Ivan Grokhotkov
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/*
|
|
* ESP32 Random Number Generator peripheral
|
|
*
|
|
* Copyright (c) 2019 Espressif Systems (Shanghai) Co. Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qemu/log.h"
|
|
#include "qemu/error-report.h"
|
|
#include "qemu/guest-random.h"
|
|
#include "qapi/error.h"
|
|
#include "hw/hw.h"
|
|
#include "hw/sysbus.h"
|
|
#include "hw/misc/esp32_rng.h"
|
|
|
|
|
|
static uint64_t esp32_rng_read(void *opaque, hwaddr addr, unsigned int size)
|
|
{
|
|
uint32_t r = 0;
|
|
qemu_guest_getrandom_nofail(&r, sizeof(r));
|
|
return r;
|
|
}
|
|
|
|
static const MemoryRegionOps esp32_rng_ops = {
|
|
.read = esp32_rng_read,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
static void esp32_rng_init(Object *obj)
|
|
{
|
|
Esp32RngState *s = ESP32_RNG(obj);
|
|
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
|
|
|
|
memory_region_init_io(&s->iomem, obj, &esp32_rng_ops, s,
|
|
TYPE_ESP32_RNG, sizeof(uint32_t));
|
|
sysbus_init_mmio(sbd, &s->iomem);
|
|
}
|
|
|
|
|
|
static const TypeInfo esp32_rng_info = {
|
|
.name = TYPE_ESP32_RNG,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(Esp32RngState),
|
|
.instance_init = esp32_rng_init,
|
|
};
|
|
|
|
static void esp32_rng_register_types(void)
|
|
{
|
|
type_register_static(&esp32_rng_info);
|
|
}
|
|
|
|
type_init(esp32_rng_register_types)
|