203 lines
6.1 KiB
C
203 lines
6.1 KiB
C
/****************************************************************************
|
|
* arch/arm/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_ARM_INCLUDE_ARCH_H
|
|
#define __ARCH_ARM_INCLUDE_ARCH_H
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#ifndef __ASSEMBLY__
|
|
# include <stdint.h>
|
|
# include <nuttx/pgalloc.h>
|
|
# include <nuttx/addrenv.h>
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Prototypes
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_PIC
|
|
|
|
/* This identifies the register the is used by the processor as the PIC base
|
|
* register. It is usually r9 or r10
|
|
*/
|
|
|
|
#define PIC_REG r10
|
|
#define PIC_REG_STRING "r10"
|
|
|
|
/* Macros to get and set the PIC base register. picbase is assumed to be
|
|
* of type (void*) and that it will fit into a uint32_t. These must be
|
|
* inline so that they will be compatible with the ABIs rules for
|
|
* preserving the PIC register
|
|
*/
|
|
|
|
#define up_getpicbase(ppicbase) \
|
|
do { \
|
|
uint32_t picbase; \
|
|
__asm__ \
|
|
( \
|
|
"\tmov %0, " PIC_REG_STRING "\n\t" \
|
|
: "=r"(picbase) \
|
|
); \
|
|
*ppicbase = (void *)picbase; \
|
|
} while (0)
|
|
|
|
#define up_setpicbase(picbase) \
|
|
do { \
|
|
uint32_t _picbase = (uint32_t)picbase; \
|
|
__asm__ \
|
|
( \
|
|
"\tmov " PIC_REG_STRING ", %0\n\t" \
|
|
: : "r"(_picbase) : PIC_REG_STRING \
|
|
); \
|
|
} while (0)
|
|
|
|
#endif /* CONFIG_PIC */
|
|
|
|
#ifdef CONFIG_ARCH_ADDRENV
|
|
#if CONFIG_MM_PGSIZE != 4096
|
|
# error Only pages sizes of 4096 are currently supported (CONFIG_ARCH_ADDRENV)
|
|
#endif
|
|
|
|
/* Convert 4KiB pages to 1MiB sections */
|
|
|
|
# define __PG2SECT_SHIFT (20 - MM_PGSHIFT)
|
|
# define __PG2SECT_MASK ((1 << __PG2SECT_SHIFT) - 1)
|
|
|
|
# define ARCH_PG2SECT(p) (((p) + __PG2SECT_MASK) >> __PG2SECT_SHIFT)
|
|
# define ARCH_SECT2PG(s) ((s) << __PG2SECT_SHIFT)
|
|
|
|
# define ARCH_TEXT_NSECTS ARCH_PG2SECT(CONFIG_ARCH_TEXT_NPAGES)
|
|
# define ARCH_DATA_NSECTS ARCH_PG2SECT(CONFIG_ARCH_DATA_NPAGES)
|
|
# define ARCH_HEAP_NSECTS ARCH_PG2SECT(CONFIG_ARCH_HEAP_NPAGES)
|
|
|
|
# ifdef CONFIG_MM_SHM
|
|
# define ARCH_SHM_NSECTS ARCH_PG2SECT(ARCH_SHM_MAXPAGES)
|
|
# endif
|
|
|
|
# ifdef CONFIG_ARCH_STACK_DYNAMIC
|
|
# define ARCH_STACK_NSECTS ARCH_PG2SECT(CONFIG_ARCH_STACK_NPAGES)
|
|
# endif
|
|
#endif /* CONFIG_ARCH_ADDRENV */
|
|
|
|
/* Redefine the linker symbols as armlink style */
|
|
|
|
#ifdef CONFIG_ARM_TOOLCHAIN_ARMCLANG
|
|
# define _sinit Image$$init_section$$Base
|
|
# define _einit Image$$init_section$$Limit
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Inline functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Types
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_ARCH_ADDRENV
|
|
/* The task group resources are retained in a single structure, task_group_s
|
|
* that is defined in the header file nuttx/include/nuttx/sched.h. The type
|
|
* group_addrenv_t must be defined by platform specific logic in
|
|
* nuttx/arch/<architecture>/include/arch.h.
|
|
*
|
|
* These tables would hold the physical address of the level 2 page tables.
|
|
* All would be initially NULL and would not be backed up with physical
|
|
* memory until mappings in the level 2 page table are required.
|
|
*/
|
|
|
|
struct group_addrenv_s
|
|
{
|
|
/* Level 1 page table entries for each group section */
|
|
|
|
uintptr_t *text[ARCH_TEXT_NSECTS];
|
|
uintptr_t *data[ARCH_DATA_NSECTS];
|
|
#ifdef CONFIG_BUILD_KERNEL
|
|
uintptr_t *heap[ARCH_HEAP_NSECTS];
|
|
#ifdef CONFIG_MM_SHM
|
|
uintptr_t *shm[ARCH_SHM_NSECTS];
|
|
#endif
|
|
|
|
/* Initial heap allocation (in bytes). This exists only provide an
|
|
* indirect path for passing the size of the initial heap to the heap
|
|
* initialization logic. These operations are separated in time and
|
|
* architecture. REVISIT: I would like a better way to do this.
|
|
*/
|
|
|
|
size_t heapsize;
|
|
#endif
|
|
};
|
|
|
|
typedef struct group_addrenv_s group_addrenv_t;
|
|
|
|
/* This type is used when the OS needs to temporarily instantiate a
|
|
* different address environment. Used in the implementation of
|
|
*
|
|
* int up_addrenv_select(group_addrenv_t addrenv, save_addrenv_t *oldenv);
|
|
* int up_addrenv_restore(save_addrenv_t oldenv);
|
|
*
|
|
* In this case, the saved valued in the L1 page table are returned
|
|
*/
|
|
|
|
struct save_addrenv_s
|
|
{
|
|
uint32_t text[ARCH_TEXT_NSECTS];
|
|
uint32_t data[ARCH_DATA_NSECTS];
|
|
#ifdef CONFIG_BUILD_KERNEL
|
|
uint32_t heap[ARCH_HEAP_NSECTS];
|
|
#ifdef CONFIG_MM_SHM
|
|
uint32_t shm[ARCH_SHM_NSECTS];
|
|
#endif
|
|
#endif
|
|
};
|
|
|
|
typedef struct save_addrenv_s save_addrenv_t;
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* 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_ARM_INCLUDE_ARCH_H */
|