+# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2016 Google, Inc
# Written by Simon Glass <sjg@chromium.org>
#
-# SPDX-License-Identifier: GPL-2.0+
-#
# Entry-type module for a U-Boot binary with an embedded microcode pointer
#
class Entry_u_boot_ucode(Entry_blob):
"""U-Boot microcode block
+ Properties / Entry arguments:
+ None
+
+ The contents of this entry are filled in automatically by other entries
+ which must also be in the image.
+
U-Boot on x86 needs a single block of microcode. This is collected from
the various microcode update nodes in the device tree. It is also unable
to read the microcode from the device tree on platforms that use FSP
the Entry_u_boot_dtb_with_ucode entry, and uses it as the
contents of this entry.
"""
- def __init__(self, image, etype, node):
- Entry_blob.__init__(self, image, etype, node)
+ def __init__(self, section, etype, node):
+ Entry_blob.__init__(self, section, etype, node)
def ObtainContents(self):
- # If the image does not need microcode, there is nothing to do
- ucode_dest_entry = self.image.FindEntryType('u-boot-with-ucode-ptr')
- ucode_dest_entry_spl = self.image.FindEntryType(
- 'u-boot-spl-with-ucode-ptr')
- if ((not ucode_dest_entry or not ucode_dest_entry.target_pos) and
- (not ucode_dest_entry_spl or not ucode_dest_entry_spl.target_pos)):
- self.data = ''
+ # If the section does not need microcode, there is nothing to do
+ found = False
+ for suffix in ['', '-spl', '-tpl']:
+ name = 'u-boot%s-with-ucode-ptr' % suffix
+ entry = self.section.FindEntryType(name)
+ if entry and entry.target_offset:
+ found = True
+ if not found:
+ self.data = b''
return True
-
- # Get the microcode from the device tree entry
- fdt_entry = self.image.FindEntryType('u-boot-dtb-with-ucode')
- if not fdt_entry or not fdt_entry.ucode_data:
+ # Get the microcode from the device tree entry. If it is not available
+ # yet, return False so we will be called later. If the section simply
+ # doesn't exist, then we may as well return True, since we are going to
+ # get an error anyway.
+ for suffix in ['', '-spl', '-tpl']:
+ name = 'u-boot%s-dtb-with-ucode' % suffix
+ fdt_entry = self.section.FindEntryType(name)
+ if fdt_entry:
+ break
+ if not fdt_entry:
+ return True
+ if not fdt_entry.ready:
return False
if not fdt_entry.collate:
- # This section can be empty
- self.data = ''
+ # This binary can be empty
+ self.data = b''
return True
# Write it out to a file
- dtb_name = 'u-boot-ucode.bin'
- fname = tools.GetOutputFilename(dtb_name)
- with open(fname, 'wb') as fd:
- fd.write(fdt_entry.ucode_data)
+ self._pathname = tools.GetOutputFilename('u-boot-ucode.bin')
+ tools.WriteFile(self._pathname, fdt_entry.ucode_data)
- self._pathname = fname
- self.ReadContents()
+ self.ReadBlobContents()
return True