1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
/****************************************************************************
* arch/arm/include/arch.h
*
* Copyright (C) 2007-2009, 2014 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.
*
****************************************************************************/
/* This file should never be included directed 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 Definitions
****************************************************************************/
#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 = (FAR 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 */
/****************************************************************************
* 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 */
FAR uintptr_t *text[ARCH_TEXT_NSECTS];
FAR uintptr_t *data[ARCH_DATA_NSECTS];
#ifdef CONFIG_BUILD_KERNEL
FAR uintptr_t *heap[ARCH_HEAP_NSECTS];
#ifdef CONFIG_MM_SHM
FAR 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
{
FAR uint32_t text[ARCH_TEXT_NSECTS];
FAR uint32_t data[ARCH_DATA_NSECTS];
#ifdef CONFIG_BUILD_KERNEL
FAR uint32_t heap[ARCH_HEAP_NSECTS];
#ifdef CONFIG_MM_SHM
FAR uint32_t shm[ARCH_SHM_NSECTS];
#endif
#endif
};
typedef struct save_addrenv_s save_addrenv_t;
#endif
/****************************************************************************
* Public Variables
****************************************************************************/
/****************************************************************************
* 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 */
|
