTS];
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#endif
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#endif
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};
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typedef struct save_addrenv_s save_addrenv_t;
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#endif
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ARCH_OR1K_INCLUDE_ARCH_H */
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