54a5ba13a9
Recent vanilla Raspberry Pi kernels started to make use of the hardware random number generator in BCM2835 SoC. As a result, those kernels wouldn't work anymore under QEMU but rather just freeze during the boot process. This patch implements a trivial BCM2835 compatible RNG, and adds it as a peripheral to BCM2835 platform, which allows to boot a vanilla Raspberry Pi kernel under Qemu. Changes since v1: * Prevented guest from writing [31..20] bits in rng_status * Removed redundant minimum_version_id_old * Added field entries for the state * Changed realize function to reset Signed-off-by: Marcin Chojnacki <marcinch7@gmail.com> Message-id: 20170210210857.47893-1-marcinch7@gmail.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
28 lines
590 B
C
28 lines
590 B
C
/*
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* BCM2835 Random Number Generator emulation
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*
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* Copyright (C) 2017 Marcin Chojnacki <marcinch7@gmail.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef BCM2835_RNG_H
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#define BCM2835_RNG_H
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#include "hw/sysbus.h"
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#define TYPE_BCM2835_RNG "bcm2835-rng"
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#define BCM2835_RNG(obj) \
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OBJECT_CHECK(BCM2835RngState, (obj), TYPE_BCM2835_RNG)
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typedef struct {
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SysBusDevice busdev;
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MemoryRegion iomem;
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uint32_t rng_ctrl;
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uint32_t rng_status;
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} BCM2835RngState;
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#endif
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