mirror of
https://github.com/qemu/qemu.git
synced 2025-10-31 12:07:31 +00:00
326ccfe240
The RNG module returns a byte of randomness when the Data Valid bit is set. This implementation ignores the prescaler setting, and loads a new value into RNGD every time RNGCS is read while the RNG is enabled and random data is available. A qtest featuring some simple randomness tests is included. Reviewed-by: Tyrone Ting <kfting@nuvoton.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
35 lines
964 B
C
35 lines
964 B
C
/*
|
|
* Nuvoton NPCM7xx Random Number Generator.
|
|
*
|
|
* Copyright 2020 Google LLC
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* for more details.
|
|
*/
|
|
#ifndef NPCM7XX_RNG_H
|
|
#define NPCM7XX_RNG_H
|
|
|
|
#include "hw/sysbus.h"
|
|
|
|
typedef struct NPCM7xxRNGState {
|
|
SysBusDevice parent;
|
|
|
|
MemoryRegion iomem;
|
|
|
|
uint8_t rngcs;
|
|
uint8_t rngd;
|
|
uint8_t rngmode;
|
|
} NPCM7xxRNGState;
|
|
|
|
#define TYPE_NPCM7XX_RNG "npcm7xx-rng"
|
|
#define NPCM7XX_RNG(obj) OBJECT_CHECK(NPCM7xxRNGState, (obj), TYPE_NPCM7XX_RNG)
|
|
|
|
#endif /* NPCM7XX_RNG_H */
|