1/*
2 * This file is part of the MicroPython project, http://micropython.org/
3 *
4 * The MIT License (MIT)
5 *
6 * Copyright (c) 2013, 2014 Damien P. George
7 * Copyright (c) 2015 Paul Sokolovsky
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to deal
11 * in the Software without restriction, including without limitation the rights
12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 * copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 * THE SOFTWARE.
26 */
27
28#include <stdio.h>
29#include <stdint.h>
30
31#include "py/runtime.h"
32#include "py/obj.h"
33
34#include "extmod/machine_mem.h"
35#include "extmod/machine_pinbase.h"
36#include "extmod/machine_signal.h"
37#include "extmod/machine_pulse.h"
38
39#if MICROPY_PLAT_DEV_MEM
40#include <errno.h>
41#include <fcntl.h>
42#include <sys/mman.h>
43#define MICROPY_PAGE_SIZE 4096
44#define MICROPY_PAGE_MASK (MICROPY_PAGE_SIZE - 1)
45#endif
46
47#if MICROPY_PY_MACHINE
48
49uintptr_t mod_machine_mem_get_addr(mp_obj_t addr_o, uint align) {
50 uintptr_t addr = mp_obj_get_int_truncated(addr_o);
51 if ((addr & (align - 1)) != 0) {
52 mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("address %08x is not aligned to %d bytes"), addr, align);
53 }
54 #if MICROPY_PLAT_DEV_MEM
55 {
56 // Not thread-safe
57 static int fd;
58 static uintptr_t last_base = (uintptr_t)-1;
59 static uintptr_t map_page;
60 if (!fd) {
61 int _fd = open("/dev/mem", O_RDWR | O_SYNC);
62 if (_fd == -1) {
63 mp_raise_OSError(errno);
64 }
65 fd = _fd;
66 }
67
68 uintptr_t cur_base = addr & ~MICROPY_PAGE_MASK;
69 if (cur_base != last_base) {
70 map_page = (uintptr_t)mmap(NULL, MICROPY_PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, cur_base);
71 last_base = cur_base;
72 }
73 addr = map_page + (addr & MICROPY_PAGE_MASK);
74 }
75 #endif
76
77 return addr;
78}
79
80#ifdef MICROPY_UNIX_MACHINE_IDLE
81STATIC mp_obj_t machine_idle(void) {
82 MICROPY_UNIX_MACHINE_IDLE
83 return mp_const_none;
84}
85MP_DEFINE_CONST_FUN_OBJ_0(machine_idle_obj, machine_idle);
86#endif
87
88STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
89 { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_umachine) },
90
91 { MP_ROM_QSTR(MP_QSTR_mem8), MP_ROM_PTR(&machine_mem8_obj) },
92 { MP_ROM_QSTR(MP_QSTR_mem16), MP_ROM_PTR(&machine_mem16_obj) },
93 { MP_ROM_QSTR(MP_QSTR_mem32), MP_ROM_PTR(&machine_mem32_obj) },
94
95 #ifdef MICROPY_UNIX_MACHINE_IDLE
96 { MP_ROM_QSTR(MP_QSTR_idle), MP_ROM_PTR(&machine_idle_obj) },
97 #endif
98
99 { MP_ROM_QSTR(MP_QSTR_PinBase), MP_ROM_PTR(&machine_pinbase_type) },
100 { MP_ROM_QSTR(MP_QSTR_Signal), MP_ROM_PTR(&machine_signal_type) },
101 #if MICROPY_PY_MACHINE_PULSE
102 { MP_ROM_QSTR(MP_QSTR_time_pulse_us), MP_ROM_PTR(&machine_time_pulse_us_obj) },
103 #endif
104};
105
106STATIC MP_DEFINE_CONST_DICT(machine_module_globals, machine_module_globals_table);
107
108const mp_obj_module_t mp_module_machine = {
109 .base = { &mp_type_module },
110 .globals = (mp_obj_dict_t *)&machine_module_globals,
111};
112
113#endif // MICROPY_PY_MACHINE
114