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util/apcb/apcb_v3_edit.py: Edit APCB based on different SPD magic 

APCB edit tool edits APCBs with LP4 specific SPDs. Introduce an option
to support different SPD magic so that the tool can be used to edit
APCBs with LP5 specific SPDs.

BUG=None
TEST=Build Skyrim board with LP5 specific SPDs. Build Guybrush board
with LP4 specific SPDs.

Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Change-Id: I8e96c89e4e5ce8e0567a17bf7685b69080fa1708
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63598
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Rob Barnes <robbarnes@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Karthikeyan Ramasubramanian 2022-04-12 16:54:34 -06:00 committed by Felix Held
parent 58d75f80b4
commit 4bdc2320a4
1 changed files with 14 additions and 2 deletions
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16
util/apcb/apcb_v3_edit.py
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@ -14,8 +14,10 @@ import os
# Byte 0 = 0x23 = 512 bytes total / 384 bytes used
# Byte 1 = 0x11 = Revision 1.1
# Byte 2 = 0x11 = LPDDR4X SDRAM
# = 0x13 = LP5 SDRAM
# Byte 3 = 0x0E = Non-DIMM Solution
SPD_MAGIC = bytes.fromhex('2311110E')
LP4_SPD_MAGIC = bytes.fromhex('2311110E')
LP5_SPD_MAGIC = bytes.fromhex('2311130E')
EMPTY_SPD = b'\x00' * 512
spd_ssp_struct_fmt = '??B?IIBBBxIIBBBx'
@ -47,6 +49,11 @@ def parseargs():
'--spd_sources',
nargs='+',
help='List of SPD sources')
parser.add_argument(
'--mem_type',
type=str,
default='lp4',
help='Memory type [lp4|lp5]. Default = lp4')
return parser.parse_args()
@ -62,6 +69,8 @@ def inject(orig, insert, offset):
def main():
spd_magic = LP4_SPD_MAGIC
args = parseargs()
print(f'Reading input APCB from {args.apcb_in}')
@ -75,6 +84,9 @@ def main():
print(f'Using SPD Sources = {args.spd_sources}')
if args.mem_type == 'lp5':
spd_magic = LP5_SPD_MAGIC
spds = []
for spd_source in args.spd_sources:
with open(spd_source, 'rb') as f:
@ -85,7 +97,7 @@ def main():
spd_offset = 0
instance = 0
while True:
spd_offset = apcb.find(SPD_MAGIC, spd_offset)
spd_offset = apcb.find(spd_magic, spd_offset)
if spd_offset < 0:
print('No more SPD magic numbers in APCB')
break