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ef016f83 MF |
1 | /* Blackfin General Purpose Timers (GPtimer) model |
2 | ||
3666a048 | 3 | Copyright (C) 2010-2021 Free Software Foundation, Inc. |
ef016f83 MF |
4 | Contributed by Analog Devices, Inc. |
5 | ||
6 | This file is part of simulators. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
20 | ||
6df01ab8 MF |
21 | /* This must come before any other includes. */ |
22 | #include "defs.h" | |
ef016f83 MF |
23 | |
24 | #include "sim-main.h" | |
25 | #include "devices.h" | |
26 | #include "dv-bfin_gptimer.h" | |
27 | ||
28 | /* XXX: This is merely a stub. */ | |
29 | ||
30 | struct bfin_gptimer | |
31 | { | |
32 | /* This top portion matches common dv_bfin struct. */ | |
33 | bu32 base; | |
34 | struct hw *dma_master; | |
35 | bool acked; | |
36 | ||
37 | struct hw_event *handler; | |
38 | char saved_byte; | |
39 | int saved_count; | |
40 | ||
41 | /* Order after here is important -- matches hardware MMR layout. */ | |
42 | bu16 BFIN_MMR_16(config); | |
43 | bu32 counter, period, width; | |
44 | }; | |
45 | #define mmr_base() offsetof(struct bfin_gptimer, config) | |
46 | #define mmr_offset(mmr) (offsetof(struct bfin_gptimer, mmr) - mmr_base()) | |
47 | ||
990d19fd MF |
48 | static const char * const mmr_names[] = |
49 | { | |
ef016f83 MF |
50 | "TIMER_CONFIG", "TIMER_COUNTER", "TIMER_PERIOD", "TIMER_WIDTH", |
51 | }; | |
52 | #define mmr_name(off) mmr_names[(off) / 4] | |
53 | ||
54 | static unsigned | |
55 | bfin_gptimer_io_write_buffer (struct hw *me, const void *source, int space, | |
56 | address_word addr, unsigned nr_bytes) | |
57 | { | |
58 | struct bfin_gptimer *gptimer = hw_data (me); | |
59 | bu32 mmr_off; | |
60 | bu32 value; | |
61 | bu16 *value16p; | |
62 | bu32 *value32p; | |
63 | void *valuep; | |
64 | ||
466b619e MF |
65 | /* Invalid access mode is higher priority than missing register. */ |
66 | if (!dv_bfin_mmr_require_16_32 (me, addr, nr_bytes, true)) | |
67 | return 0; | |
68 | ||
ef016f83 MF |
69 | if (nr_bytes == 4) |
70 | value = dv_load_4 (source); | |
71 | else | |
72 | value = dv_load_2 (source); | |
73 | ||
74 | mmr_off = addr - gptimer->base; | |
75 | valuep = (void *)((unsigned long)gptimer + mmr_base() + mmr_off); | |
76 | value16p = valuep; | |
77 | value32p = valuep; | |
78 | ||
79 | HW_TRACE_WRITE (); | |
80 | ||
81 | switch (mmr_off) | |
82 | { | |
83 | case mmr_offset(config): | |
466b619e MF |
84 | if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, true)) |
85 | return 0; | |
ef016f83 MF |
86 | *value16p = value; |
87 | break; | |
88 | case mmr_offset(counter): | |
89 | case mmr_offset(period): | |
90 | case mmr_offset(width): | |
466b619e MF |
91 | if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, true)) |
92 | return 0; | |
ef016f83 MF |
93 | *value32p = value; |
94 | break; | |
95 | default: | |
96 | dv_bfin_mmr_invalid (me, addr, nr_bytes, true); | |
466b619e | 97 | return 0; |
ef016f83 MF |
98 | } |
99 | ||
100 | return nr_bytes; | |
101 | } | |
102 | ||
103 | static unsigned | |
104 | bfin_gptimer_io_read_buffer (struct hw *me, void *dest, int space, | |
105 | address_word addr, unsigned nr_bytes) | |
106 | { | |
107 | struct bfin_gptimer *gptimer = hw_data (me); | |
108 | bu32 mmr_off; | |
109 | bu16 *value16p; | |
110 | bu32 *value32p; | |
111 | void *valuep; | |
112 | ||
466b619e MF |
113 | /* Invalid access mode is higher priority than missing register. */ |
114 | if (!dv_bfin_mmr_require_16_32 (me, addr, nr_bytes, false)) | |
115 | return 0; | |
116 | ||
ef016f83 MF |
117 | mmr_off = addr - gptimer->base; |
118 | valuep = (void *)((unsigned long)gptimer + mmr_base() + mmr_off); | |
119 | value16p = valuep; | |
120 | value32p = valuep; | |
121 | ||
122 | HW_TRACE_READ (); | |
123 | ||
124 | switch (mmr_off) | |
125 | { | |
126 | case mmr_offset(config): | |
466b619e MF |
127 | if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, false)) |
128 | return 0; | |
ef016f83 MF |
129 | dv_store_2 (dest, *value16p); |
130 | break; | |
131 | case mmr_offset(counter): | |
132 | case mmr_offset(period): | |
133 | case mmr_offset(width): | |
466b619e MF |
134 | if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, false)) |
135 | return 0; | |
ef016f83 MF |
136 | dv_store_4 (dest, *value32p); |
137 | break; | |
138 | default: | |
139 | dv_bfin_mmr_invalid (me, addr, nr_bytes, false); | |
466b619e | 140 | return 0; |
ef016f83 MF |
141 | } |
142 | ||
143 | return nr_bytes; | |
144 | } | |
145 | ||
990d19fd MF |
146 | static const struct hw_port_descriptor bfin_gptimer_ports[] = |
147 | { | |
ef016f83 MF |
148 | { "stat", 0, 0, output_port, }, |
149 | { NULL, 0, 0, 0, }, | |
150 | }; | |
151 | ||
152 | static void | |
153 | attach_bfin_gptimer_regs (struct hw *me, struct bfin_gptimer *gptimer) | |
154 | { | |
155 | address_word attach_address; | |
156 | int attach_space; | |
157 | unsigned attach_size; | |
158 | reg_property_spec reg; | |
159 | ||
160 | if (hw_find_property (me, "reg") == NULL) | |
161 | hw_abort (me, "Missing \"reg\" property"); | |
162 | ||
163 | if (!hw_find_reg_array_property (me, "reg", 0, ®)) | |
164 | hw_abort (me, "\"reg\" property must contain three addr/size entries"); | |
165 | ||
166 | hw_unit_address_to_attach_address (hw_parent (me), | |
167 | ®.address, | |
168 | &attach_space, &attach_address, me); | |
169 | hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me); | |
170 | ||
171 | if (attach_size != BFIN_MMR_GPTIMER_SIZE) | |
172 | hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_GPTIMER_SIZE); | |
173 | ||
174 | hw_attach_address (hw_parent (me), | |
175 | 0, attach_space, attach_address, attach_size, me); | |
176 | ||
177 | gptimer->base = attach_address; | |
178 | } | |
179 | ||
180 | static void | |
181 | bfin_gptimer_finish (struct hw *me) | |
182 | { | |
183 | struct bfin_gptimer *gptimer; | |
184 | ||
185 | gptimer = HW_ZALLOC (me, struct bfin_gptimer); | |
186 | ||
187 | set_hw_data (me, gptimer); | |
188 | set_hw_io_read_buffer (me, bfin_gptimer_io_read_buffer); | |
189 | set_hw_io_write_buffer (me, bfin_gptimer_io_write_buffer); | |
190 | set_hw_ports (me, bfin_gptimer_ports); | |
191 | ||
192 | attach_bfin_gptimer_regs (me, gptimer); | |
193 | } | |
194 | ||
81d126c3 MF |
195 | const struct hw_descriptor dv_bfin_gptimer_descriptor[] = |
196 | { | |
ef016f83 MF |
197 | {"bfin_gptimer", bfin_gptimer_finish,}, |
198 | {NULL, NULL}, | |
199 | }; |