mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-11-05 20:35:44 +00:00
dc288de082
This is a simple device of just one register, and whenever this register is written to it calls qemu_set_irq function for each of 8 bits/IRQs. It is used to implement AVR Power Reduction. [AM: Remove word 'Atmel' from filenames and all elements of code] Suggested-by: Aleksandar Markovic <aleksandar.m.mail@gmail.com> Signed-off-by: Michael Rolnik <mrolnik@gmail.com> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> [rth: Squash include fix and file rename from f4bug] Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Aleksandar Markovic <aleksandar.m.mail@gmail.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Thomas Huth <huth@tuxfamily.org> Message-Id: <20200705140315.260514-22-huth@tuxfamily.org>
113 lines
3.1 KiB
C
113 lines
3.1 KiB
C
/*
|
|
* AVR Power Reduction Management
|
|
*
|
|
* Copyright (c) 2019-2020 Michael Rolnik
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "hw/misc/avr_power.h"
|
|
#include "qemu/log.h"
|
|
#include "hw/qdev-properties.h"
|
|
#include "hw/irq.h"
|
|
#include "trace.h"
|
|
|
|
static void avr_mask_reset(DeviceState *dev)
|
|
{
|
|
AVRMaskState *s = AVR_MASK(dev);
|
|
|
|
s->val = 0x00;
|
|
|
|
for (int i = 0; i < 8; i++) {
|
|
qemu_set_irq(s->irq[i], 0);
|
|
}
|
|
}
|
|
|
|
static uint64_t avr_mask_read(void *opaque, hwaddr offset, unsigned size)
|
|
{
|
|
assert(size == 1);
|
|
assert(offset == 0);
|
|
AVRMaskState *s = opaque;
|
|
|
|
trace_avr_power_read(s->val);
|
|
|
|
return (uint64_t)s->val;
|
|
}
|
|
|
|
static void avr_mask_write(void *opaque, hwaddr offset,
|
|
uint64_t val64, unsigned size)
|
|
{
|
|
assert(size == 1);
|
|
assert(offset == 0);
|
|
AVRMaskState *s = opaque;
|
|
uint8_t val8 = val64;
|
|
|
|
trace_avr_power_write(val8);
|
|
s->val = val8;
|
|
for (int i = 0; i < 8; i++) {
|
|
qemu_set_irq(s->irq[i], (val8 & (1 << i)) != 0);
|
|
}
|
|
}
|
|
|
|
static const MemoryRegionOps avr_mask_ops = {
|
|
.read = avr_mask_read,
|
|
.write = avr_mask_write,
|
|
.endianness = DEVICE_NATIVE_ENDIAN,
|
|
.impl = {
|
|
.max_access_size = 1,
|
|
},
|
|
};
|
|
|
|
static void avr_mask_init(Object *dev)
|
|
{
|
|
AVRMaskState *s = AVR_MASK(dev);
|
|
SysBusDevice *busdev = SYS_BUS_DEVICE(dev);
|
|
|
|
memory_region_init_io(&s->iomem, dev, &avr_mask_ops, s, TYPE_AVR_MASK,
|
|
0x01);
|
|
sysbus_init_mmio(busdev, &s->iomem);
|
|
|
|
for (int i = 0; i < 8; i++) {
|
|
sysbus_init_irq(busdev, &s->irq[i]);
|
|
}
|
|
s->val = 0x00;
|
|
}
|
|
|
|
static void avr_mask_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
dc->reset = avr_mask_reset;
|
|
}
|
|
|
|
static const TypeInfo avr_mask_info = {
|
|
.name = TYPE_AVR_MASK,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(AVRMaskState),
|
|
.class_init = avr_mask_class_init,
|
|
.instance_init = avr_mask_init,
|
|
};
|
|
|
|
static void avr_mask_register_types(void)
|
|
{
|
|
type_register_static(&avr_mask_info);
|
|
}
|
|
|
|
type_init(avr_mask_register_types)
|