Dmitry Yakovlev
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/*
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* ESP32-S3 System Timer
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*
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* Copyright (c) 2024 Espressif Systems (Shanghai) Co. Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 or
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* (at your option) any later version.
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*/
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#include "qemu/osdep.h"
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#include "hw/hw.h"
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#include "hw/sysbus.h"
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#include "hw/registerfields.h"
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#include "hw/boards.h"
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#include "hw/timer/esp32s3_systimer.h"
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static void esp32c3_systimer_write(void *opaque, hwaddr addr, uint64_t value, unsigned int size)
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{
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ESP32S3SysTimerClass *class = ESP32S3_SYSTIMER_GET_CLASS(opaque);
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ESP32S3SysTimerState *s = ESP32S3_SYSTIMER(opaque);
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class->parent_systimer_write(opaque, addr, value, size);
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if (addr == A_SYSTIMER_INT_ENA) {
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/* If the timer virtual interrupt is enabled too late, we may miss the interrupt in QEMU
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* and not reprogram the next iteration. */
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class->parent_class.comparators_reprogram(&s->parent);
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}
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}
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static void esp32s3_systimer_class_init(ObjectClass *klass, void *data)
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{
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ESP32S3SysTimerClass* esp32s3 = ESP32S3_SYSTIMER_CLASS(klass);
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ESPSysTimerClass* esp = ESP_SYSTIMER_CLASS(klass);
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/* Override the register read method */
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esp32s3->parent_systimer_write = esp->systimer_ops.write;
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esp->systimer_ops.write = esp32c3_systimer_write;
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}
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static const TypeInfo esp32s3_systimer_info = {
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.name = TYPE_ESP32S3_SYSTIMER,
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.parent = TYPE_ESP_SYSTIMER,
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.instance_size = sizeof(ESP32S3SysTimerState),
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.class_init = esp32s3_systimer_class_init,
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.class_size = sizeof(ESP32S3SysTimerClass),
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};
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static void esp32s3_systimer_register_types(void)
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{
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type_register_static(&esp32s3_systimer_info);
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}
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type_init(esp32s3_systimer_register_types)
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