forked from Imagelibrary/seL4
1cbaeb97f0
Right now the `platform_gen.json` and `platform_gen.yaml` files contain regions that are not actually used by the kernel. This is fine for `platform_gen.h` because they are guarded by #ifdefs with kernel config defines but the same approach does not work for YAML and JSON. So, this patch changes the Python scripts that generate this files so that they only generate the regions that actually end up being used. Signed-off-by: Ivan-Velickovic <i.velickovic@unsw.edu.au>
70 lines
2.0 KiB
Python
70 lines
2.0 KiB
Python
#
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# Copyright 2023, UNSW
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#
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# SPDX-License-Identifier: GPL-2.0-only
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#
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''' Generate a JSON file with memory region info from the device tree '''
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import argparse
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import json
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from typing import Dict, List
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import hardware
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from hardware.config import Config
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from hardware.fdt import FdtParser
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from hardware.utils.rule import HardwareYaml
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def make_json_list_of_regions(regions) -> List:
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return [
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{
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'start': r.base,
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'end': r.base + r.size
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}
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for r in regions if r.size > 0
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]
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def create_json_file(dev_mem, phys_mem, output_stream):
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json_obj = {
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'devices': make_json_list_of_regions(dev_mem),
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'memory': make_json_list_of_regions(phys_mem)
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}
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with output_stream:
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json.dump(json_obj, output_stream)
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def get_kernel_devices(tree: FdtParser, hw_yaml: HardwareYaml, kernel_config_dict: Dict[str, str]):
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kernel_devices = tree.get_kernel_devices()
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groups = []
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for dev in kernel_devices:
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rule = hw_yaml.get_rule(dev)
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new_regions = rule.get_regions(dev)
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for reg in new_regions:
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if reg.macro in kernel_config_dict:
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if kernel_config_dict[reg.macro] != "ON":
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continue
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groups.append(reg)
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return groups
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def run(tree: FdtParser, hw_yaml: HardwareYaml, config: Config,
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kernel_config_dict, args: argparse.Namespace):
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if not args.json_out:
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raise ValueError('you need to provide a json-out to use the JSON output method')
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phys_mem, reserved, _ = hardware.utils.memory.get_physical_memory(tree, config)
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kernel_devs = get_kernel_devices(tree, hw_yaml, kernel_config_dict)
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dev_mem = hardware.utils.memory.get_addrspace_exclude(
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list(reserved) + phys_mem + kernel_devs, config)
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create_json_file(dev_mem, phys_mem, args.json_out)
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def add_args(parser):
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parser.add_argument('--json-out', help='output file for memory represented in JSON',
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type=argparse.FileType('w'))
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