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#-------------------------------------------------------------------------------
# Copyright (c) 2018-2021, Arm Limited. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
#-------------------------------------------------------------------------------
import os
import io
import sys
import argparse
from jinja2 import Environment, BaseLoader, select_autoescape, TemplateNotFound
try:
import yaml
except ImportError as e:
print (str(e) + " To install it, type:")
print ("pip install PyYAML")
exit(1)
donotedit_warning = \
"/*********** " + \
"WARNING: This is an auto-generated file. Do not edit!" + \
" ***********/"
OUT_DIR = None # The root directory that files are generated to
class TemplateLoader(BaseLoader):
"""
Template loader class.
An instance of this class is passed to the template engine. It is
responsible for reading the template file
"""
def __init__(self):
pass
def get_source(self, environment, template):
"""
This function reads the template files.
For detailed documentation see:
http://jinja.pocoo.org/docs/2.10/api/#jinja2.BaseLoader.get_source
Please note that this function always return 'false' as 'uptodate'
value, so the output file will always be generated.
"""
if not os.path.isfile(template):
raise TemplateNotFound(template)
with open(template) as f:
source = f.read()
return source, template, False
def process_manifest(manifest_list_files):
"""
Parse the input manifest, generate the data base for genereated files
and generate manifest header files.
Parameters
----------
manifest_list_files:
The manifest lists to parse.
Returns
-------
The partition data base.
"""
partition_db = []
manifest_list = []
for f in manifest_list_files:
with open(f) as manifest_list_yaml_file:
manifest_dic = yaml.safe_load(manifest_list_yaml_file)
manifest_list.extend(manifest_dic["manifest_list"])
manifesttemplate = ENV.get_template('secure_fw/partitions/manifestfilename.template')
memorytemplate = ENV.get_template('secure_fw/partitions/partition_intermedia.template')
pid_list = []
no_pid_manifest_idx = []
for i, manifest_item in enumerate(manifest_list):
# Check if partition ID is manually set
if 'pid' not in manifest_item.keys():
no_pid_manifest_idx.append(i)
continue
# Check if partition ID is duplicated
if manifest_item['pid'] in pid_list:
raise Exception("PID No. {pid} has already been used!".format(pid=manifest_item['pid']))
pid_list.append(manifest_item['pid'])
# Automatically generate PIDs for partitions without PID
pid = 256
for idx in no_pid_manifest_idx:
while pid in pid_list:
pid += 1
manifest_list[idx]['pid'] = pid
pid_list.append(pid)
print("Start to generate PSA manifests:")
for manifest_item in manifest_list:
# Replace environment variables in the manifest path
manifest_path = os.path.expandvars(manifest_item['manifest'])
file = open(manifest_path)
manifest = yaml.safe_load(file)
utilities = {}
utilities['donotedit_warning']=donotedit_warning
context = {}
context['manifest'] = manifest
context['attr'] = manifest_item
context['utilities'] = utilities
manifest_dir, manifest_name = os.path.split(manifest_path)
outfile_name = manifest_name.replace('yaml', 'h').replace('json', 'h')
context['file_name'] = outfile_name.replace('.h', '')
outfile_name = os.path.join(manifest_dir, "psa_manifest", outfile_name).replace('\\', '/')
intermediafile_name = os.path.join(manifest_dir, "auto_generated", 'intermedia_' + context['file_name'] + '.c').replace('\\', '/')
"""
Remove the `source_path` portion of the filepaths, so that it can be
interpreted as a relative path from the OUT_DIR.
"""
if 'source_path' in manifest_item:
# Replace environment variables in the source path
source_path = os.path.expandvars(manifest_item['source_path'])
outfile_name = os.path.relpath(outfile_name, start = source_path)
intermediafile_name = os.path.relpath(intermediafile_name, start = source_path)
partition_db.append({"manifest": manifest, "attr": manifest_item, "header_file": outfile_name})
if OUT_DIR is not None:
outfile_name = os.path.join(OUT_DIR, outfile_name)
intermediafile_name = os.path.join(OUT_DIR, intermediafile_name)
outfile_path = os.path.dirname(outfile_name)
if not os.path.exists(outfile_path):
os.makedirs(outfile_path)
print ("Generating " + outfile_name)
outfile = io.open(outfile_name, "w", newline=None)
outfile.write(manifesttemplate.render(context))
outfile.close()
intermediafile_path = os.path.dirname(intermediafile_name)
if not os.path.exists(intermediafile_path):
os.makedirs(intermediafile_path)
print ("Generating " + intermediafile_name)
memoutfile = io.open(intermediafile_name, "w", newline=None)
memoutfile.write(memorytemplate.render(context))
memoutfile.close()
return partition_db
def gen_files(context, gen_file_lists):
"""
Generate files according to the gen_file_list
Parameters
----------
gen_file_lists:
The lists of files to generate
"""
file_list = []
for f in gen_file_lists:
with open(f) as file_list_yaml_file:
file_list_yaml = yaml.safe_load(file_list_yaml_file)
file_list.extend(file_list_yaml["file_list"])
print("Start to generate file from the generated list:")
for file in file_list:
# Replace environment variables in the output filepath
outfile_name = os.path.expandvars(file["output"])
# Replace environment variables in the template filepath
templatefile_name = os.path.expandvars(file["template"])
if OUT_DIR is not None:
outfile_name = os.path.join(OUT_DIR, outfile_name)
print ("Generating " + outfile_name)
outfile_path = os.path.dirname(outfile_name)
if not os.path.exists(outfile_path):
os.makedirs(outfile_path)
template = ENV.get_template(templatefile_name)
outfile = io.open(outfile_name, "w", newline=None)
outfile.write(template.render(context))
outfile.close()
print ("Generation of files done")
def process_stateless_services(partitions, static_handle_max_num):
"""
This function collects all stateless services together, and allocates
stateless handles for them.
If the stateless handle is set to a valid value in yaml/json file, it is
converted to a index directly, if the stateless handle is set as "auto",
or not set, framework will allocate a valid index for the service.
After that, framework puts each service into a reordered stateless service
list at position of "index". Other positions in list are left "None".
"""
raw_stateless_services = []
# Collect all stateless services first.
for partition in partitions:
# Skip the FF-M 1.0 partitions
if partition['manifest']['psa_framework_version'] < 1.1:
continue
# Skip the Non-IPC partitions
if partition['attr']['tfm_partition_ipc'] is not True:
continue
for service in partition['manifest']['services']:
if 'connection_based' not in service:
raise Exception("'connection_based' is mandatory in FF-M 1.1 service!")
if service['connection_based'] is False:
raw_stateless_services.append(service)
if len(raw_stateless_services) == 0:
return []
if len(raw_stateless_services) > static_handle_max_num:
raise Exception("Stateless service numbers range exceed.")
"""
Allocate an empty stateless service list to store services and find the
service easily by handle.
Use service stateless handle values as indexes. Put service in the list
at index "handle - 1", since handle value starts from 1 and list index
starts from 0.
"""
reordered_stateless_services = [None] * static_handle_max_num
for service in raw_stateless_services:
service_handle = service['stateless_handle']
# Fill in service list with specified stateless handle, otherwise skip
if isinstance(service_handle, int):
if service_handle < 1 or service_handle > static_handle_max_num:
raise Exception("Invalid stateless_handle setting.")
# Convert handle index to reordered service list index
service_handle = service_handle - 1
if reordered_stateless_services[service_handle] is not None:
raise Exception("Duplicated stateless_handle setting.")
reordered_stateless_services[service_handle] = service
# Remove recorded node from the existing list
raw_stateless_services.remove(service)
# Auto-allocate stateless handle and encode the stateless handle
for i in range(0, static_handle_max_num):
service = reordered_stateless_services[i]
if service == None and len(raw_stateless_services) > 0:
service = raw_stateless_services.pop(0)
"""
Encode stateless flag and version into stateless handle
bit 30: stateless handle indicator
bit 15-8: stateless service version
bit 7-0: stateless handle index
"""
stateless_handle_value = 0
if service != None:
stateless_index = (i & 0xFF)
stateless_handle_value |= stateless_index
stateless_flag = 1 << 30
stateless_handle_value |= stateless_flag
stateless_version = (service['version'] & 0xFF) << 8
stateless_handle_value |= stateless_version
service['stateless_handle_value'] = '0x{0:08x}'.format(stateless_handle_value)
reordered_stateless_services[i] = service
return reordered_stateless_services
def parse_args():
parser = argparse.ArgumentParser(description='Parse secure partition manifest list and generate files listed by the file list',
epilog='Note that environment variables in template files will be replaced with their values')
parser.add_argument('-o', '--outdir'
, dest='outdir'
, required=False
, default=None
, metavar='out_dir'
, help='The root directory for generated files, the default is TF-M root folder.')
parser.add_argument('-m', '--manifest'
, nargs='+'
, dest='manifest_args'
, required=True
, metavar='manifest'
, help='A set of secure partition manifest lists to parse')
parser.add_argument('-f', '--file-list'
, nargs='+'
, dest='gen_file_args'
, required=True
, metavar='file-list'
, help='These files descripe the file list to generate')
args = parser.parse_args()
manifest_args = args.manifest_args
gen_file_args = args.gen_file_args
return args
ENV = Environment(
loader = TemplateLoader(),
autoescape = select_autoescape(['html', 'xml']),
lstrip_blocks = True,
trim_blocks = True,
keep_trailing_newline = True
)
def main():
"""
The entry point of the script.
Generates the output files based on the templates and the manifests.
"""
global OUT_DIR
args = parse_args()
manifest_args = args.manifest_args
gen_file_args = args.gen_file_args
OUT_DIR = args.outdir
manifest_list = [os.path.abspath(x) for x in args.manifest_args]
gen_file_list = [os.path.abspath(x) for x in args.gen_file_args]
# Arguments could be relative path.
# Convert to absolute path as we are going to change diretory later
if OUT_DIR is not None:
OUT_DIR = os.path.abspath(OUT_DIR)
"""
Relative path to TF-M root folder is supported in the manifests
and default value of manifest list and generated file list are relative to TF-M root folder as well,
so first change directory to TF-M root folder.
By doing this, the script can be executed anywhere
The script is located in <TF-M root folder>/tools, so sys.path[0]<location of the script>/.. is TF-M root folder.
"""
os.chdir(os.path.join(sys.path[0], ".."))
partition_db = process_manifest(manifest_list)
utilities = {}
context = {}
utilities['donotedit_warning'] = donotedit_warning
context['partitions'] = partition_db
context['utilities'] = utilities
context['stateless_services'] = process_stateless_services(partition_db, 32)
gen_files(context, gen_file_list)
if __name__ == "__main__":
main()
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