40 lines
995 B
Python
40 lines
995 B
Python
from construct import *
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DEVTREE_HEADER_SIGNATURE = "odtr3"
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DEVTREE_HEADER = Struct(
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"signature" / PaddedString(8, "ascii"),
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"revision" / Int32ul,
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"flags" / Int32ul,
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"entries_count" / Int32ul,
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"name_list_offset" / Int32ul
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)
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DEVTREE_ENTRY_FLAGS_MMIO = (1 << 0)
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DEVTREE_ENTRY_TYPE_IO = 0
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DEVTREE_ENTRY_TYPE_FB = 1
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DEVTREE_ENTRY_TYPE_UART = 2
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DEVTREE_ENTRY_TYPE_RAM = 3
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DEVTREE_ENTRY_TYPE_STORAGE = 4
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DEVTREE_ENTRY_TYPE_BUS_CONTROLLER = 5
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DEVTREE_ENTRY_TYPE_RTC = 6
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# Currently flags maps to irq_flags_t in the kernel.
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# Later we might need to enhance irq_flags_from_devtree() to use as translator.
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DEVTREE_IRQ_FLAGS_EDGE_TRIGGER = (1 << 0)
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DEVTREE_ENTRY = Struct(
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"type" / Int32ul,
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"flags" / Int32ul,
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"region_base" / Int64ul,
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"region_size" / Int64ul,
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"irq_lane" / Int32ul,
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"irq_flags" / Int32ul,
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"irq_priority" / Int32ul,
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"rel_name_offset" / Int32ul,
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"aux1" / Int64ul,
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"aux2" / Int64ul,
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"aux3" / Int64ul,
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"aux4" / Int64ul,
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)
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