mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-05 18:56:15 +09:00
5af1207ec9
A Firmware Image Table (FIT) is a data structure defined by Intel which contains information about various things needed by the SoC, such as microcode. Add support for this entry as well as the pointer to it. The contents of FIT are fixed at present. Future work is needed to support adding microcode, etc. Signed-off-by: Simon Glass <sjg@chromium.org>
42 lines
1.4 KiB
Python
42 lines
1.4 KiB
Python
# SPDX-License-Identifier: GPL-2.0+
|
|
# Copyright (c) 2016 Google, Inc
|
|
# Written by Simon Glass <sjg@chromium.org>
|
|
#
|
|
# Entry-type module for a pointer to an Intel Firmware Image Table
|
|
#
|
|
|
|
import struct
|
|
|
|
from blob import Entry_blob
|
|
|
|
class Entry_intel_fit_ptr(Entry_blob):
|
|
"""Intel Firmware Image Table (FIT) pointer
|
|
|
|
This entry contains a pointer to the FIT. It is required to be at address
|
|
0xffffffc0 in the image.
|
|
"""
|
|
def __init__(self, section, etype, node):
|
|
Entry_blob.__init__(self, section, etype, node)
|
|
if self.HasSibling('intel-fit') is False:
|
|
self.Raise("'intel-fit-ptr' section must have an 'intel-fit' sibling")
|
|
|
|
def _GetContents(self):
|
|
fit_pos = self.GetSiblingImagePos('intel-fit')
|
|
return struct.pack('<II', fit_pos or 0, 0)
|
|
|
|
def ObtainContents(self):
|
|
self.SetContents(self._GetContents())
|
|
return True
|
|
|
|
def ProcessContents(self):
|
|
"""Write an updated version of the FIT pointer to this entry
|
|
|
|
This is necessary since image_pos is not available when ObtainContents()
|
|
is called, since by then the entries have not been packed in the image.
|
|
"""
|
|
return self.ProcessContentsUpdate(self._GetContents())
|
|
|
|
def Pack(self, offset):
|
|
"""Special pack method to set the offset to the right place"""
|
|
return Entry_blob.Pack(self, 0xffffffc0)
|