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ef016f83 MF |
1 | /* Blackfin General Purpose Timers (GPtimer) model |
2 | ||
ecd75fc8 | 3 | Copyright (C) 2010-2014 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 | ||
21 | #include "config.h" | |
22 | ||
23 | #include "sim-main.h" | |
24 | #include "devices.h" | |
25 | #include "dv-bfin_gptimer.h" | |
26 | ||
27 | /* XXX: This is merely a stub. */ | |
28 | ||
29 | struct bfin_gptimer | |
30 | { | |
31 | /* This top portion matches common dv_bfin struct. */ | |
32 | bu32 base; | |
33 | struct hw *dma_master; | |
34 | bool acked; | |
35 | ||
36 | struct hw_event *handler; | |
37 | char saved_byte; | |
38 | int saved_count; | |
39 | ||
40 | /* Order after here is important -- matches hardware MMR layout. */ | |
41 | bu16 BFIN_MMR_16(config); | |
42 | bu32 counter, period, width; | |
43 | }; | |
44 | #define mmr_base() offsetof(struct bfin_gptimer, config) | |
45 | #define mmr_offset(mmr) (offsetof(struct bfin_gptimer, mmr) - mmr_base()) | |
46 | ||
990d19fd MF |
47 | static const char * const mmr_names[] = |
48 | { | |
ef016f83 MF |
49 | "TIMER_CONFIG", "TIMER_COUNTER", "TIMER_PERIOD", "TIMER_WIDTH", |
50 | }; | |
51 | #define mmr_name(off) mmr_names[(off) / 4] | |
52 | ||
53 | static unsigned | |
54 | bfin_gptimer_io_write_buffer (struct hw *me, const void *source, int space, | |
55 | address_word addr, unsigned nr_bytes) | |
56 | { | |
57 | struct bfin_gptimer *gptimer = hw_data (me); | |
58 | bu32 mmr_off; | |
59 | bu32 value; | |
60 | bu16 *value16p; | |
61 | bu32 *value32p; | |
62 | void *valuep; | |
63 | ||
64 | if (nr_bytes == 4) | |
65 | value = dv_load_4 (source); | |
66 | else | |
67 | value = dv_load_2 (source); | |
68 | ||
69 | mmr_off = addr - gptimer->base; | |
70 | valuep = (void *)((unsigned long)gptimer + mmr_base() + mmr_off); | |
71 | value16p = valuep; | |
72 | value32p = valuep; | |
73 | ||
74 | HW_TRACE_WRITE (); | |
75 | ||
76 | switch (mmr_off) | |
77 | { | |
78 | case mmr_offset(config): | |
79 | dv_bfin_mmr_require_16 (me, addr, nr_bytes, true); | |
80 | *value16p = value; | |
81 | break; | |
82 | case mmr_offset(counter): | |
83 | case mmr_offset(period): | |
84 | case mmr_offset(width): | |
85 | dv_bfin_mmr_require_32 (me, addr, nr_bytes, true); | |
86 | *value32p = value; | |
87 | break; | |
88 | default: | |
89 | dv_bfin_mmr_invalid (me, addr, nr_bytes, true); | |
90 | break; | |
91 | } | |
92 | ||
93 | return nr_bytes; | |
94 | } | |
95 | ||
96 | static unsigned | |
97 | bfin_gptimer_io_read_buffer (struct hw *me, void *dest, int space, | |
98 | address_word addr, unsigned nr_bytes) | |
99 | { | |
100 | struct bfin_gptimer *gptimer = hw_data (me); | |
101 | bu32 mmr_off; | |
102 | bu16 *value16p; | |
103 | bu32 *value32p; | |
104 | void *valuep; | |
105 | ||
106 | mmr_off = addr - gptimer->base; | |
107 | valuep = (void *)((unsigned long)gptimer + mmr_base() + mmr_off); | |
108 | value16p = valuep; | |
109 | value32p = valuep; | |
110 | ||
111 | HW_TRACE_READ (); | |
112 | ||
113 | switch (mmr_off) | |
114 | { | |
115 | case mmr_offset(config): | |
116 | dv_bfin_mmr_require_16 (me, addr, nr_bytes, false); | |
117 | dv_store_2 (dest, *value16p); | |
118 | break; | |
119 | case mmr_offset(counter): | |
120 | case mmr_offset(period): | |
121 | case mmr_offset(width): | |
122 | dv_bfin_mmr_require_32 (me, addr, nr_bytes, false); | |
123 | dv_store_4 (dest, *value32p); | |
124 | break; | |
125 | default: | |
126 | dv_bfin_mmr_invalid (me, addr, nr_bytes, false); | |
127 | break; | |
128 | } | |
129 | ||
130 | return nr_bytes; | |
131 | } | |
132 | ||
990d19fd MF |
133 | static const struct hw_port_descriptor bfin_gptimer_ports[] = |
134 | { | |
ef016f83 MF |
135 | { "stat", 0, 0, output_port, }, |
136 | { NULL, 0, 0, 0, }, | |
137 | }; | |
138 | ||
139 | static void | |
140 | attach_bfin_gptimer_regs (struct hw *me, struct bfin_gptimer *gptimer) | |
141 | { | |
142 | address_word attach_address; | |
143 | int attach_space; | |
144 | unsigned attach_size; | |
145 | reg_property_spec reg; | |
146 | ||
147 | if (hw_find_property (me, "reg") == NULL) | |
148 | hw_abort (me, "Missing \"reg\" property"); | |
149 | ||
150 | if (!hw_find_reg_array_property (me, "reg", 0, ®)) | |
151 | hw_abort (me, "\"reg\" property must contain three addr/size entries"); | |
152 | ||
153 | hw_unit_address_to_attach_address (hw_parent (me), | |
154 | ®.address, | |
155 | &attach_space, &attach_address, me); | |
156 | hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me); | |
157 | ||
158 | if (attach_size != BFIN_MMR_GPTIMER_SIZE) | |
159 | hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_GPTIMER_SIZE); | |
160 | ||
161 | hw_attach_address (hw_parent (me), | |
162 | 0, attach_space, attach_address, attach_size, me); | |
163 | ||
164 | gptimer->base = attach_address; | |
165 | } | |
166 | ||
167 | static void | |
168 | bfin_gptimer_finish (struct hw *me) | |
169 | { | |
170 | struct bfin_gptimer *gptimer; | |
171 | ||
172 | gptimer = HW_ZALLOC (me, struct bfin_gptimer); | |
173 | ||
174 | set_hw_data (me, gptimer); | |
175 | set_hw_io_read_buffer (me, bfin_gptimer_io_read_buffer); | |
176 | set_hw_io_write_buffer (me, bfin_gptimer_io_write_buffer); | |
177 | set_hw_ports (me, bfin_gptimer_ports); | |
178 | ||
179 | attach_bfin_gptimer_regs (me, gptimer); | |
180 | } | |
181 | ||
81d126c3 MF |
182 | const struct hw_descriptor dv_bfin_gptimer_descriptor[] = |
183 | { | |
ef016f83 MF |
184 | {"bfin_gptimer", bfin_gptimer_finish,}, |
185 | {NULL, NULL}, | |
186 | }; |