Node / public / precursor-lxmfchat.git / files / xous-core / emulation / peripherals / trng_kernel.cs

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//

// Copyright (c) 2010-2019 Antmicro

//

// This file is licensed under the MIT License.

// Full license text is available in 'licenses/MIT.txt'.

//

using Antmicro.Renode.Core;

using Antmicro.Renode.Core.Structure.Registers;

namespace Antmicro.Renode.Peripherals.Miscellaneous.Betrusted

{

public class BetrustedRNGKernel : BasicDoubleWordPeripheral, IKnownSize

{

public BetrustedRNGKernel(Machine machine) : base(machine)

{

this.IRQ = new GPIO();

DefineRegisters();

}

public long Size { get { return 0x1000; } }

private void DefineRegisters()

{

Registers.STATUS.Define(this) // RDY is set on reset

.WithFlag(0, name: "ready", valueProviderCallback: _ => true)

.WithFlag(1, name: "avail", valueProviderCallback: _ => true)

;

Registers.DATA.Define(this)

.WithValueField(0, 32, FieldMode.Read, valueProviderCallback: _ =>

{

return (uint)rng.Next();

}, name: "DATA");

Registers.URANDOM.Define(this)

.WithValueField(0, 32, FieldMode.Read, valueProviderCallback: _ =>

{

return (uint)rng.Next();

}, name: "URANDOM");

Registers.URANDOM_VALID.Define(this)

.WithFlag(0, FieldMode.Read, valueProviderCallback: _ => true, name: "URANDOM_VALID");

}

private readonly PseudorandomNumberGenerator rng = EmulationManager.Instance.CurrentEmulation.RandomGenerator;

public GPIO IRQ { get; private set; }

private enum Registers

{

STATUS = 0x0,

DATA = 0x4,

URANDOM = 0x8,

URANDOM_VALID = 0xc,

EV_STATUS = 0x10,

EV_PENDING = 0x14,

EV_ENABLE = 0x18,

}

}

}