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1 | 16b29ae1 | aliguori | /*
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2 | 16b29ae1 | aliguori | * High Precisition Event Timer emulation
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3 | 16b29ae1 | aliguori | *
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4 | 16b29ae1 | aliguori | * Copyright (c) 2007 Alexander Graf
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5 | 16b29ae1 | aliguori | * Copyright (c) 2008 IBM Corporation
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6 | 16b29ae1 | aliguori | *
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7 | 16b29ae1 | aliguori | * Authors: Beth Kon <bkon@us.ibm.com>
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8 | 16b29ae1 | aliguori | *
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9 | 16b29ae1 | aliguori | * This library is free software; you can redistribute it and/or
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10 | 16b29ae1 | aliguori | * modify it under the terms of the GNU Lesser General Public
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11 | 16b29ae1 | aliguori | * License as published by the Free Software Foundation; either
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12 | 16b29ae1 | aliguori | * version 2 of the License, or (at your option) any later version.
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13 | 16b29ae1 | aliguori | *
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14 | 16b29ae1 | aliguori | * This library is distributed in the hope that it will be useful,
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15 | 16b29ae1 | aliguori | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 | 16b29ae1 | aliguori | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 | 16b29ae1 | aliguori | * Lesser General Public License for more details.
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18 | 16b29ae1 | aliguori | *
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19 | 16b29ae1 | aliguori | * You should have received a copy of the GNU Lesser General Public
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20 | 8167ee88 | Blue Swirl | * License along with this library; if not, see <http://www.gnu.org/licenses/>.
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21 | 16b29ae1 | aliguori | *
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22 | 16b29ae1 | aliguori | * *****************************************************************
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23 | 16b29ae1 | aliguori | *
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24 | 16b29ae1 | aliguori | * This driver attempts to emulate an HPET device in software.
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25 | 16b29ae1 | aliguori | */
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26 | 16b29ae1 | aliguori | |
27 | 16b29ae1 | aliguori | #include "hw.h" |
28 | bf4f74c0 | aurel32 | #include "pc.h" |
29 | 16b29ae1 | aliguori | #include "console.h" |
30 | 16b29ae1 | aliguori | #include "qemu-timer.h" |
31 | 16b29ae1 | aliguori | #include "hpet_emul.h" |
32 | 822557eb | Jan Kiszka | #include "sysbus.h" |
33 | 7d932dfd | Jan Kiszka | #include "mc146818rtc.h" |
34 | 16b29ae1 | aliguori | |
35 | 16b29ae1 | aliguori | //#define HPET_DEBUG
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36 | 16b29ae1 | aliguori | #ifdef HPET_DEBUG
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37 | d0f2c4c6 | malc | #define DPRINTF printf
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38 | 16b29ae1 | aliguori | #else
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39 | d0f2c4c6 | malc | #define DPRINTF(...)
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40 | 16b29ae1 | aliguori | #endif
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41 | 16b29ae1 | aliguori | |
42 | 8caa0065 | Jan Kiszka | #define HPET_MSI_SUPPORT 0 |
43 | 8caa0065 | Jan Kiszka | |
44 | 27bb0b2d | Jan Kiszka | struct HPETState;
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45 | 27bb0b2d | Jan Kiszka | typedef struct HPETTimer { /* timers */ |
46 | 27bb0b2d | Jan Kiszka | uint8_t tn; /*timer number*/
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47 | 27bb0b2d | Jan Kiszka | QEMUTimer *qemu_timer; |
48 | 27bb0b2d | Jan Kiszka | struct HPETState *state;
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49 | 27bb0b2d | Jan Kiszka | /* Memory-mapped, software visible timer registers */
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50 | 27bb0b2d | Jan Kiszka | uint64_t config; /* configuration/cap */
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51 | 27bb0b2d | Jan Kiszka | uint64_t cmp; /* comparator */
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52 | 8caa0065 | Jan Kiszka | uint64_t fsb; /* FSB route */
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53 | 27bb0b2d | Jan Kiszka | /* Hidden register state */
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54 | 27bb0b2d | Jan Kiszka | uint64_t period; /* Last value written to comparator */
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55 | 27bb0b2d | Jan Kiszka | uint8_t wrap_flag; /* timer pop will indicate wrap for one-shot 32-bit
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56 | 27bb0b2d | Jan Kiszka | * mode. Next pop will be actual timer expiration.
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57 | 27bb0b2d | Jan Kiszka | */
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58 | 27bb0b2d | Jan Kiszka | } HPETTimer; |
59 | 27bb0b2d | Jan Kiszka | |
60 | 27bb0b2d | Jan Kiszka | typedef struct HPETState { |
61 | 822557eb | Jan Kiszka | SysBusDevice busdev; |
62 | e977aa37 | Avi Kivity | MemoryRegion iomem; |
63 | 27bb0b2d | Jan Kiszka | uint64_t hpet_offset; |
64 | 822557eb | Jan Kiszka | qemu_irq irqs[HPET_NUM_IRQ_ROUTES]; |
65 | 8caa0065 | Jan Kiszka | uint32_t flags; |
66 | 7d932dfd | Jan Kiszka | uint8_t rtc_irq_level; |
67 | be4b44c5 | Jan Kiszka | uint8_t num_timers; |
68 | be4b44c5 | Jan Kiszka | HPETTimer timer[HPET_MAX_TIMERS]; |
69 | 27bb0b2d | Jan Kiszka | |
70 | 27bb0b2d | Jan Kiszka | /* Memory-mapped, software visible registers */
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71 | 27bb0b2d | Jan Kiszka | uint64_t capability; /* capabilities */
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72 | 27bb0b2d | Jan Kiszka | uint64_t config; /* configuration */
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73 | 27bb0b2d | Jan Kiszka | uint64_t isr; /* interrupt status reg */
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74 | 27bb0b2d | Jan Kiszka | uint64_t hpet_counter; /* main counter */
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75 | 40ac17cd | Gleb Natapov | uint8_t hpet_id; /* instance id */
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76 | 27bb0b2d | Jan Kiszka | } HPETState; |
77 | 27bb0b2d | Jan Kiszka | |
78 | 7d932dfd | Jan Kiszka | static uint32_t hpet_in_legacy_mode(HPETState *s)
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79 | 16b29ae1 | aliguori | { |
80 | 7d932dfd | Jan Kiszka | return s->config & HPET_CFG_LEGACY;
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81 | 16b29ae1 | aliguori | } |
82 | 16b29ae1 | aliguori | |
83 | c50c2d68 | aurel32 | static uint32_t timer_int_route(struct HPETTimer *timer) |
84 | 16b29ae1 | aliguori | { |
85 | 27bb0b2d | Jan Kiszka | return (timer->config & HPET_TN_INT_ROUTE_MASK) >> HPET_TN_INT_ROUTE_SHIFT;
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86 | 16b29ae1 | aliguori | } |
87 | 16b29ae1 | aliguori | |
88 | 8caa0065 | Jan Kiszka | static uint32_t timer_fsb_route(HPETTimer *t)
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89 | 8caa0065 | Jan Kiszka | { |
90 | 8caa0065 | Jan Kiszka | return t->config & HPET_TN_FSB_ENABLE;
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91 | 8caa0065 | Jan Kiszka | } |
92 | 8caa0065 | Jan Kiszka | |
93 | b7eaa6c7 | Jan Kiszka | static uint32_t hpet_enabled(HPETState *s)
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94 | 16b29ae1 | aliguori | { |
95 | b7eaa6c7 | Jan Kiszka | return s->config & HPET_CFG_ENABLE;
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96 | 16b29ae1 | aliguori | } |
97 | 16b29ae1 | aliguori | |
98 | 16b29ae1 | aliguori | static uint32_t timer_is_periodic(HPETTimer *t)
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99 | 16b29ae1 | aliguori | { |
100 | 16b29ae1 | aliguori | return t->config & HPET_TN_PERIODIC;
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101 | 16b29ae1 | aliguori | } |
102 | 16b29ae1 | aliguori | |
103 | 16b29ae1 | aliguori | static uint32_t timer_enabled(HPETTimer *t)
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104 | 16b29ae1 | aliguori | { |
105 | 16b29ae1 | aliguori | return t->config & HPET_TN_ENABLE;
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106 | 16b29ae1 | aliguori | } |
107 | 16b29ae1 | aliguori | |
108 | 16b29ae1 | aliguori | static uint32_t hpet_time_after(uint64_t a, uint64_t b)
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109 | 16b29ae1 | aliguori | { |
110 | 16b29ae1 | aliguori | return ((int32_t)(b) - (int32_t)(a) < 0); |
111 | 16b29ae1 | aliguori | } |
112 | 16b29ae1 | aliguori | |
113 | 16b29ae1 | aliguori | static uint32_t hpet_time_after64(uint64_t a, uint64_t b)
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114 | 16b29ae1 | aliguori | { |
115 | 16b29ae1 | aliguori | return ((int64_t)(b) - (int64_t)(a) < 0); |
116 | 16b29ae1 | aliguori | } |
117 | 16b29ae1 | aliguori | |
118 | c50c2d68 | aurel32 | static uint64_t ticks_to_ns(uint64_t value)
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119 | 16b29ae1 | aliguori | { |
120 | 16b29ae1 | aliguori | return (muldiv64(value, HPET_CLK_PERIOD, FS_PER_NS));
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121 | 16b29ae1 | aliguori | } |
122 | 16b29ae1 | aliguori | |
123 | c50c2d68 | aurel32 | static uint64_t ns_to_ticks(uint64_t value)
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124 | 16b29ae1 | aliguori | { |
125 | 16b29ae1 | aliguori | return (muldiv64(value, FS_PER_NS, HPET_CLK_PERIOD));
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126 | 16b29ae1 | aliguori | } |
127 | 16b29ae1 | aliguori | |
128 | 16b29ae1 | aliguori | static uint64_t hpet_fixup_reg(uint64_t new, uint64_t old, uint64_t mask)
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129 | 16b29ae1 | aliguori | { |
130 | 16b29ae1 | aliguori | new &= mask; |
131 | 16b29ae1 | aliguori | new |= old & ~mask; |
132 | 16b29ae1 | aliguori | return new;
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133 | 16b29ae1 | aliguori | } |
134 | 16b29ae1 | aliguori | |
135 | 16b29ae1 | aliguori | static int activating_bit(uint64_t old, uint64_t new, uint64_t mask) |
136 | 16b29ae1 | aliguori | { |
137 | c50c2d68 | aurel32 | return (!(old & mask) && (new & mask));
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138 | 16b29ae1 | aliguori | } |
139 | 16b29ae1 | aliguori | |
140 | 16b29ae1 | aliguori | static int deactivating_bit(uint64_t old, uint64_t new, uint64_t mask) |
141 | 16b29ae1 | aliguori | { |
142 | c50c2d68 | aurel32 | return ((old & mask) && !(new & mask));
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143 | 16b29ae1 | aliguori | } |
144 | 16b29ae1 | aliguori | |
145 | b7eaa6c7 | Jan Kiszka | static uint64_t hpet_get_ticks(HPETState *s)
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146 | 16b29ae1 | aliguori | { |
147 | 74475455 | Paolo Bonzini | return ns_to_ticks(qemu_get_clock_ns(vm_clock) + s->hpet_offset);
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148 | 16b29ae1 | aliguori | } |
149 | 16b29ae1 | aliguori | |
150 | c50c2d68 | aurel32 | /*
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151 | c50c2d68 | aurel32 | * calculate diff between comparator value and current ticks
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152 | 16b29ae1 | aliguori | */
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153 | 16b29ae1 | aliguori | static inline uint64_t hpet_calculate_diff(HPETTimer *t, uint64_t current) |
154 | 16b29ae1 | aliguori | { |
155 | c50c2d68 | aurel32 | |
156 | 16b29ae1 | aliguori | if (t->config & HPET_TN_32BIT) {
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157 | 16b29ae1 | aliguori | uint32_t diff, cmp; |
158 | 27bb0b2d | Jan Kiszka | |
159 | 16b29ae1 | aliguori | cmp = (uint32_t)t->cmp; |
160 | 16b29ae1 | aliguori | diff = cmp - (uint32_t)current; |
161 | 4f61927a | Max Filippov | diff = (int32_t)diff > 0 ? diff : (uint32_t)1; |
162 | 16b29ae1 | aliguori | return (uint64_t)diff;
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163 | 16b29ae1 | aliguori | } else {
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164 | 16b29ae1 | aliguori | uint64_t diff, cmp; |
165 | 27bb0b2d | Jan Kiszka | |
166 | 16b29ae1 | aliguori | cmp = t->cmp; |
167 | 16b29ae1 | aliguori | diff = cmp - current; |
168 | 4f61927a | Max Filippov | diff = (int64_t)diff > 0 ? diff : (uint64_t)1; |
169 | 16b29ae1 | aliguori | return diff;
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170 | 16b29ae1 | aliguori | } |
171 | 16b29ae1 | aliguori | } |
172 | 16b29ae1 | aliguori | |
173 | 22a9fe38 | Jan Kiszka | static void update_irq(struct HPETTimer *timer, int set) |
174 | 16b29ae1 | aliguori | { |
175 | 22a9fe38 | Jan Kiszka | uint64_t mask; |
176 | 22a9fe38 | Jan Kiszka | HPETState *s; |
177 | 16b29ae1 | aliguori | int route;
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178 | 16b29ae1 | aliguori | |
179 | 7d932dfd | Jan Kiszka | if (timer->tn <= 1 && hpet_in_legacy_mode(timer->state)) { |
180 | 16b29ae1 | aliguori | /* if LegacyReplacementRoute bit is set, HPET specification requires
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181 | 16b29ae1 | aliguori | * timer0 be routed to IRQ0 in NON-APIC or IRQ2 in the I/O APIC,
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182 | c50c2d68 | aurel32 | * timer1 be routed to IRQ8 in NON-APIC or IRQ8 in the I/O APIC.
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183 | 16b29ae1 | aliguori | */
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184 | 7d932dfd | Jan Kiszka | route = (timer->tn == 0) ? 0 : RTC_ISA_IRQ; |
185 | 16b29ae1 | aliguori | } else {
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186 | 27bb0b2d | Jan Kiszka | route = timer_int_route(timer); |
187 | 16b29ae1 | aliguori | } |
188 | 22a9fe38 | Jan Kiszka | s = timer->state; |
189 | 22a9fe38 | Jan Kiszka | mask = 1 << timer->tn;
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190 | 22a9fe38 | Jan Kiszka | if (!set || !timer_enabled(timer) || !hpet_enabled(timer->state)) {
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191 | 22a9fe38 | Jan Kiszka | s->isr &= ~mask; |
192 | 8caa0065 | Jan Kiszka | if (!timer_fsb_route(timer)) {
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193 | 8caa0065 | Jan Kiszka | qemu_irq_lower(s->irqs[route]); |
194 | 8caa0065 | Jan Kiszka | } |
195 | 8caa0065 | Jan Kiszka | } else if (timer_fsb_route(timer)) { |
196 | 8517263f | Alexander Graf | stl_le_phys(timer->fsb >> 32, timer->fsb & 0xffffffff); |
197 | 22a9fe38 | Jan Kiszka | } else if (timer->config & HPET_TN_TYPE_LEVEL) { |
198 | 22a9fe38 | Jan Kiszka | s->isr |= mask; |
199 | 22a9fe38 | Jan Kiszka | qemu_irq_raise(s->irqs[route]); |
200 | 22a9fe38 | Jan Kiszka | } else {
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201 | 22a9fe38 | Jan Kiszka | s->isr &= ~mask; |
202 | 22a9fe38 | Jan Kiszka | qemu_irq_pulse(s->irqs[route]); |
203 | 16b29ae1 | aliguori | } |
204 | 16b29ae1 | aliguori | } |
205 | 16b29ae1 | aliguori | |
206 | d4bfa4d7 | Juan Quintela | static void hpet_pre_save(void *opaque) |
207 | 16b29ae1 | aliguori | { |
208 | d4bfa4d7 | Juan Quintela | HPETState *s = opaque; |
209 | 27bb0b2d | Jan Kiszka | |
210 | 16b29ae1 | aliguori | /* save current counter value */
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211 | b7eaa6c7 | Jan Kiszka | s->hpet_counter = hpet_get_ticks(s); |
212 | 16b29ae1 | aliguori | } |
213 | 16b29ae1 | aliguori | |
214 | be4b44c5 | Jan Kiszka | static int hpet_pre_load(void *opaque) |
215 | be4b44c5 | Jan Kiszka | { |
216 | be4b44c5 | Jan Kiszka | HPETState *s = opaque; |
217 | be4b44c5 | Jan Kiszka | |
218 | be4b44c5 | Jan Kiszka | /* version 1 only supports 3, later versions will load the actual value */
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219 | be4b44c5 | Jan Kiszka | s->num_timers = HPET_MIN_TIMERS; |
220 | be4b44c5 | Jan Kiszka | return 0; |
221 | be4b44c5 | Jan Kiszka | } |
222 | be4b44c5 | Jan Kiszka | |
223 | e59fb374 | Juan Quintela | static int hpet_post_load(void *opaque, int version_id) |
224 | 16b29ae1 | aliguori | { |
225 | 16b29ae1 | aliguori | HPETState *s = opaque; |
226 | c50c2d68 | aurel32 | |
227 | 16b29ae1 | aliguori | /* Recalculate the offset between the main counter and guest time */
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228 | 74475455 | Paolo Bonzini | s->hpet_offset = ticks_to_ns(s->hpet_counter) - qemu_get_clock_ns(vm_clock); |
229 | be4b44c5 | Jan Kiszka | |
230 | be4b44c5 | Jan Kiszka | /* Push number of timers into capability returned via HPET_ID */
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231 | be4b44c5 | Jan Kiszka | s->capability &= ~HPET_ID_NUM_TIM_MASK; |
232 | be4b44c5 | Jan Kiszka | s->capability |= (s->num_timers - 1) << HPET_ID_NUM_TIM_SHIFT;
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233 | 40ac17cd | Gleb Natapov | hpet_cfg.hpet[s->hpet_id].event_timer_block_id = (uint32_t)s->capability; |
234 | 8caa0065 | Jan Kiszka | |
235 | 8caa0065 | Jan Kiszka | /* Derive HPET_MSI_SUPPORT from the capability of the first timer. */
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236 | 8caa0065 | Jan Kiszka | s->flags &= ~(1 << HPET_MSI_SUPPORT);
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237 | 8caa0065 | Jan Kiszka | if (s->timer[0].config & HPET_TN_FSB_CAP) { |
238 | 8caa0065 | Jan Kiszka | s->flags |= 1 << HPET_MSI_SUPPORT;
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239 | 8caa0065 | Jan Kiszka | } |
240 | 16b29ae1 | aliguori | return 0; |
241 | 16b29ae1 | aliguori | } |
242 | 16b29ae1 | aliguori | |
243 | e6cb4d45 | Juan Quintela | static const VMStateDescription vmstate_hpet_timer = { |
244 | e6cb4d45 | Juan Quintela | .name = "hpet_timer",
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245 | e6cb4d45 | Juan Quintela | .version_id = 1,
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246 | e6cb4d45 | Juan Quintela | .minimum_version_id = 1,
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247 | e6cb4d45 | Juan Quintela | .minimum_version_id_old = 1,
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248 | e6cb4d45 | Juan Quintela | .fields = (VMStateField []) { |
249 | e6cb4d45 | Juan Quintela | VMSTATE_UINT8(tn, HPETTimer), |
250 | e6cb4d45 | Juan Quintela | VMSTATE_UINT64(config, HPETTimer), |
251 | e6cb4d45 | Juan Quintela | VMSTATE_UINT64(cmp, HPETTimer), |
252 | e6cb4d45 | Juan Quintela | VMSTATE_UINT64(fsb, HPETTimer), |
253 | e6cb4d45 | Juan Quintela | VMSTATE_UINT64(period, HPETTimer), |
254 | e6cb4d45 | Juan Quintela | VMSTATE_UINT8(wrap_flag, HPETTimer), |
255 | e6cb4d45 | Juan Quintela | VMSTATE_TIMER(qemu_timer, HPETTimer), |
256 | e6cb4d45 | Juan Quintela | VMSTATE_END_OF_LIST() |
257 | e6cb4d45 | Juan Quintela | } |
258 | e6cb4d45 | Juan Quintela | }; |
259 | e6cb4d45 | Juan Quintela | |
260 | e6cb4d45 | Juan Quintela | static const VMStateDescription vmstate_hpet = { |
261 | e6cb4d45 | Juan Quintela | .name = "hpet",
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262 | be4b44c5 | Jan Kiszka | .version_id = 2,
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263 | e6cb4d45 | Juan Quintela | .minimum_version_id = 1,
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264 | e6cb4d45 | Juan Quintela | .minimum_version_id_old = 1,
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265 | e6cb4d45 | Juan Quintela | .pre_save = hpet_pre_save, |
266 | be4b44c5 | Jan Kiszka | .pre_load = hpet_pre_load, |
267 | e6cb4d45 | Juan Quintela | .post_load = hpet_post_load, |
268 | e6cb4d45 | Juan Quintela | .fields = (VMStateField []) { |
269 | e6cb4d45 | Juan Quintela | VMSTATE_UINT64(config, HPETState), |
270 | e6cb4d45 | Juan Quintela | VMSTATE_UINT64(isr, HPETState), |
271 | e6cb4d45 | Juan Quintela | VMSTATE_UINT64(hpet_counter, HPETState), |
272 | be4b44c5 | Jan Kiszka | VMSTATE_UINT8_V(num_timers, HPETState, 2),
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273 | be4b44c5 | Jan Kiszka | VMSTATE_STRUCT_VARRAY_UINT8(timer, HPETState, num_timers, 0,
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274 | be4b44c5 | Jan Kiszka | vmstate_hpet_timer, HPETTimer), |
275 | e6cb4d45 | Juan Quintela | VMSTATE_END_OF_LIST() |
276 | e6cb4d45 | Juan Quintela | } |
277 | e6cb4d45 | Juan Quintela | }; |
278 | e6cb4d45 | Juan Quintela | |
279 | c50c2d68 | aurel32 | /*
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280 | 16b29ae1 | aliguori | * timer expiration callback
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281 | 16b29ae1 | aliguori | */
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282 | 16b29ae1 | aliguori | static void hpet_timer(void *opaque) |
283 | 16b29ae1 | aliguori | { |
284 | 27bb0b2d | Jan Kiszka | HPETTimer *t = opaque; |
285 | 16b29ae1 | aliguori | uint64_t diff; |
286 | 16b29ae1 | aliguori | |
287 | 16b29ae1 | aliguori | uint64_t period = t->period; |
288 | b7eaa6c7 | Jan Kiszka | uint64_t cur_tick = hpet_get_ticks(t->state); |
289 | 16b29ae1 | aliguori | |
290 | 16b29ae1 | aliguori | if (timer_is_periodic(t) && period != 0) { |
291 | 16b29ae1 | aliguori | if (t->config & HPET_TN_32BIT) {
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292 | 27bb0b2d | Jan Kiszka | while (hpet_time_after(cur_tick, t->cmp)) {
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293 | 16b29ae1 | aliguori | t->cmp = (uint32_t)(t->cmp + t->period); |
294 | 27bb0b2d | Jan Kiszka | } |
295 | 27bb0b2d | Jan Kiszka | } else {
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296 | 27bb0b2d | Jan Kiszka | while (hpet_time_after64(cur_tick, t->cmp)) {
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297 | 16b29ae1 | aliguori | t->cmp += period; |
298 | 27bb0b2d | Jan Kiszka | } |
299 | 27bb0b2d | Jan Kiszka | } |
300 | 16b29ae1 | aliguori | diff = hpet_calculate_diff(t, cur_tick); |
301 | 27bb0b2d | Jan Kiszka | qemu_mod_timer(t->qemu_timer, |
302 | 74475455 | Paolo Bonzini | qemu_get_clock_ns(vm_clock) + (int64_t)ticks_to_ns(diff)); |
303 | 16b29ae1 | aliguori | } else if (t->config & HPET_TN_32BIT && !timer_is_periodic(t)) { |
304 | 16b29ae1 | aliguori | if (t->wrap_flag) {
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305 | 16b29ae1 | aliguori | diff = hpet_calculate_diff(t, cur_tick); |
306 | 74475455 | Paolo Bonzini | qemu_mod_timer(t->qemu_timer, qemu_get_clock_ns(vm_clock) + |
307 | 27bb0b2d | Jan Kiszka | (int64_t)ticks_to_ns(diff)); |
308 | 16b29ae1 | aliguori | t->wrap_flag = 0;
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309 | 16b29ae1 | aliguori | } |
310 | 16b29ae1 | aliguori | } |
311 | 22a9fe38 | Jan Kiszka | update_irq(t, 1);
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312 | 16b29ae1 | aliguori | } |
313 | 16b29ae1 | aliguori | |
314 | 16b29ae1 | aliguori | static void hpet_set_timer(HPETTimer *t) |
315 | 16b29ae1 | aliguori | { |
316 | 16b29ae1 | aliguori | uint64_t diff; |
317 | 16b29ae1 | aliguori | uint32_t wrap_diff; /* how many ticks until we wrap? */
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318 | b7eaa6c7 | Jan Kiszka | uint64_t cur_tick = hpet_get_ticks(t->state); |
319 | c50c2d68 | aurel32 | |
320 | 16b29ae1 | aliguori | /* whenever new timer is being set up, make sure wrap_flag is 0 */
|
321 | 16b29ae1 | aliguori | t->wrap_flag = 0;
|
322 | 16b29ae1 | aliguori | diff = hpet_calculate_diff(t, cur_tick); |
323 | 16b29ae1 | aliguori | |
324 | c50c2d68 | aurel32 | /* hpet spec says in one-shot 32-bit mode, generate an interrupt when
|
325 | 16b29ae1 | aliguori | * counter wraps in addition to an interrupt with comparator match.
|
326 | c50c2d68 | aurel32 | */
|
327 | 16b29ae1 | aliguori | if (t->config & HPET_TN_32BIT && !timer_is_periodic(t)) {
|
328 | 16b29ae1 | aliguori | wrap_diff = 0xffffffff - (uint32_t)cur_tick;
|
329 | 16b29ae1 | aliguori | if (wrap_diff < (uint32_t)diff) {
|
330 | 16b29ae1 | aliguori | diff = wrap_diff; |
331 | c50c2d68 | aurel32 | t->wrap_flag = 1;
|
332 | 16b29ae1 | aliguori | } |
333 | 16b29ae1 | aliguori | } |
334 | 27bb0b2d | Jan Kiszka | qemu_mod_timer(t->qemu_timer, |
335 | 74475455 | Paolo Bonzini | qemu_get_clock_ns(vm_clock) + (int64_t)ticks_to_ns(diff)); |
336 | 16b29ae1 | aliguori | } |
337 | 16b29ae1 | aliguori | |
338 | 16b29ae1 | aliguori | static void hpet_del_timer(HPETTimer *t) |
339 | 16b29ae1 | aliguori | { |
340 | 16b29ae1 | aliguori | qemu_del_timer(t->qemu_timer); |
341 | 22a9fe38 | Jan Kiszka | update_irq(t, 0);
|
342 | 16b29ae1 | aliguori | } |
343 | 16b29ae1 | aliguori | |
344 | 16b29ae1 | aliguori | #ifdef HPET_DEBUG
|
345 | c227f099 | Anthony Liguori | static uint32_t hpet_ram_readb(void *opaque, target_phys_addr_t addr) |
346 | 16b29ae1 | aliguori | { |
347 | 16b29ae1 | aliguori | printf("qemu: hpet_read b at %" PRIx64 "\n", addr); |
348 | 16b29ae1 | aliguori | return 0; |
349 | 16b29ae1 | aliguori | } |
350 | 16b29ae1 | aliguori | |
351 | c227f099 | Anthony Liguori | static uint32_t hpet_ram_readw(void *opaque, target_phys_addr_t addr) |
352 | 16b29ae1 | aliguori | { |
353 | 16b29ae1 | aliguori | printf("qemu: hpet_read w at %" PRIx64 "\n", addr); |
354 | 16b29ae1 | aliguori | return 0; |
355 | 16b29ae1 | aliguori | } |
356 | 16b29ae1 | aliguori | #endif
|
357 | 16b29ae1 | aliguori | |
358 | e977aa37 | Avi Kivity | static uint64_t hpet_ram_read(void *opaque, target_phys_addr_t addr, |
359 | e977aa37 | Avi Kivity | unsigned size)
|
360 | 16b29ae1 | aliguori | { |
361 | 27bb0b2d | Jan Kiszka | HPETState *s = opaque; |
362 | 16b29ae1 | aliguori | uint64_t cur_tick, index; |
363 | 16b29ae1 | aliguori | |
364 | d0f2c4c6 | malc | DPRINTF("qemu: Enter hpet_ram_readl at %" PRIx64 "\n", addr); |
365 | 16b29ae1 | aliguori | index = addr; |
366 | 16b29ae1 | aliguori | /*address range of all TN regs*/
|
367 | 16b29ae1 | aliguori | if (index >= 0x100 && index <= 0x3ff) { |
368 | 16b29ae1 | aliguori | uint8_t timer_id = (addr - 0x100) / 0x20; |
369 | 27bb0b2d | Jan Kiszka | HPETTimer *timer = &s->timer[timer_id]; |
370 | 27bb0b2d | Jan Kiszka | |
371 | be4b44c5 | Jan Kiszka | if (timer_id > s->num_timers) {
|
372 | 6982d664 | Jan Kiszka | DPRINTF("qemu: timer id out of range\n");
|
373 | 16b29ae1 | aliguori | return 0; |
374 | 16b29ae1 | aliguori | } |
375 | 16b29ae1 | aliguori | |
376 | 16b29ae1 | aliguori | switch ((addr - 0x100) % 0x20) { |
377 | 27bb0b2d | Jan Kiszka | case HPET_TN_CFG:
|
378 | 27bb0b2d | Jan Kiszka | return timer->config;
|
379 | 27bb0b2d | Jan Kiszka | case HPET_TN_CFG + 4: // Interrupt capabilities |
380 | 27bb0b2d | Jan Kiszka | return timer->config >> 32; |
381 | 27bb0b2d | Jan Kiszka | case HPET_TN_CMP: // comparator register |
382 | 27bb0b2d | Jan Kiszka | return timer->cmp;
|
383 | 27bb0b2d | Jan Kiszka | case HPET_TN_CMP + 4: |
384 | 27bb0b2d | Jan Kiszka | return timer->cmp >> 32; |
385 | 27bb0b2d | Jan Kiszka | case HPET_TN_ROUTE:
|
386 | 8caa0065 | Jan Kiszka | return timer->fsb;
|
387 | 8caa0065 | Jan Kiszka | case HPET_TN_ROUTE + 4: |
388 | 27bb0b2d | Jan Kiszka | return timer->fsb >> 32; |
389 | 27bb0b2d | Jan Kiszka | default:
|
390 | 27bb0b2d | Jan Kiszka | DPRINTF("qemu: invalid hpet_ram_readl\n");
|
391 | 27bb0b2d | Jan Kiszka | break;
|
392 | 16b29ae1 | aliguori | } |
393 | 16b29ae1 | aliguori | } else {
|
394 | 16b29ae1 | aliguori | switch (index) {
|
395 | 27bb0b2d | Jan Kiszka | case HPET_ID:
|
396 | 27bb0b2d | Jan Kiszka | return s->capability;
|
397 | 27bb0b2d | Jan Kiszka | case HPET_PERIOD:
|
398 | 27bb0b2d | Jan Kiszka | return s->capability >> 32; |
399 | 27bb0b2d | Jan Kiszka | case HPET_CFG:
|
400 | 27bb0b2d | Jan Kiszka | return s->config;
|
401 | 27bb0b2d | Jan Kiszka | case HPET_CFG + 4: |
402 | b2bedb21 | Stefan Weil | DPRINTF("qemu: invalid HPET_CFG + 4 hpet_ram_readl\n");
|
403 | 27bb0b2d | Jan Kiszka | return 0; |
404 | 27bb0b2d | Jan Kiszka | case HPET_COUNTER:
|
405 | b7eaa6c7 | Jan Kiszka | if (hpet_enabled(s)) {
|
406 | b7eaa6c7 | Jan Kiszka | cur_tick = hpet_get_ticks(s); |
407 | 27bb0b2d | Jan Kiszka | } else {
|
408 | 27bb0b2d | Jan Kiszka | cur_tick = s->hpet_counter; |
409 | 27bb0b2d | Jan Kiszka | } |
410 | 27bb0b2d | Jan Kiszka | DPRINTF("qemu: reading counter = %" PRIx64 "\n", cur_tick); |
411 | 27bb0b2d | Jan Kiszka | return cur_tick;
|
412 | 27bb0b2d | Jan Kiszka | case HPET_COUNTER + 4: |
413 | b7eaa6c7 | Jan Kiszka | if (hpet_enabled(s)) {
|
414 | b7eaa6c7 | Jan Kiszka | cur_tick = hpet_get_ticks(s); |
415 | 27bb0b2d | Jan Kiszka | } else {
|
416 | 27bb0b2d | Jan Kiszka | cur_tick = s->hpet_counter; |
417 | 27bb0b2d | Jan Kiszka | } |
418 | 27bb0b2d | Jan Kiszka | DPRINTF("qemu: reading counter + 4 = %" PRIx64 "\n", cur_tick); |
419 | 27bb0b2d | Jan Kiszka | return cur_tick >> 32; |
420 | 27bb0b2d | Jan Kiszka | case HPET_STATUS:
|
421 | 27bb0b2d | Jan Kiszka | return s->isr;
|
422 | 27bb0b2d | Jan Kiszka | default:
|
423 | 27bb0b2d | Jan Kiszka | DPRINTF("qemu: invalid hpet_ram_readl\n");
|
424 | 27bb0b2d | Jan Kiszka | break;
|
425 | 16b29ae1 | aliguori | } |
426 | 16b29ae1 | aliguori | } |
427 | 16b29ae1 | aliguori | return 0; |
428 | 16b29ae1 | aliguori | } |
429 | 16b29ae1 | aliguori | |
430 | e977aa37 | Avi Kivity | static void hpet_ram_write(void *opaque, target_phys_addr_t addr, |
431 | e977aa37 | Avi Kivity | uint64_t value, unsigned size)
|
432 | 16b29ae1 | aliguori | { |
433 | 16b29ae1 | aliguori | int i;
|
434 | 27bb0b2d | Jan Kiszka | HPETState *s = opaque; |
435 | ce536cfd | Beth Kon | uint64_t old_val, new_val, val, index; |
436 | 16b29ae1 | aliguori | |
437 | d0f2c4c6 | malc | DPRINTF("qemu: Enter hpet_ram_writel at %" PRIx64 " = %#x\n", addr, value); |
438 | 16b29ae1 | aliguori | index = addr; |
439 | e977aa37 | Avi Kivity | old_val = hpet_ram_read(opaque, addr, 4);
|
440 | 16b29ae1 | aliguori | new_val = value; |
441 | 16b29ae1 | aliguori | |
442 | 16b29ae1 | aliguori | /*address range of all TN regs*/
|
443 | 16b29ae1 | aliguori | if (index >= 0x100 && index <= 0x3ff) { |
444 | 16b29ae1 | aliguori | uint8_t timer_id = (addr - 0x100) / 0x20; |
445 | 16b29ae1 | aliguori | HPETTimer *timer = &s->timer[timer_id]; |
446 | c50c2d68 | aurel32 | |
447 | b2bedb21 | Stefan Weil | DPRINTF("qemu: hpet_ram_writel timer_id = %#x\n", timer_id);
|
448 | be4b44c5 | Jan Kiszka | if (timer_id > s->num_timers) {
|
449 | 6982d664 | Jan Kiszka | DPRINTF("qemu: timer id out of range\n");
|
450 | 6982d664 | Jan Kiszka | return;
|
451 | 6982d664 | Jan Kiszka | } |
452 | 16b29ae1 | aliguori | switch ((addr - 0x100) % 0x20) { |
453 | 27bb0b2d | Jan Kiszka | case HPET_TN_CFG:
|
454 | 27bb0b2d | Jan Kiszka | DPRINTF("qemu: hpet_ram_writel HPET_TN_CFG\n");
|
455 | 8caa0065 | Jan Kiszka | if (activating_bit(old_val, new_val, HPET_TN_FSB_ENABLE)) {
|
456 | 8caa0065 | Jan Kiszka | update_irq(timer, 0);
|
457 | 8caa0065 | Jan Kiszka | } |
458 | 27bb0b2d | Jan Kiszka | val = hpet_fixup_reg(new_val, old_val, HPET_TN_CFG_WRITE_MASK); |
459 | 27bb0b2d | Jan Kiszka | timer->config = (timer->config & 0xffffffff00000000ULL) | val;
|
460 | 27bb0b2d | Jan Kiszka | if (new_val & HPET_TN_32BIT) {
|
461 | 27bb0b2d | Jan Kiszka | timer->cmp = (uint32_t)timer->cmp; |
462 | 27bb0b2d | Jan Kiszka | timer->period = (uint32_t)timer->period; |
463 | 27bb0b2d | Jan Kiszka | } |
464 | 9cec89e8 | Jan Kiszka | if (activating_bit(old_val, new_val, HPET_TN_ENABLE)) {
|
465 | 9cec89e8 | Jan Kiszka | hpet_set_timer(timer); |
466 | 9cec89e8 | Jan Kiszka | } else if (deactivating_bit(old_val, new_val, HPET_TN_ENABLE)) { |
467 | 9cec89e8 | Jan Kiszka | hpet_del_timer(timer); |
468 | 9cec89e8 | Jan Kiszka | } |
469 | 27bb0b2d | Jan Kiszka | break;
|
470 | 27bb0b2d | Jan Kiszka | case HPET_TN_CFG + 4: // Interrupt capabilities |
471 | 27bb0b2d | Jan Kiszka | DPRINTF("qemu: invalid HPET_TN_CFG+4 write\n");
|
472 | 27bb0b2d | Jan Kiszka | break;
|
473 | 27bb0b2d | Jan Kiszka | case HPET_TN_CMP: // comparator register |
474 | b2bedb21 | Stefan Weil | DPRINTF("qemu: hpet_ram_writel HPET_TN_CMP\n");
|
475 | 27bb0b2d | Jan Kiszka | if (timer->config & HPET_TN_32BIT) {
|
476 | 27bb0b2d | Jan Kiszka | new_val = (uint32_t)new_val; |
477 | 27bb0b2d | Jan Kiszka | } |
478 | 27bb0b2d | Jan Kiszka | if (!timer_is_periodic(timer)
|
479 | 27bb0b2d | Jan Kiszka | || (timer->config & HPET_TN_SETVAL)) { |
480 | 27bb0b2d | Jan Kiszka | timer->cmp = (timer->cmp & 0xffffffff00000000ULL) | new_val;
|
481 | 27bb0b2d | Jan Kiszka | } |
482 | 27bb0b2d | Jan Kiszka | if (timer_is_periodic(timer)) {
|
483 | 27bb0b2d | Jan Kiszka | /*
|
484 | 27bb0b2d | Jan Kiszka | * FIXME: Clamp period to reasonable min value?
|
485 | 27bb0b2d | Jan Kiszka | * Clamp period to reasonable max value
|
486 | 27bb0b2d | Jan Kiszka | */
|
487 | 27bb0b2d | Jan Kiszka | new_val &= (timer->config & HPET_TN_32BIT ? ~0u : ~0ull) >> 1; |
488 | 27bb0b2d | Jan Kiszka | timer->period = |
489 | 27bb0b2d | Jan Kiszka | (timer->period & 0xffffffff00000000ULL) | new_val;
|
490 | 27bb0b2d | Jan Kiszka | } |
491 | 27bb0b2d | Jan Kiszka | timer->config &= ~HPET_TN_SETVAL; |
492 | b7eaa6c7 | Jan Kiszka | if (hpet_enabled(s)) {
|
493 | 27bb0b2d | Jan Kiszka | hpet_set_timer(timer); |
494 | 27bb0b2d | Jan Kiszka | } |
495 | 27bb0b2d | Jan Kiszka | break;
|
496 | 27bb0b2d | Jan Kiszka | case HPET_TN_CMP + 4: // comparator register high order |
497 | 27bb0b2d | Jan Kiszka | DPRINTF("qemu: hpet_ram_writel HPET_TN_CMP + 4\n");
|
498 | 27bb0b2d | Jan Kiszka | if (!timer_is_periodic(timer)
|
499 | 27bb0b2d | Jan Kiszka | || (timer->config & HPET_TN_SETVAL)) { |
500 | 27bb0b2d | Jan Kiszka | timer->cmp = (timer->cmp & 0xffffffffULL) | new_val << 32; |
501 | 27bb0b2d | Jan Kiszka | } else {
|
502 | 27bb0b2d | Jan Kiszka | /*
|
503 | 27bb0b2d | Jan Kiszka | * FIXME: Clamp period to reasonable min value?
|
504 | 27bb0b2d | Jan Kiszka | * Clamp period to reasonable max value
|
505 | 27bb0b2d | Jan Kiszka | */
|
506 | 27bb0b2d | Jan Kiszka | new_val &= (timer->config & HPET_TN_32BIT ? ~0u : ~0ull) >> 1; |
507 | 27bb0b2d | Jan Kiszka | timer->period = |
508 | 27bb0b2d | Jan Kiszka | (timer->period & 0xffffffffULL) | new_val << 32; |
509 | 16b29ae1 | aliguori | } |
510 | 16b29ae1 | aliguori | timer->config &= ~HPET_TN_SETVAL; |
511 | b7eaa6c7 | Jan Kiszka | if (hpet_enabled(s)) {
|
512 | 16b29ae1 | aliguori | hpet_set_timer(timer); |
513 | 16b29ae1 | aliguori | } |
514 | 16b29ae1 | aliguori | break;
|
515 | 8caa0065 | Jan Kiszka | case HPET_TN_ROUTE:
|
516 | 8caa0065 | Jan Kiszka | timer->fsb = (timer->fsb & 0xffffffff00000000ULL) | new_val;
|
517 | 8caa0065 | Jan Kiszka | break;
|
518 | 27bb0b2d | Jan Kiszka | case HPET_TN_ROUTE + 4: |
519 | 8caa0065 | Jan Kiszka | timer->fsb = (new_val << 32) | (timer->fsb & 0xffffffff); |
520 | 27bb0b2d | Jan Kiszka | break;
|
521 | 27bb0b2d | Jan Kiszka | default:
|
522 | 27bb0b2d | Jan Kiszka | DPRINTF("qemu: invalid hpet_ram_writel\n");
|
523 | 27bb0b2d | Jan Kiszka | break;
|
524 | 16b29ae1 | aliguori | } |
525 | 16b29ae1 | aliguori | return;
|
526 | 16b29ae1 | aliguori | } else {
|
527 | 16b29ae1 | aliguori | switch (index) {
|
528 | 27bb0b2d | Jan Kiszka | case HPET_ID:
|
529 | 27bb0b2d | Jan Kiszka | return;
|
530 | 27bb0b2d | Jan Kiszka | case HPET_CFG:
|
531 | 27bb0b2d | Jan Kiszka | val = hpet_fixup_reg(new_val, old_val, HPET_CFG_WRITE_MASK); |
532 | 27bb0b2d | Jan Kiszka | s->config = (s->config & 0xffffffff00000000ULL) | val;
|
533 | 27bb0b2d | Jan Kiszka | if (activating_bit(old_val, new_val, HPET_CFG_ENABLE)) {
|
534 | 27bb0b2d | Jan Kiszka | /* Enable main counter and interrupt generation. */
|
535 | 27bb0b2d | Jan Kiszka | s->hpet_offset = |
536 | 74475455 | Paolo Bonzini | ticks_to_ns(s->hpet_counter) - qemu_get_clock_ns(vm_clock); |
537 | be4b44c5 | Jan Kiszka | for (i = 0; i < s->num_timers; i++) { |
538 | 27bb0b2d | Jan Kiszka | if ((&s->timer[i])->cmp != ~0ULL) { |
539 | 27bb0b2d | Jan Kiszka | hpet_set_timer(&s->timer[i]); |
540 | 27bb0b2d | Jan Kiszka | } |
541 | 16b29ae1 | aliguori | } |
542 | 27bb0b2d | Jan Kiszka | } else if (deactivating_bit(old_val, new_val, HPET_CFG_ENABLE)) { |
543 | 27bb0b2d | Jan Kiszka | /* Halt main counter and disable interrupt generation. */
|
544 | b7eaa6c7 | Jan Kiszka | s->hpet_counter = hpet_get_ticks(s); |
545 | be4b44c5 | Jan Kiszka | for (i = 0; i < s->num_timers; i++) { |
546 | 27bb0b2d | Jan Kiszka | hpet_del_timer(&s->timer[i]); |
547 | 16b29ae1 | aliguori | } |
548 | 27bb0b2d | Jan Kiszka | } |
549 | 27bb0b2d | Jan Kiszka | /* i8254 and RTC are disabled when HPET is in legacy mode */
|
550 | 27bb0b2d | Jan Kiszka | if (activating_bit(old_val, new_val, HPET_CFG_LEGACY)) {
|
551 | 27bb0b2d | Jan Kiszka | hpet_pit_disable(); |
552 | 7d932dfd | Jan Kiszka | qemu_irq_lower(s->irqs[RTC_ISA_IRQ]); |
553 | 27bb0b2d | Jan Kiszka | } else if (deactivating_bit(old_val, new_val, HPET_CFG_LEGACY)) { |
554 | 27bb0b2d | Jan Kiszka | hpet_pit_enable(); |
555 | 7d932dfd | Jan Kiszka | qemu_set_irq(s->irqs[RTC_ISA_IRQ], s->rtc_irq_level); |
556 | 27bb0b2d | Jan Kiszka | } |
557 | 27bb0b2d | Jan Kiszka | break;
|
558 | 27bb0b2d | Jan Kiszka | case HPET_CFG + 4: |
559 | b2bedb21 | Stefan Weil | DPRINTF("qemu: invalid HPET_CFG+4 write\n");
|
560 | 27bb0b2d | Jan Kiszka | break;
|
561 | 27bb0b2d | Jan Kiszka | case HPET_STATUS:
|
562 | 22a9fe38 | Jan Kiszka | val = new_val & s->isr; |
563 | be4b44c5 | Jan Kiszka | for (i = 0; i < s->num_timers; i++) { |
564 | 22a9fe38 | Jan Kiszka | if (val & (1 << i)) { |
565 | 22a9fe38 | Jan Kiszka | update_irq(&s->timer[i], 0);
|
566 | 22a9fe38 | Jan Kiszka | } |
567 | 22a9fe38 | Jan Kiszka | } |
568 | 27bb0b2d | Jan Kiszka | break;
|
569 | 27bb0b2d | Jan Kiszka | case HPET_COUNTER:
|
570 | b7eaa6c7 | Jan Kiszka | if (hpet_enabled(s)) {
|
571 | ad0a6551 | Jan Kiszka | DPRINTF("qemu: Writing counter while HPET enabled!\n");
|
572 | 27bb0b2d | Jan Kiszka | } |
573 | 27bb0b2d | Jan Kiszka | s->hpet_counter = |
574 | 27bb0b2d | Jan Kiszka | (s->hpet_counter & 0xffffffff00000000ULL) | value;
|
575 | 27bb0b2d | Jan Kiszka | DPRINTF("qemu: HPET counter written. ctr = %#x -> %" PRIx64 "\n", |
576 | 27bb0b2d | Jan Kiszka | value, s->hpet_counter); |
577 | 27bb0b2d | Jan Kiszka | break;
|
578 | 27bb0b2d | Jan Kiszka | case HPET_COUNTER + 4: |
579 | b7eaa6c7 | Jan Kiszka | if (hpet_enabled(s)) {
|
580 | ad0a6551 | Jan Kiszka | DPRINTF("qemu: Writing counter while HPET enabled!\n");
|
581 | 27bb0b2d | Jan Kiszka | } |
582 | 27bb0b2d | Jan Kiszka | s->hpet_counter = |
583 | 27bb0b2d | Jan Kiszka | (s->hpet_counter & 0xffffffffULL) | (((uint64_t)value) << 32); |
584 | 27bb0b2d | Jan Kiszka | DPRINTF("qemu: HPET counter + 4 written. ctr = %#x -> %" PRIx64 "\n", |
585 | 27bb0b2d | Jan Kiszka | value, s->hpet_counter); |
586 | 27bb0b2d | Jan Kiszka | break;
|
587 | 27bb0b2d | Jan Kiszka | default:
|
588 | 27bb0b2d | Jan Kiszka | DPRINTF("qemu: invalid hpet_ram_writel\n");
|
589 | 27bb0b2d | Jan Kiszka | break;
|
590 | 16b29ae1 | aliguori | } |
591 | 16b29ae1 | aliguori | } |
592 | 16b29ae1 | aliguori | } |
593 | 16b29ae1 | aliguori | |
594 | e977aa37 | Avi Kivity | static const MemoryRegionOps hpet_ram_ops = { |
595 | e977aa37 | Avi Kivity | .read = hpet_ram_read, |
596 | e977aa37 | Avi Kivity | .write = hpet_ram_write, |
597 | e977aa37 | Avi Kivity | .valid = { |
598 | e977aa37 | Avi Kivity | .min_access_size = 4,
|
599 | e977aa37 | Avi Kivity | .max_access_size = 4,
|
600 | e977aa37 | Avi Kivity | }, |
601 | e977aa37 | Avi Kivity | .endianness = DEVICE_NATIVE_ENDIAN, |
602 | 16b29ae1 | aliguori | }; |
603 | 16b29ae1 | aliguori | |
604 | 822557eb | Jan Kiszka | static void hpet_reset(DeviceState *d) |
605 | 27bb0b2d | Jan Kiszka | { |
606 | 822557eb | Jan Kiszka | HPETState *s = FROM_SYSBUS(HPETState, sysbus_from_qdev(d)); |
607 | 16b29ae1 | aliguori | int i;
|
608 | 16b29ae1 | aliguori | static int count = 0; |
609 | 16b29ae1 | aliguori | |
610 | be4b44c5 | Jan Kiszka | for (i = 0; i < s->num_timers; i++) { |
611 | 16b29ae1 | aliguori | HPETTimer *timer = &s->timer[i]; |
612 | 27bb0b2d | Jan Kiszka | |
613 | 16b29ae1 | aliguori | hpet_del_timer(timer); |
614 | 16b29ae1 | aliguori | timer->cmp = ~0ULL;
|
615 | 8caa0065 | Jan Kiszka | timer->config = HPET_TN_PERIODIC_CAP | HPET_TN_SIZE_CAP; |
616 | 8caa0065 | Jan Kiszka | if (s->flags & (1 << HPET_MSI_SUPPORT)) { |
617 | 8caa0065 | Jan Kiszka | timer->config |= HPET_TN_FSB_CAP; |
618 | 8caa0065 | Jan Kiszka | } |
619 | ce536cfd | Beth Kon | /* advertise availability of ioapic inti2 */
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620 | ce536cfd | Beth Kon | timer->config |= 0x00000004ULL << 32; |
621 | 16b29ae1 | aliguori | timer->period = 0ULL;
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622 | 16b29ae1 | aliguori | timer->wrap_flag = 0;
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623 | 16b29ae1 | aliguori | } |
624 | 16b29ae1 | aliguori | |
625 | 16b29ae1 | aliguori | s->hpet_counter = 0ULL;
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626 | 16b29ae1 | aliguori | s->hpet_offset = 0ULL;
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627 | 7d93b1fa | Beth Kon | s->config = 0ULL;
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628 | 27bb0b2d | Jan Kiszka | if (count > 0) { |
629 | c50c2d68 | aurel32 | /* we don't enable pit when hpet_reset is first called (by hpet_init)
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630 | 16b29ae1 | aliguori | * because hpet is taking over for pit here. On subsequent invocations,
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631 | 16b29ae1 | aliguori | * hpet_reset is called due to system reset. At this point control must
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632 | c50c2d68 | aurel32 | * be returned to pit until SW reenables hpet.
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633 | 16b29ae1 | aliguori | */
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634 | 16b29ae1 | aliguori | hpet_pit_enable(); |
635 | 27bb0b2d | Jan Kiszka | } |
636 | 40ac17cd | Gleb Natapov | hpet_cfg.hpet[s->hpet_id].event_timer_block_id = (uint32_t)s->capability; |
637 | 40ac17cd | Gleb Natapov | hpet_cfg.hpet[s->hpet_id].address = sysbus_from_qdev(d)->mmio[0].addr;
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638 | 16b29ae1 | aliguori | count = 1;
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639 | 16b29ae1 | aliguori | } |
640 | 16b29ae1 | aliguori | |
641 | 7d932dfd | Jan Kiszka | static void hpet_handle_rtc_irq(void *opaque, int n, int level) |
642 | 7d932dfd | Jan Kiszka | { |
643 | 7d932dfd | Jan Kiszka | HPETState *s = FROM_SYSBUS(HPETState, opaque); |
644 | 7d932dfd | Jan Kiszka | |
645 | 7d932dfd | Jan Kiszka | s->rtc_irq_level = level; |
646 | 7d932dfd | Jan Kiszka | if (!hpet_in_legacy_mode(s)) {
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647 | 7d932dfd | Jan Kiszka | qemu_set_irq(s->irqs[RTC_ISA_IRQ], level); |
648 | 7d932dfd | Jan Kiszka | } |
649 | 7d932dfd | Jan Kiszka | } |
650 | 7d932dfd | Jan Kiszka | |
651 | 822557eb | Jan Kiszka | static int hpet_init(SysBusDevice *dev) |
652 | 27bb0b2d | Jan Kiszka | { |
653 | 822557eb | Jan Kiszka | HPETState *s = FROM_SYSBUS(HPETState, dev); |
654 | e977aa37 | Avi Kivity | int i;
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655 | 27bb0b2d | Jan Kiszka | HPETTimer *timer; |
656 | 16b29ae1 | aliguori | |
657 | d2c5efd8 | Stefan Weil | if (hpet_cfg.count == UINT8_MAX) {
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658 | d2c5efd8 | Stefan Weil | /* first instance */
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659 | 40ac17cd | Gleb Natapov | hpet_cfg.count = 0;
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660 | d2c5efd8 | Stefan Weil | } |
661 | 40ac17cd | Gleb Natapov | |
662 | 40ac17cd | Gleb Natapov | if (hpet_cfg.count == 8) { |
663 | 40ac17cd | Gleb Natapov | fprintf(stderr, "Only 8 instances of HPET is allowed\n");
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664 | 40ac17cd | Gleb Natapov | return -1; |
665 | 40ac17cd | Gleb Natapov | } |
666 | 40ac17cd | Gleb Natapov | |
667 | 40ac17cd | Gleb Natapov | s->hpet_id = hpet_cfg.count++; |
668 | 40ac17cd | Gleb Natapov | |
669 | 822557eb | Jan Kiszka | for (i = 0; i < HPET_NUM_IRQ_ROUTES; i++) { |
670 | 822557eb | Jan Kiszka | sysbus_init_irq(dev, &s->irqs[i]); |
671 | 822557eb | Jan Kiszka | } |
672 | be4b44c5 | Jan Kiszka | |
673 | be4b44c5 | Jan Kiszka | if (s->num_timers < HPET_MIN_TIMERS) {
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674 | be4b44c5 | Jan Kiszka | s->num_timers = HPET_MIN_TIMERS; |
675 | be4b44c5 | Jan Kiszka | } else if (s->num_timers > HPET_MAX_TIMERS) { |
676 | be4b44c5 | Jan Kiszka | s->num_timers = HPET_MAX_TIMERS; |
677 | be4b44c5 | Jan Kiszka | } |
678 | be4b44c5 | Jan Kiszka | for (i = 0; i < HPET_MAX_TIMERS; i++) { |
679 | 27bb0b2d | Jan Kiszka | timer = &s->timer[i]; |
680 | 74475455 | Paolo Bonzini | timer->qemu_timer = qemu_new_timer_ns(vm_clock, hpet_timer, timer); |
681 | 7afbecc9 | Jan Kiszka | timer->tn = i; |
682 | 7afbecc9 | Jan Kiszka | timer->state = s; |
683 | 16b29ae1 | aliguori | } |
684 | 822557eb | Jan Kiszka | |
685 | 072c2c31 | Jan Kiszka | /* 64-bit main counter; LegacyReplacementRoute. */
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686 | 072c2c31 | Jan Kiszka | s->capability = 0x8086a001ULL;
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687 | 072c2c31 | Jan Kiszka | s->capability |= (s->num_timers - 1) << HPET_ID_NUM_TIM_SHIFT;
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688 | 072c2c31 | Jan Kiszka | s->capability |= ((HPET_CLK_PERIOD) << 32);
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689 | 072c2c31 | Jan Kiszka | |
690 | 7d932dfd | Jan Kiszka | qdev_init_gpio_in(&dev->qdev, hpet_handle_rtc_irq, 1);
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691 | 7d932dfd | Jan Kiszka | |
692 | 16b29ae1 | aliguori | /* HPET Area */
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693 | e977aa37 | Avi Kivity | memory_region_init_io(&s->iomem, &hpet_ram_ops, s, "hpet", 0x400); |
694 | 750ecd44 | Avi Kivity | sysbus_init_mmio(dev, &s->iomem); |
695 | 822557eb | Jan Kiszka | return 0; |
696 | 16b29ae1 | aliguori | } |
697 | 822557eb | Jan Kiszka | |
698 | 999e12bb | Anthony Liguori | static Property hpet_device_properties[] = {
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699 | 999e12bb | Anthony Liguori | DEFINE_PROP_UINT8("timers", HPETState, num_timers, HPET_MIN_TIMERS),
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700 | 999e12bb | Anthony Liguori | DEFINE_PROP_BIT("msi", HPETState, flags, HPET_MSI_SUPPORT, false), |
701 | 999e12bb | Anthony Liguori | DEFINE_PROP_END_OF_LIST(), |
702 | 999e12bb | Anthony Liguori | }; |
703 | 999e12bb | Anthony Liguori | |
704 | 999e12bb | Anthony Liguori | static void hpet_device_class_init(ObjectClass *klass, void *data) |
705 | 999e12bb | Anthony Liguori | { |
706 | 39bffca2 | Anthony Liguori | DeviceClass *dc = DEVICE_CLASS(klass); |
707 | 999e12bb | Anthony Liguori | SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
708 | 999e12bb | Anthony Liguori | |
709 | 999e12bb | Anthony Liguori | k->init = hpet_init; |
710 | 39bffca2 | Anthony Liguori | dc->no_user = 1;
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711 | 39bffca2 | Anthony Liguori | dc->reset = hpet_reset; |
712 | 39bffca2 | Anthony Liguori | dc->vmsd = &vmstate_hpet; |
713 | 39bffca2 | Anthony Liguori | dc->props = hpet_device_properties; |
714 | 999e12bb | Anthony Liguori | } |
715 | 999e12bb | Anthony Liguori | |
716 | 39bffca2 | Anthony Liguori | static TypeInfo hpet_device_info = {
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717 | 39bffca2 | Anthony Liguori | .name = "hpet",
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718 | 39bffca2 | Anthony Liguori | .parent = TYPE_SYS_BUS_DEVICE, |
719 | 39bffca2 | Anthony Liguori | .instance_size = sizeof(HPETState),
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720 | 39bffca2 | Anthony Liguori | .class_init = hpet_device_class_init, |
721 | 822557eb | Jan Kiszka | }; |
722 | 822557eb | Jan Kiszka | |
723 | 822557eb | Jan Kiszka | static void hpet_register_device(void) |
724 | 822557eb | Jan Kiszka | { |
725 | 39bffca2 | Anthony Liguori | type_register_static(&hpet_device_info); |
726 | 822557eb | Jan Kiszka | } |
727 | 822557eb | Jan Kiszka | |
728 | 822557eb | Jan Kiszka | device_init(hpet_register_device) |