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acrn-config: enhance the target config

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1. add misc.py to get systemd ram and root device
2. add more specify comments for arguments of functions

v1-v2:
    typo: Parser -> Parse
    some grammar check

v2-v3:
    add the message for Cx state

Tracked-On: #3602
Signed-off-by: Wei Liu <weix.w.liu@intel.com>
Acked-by: Terry Zou <terry.zou@intel.com>
Acked-by: Victor Sun <victor.sun@intel.com>
This commit is contained in:
Wei Liu
2019-08-02 19:17:58 +08:00
committed by wenlingz
parent 6045a5e54c
commit b73f97aaba
13 changed files with 317 additions and 102 deletions
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29
misc/acrn-config/target/dmar.py
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@@ -203,7 +203,13 @@ class PathDevFun:
def walk_pci_bus(tmp_pdf, dmar_tbl, dmar_hw_list, n_cnt, drhd_cnt):
"""Walk Pci bus"""
"""Walk Pci bus
:param tmp_pdf: it is a class what contains path,device,function in dmar device scope region
:param dmar_tbl: it is a class to describe dmar which contains Device Scope and DRHD
:param dmar_hw_list: it is a class to describe hardware scope in DMAR table
:param n_cnt: the number of device in device scope
:param drhd_cnt: it is a counter to calculate the DRHD in DMAR table
"""
while n_cnt:
scope_path = DevScopePath.from_address(dmar_tbl.path_offset)
tmp_pdf.device = scope_path.device
@@ -223,7 +229,12 @@ def walk_pci_bus(tmp_pdf, dmar_tbl, dmar_hw_list, n_cnt, drhd_cnt):
def walk_dev_scope(dmar_tbl, dmar_dev_list, dmar_hw_list, drhd_cnt):
"""Walk device scope"""
"""Walk device scope
:param dmar_tbl: it is a class to describe dmar which contains Device Scope and DRHD
:param dmar_dev_list: it is a class to describe device scope in DMAR table
:param dmar_hw_list: it is a class to describe DRHD in DMAR table
:param drhd_cnt: it is a counter to calculate the DRHD in DMAR table
"""
dmar_tbl.dev_scope_offset = dmar_tbl.sub_tbl_offset + ctypes.sizeof(DmarHwUnit)
scope_end = dmar_tbl.dev_scope_offset + dmar_tbl.dmar_drhd.sub_header.length
dmar_tbl.dev_scope_cnt = 0
@@ -259,7 +270,12 @@ def walk_dev_scope(dmar_tbl, dmar_dev_list, dmar_hw_list, drhd_cnt):
def walk_dmar_table(dmar_tbl, dmar_hw_list, dmar_dev_list, sysnode):
"""Walk dmar table and get information"""
"""Walk dmar table and get information
:param dmar_tbl: it is a class to describe dmar which contains Device Scope and DRHD
:param dmar_hw_list: it is a class to describe hardware scope in DMAR table
:param dmar_dev_list: it is a class to describe device scope in DMAR table
:param sysnode: the system device node of acpi table, such as: /sys/firmware/acpi/tables/DMAR
"""
data = open(sysnode, 'rb').read()
buf = ctypes.create_string_buffer(data, len(data))
addr = ctypes.addressof(buf)
@@ -289,7 +305,7 @@ def walk_dmar_table(dmar_tbl, dmar_hw_list, dmar_dev_list, sysnode):
dmar_hw_list.hw_flags_list.append(dmar_tbl.dmar_drhd.flags)
dmar_hw_list.hw_address_list.append(dmar_tbl.dmar_drhd.address)
# in end of DRHD/sub tbl header is devscope
# in end of DRHD/sub tbl header is dev scope, then enumerate the device scope
(dmar_tbl, dmar_dev_list, dmar_hw_list) = walk_dev_scope(
dmar_tbl, dmar_dev_list, dmar_hw_list, drhd_cnt)
@@ -301,7 +317,10 @@ def walk_dmar_table(dmar_tbl, dmar_hw_list, dmar_dev_list, sysnode):
def write_dmar_data(sysnode, config):
"""Write the DMAR data to board info"""
"""Write the DMAR data to board info
:param sysnode: the system device node of acpi table, such as: /sys/firmware/acpi/tables/DMAR
:param config: file pointer that opened for writing board information
"""
dmar_hw_list = DmarHwList()
dmar_dev_list = DmarDevList()