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3c6ad4c7db
We'll need part_num() to determine the MMIO address base. It's 0x3F000000 on rpi3 but 0xFE000000 on rpi4.
37 lines
766 B
C++
37 lines
766 B
C++
/*
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* Copyright (c) 2021, Nico Weber <thakis@chromium.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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namespace Prekernel {
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class MainIdRegister {
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public:
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MainIdRegister();
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enum Implementer {
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ArmLimited = 0x41,
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};
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unsigned implementer() const { return (m_value >> 24) & 0xFF; }
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unsigned variant() const { return (m_value >> 20) & 0xF; }
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unsigned architecture() const { return (m_value >> 16) & 0xF; }
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enum PartNum {
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RaspberryPi1 = 0xB76,
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RaspberryPi2 = 0xC07,
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RaspberryPi3 = 0xD03,
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RaspberryPi4 = 0xD08,
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};
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unsigned part_num() const { return (m_value >> 4) & 0xFFF; }
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unsigned revision() const { return m_value & 0xF; }
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private:
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unsigned int m_value;
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};
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}
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