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Diffstat (limited to '')
| -rw-r--r-- | tools/sptool/sp_mk_generator.py | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/tools/sptool/sp_mk_generator.py b/tools/sptool/sp_mk_generator.py new file mode 100644 index 0000000..f3af584 --- /dev/null +++ b/tools/sptool/sp_mk_generator.py @@ -0,0 +1,232 @@ +#!/usr/bin/python3 +# Copyright (c) 2020-2022, Arm Limited. All rights reserved. +# +# SPDX-License-Identifier: BSD-3-Clause + +""" +This script is invoked by Make system and generates secure partition makefile. +It expects platform provided secure partition layout file which contains list +of Secure Partition Images and Partition manifests(PM). +Layout file can exist outside of TF-A tree and the paths of Image and PM files +must be relative to it. + +This script parses the layout file and generates a make file which updates +FDT_SOURCES, FIP_ARGS, CRT_ARGS and SPTOOL_ARGS which are used in later build +steps. +If the SP entry in the layout file has a "uuid" field the scripts gets the UUID +from there, otherwise it parses the associated partition manifest and extracts +the UUID from there. + +param1: Generated mk file "sp_gen.mk" +param2: "SP_LAYOUT_FILE", json file containing platform provided information +param3: plat out directory +param4: CoT parameter + +Generated "sp_gen.mk" file contains triplet of following information for each +Secure Partition entry + FDT_SOURCES += sp1.dts + SPTOOL_ARGS += -i sp1.bin:sp1.dtb -o sp1.pkg + FIP_ARGS += --blob uuid=XXXXX-XXX...,file=sp1.pkg + CRT_ARGS += --sp-pkg1 sp1.pkg + +A typical SP_LAYOUT_FILE file will look like +{ + "SP1" : { + "image": "sp1.bin", + "pm": "test/sp1.dts" + }, + + "SP2" : { + "image": "sp2.bin", + "pm": "test/sp2.dts", + "uuid": "1b1820fe-48f7-4175-8999-d51da00b7c9f" + } + + ... +} + +""" +import json +import os +import re +import sys +import uuid +from spactions import SpSetupActions + +MAX_SP = 8 +UUID_LEN = 4 + +# Some helper functions to access args propagated to the action functions in +# SpSetupActions framework. +def check_sp_mk_gen(args :dict): + if "sp_gen_mk" not in args.keys(): + raise Exception(f"Path to file sp_gen.mk needs to be in 'args'.") + +def check_out_dir(args :dict): + if "out_dir" not in args.keys() or not os.path.isdir(args["out_dir"]): + raise Exception("Define output folder with \'out_dir\' key.") + +def check_sp_layout_dir(args :dict): + if "sp_layout_dir" not in args.keys() or not os.path.isdir(args["sp_layout_dir"]): + raise Exception("Define output folder with \'sp_layout_dir\' key.") + +def write_to_sp_mk_gen(content, args :dict): + check_sp_mk_gen(args) + with open(args["sp_gen_mk"], "a") as f: + f.write(f"{content}\n") + +def get_sp_manifest_full_path(sp_node, args :dict): + check_sp_layout_dir(args) + return os.path.join(args["sp_layout_dir"], get_file_from_layout(sp_node["pm"])) + +def get_sp_img_full_path(sp_node, args :dict): + check_sp_layout_dir(args) + return os.path.join(args["sp_layout_dir"], get_file_from_layout(sp_node["image"])) + +def get_sp_pkg(sp, args :dict): + check_out_dir(args) + return os.path.join(args["out_dir"], f"{sp}.pkg") + +def is_line_in_sp_gen(line, args :dict): + with open(args["sp_gen_mk"], "r") as f: + sppkg_rule = [l for l in f if line in l] + return len(sppkg_rule) != 0 + +def get_file_from_layout(node): + ''' Helper to fetch a file path from sp_layout.json. ''' + if type(node) is dict and "file" in node.keys(): + return node["file"] + return node + +def get_offset_from_layout(node): + ''' Helper to fetch an offset from sp_layout.json. ''' + if type(node) is dict and "offset" in node.keys(): + return int(node["offset"], 0) + return None + +def get_image_offset(node): + ''' Helper to fetch image offset from sp_layout.json ''' + return get_offset_from_layout(node["image"]) + +def get_pm_offset(node): + ''' Helper to fetch pm offset from sp_layout.json ''' + return get_offset_from_layout(node["pm"]) + +@SpSetupActions.sp_action(global_action=True) +def check_max_sps(sp_layout, _, args :dict): + ''' Check validate the maximum number of SPs is respected. ''' + if len(sp_layout.keys()) > MAX_SP: + raise Exception(f"Too many SPs in SP layout file. Max: {MAX_SP}") + return args + +@SpSetupActions.sp_action +def gen_fdt_sources(sp_layout, sp, args :dict): + ''' Generate FDT_SOURCES values for a given SP. ''' + manifest_path = get_sp_manifest_full_path(sp_layout[sp], args) + write_to_sp_mk_gen(f"FDT_SOURCES += {manifest_path}", args) + return args + +@SpSetupActions.sp_action +def gen_sptool_args(sp_layout, sp, args :dict): + ''' Generate Sp Pkgs rules. ''' + sp_pkg = get_sp_pkg(sp, args) + sp_dtb_name = os.path.basename(get_file_from_layout(sp_layout[sp]["pm"]))[:-1] + "b" + sp_dtb = os.path.join(args["out_dir"], f"fdts/{sp_dtb_name}") + + # Do not generate rule if already there. + if is_line_in_sp_gen(f'{sp_pkg}:', args): + return args + write_to_sp_mk_gen(f"SP_PKGS += {sp_pkg}\n", args) + + sptool_args = f" -i {get_sp_img_full_path(sp_layout[sp], args)}:{sp_dtb}" + pm_offset = get_pm_offset(sp_layout[sp]) + sptool_args += f" --pm-offset {pm_offset}" if pm_offset is not None else "" + image_offset = get_image_offset(sp_layout[sp]) + sptool_args += f" --img-offset {image_offset}" if image_offset is not None else "" + sptool_args += f" -o {sp_pkg}" + sppkg_rule = f''' +{sp_pkg}: {sp_dtb} +\t$(Q)echo Generating {sp_pkg} +\t$(Q)$(PYTHON) $(SPTOOL) {sptool_args} +''' + write_to_sp_mk_gen(sppkg_rule, args) + return args + +@SpSetupActions.sp_action(global_action=True, exec_order=1) +def check_dualroot(sp_layout, _, args :dict): + ''' Validate the amount of SPs from SiP and Platform owners. ''' + if not args.get("dualroot"): + return args + args["split"] = int(MAX_SP / 2) + owners = [sp_layout[sp].get("owner") for sp in sp_layout] + args["plat_max_count"] = owners.count("Plat") + # If it is owned by the platform owner, it is assigned to the SiP. + args["sip_max_count"] = len(sp_layout.keys()) - args["plat_max_count"] + if args["sip_max_count"] > args["split"] or args["sip_max_count"] > args["split"]: + print(f"WARN: SiP Secure Partitions should not be more than {args['split']}") + # Counters for gen_crt_args. + args["sip_count"] = 1 + args["plat_count"] = 1 + return args + +@SpSetupActions.sp_action +def gen_crt_args(sp_layout, sp, args :dict): + ''' Append CRT_ARGS. ''' + # If "dualroot" is configured, 'sp_pkg_idx' depends on whether the SP is owned + # by the "SiP" or the "Plat". + if args.get("dualroot"): + # If the owner is not specified as "Plat", default to "SiP". + if sp_layout[sp].get("owner") == "Plat": + if args["plat_count"] > args["plat_max_count"]: + raise ValueError("plat_count can't surpass plat_max_count in args.") + sp_pkg_idx = args["plat_count"] + args["split"] + args["plat_count"] += 1 + else: + if args["sip_count"] > args["sip_max_count"]: + raise ValueError("sip_count can't surpass sip_max_count in args.") + sp_pkg_idx = args["sip_count"] + args["sip_count"] += 1 + else: + sp_pkg_idx = [k for k in sp_layout.keys()].index(sp) + 1 + write_to_sp_mk_gen(f"CRT_ARGS += --sp-pkg{sp_pkg_idx} {get_sp_pkg(sp, args)}\n", args) + return args + +@SpSetupActions.sp_action +def gen_fiptool_args(sp_layout, sp, args :dict): + ''' Generate arguments for the FIP Tool. ''' + if "uuid" in sp_layout[sp]: + # Extract the UUID from the JSON file if the SP entry has a 'uuid' field + uuid_std = uuid.UUID(sp_layout[sp]['uuid']) + else: + with open(get_sp_manifest_full_path(sp_layout[sp], args), "r") as pm_f: + uuid_lines = [l for l in pm_f if 'uuid' in l] + assert(len(uuid_lines) == 1) + # The uuid field in SP manifest is the little endian representation + # mapped to arguments as described in SMCCC section 5.3. + # Convert each unsigned integer value to a big endian representation + # required by fiptool. + uuid_parsed = re.findall("0x([0-9a-f]+)", uuid_lines[0]) + y = list(map(bytearray.fromhex, uuid_parsed)) + z = [int.from_bytes(i, byteorder='little', signed=False) for i in y] + uuid_std = uuid.UUID(f'{z[0]:08x}{z[1]:08x}{z[2]:08x}{z[3]:08x}') + write_to_sp_mk_gen(f"FIP_ARGS += --blob uuid={str(uuid_std)},file={get_sp_pkg(sp, args)}\n", args) + return args + +def init_sp_actions(sys): + sp_layout_file = os.path.abspath(sys.argv[2]) + with open(sp_layout_file) as json_file: + sp_layout = json.load(json_file) + # Initialize arguments for the SP actions framework + args = {} + args["sp_gen_mk"] = os.path.abspath(sys.argv[1]) + args["sp_layout_dir"] = os.path.dirname(sp_layout_file) + args["out_dir"] = os.path.abspath(sys.argv[3]) + args["dualroot"] = sys.argv[4] == "dualroot" + #Clear content of file "sp_gen.mk". + with open(args["sp_gen_mk"], "w"): + None + return args, sp_layout + +if __name__ == "__main__": + args, sp_layout = init_sp_actions(sys) + SpSetupActions.run_actions(sp_layout, args) |