root / hw / grlib_gptimer.c @ 3e1c0c9a
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1 | 0f3a4a01 | Fabien Chouteau | /*
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2 | 0f3a4a01 | Fabien Chouteau | * QEMU GRLIB GPTimer Emulator
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3 | 0f3a4a01 | Fabien Chouteau | *
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4 | 0f3a4a01 | Fabien Chouteau | * Copyright (c) 2010-2011 AdaCore
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5 | 0f3a4a01 | Fabien Chouteau | *
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6 | 0f3a4a01 | Fabien Chouteau | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | 0f3a4a01 | Fabien Chouteau | * of this software and associated documentation files (the "Software"), to deal
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8 | 0f3a4a01 | Fabien Chouteau | * in the Software without restriction, including without limitation the rights
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9 | 0f3a4a01 | Fabien Chouteau | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | 0f3a4a01 | Fabien Chouteau | * copies of the Software, and to permit persons to whom the Software is
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11 | 0f3a4a01 | Fabien Chouteau | * furnished to do so, subject to the following conditions:
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12 | 0f3a4a01 | Fabien Chouteau | *
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13 | 0f3a4a01 | Fabien Chouteau | * The above copyright notice and this permission notice shall be included in
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14 | 0f3a4a01 | Fabien Chouteau | * all copies or substantial portions of the Software.
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15 | 0f3a4a01 | Fabien Chouteau | *
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16 | 0f3a4a01 | Fabien Chouteau | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | 0f3a4a01 | Fabien Chouteau | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | 0f3a4a01 | Fabien Chouteau | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | 0f3a4a01 | Fabien Chouteau | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | 0f3a4a01 | Fabien Chouteau | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | 0f3a4a01 | Fabien Chouteau | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | 0f3a4a01 | Fabien Chouteau | * THE SOFTWARE.
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23 | 0f3a4a01 | Fabien Chouteau | */
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24 | 0f3a4a01 | Fabien Chouteau | |
25 | 0f3a4a01 | Fabien Chouteau | #include "sysbus.h" |
26 | 0f3a4a01 | Fabien Chouteau | #include "qemu-timer.h" |
27 | 0f3a4a01 | Fabien Chouteau | |
28 | 0f3a4a01 | Fabien Chouteau | #include "trace.h" |
29 | 0f3a4a01 | Fabien Chouteau | |
30 | 0f3a4a01 | Fabien Chouteau | #define UNIT_REG_SIZE 16 /* Size of memory mapped regs for the unit */ |
31 | 0f3a4a01 | Fabien Chouteau | #define GPTIMER_REG_SIZE 16 /* Size of memory mapped regs for a GPTimer */ |
32 | 0f3a4a01 | Fabien Chouteau | |
33 | 0f3a4a01 | Fabien Chouteau | #define GPTIMER_MAX_TIMERS 8 |
34 | 0f3a4a01 | Fabien Chouteau | |
35 | 0f3a4a01 | Fabien Chouteau | /* GPTimer Config register fields */
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36 | 0f3a4a01 | Fabien Chouteau | #define GPTIMER_ENABLE (1 << 0) |
37 | 0f3a4a01 | Fabien Chouteau | #define GPTIMER_RESTART (1 << 1) |
38 | 0f3a4a01 | Fabien Chouteau | #define GPTIMER_LOAD (1 << 2) |
39 | 0f3a4a01 | Fabien Chouteau | #define GPTIMER_INT_ENABLE (1 << 3) |
40 | 0f3a4a01 | Fabien Chouteau | #define GPTIMER_INT_PENDING (1 << 4) |
41 | 0f3a4a01 | Fabien Chouteau | #define GPTIMER_CHAIN (1 << 5) /* Not supported */ |
42 | 0f3a4a01 | Fabien Chouteau | #define GPTIMER_DEBUG_HALT (1 << 6) /* Not supported */ |
43 | 0f3a4a01 | Fabien Chouteau | |
44 | 0f3a4a01 | Fabien Chouteau | /* Memory mapped register offsets */
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45 | 0f3a4a01 | Fabien Chouteau | #define SCALER_OFFSET 0x00 |
46 | 0f3a4a01 | Fabien Chouteau | #define SCALER_RELOAD_OFFSET 0x04 |
47 | 0f3a4a01 | Fabien Chouteau | #define CONFIG_OFFSET 0x08 |
48 | 0f3a4a01 | Fabien Chouteau | #define COUNTER_OFFSET 0x00 |
49 | 0f3a4a01 | Fabien Chouteau | #define COUNTER_RELOAD_OFFSET 0x04 |
50 | 0f3a4a01 | Fabien Chouteau | #define TIMER_BASE 0x10 |
51 | 0f3a4a01 | Fabien Chouteau | |
52 | 0f3a4a01 | Fabien Chouteau | typedef struct GPTimer GPTimer; |
53 | 0f3a4a01 | Fabien Chouteau | typedef struct GPTimerUnit GPTimerUnit; |
54 | 0f3a4a01 | Fabien Chouteau | |
55 | 0f3a4a01 | Fabien Chouteau | struct GPTimer {
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56 | 0f3a4a01 | Fabien Chouteau | QEMUBH *bh; |
57 | 0f3a4a01 | Fabien Chouteau | struct ptimer_state *ptimer;
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58 | 0f3a4a01 | Fabien Chouteau | |
59 | 0f3a4a01 | Fabien Chouteau | qemu_irq irq; |
60 | 0f3a4a01 | Fabien Chouteau | int id;
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61 | 0f3a4a01 | Fabien Chouteau | GPTimerUnit *unit; |
62 | 0f3a4a01 | Fabien Chouteau | |
63 | 0f3a4a01 | Fabien Chouteau | /* registers */
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64 | 0f3a4a01 | Fabien Chouteau | uint32_t counter; |
65 | 0f3a4a01 | Fabien Chouteau | uint32_t reload; |
66 | 0f3a4a01 | Fabien Chouteau | uint32_t config; |
67 | 0f3a4a01 | Fabien Chouteau | }; |
68 | 0f3a4a01 | Fabien Chouteau | |
69 | 0f3a4a01 | Fabien Chouteau | struct GPTimerUnit {
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70 | 0f3a4a01 | Fabien Chouteau | SysBusDevice busdev; |
71 | 0f3a4a01 | Fabien Chouteau | |
72 | 0f3a4a01 | Fabien Chouteau | uint32_t nr_timers; /* Number of timers available */
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73 | 0f3a4a01 | Fabien Chouteau | uint32_t freq_hz; /* System frequency */
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74 | 0f3a4a01 | Fabien Chouteau | uint32_t irq_line; /* Base irq line */
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75 | 0f3a4a01 | Fabien Chouteau | |
76 | 0f3a4a01 | Fabien Chouteau | GPTimer *timers; |
77 | 0f3a4a01 | Fabien Chouteau | |
78 | 0f3a4a01 | Fabien Chouteau | /* registers */
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79 | 0f3a4a01 | Fabien Chouteau | uint32_t scaler; |
80 | 0f3a4a01 | Fabien Chouteau | uint32_t reload; |
81 | 0f3a4a01 | Fabien Chouteau | uint32_t config; |
82 | 0f3a4a01 | Fabien Chouteau | }; |
83 | 0f3a4a01 | Fabien Chouteau | |
84 | 0f3a4a01 | Fabien Chouteau | static void grlib_gptimer_enable(GPTimer *timer) |
85 | 0f3a4a01 | Fabien Chouteau | { |
86 | 0f3a4a01 | Fabien Chouteau | assert(timer != NULL);
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87 | 0f3a4a01 | Fabien Chouteau | |
88 | 0f3a4a01 | Fabien Chouteau | |
89 | 0f3a4a01 | Fabien Chouteau | ptimer_stop(timer->ptimer); |
90 | 0f3a4a01 | Fabien Chouteau | |
91 | 0f3a4a01 | Fabien Chouteau | if (!(timer->config & GPTIMER_ENABLE)) {
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92 | 0f3a4a01 | Fabien Chouteau | /* Timer disabled */
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93 | 0f3a4a01 | Fabien Chouteau | trace_grlib_gptimer_disabled(timer->id, timer->config); |
94 | 0f3a4a01 | Fabien Chouteau | return;
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95 | 0f3a4a01 | Fabien Chouteau | } |
96 | 0f3a4a01 | Fabien Chouteau | |
97 | 0f3a4a01 | Fabien Chouteau | /* ptimer is triggered when the counter reach 0 but GPTimer is triggered at
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98 | 0f3a4a01 | Fabien Chouteau | underflow. Set count + 1 to simulate the GPTimer behavior. */
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99 | 0f3a4a01 | Fabien Chouteau | |
100 | 0f3a4a01 | Fabien Chouteau | trace_grlib_gptimer_enable(timer->id, timer->counter + 1);
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101 | 0f3a4a01 | Fabien Chouteau | |
102 | 0f3a4a01 | Fabien Chouteau | ptimer_set_count(timer->ptimer, timer->counter + 1);
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103 | 0f3a4a01 | Fabien Chouteau | ptimer_run(timer->ptimer, 1);
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104 | 0f3a4a01 | Fabien Chouteau | } |
105 | 0f3a4a01 | Fabien Chouteau | |
106 | 0f3a4a01 | Fabien Chouteau | static void grlib_gptimer_restart(GPTimer *timer) |
107 | 0f3a4a01 | Fabien Chouteau | { |
108 | 0f3a4a01 | Fabien Chouteau | assert(timer != NULL);
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109 | 0f3a4a01 | Fabien Chouteau | |
110 | 0f3a4a01 | Fabien Chouteau | trace_grlib_gptimer_restart(timer->id, timer->reload); |
111 | 0f3a4a01 | Fabien Chouteau | |
112 | 0f3a4a01 | Fabien Chouteau | timer->counter = timer->reload; |
113 | 0f3a4a01 | Fabien Chouteau | grlib_gptimer_enable(timer); |
114 | 0f3a4a01 | Fabien Chouteau | } |
115 | 0f3a4a01 | Fabien Chouteau | |
116 | 0f3a4a01 | Fabien Chouteau | static void grlib_gptimer_set_scaler(GPTimerUnit *unit, uint32_t scaler) |
117 | 0f3a4a01 | Fabien Chouteau | { |
118 | 0f3a4a01 | Fabien Chouteau | int i = 0; |
119 | 0f3a4a01 | Fabien Chouteau | uint32_t value = 0;
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120 | 0f3a4a01 | Fabien Chouteau | |
121 | 0f3a4a01 | Fabien Chouteau | assert(unit != NULL);
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122 | 0f3a4a01 | Fabien Chouteau | |
123 | 0f3a4a01 | Fabien Chouteau | if (scaler > 0) { |
124 | 0f3a4a01 | Fabien Chouteau | value = unit->freq_hz / (scaler + 1);
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125 | 0f3a4a01 | Fabien Chouteau | } else {
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126 | 0f3a4a01 | Fabien Chouteau | value = unit->freq_hz; |
127 | 0f3a4a01 | Fabien Chouteau | } |
128 | 0f3a4a01 | Fabien Chouteau | |
129 | 0f3a4a01 | Fabien Chouteau | trace_grlib_gptimer_set_scaler(scaler, value); |
130 | 0f3a4a01 | Fabien Chouteau | |
131 | 0f3a4a01 | Fabien Chouteau | for (i = 0; i < unit->nr_timers; i++) { |
132 | 0f3a4a01 | Fabien Chouteau | ptimer_set_freq(unit->timers[i].ptimer, value); |
133 | 0f3a4a01 | Fabien Chouteau | } |
134 | 0f3a4a01 | Fabien Chouteau | } |
135 | 0f3a4a01 | Fabien Chouteau | |
136 | 0f3a4a01 | Fabien Chouteau | static void grlib_gptimer_hit(void *opaque) |
137 | 0f3a4a01 | Fabien Chouteau | { |
138 | 0f3a4a01 | Fabien Chouteau | GPTimer *timer = opaque; |
139 | 0f3a4a01 | Fabien Chouteau | assert(timer != NULL);
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140 | 0f3a4a01 | Fabien Chouteau | |
141 | 0f3a4a01 | Fabien Chouteau | trace_grlib_gptimer_hit(timer->id); |
142 | 0f3a4a01 | Fabien Chouteau | |
143 | 0f3a4a01 | Fabien Chouteau | /* Timer expired */
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144 | 0f3a4a01 | Fabien Chouteau | |
145 | 0f3a4a01 | Fabien Chouteau | if (timer->config & GPTIMER_INT_ENABLE) {
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146 | 0f3a4a01 | Fabien Chouteau | /* Set the pending bit (only unset by write in the config register) */
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147 | 0f3a4a01 | Fabien Chouteau | timer->config |= GPTIMER_INT_PENDING; |
148 | 0f3a4a01 | Fabien Chouteau | qemu_irq_pulse(timer->irq); |
149 | 0f3a4a01 | Fabien Chouteau | } |
150 | 0f3a4a01 | Fabien Chouteau | |
151 | 0f3a4a01 | Fabien Chouteau | if (timer->config & GPTIMER_RESTART) {
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152 | 0f3a4a01 | Fabien Chouteau | grlib_gptimer_restart(timer); |
153 | 0f3a4a01 | Fabien Chouteau | } |
154 | 0f3a4a01 | Fabien Chouteau | } |
155 | 0f3a4a01 | Fabien Chouteau | |
156 | 0f3a4a01 | Fabien Chouteau | static uint32_t grlib_gptimer_readl(void *opaque, target_phys_addr_t addr) |
157 | 0f3a4a01 | Fabien Chouteau | { |
158 | 0f3a4a01 | Fabien Chouteau | GPTimerUnit *unit = opaque; |
159 | 0f3a4a01 | Fabien Chouteau | target_phys_addr_t timer_addr; |
160 | 0f3a4a01 | Fabien Chouteau | int id;
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161 | 0f3a4a01 | Fabien Chouteau | uint32_t value = 0;
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162 | 0f3a4a01 | Fabien Chouteau | |
163 | 0f3a4a01 | Fabien Chouteau | addr &= 0xff;
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164 | 0f3a4a01 | Fabien Chouteau | |
165 | 0f3a4a01 | Fabien Chouteau | /* Unit registers */
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166 | 0f3a4a01 | Fabien Chouteau | switch (addr) {
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167 | 0f3a4a01 | Fabien Chouteau | case SCALER_OFFSET:
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168 | b4548fcc | Stefan Hajnoczi | trace_grlib_gptimer_readl(-1, addr, unit->scaler);
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169 | 0f3a4a01 | Fabien Chouteau | return unit->scaler;
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170 | 0f3a4a01 | Fabien Chouteau | |
171 | 0f3a4a01 | Fabien Chouteau | case SCALER_RELOAD_OFFSET:
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172 | b4548fcc | Stefan Hajnoczi | trace_grlib_gptimer_readl(-1, addr, unit->reload);
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173 | 0f3a4a01 | Fabien Chouteau | return unit->reload;
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174 | 0f3a4a01 | Fabien Chouteau | |
175 | 0f3a4a01 | Fabien Chouteau | case CONFIG_OFFSET:
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176 | b4548fcc | Stefan Hajnoczi | trace_grlib_gptimer_readl(-1, addr, unit->config);
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177 | 0f3a4a01 | Fabien Chouteau | return unit->config;
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178 | 0f3a4a01 | Fabien Chouteau | |
179 | 0f3a4a01 | Fabien Chouteau | default:
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180 | 0f3a4a01 | Fabien Chouteau | break;
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181 | 0f3a4a01 | Fabien Chouteau | } |
182 | 0f3a4a01 | Fabien Chouteau | |
183 | 0f3a4a01 | Fabien Chouteau | timer_addr = (addr % TIMER_BASE); |
184 | 0f3a4a01 | Fabien Chouteau | id = (addr - TIMER_BASE) / TIMER_BASE; |
185 | 0f3a4a01 | Fabien Chouteau | |
186 | 0f3a4a01 | Fabien Chouteau | if (id >= 0 && id < unit->nr_timers) { |
187 | 0f3a4a01 | Fabien Chouteau | |
188 | 0f3a4a01 | Fabien Chouteau | /* GPTimer registers */
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189 | 0f3a4a01 | Fabien Chouteau | switch (timer_addr) {
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190 | 0f3a4a01 | Fabien Chouteau | case COUNTER_OFFSET:
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191 | 0f3a4a01 | Fabien Chouteau | value = ptimer_get_count(unit->timers[id].ptimer); |
192 | b4548fcc | Stefan Hajnoczi | trace_grlib_gptimer_readl(id, addr, value); |
193 | 0f3a4a01 | Fabien Chouteau | return value;
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194 | 0f3a4a01 | Fabien Chouteau | |
195 | 0f3a4a01 | Fabien Chouteau | case COUNTER_RELOAD_OFFSET:
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196 | 0f3a4a01 | Fabien Chouteau | value = unit->timers[id].reload; |
197 | b4548fcc | Stefan Hajnoczi | trace_grlib_gptimer_readl(id, addr, value); |
198 | 0f3a4a01 | Fabien Chouteau | return value;
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199 | 0f3a4a01 | Fabien Chouteau | |
200 | 0f3a4a01 | Fabien Chouteau | case CONFIG_OFFSET:
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201 | b4548fcc | Stefan Hajnoczi | trace_grlib_gptimer_readl(id, addr, unit->timers[id].config); |
202 | 0f3a4a01 | Fabien Chouteau | return unit->timers[id].config;
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203 | 0f3a4a01 | Fabien Chouteau | |
204 | 0f3a4a01 | Fabien Chouteau | default:
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205 | 0f3a4a01 | Fabien Chouteau | break;
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206 | 0f3a4a01 | Fabien Chouteau | } |
207 | 0f3a4a01 | Fabien Chouteau | |
208 | 0f3a4a01 | Fabien Chouteau | } |
209 | 0f3a4a01 | Fabien Chouteau | |
210 | b4548fcc | Stefan Hajnoczi | trace_grlib_gptimer_readl(-1, addr, 0); |
211 | 0f3a4a01 | Fabien Chouteau | return 0; |
212 | 0f3a4a01 | Fabien Chouteau | } |
213 | 0f3a4a01 | Fabien Chouteau | |
214 | 0f3a4a01 | Fabien Chouteau | static void |
215 | 0f3a4a01 | Fabien Chouteau | grlib_gptimer_writel(void *opaque, target_phys_addr_t addr, uint32_t value)
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216 | 0f3a4a01 | Fabien Chouteau | { |
217 | 0f3a4a01 | Fabien Chouteau | GPTimerUnit *unit = opaque; |
218 | 0f3a4a01 | Fabien Chouteau | target_phys_addr_t timer_addr; |
219 | 0f3a4a01 | Fabien Chouteau | int id;
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220 | 0f3a4a01 | Fabien Chouteau | |
221 | 0f3a4a01 | Fabien Chouteau | addr &= 0xff;
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222 | 0f3a4a01 | Fabien Chouteau | |
223 | 0f3a4a01 | Fabien Chouteau | /* Unit registers */
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224 | 0f3a4a01 | Fabien Chouteau | switch (addr) {
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225 | 0f3a4a01 | Fabien Chouteau | case SCALER_OFFSET:
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226 | 0f3a4a01 | Fabien Chouteau | value &= 0xFFFF; /* clean up the value */ |
227 | 0f3a4a01 | Fabien Chouteau | unit->scaler = value; |
228 | b4548fcc | Stefan Hajnoczi | trace_grlib_gptimer_writel(-1, addr, unit->scaler);
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229 | 0f3a4a01 | Fabien Chouteau | return;
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230 | 0f3a4a01 | Fabien Chouteau | |
231 | 0f3a4a01 | Fabien Chouteau | case SCALER_RELOAD_OFFSET:
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232 | 0f3a4a01 | Fabien Chouteau | value &= 0xFFFF; /* clean up the value */ |
233 | 0f3a4a01 | Fabien Chouteau | unit->reload = value; |
234 | b4548fcc | Stefan Hajnoczi | trace_grlib_gptimer_writel(-1, addr, unit->reload);
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235 | 0f3a4a01 | Fabien Chouteau | grlib_gptimer_set_scaler(unit, value); |
236 | 0f3a4a01 | Fabien Chouteau | return;
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237 | 0f3a4a01 | Fabien Chouteau | |
238 | 0f3a4a01 | Fabien Chouteau | case CONFIG_OFFSET:
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239 | 0f3a4a01 | Fabien Chouteau | /* Read Only (disable timer freeze not supported) */
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240 | b4548fcc | Stefan Hajnoczi | trace_grlib_gptimer_writel(-1, addr, 0); |
241 | 0f3a4a01 | Fabien Chouteau | return;
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242 | 0f3a4a01 | Fabien Chouteau | |
243 | 0f3a4a01 | Fabien Chouteau | default:
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244 | 0f3a4a01 | Fabien Chouteau | break;
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245 | 0f3a4a01 | Fabien Chouteau | } |
246 | 0f3a4a01 | Fabien Chouteau | |
247 | 0f3a4a01 | Fabien Chouteau | timer_addr = (addr % TIMER_BASE); |
248 | 0f3a4a01 | Fabien Chouteau | id = (addr - TIMER_BASE) / TIMER_BASE; |
249 | 0f3a4a01 | Fabien Chouteau | |
250 | 0f3a4a01 | Fabien Chouteau | if (id >= 0 && id < unit->nr_timers) { |
251 | 0f3a4a01 | Fabien Chouteau | |
252 | 0f3a4a01 | Fabien Chouteau | /* GPTimer registers */
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253 | 0f3a4a01 | Fabien Chouteau | switch (timer_addr) {
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254 | 0f3a4a01 | Fabien Chouteau | case COUNTER_OFFSET:
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255 | b4548fcc | Stefan Hajnoczi | trace_grlib_gptimer_writel(id, addr, value); |
256 | 0f3a4a01 | Fabien Chouteau | unit->timers[id].counter = value; |
257 | 0f3a4a01 | Fabien Chouteau | grlib_gptimer_enable(&unit->timers[id]); |
258 | 0f3a4a01 | Fabien Chouteau | return;
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259 | 0f3a4a01 | Fabien Chouteau | |
260 | 0f3a4a01 | Fabien Chouteau | case COUNTER_RELOAD_OFFSET:
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261 | b4548fcc | Stefan Hajnoczi | trace_grlib_gptimer_writel(id, addr, value); |
262 | 0f3a4a01 | Fabien Chouteau | unit->timers[id].reload = value; |
263 | 0f3a4a01 | Fabien Chouteau | return;
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264 | 0f3a4a01 | Fabien Chouteau | |
265 | 0f3a4a01 | Fabien Chouteau | case CONFIG_OFFSET:
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266 | b4548fcc | Stefan Hajnoczi | trace_grlib_gptimer_writel(id, addr, value); |
267 | 0f3a4a01 | Fabien Chouteau | |
268 | 0f3a4a01 | Fabien Chouteau | if (value & GPTIMER_INT_PENDING) {
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269 | 0f3a4a01 | Fabien Chouteau | /* clear pending bit */
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270 | 0f3a4a01 | Fabien Chouteau | value &= ~GPTIMER_INT_PENDING; |
271 | 0f3a4a01 | Fabien Chouteau | } else {
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272 | 0f3a4a01 | Fabien Chouteau | /* keep pending bit */
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273 | 0f3a4a01 | Fabien Chouteau | value |= unit->timers[id].config & GPTIMER_INT_PENDING; |
274 | 0f3a4a01 | Fabien Chouteau | } |
275 | 0f3a4a01 | Fabien Chouteau | |
276 | 0f3a4a01 | Fabien Chouteau | unit->timers[id].config = value; |
277 | 0f3a4a01 | Fabien Chouteau | |
278 | 0f3a4a01 | Fabien Chouteau | /* gptimer_restart calls gptimer_enable, so if "enable" and "load"
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279 | 0f3a4a01 | Fabien Chouteau | bits are present, we just have to call restart. */
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280 | 0f3a4a01 | Fabien Chouteau | |
281 | 0f3a4a01 | Fabien Chouteau | if (value & GPTIMER_LOAD) {
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282 | 0f3a4a01 | Fabien Chouteau | grlib_gptimer_restart(&unit->timers[id]); |
283 | 0f3a4a01 | Fabien Chouteau | } else if (value & GPTIMER_ENABLE) { |
284 | 0f3a4a01 | Fabien Chouteau | grlib_gptimer_enable(&unit->timers[id]); |
285 | 0f3a4a01 | Fabien Chouteau | } |
286 | 0f3a4a01 | Fabien Chouteau | |
287 | 0f3a4a01 | Fabien Chouteau | /* These fields must always be read as 0 */
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288 | 0f3a4a01 | Fabien Chouteau | value &= ~(GPTIMER_LOAD & GPTIMER_DEBUG_HALT); |
289 | 0f3a4a01 | Fabien Chouteau | |
290 | 0f3a4a01 | Fabien Chouteau | unit->timers[id].config = value; |
291 | 0f3a4a01 | Fabien Chouteau | return;
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292 | 0f3a4a01 | Fabien Chouteau | |
293 | 0f3a4a01 | Fabien Chouteau | default:
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294 | 0f3a4a01 | Fabien Chouteau | break;
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295 | 0f3a4a01 | Fabien Chouteau | } |
296 | 0f3a4a01 | Fabien Chouteau | |
297 | 0f3a4a01 | Fabien Chouteau | } |
298 | 0f3a4a01 | Fabien Chouteau | |
299 | b4548fcc | Stefan Hajnoczi | trace_grlib_gptimer_writel(-1, addr, value);
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300 | 0f3a4a01 | Fabien Chouteau | } |
301 | 0f3a4a01 | Fabien Chouteau | |
302 | 0f3a4a01 | Fabien Chouteau | static CPUReadMemoryFunc * const grlib_gptimer_read[] = { |
303 | 0f3a4a01 | Fabien Chouteau | NULL, NULL, grlib_gptimer_readl, |
304 | 0f3a4a01 | Fabien Chouteau | }; |
305 | 0f3a4a01 | Fabien Chouteau | |
306 | 0f3a4a01 | Fabien Chouteau | static CPUWriteMemoryFunc * const grlib_gptimer_write[] = { |
307 | 0f3a4a01 | Fabien Chouteau | NULL, NULL, grlib_gptimer_writel, |
308 | 0f3a4a01 | Fabien Chouteau | }; |
309 | 0f3a4a01 | Fabien Chouteau | |
310 | 0f3a4a01 | Fabien Chouteau | static void grlib_gptimer_reset(DeviceState *d) |
311 | 0f3a4a01 | Fabien Chouteau | { |
312 | 0f3a4a01 | Fabien Chouteau | GPTimerUnit *unit = container_of(d, GPTimerUnit, busdev.qdev); |
313 | 0f3a4a01 | Fabien Chouteau | int i = 0; |
314 | 0f3a4a01 | Fabien Chouteau | |
315 | 0f3a4a01 | Fabien Chouteau | assert(unit != NULL);
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316 | 0f3a4a01 | Fabien Chouteau | |
317 | 0f3a4a01 | Fabien Chouteau | unit->scaler = 0;
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318 | 0f3a4a01 | Fabien Chouteau | unit->reload = 0;
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319 | 0f3a4a01 | Fabien Chouteau | unit->config = 0;
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320 | 0f3a4a01 | Fabien Chouteau | |
321 | 0f3a4a01 | Fabien Chouteau | unit->config = unit->nr_timers; |
322 | 0f3a4a01 | Fabien Chouteau | unit->config |= unit->irq_line << 3;
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323 | 0f3a4a01 | Fabien Chouteau | unit->config |= 1 << 8; /* separate interrupt */ |
324 | 0f3a4a01 | Fabien Chouteau | unit->config |= 1 << 9; /* Disable timer freeze */ |
325 | 0f3a4a01 | Fabien Chouteau | |
326 | 0f3a4a01 | Fabien Chouteau | |
327 | 0f3a4a01 | Fabien Chouteau | for (i = 0; i < unit->nr_timers; i++) { |
328 | 0f3a4a01 | Fabien Chouteau | GPTimer *timer = &unit->timers[i]; |
329 | 0f3a4a01 | Fabien Chouteau | |
330 | 0f3a4a01 | Fabien Chouteau | timer->counter = 0;
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331 | 0f3a4a01 | Fabien Chouteau | timer->reload = 0;
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332 | 0f3a4a01 | Fabien Chouteau | timer->config = 0;
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333 | 0f3a4a01 | Fabien Chouteau | ptimer_stop(timer->ptimer); |
334 | 0f3a4a01 | Fabien Chouteau | ptimer_set_count(timer->ptimer, 0);
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335 | 0f3a4a01 | Fabien Chouteau | ptimer_set_freq(timer->ptimer, unit->freq_hz); |
336 | 0f3a4a01 | Fabien Chouteau | } |
337 | 0f3a4a01 | Fabien Chouteau | } |
338 | 0f3a4a01 | Fabien Chouteau | |
339 | 0f3a4a01 | Fabien Chouteau | static int grlib_gptimer_init(SysBusDevice *dev) |
340 | 0f3a4a01 | Fabien Chouteau | { |
341 | 0f3a4a01 | Fabien Chouteau | GPTimerUnit *unit = FROM_SYSBUS(typeof(*unit), dev); |
342 | 0f3a4a01 | Fabien Chouteau | unsigned int i; |
343 | 0f3a4a01 | Fabien Chouteau | int timer_regs;
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344 | 0f3a4a01 | Fabien Chouteau | |
345 | 0f3a4a01 | Fabien Chouteau | assert(unit->nr_timers > 0);
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346 | 0f3a4a01 | Fabien Chouteau | assert(unit->nr_timers <= GPTIMER_MAX_TIMERS); |
347 | 0f3a4a01 | Fabien Chouteau | |
348 | 0f3a4a01 | Fabien Chouteau | unit->timers = qemu_mallocz(sizeof unit->timers[0] * unit->nr_timers); |
349 | 0f3a4a01 | Fabien Chouteau | |
350 | 0f3a4a01 | Fabien Chouteau | for (i = 0; i < unit->nr_timers; i++) { |
351 | 0f3a4a01 | Fabien Chouteau | GPTimer *timer = &unit->timers[i]; |
352 | 0f3a4a01 | Fabien Chouteau | |
353 | 0f3a4a01 | Fabien Chouteau | timer->unit = unit; |
354 | 0f3a4a01 | Fabien Chouteau | timer->bh = qemu_bh_new(grlib_gptimer_hit, timer); |
355 | 0f3a4a01 | Fabien Chouteau | timer->ptimer = ptimer_init(timer->bh); |
356 | 0f3a4a01 | Fabien Chouteau | timer->id = i; |
357 | 0f3a4a01 | Fabien Chouteau | |
358 | 0f3a4a01 | Fabien Chouteau | /* One IRQ line for each timer */
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359 | 0f3a4a01 | Fabien Chouteau | sysbus_init_irq(dev, &timer->irq); |
360 | 0f3a4a01 | Fabien Chouteau | |
361 | 0f3a4a01 | Fabien Chouteau | ptimer_set_freq(timer->ptimer, unit->freq_hz); |
362 | 0f3a4a01 | Fabien Chouteau | } |
363 | 0f3a4a01 | Fabien Chouteau | |
364 | 0f3a4a01 | Fabien Chouteau | timer_regs = cpu_register_io_memory(grlib_gptimer_read, |
365 | 0f3a4a01 | Fabien Chouteau | grlib_gptimer_write, |
366 | 0f3a4a01 | Fabien Chouteau | unit, DEVICE_NATIVE_ENDIAN); |
367 | 0f3a4a01 | Fabien Chouteau | if (timer_regs < 0) { |
368 | 0f3a4a01 | Fabien Chouteau | return -1; |
369 | 0f3a4a01 | Fabien Chouteau | } |
370 | 0f3a4a01 | Fabien Chouteau | |
371 | 0f3a4a01 | Fabien Chouteau | sysbus_init_mmio(dev, UNIT_REG_SIZE + GPTIMER_REG_SIZE * unit->nr_timers, |
372 | 0f3a4a01 | Fabien Chouteau | timer_regs); |
373 | 0f3a4a01 | Fabien Chouteau | return 0; |
374 | 0f3a4a01 | Fabien Chouteau | } |
375 | 0f3a4a01 | Fabien Chouteau | |
376 | 0f3a4a01 | Fabien Chouteau | static SysBusDeviceInfo grlib_gptimer_info = {
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377 | 0f3a4a01 | Fabien Chouteau | .init = grlib_gptimer_init, |
378 | 0f3a4a01 | Fabien Chouteau | .qdev.name = "grlib,gptimer",
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379 | 0f3a4a01 | Fabien Chouteau | .qdev.reset = grlib_gptimer_reset, |
380 | 0f3a4a01 | Fabien Chouteau | .qdev.size = sizeof(GPTimerUnit),
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381 | 0f3a4a01 | Fabien Chouteau | .qdev.props = (Property[]) { |
382 | 0f3a4a01 | Fabien Chouteau | DEFINE_PROP_UINT32("frequency", GPTimerUnit, freq_hz, 40000000), |
383 | 0f3a4a01 | Fabien Chouteau | DEFINE_PROP_UINT32("irq-line", GPTimerUnit, irq_line, 8), |
384 | 0f3a4a01 | Fabien Chouteau | DEFINE_PROP_UINT32("nr-timers", GPTimerUnit, nr_timers, 2), |
385 | 0f3a4a01 | Fabien Chouteau | DEFINE_PROP_END_OF_LIST() |
386 | 0f3a4a01 | Fabien Chouteau | } |
387 | 0f3a4a01 | Fabien Chouteau | }; |
388 | 0f3a4a01 | Fabien Chouteau | |
389 | 0f3a4a01 | Fabien Chouteau | static void grlib_gptimer_register(void) |
390 | 0f3a4a01 | Fabien Chouteau | { |
391 | 0f3a4a01 | Fabien Chouteau | sysbus_register_withprop(&grlib_gptimer_info); |
392 | 0f3a4a01 | Fabien Chouteau | } |
393 | 0f3a4a01 | Fabien Chouteau | |
394 | 0f3a4a01 | Fabien Chouteau | device_init(grlib_gptimer_register) |