mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2025-06-21 13:08:42 +00:00
eb8bcb06b3
Modified the copyright year range in code, and corrected "int32_tel" into "Intel" in two "hypervisor/include/debug/profiling.h" and "hypervisor/include/debug/profiling_internal.h". Tracked-On: #7559 Signed-off-by: Ziheng Li <ziheng.li@intel.com>
48 lines
1.4 KiB
Python
48 lines
1.4 KiB
Python
# Copyright (C) 2021-2022 Intel Corporation.
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#
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# SPDX-License-Identifier: BSD-3-Clause
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#
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import os
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from collections import namedtuple
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E820_TYPE_RAM = 1
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E820_TYPE_RESERVED = 2
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E820_TYPE_ACPI = 3
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E820_TYPE_NVS = 4
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E820_TYPE_UNKNOWN = 0xff
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name_of_types = {
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E820_TYPE_RAM: "System RAM",
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E820_TYPE_RESERVED: "Reserved",
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E820_TYPE_ACPI: "ACPI Tables",
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E820_TYPE_NVS: "ACPI Non-volatile Storage",
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E820_TYPE_UNKNOWN: "Unknown E820 type",
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}
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type_of_names = { v: k for (k,v) in name_of_types.items() }
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class E820Entry(namedtuple("E820Entry", ["start", "end", "type"])):
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def __repr__(self):
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return "{0}(start=0x{1:016x}, end=0x{2:016x}, type='{3}')".format(
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self.__class__.__name__, self.start, self.end, name_of_types.get(self.type))
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sysfs_memmap_path = "/sys/firmware/memmap"
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def read_file(path):
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with open(path, "r") as f:
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return f.read()
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return ""
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def parse_e820():
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acc = list()
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for i in os.listdir(sysfs_memmap_path):
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start = int(read_file(os.path.join(sysfs_memmap_path, i, "start")), base=16)
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end = int(read_file(os.path.join(sysfs_memmap_path, i, "end")), base=16)
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type_name = read_file(os.path.join(sysfs_memmap_path, i, "type")).strip()
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ty = type_of_names.get(type_name, E820_TYPE_UNKNOWN)
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acc.append(E820Entry(start, end, ty))
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return sorted(acc, key=lambda x: x.start)
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