config/arm/armv8_machine.py

   1 #!/usr/bin/python
   2 # SPDX-License-Identifier: BSD-3-Clause
   3 # Copyright(c) 2017 Cavium, Inc
   4
   5 ident = []
   6 fname = '/sys/devices/system/cpu/cpu0/regs/identification/midr_el1'
   7 with open(fname) as f:
   8     content = f.read()
   9
  10 midr_el1 = (int(content.rstrip('\n'), 16))
  11
  12 ident.append(hex((midr_el1 >> 24) & 0xFF))  # Implementer
  13 ident.append(hex((midr_el1 >> 20) & 0xF))   # Variant
  14 ident.append(hex((midr_el1 >> 16) & 0XF))   # Architecture
  15 ident.append(hex((midr_el1 >> 4) & 0xFFF))  # Primary Part number
  16 ident.append(hex(midr_el1 & 0xF))           # Revision
  17
  18 print(' '.join(ident))