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import mmap
import os
import struct
MAP_MASK = mmap.PAGESIZE - 1
WORD = 4
def read(addr):
""" Read from any location in memory
Returns the readed value in hexadecimal format
Keyword arguments:
- addr: The memory address to be readed.
"""
fd = os.open("/dev/mem", os.O_RDWR | os.O_SYNC)
# Map one page
mm = mmap.mmap(fd, mmap.PAGESIZE, mmap.MAP_SHARED, mmap.PROT_WRITE | mmap.PROT_READ, offset=addr & ~MAP_MASK)
mm.seek(addr & MAP_MASK)
retval = struct.unpack('I', mm.read(WORD))
mm.close()
os.close(fd)
return "%08X" % retval[0]
def get_die_id(modelid):
dieid = ""
# get registers
if modelid.find("IGEP0046") == 0:
registers = [0x021BC420, 0x021BC410]
elif modelid.find("IGEP0034") == 0 or modelid.find("SOPA0000") == 0:
# registers: mac_id0_lo, mac_id0_hi, mac_id1_lo, mac_id1_hi
registers = [0x44e10630, 0x44e10634, 0x44e10638, 0x44e1063C]
elif modelid.find("OMAP3") == 0:
registers = [0x4830A224, 0x4830A220, 0x4830A21C, 0x4830A218]
elif modelid.find("OMAP5") == 0:
registers = [0x4A002210, 0x4A00220C, 0x4A002208, 0x4A002200]
else:
raise Exception('modelid not defined')
for rg in registers:
dieid = dieid + read(rg)
return dieid
def get_mac(modelid):
mac = None
if modelid.find("IGEP0034") == 0 or modelid.find("SOPA0000") == 0:
# registers: mac_id0_lo, mac_id0_hi
registers = [0x44e10630, 0x44e10634]
mac = ""
for rg in registers:
mac = mac + read(rg)
return mac
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