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51 lines
1.4 KiB
Ruby
51 lines
1.4 KiB
Ruby
# frozen_string_literal: true
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# SPDX-License-Identifier: MIT OR Apache-2.0
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#
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# Copyright (c) 2021-2022 Andre Richter <andre.o.richter@gmail.com>
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# Raspberry Pi 3 + 4
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class RaspberryPi
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attr_reader :kernel_granule, :kernel_virt_addr_space_size, :kernel_virt_start_addr
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MEMORY_SRC = File.read('kernel/src/bsp/raspberrypi/memory.rs').split("\n")
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def initialize
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@kernel_granule = Granule64KiB
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@kernel_virt_addr_space_size = KERNEL_ELF.symbol_value('__kernel_virt_addr_space_size')
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@kernel_virt_start_addr = KERNEL_ELF.symbol_value('__kernel_virt_start_addr')
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@virt_addr_of_kernel_tables = KERNEL_ELF.symbol_value('KERNEL_TABLES')
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@virt_addr_of_phys_kernel_tables_base_addr = KERNEL_ELF.symbol_value(
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'PHYS_KERNEL_TABLES_BASE_ADDR'
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)
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end
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def phys_addr_of_kernel_tables
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KERNEL_ELF.virt_to_phys(@virt_addr_of_kernel_tables)
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end
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def kernel_tables_offset_in_file
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KERNEL_ELF.virt_addr_to_file_offset(@virt_addr_of_kernel_tables)
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end
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def phys_kernel_tables_base_addr_offset_in_file
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KERNEL_ELF.virt_addr_to_file_offset(@virt_addr_of_phys_kernel_tables_base_addr)
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end
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def phys_addr_space_end_page
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x = MEMORY_SRC.grep(/pub const END/)
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x = case BSP_TYPE
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when :rpi3
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x[0]
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when :rpi4
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x[1]
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else
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raise
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end
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x.scan(/\d+/).join.to_i(16)
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end
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end
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