127 lines
4.0 KiB
C
127 lines
4.0 KiB
C
/****************************************************************************
|
|
* arch/arm64/include/arch.h
|
|
*
|
|
* 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/* This file should never be included directly but, rather,
|
|
* only indirectly through nuttx/arch.h
|
|
*/
|
|
|
|
#ifndef __ARCH_ARM64_INCLUDE_ARCH_H
|
|
#define __ARCH_ARM64_INCLUDE_ARCH_H
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
# include <stdint.h>
|
|
# include <stddef.h>
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Prototypes
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_ARCH_ADDRENV
|
|
#if CONFIG_MM_PGSIZE != 4096
|
|
# error Only pages sizes of 4096 are currently supported (CONFIG_ARCH_ADDRENV)
|
|
#endif
|
|
|
|
/* All implementations have 4 levels of page tables */
|
|
|
|
#define ARCH_PGT_MAX_LEVELS (4)
|
|
#define ARCH_SPGTS (ARCH_PGT_MAX_LEVELS - 1)
|
|
|
|
#endif /* CONFIG_ARCH_ADDRENV */
|
|
|
|
/****************************************************************************
|
|
* Inline functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Types
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_ARCH_ADDRENV
|
|
#ifndef __ASSEMBLY__
|
|
|
|
/* A task group must have its L1 table in memory always, and the rest can
|
|
* be dynamically committed to memory (and even swapped).
|
|
*
|
|
* In this implementation level tables except the final level N are always
|
|
* kept in static memory, while the level N tables are always dynamically
|
|
* allocated. There is one static page per level in `spgtables[]`.
|
|
*
|
|
* For the VMSAv8-64 address translation system this means that:
|
|
* - A task can not have more than 1GB of memory allocated. This should be
|
|
* plenty enough...
|
|
* - The minimum amount of memory needed for page tables per task is 12K,
|
|
* which gives access to 2MB of memory. This is plenty for many tasks.
|
|
*/
|
|
|
|
struct arch_addrenv_s
|
|
{
|
|
/* Physical addresses of the static page tables (levels N-1) here, these
|
|
* are allocated when a task is created.
|
|
*/
|
|
|
|
uintptr_t spgtables[ARCH_SPGTS];
|
|
|
|
/* The text, data, heap bases and heap size here */
|
|
|
|
uintptr_t textvbase;
|
|
uintptr_t datavbase;
|
|
uintptr_t heapvbase;
|
|
size_t heapsize;
|
|
|
|
/* The page directory root (ttbr0) value */
|
|
|
|
uintptr_t ttbr0;
|
|
};
|
|
|
|
typedef struct arch_addrenv_s arch_addrenv_t;
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* CONFIG_ARCH_ADDRENV */
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Function Prototypes
|
|
****************************************************************************/
|
|
|
|
#ifdef __cplusplus
|
|
#define EXTERN extern "C"
|
|
extern "C"
|
|
{
|
|
#else
|
|
#define EXTERN extern
|
|
#endif
|
|
|
|
#undef EXTERN
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __ARCH_ARM64_INCLUDE_ARCH_H */
|