[Arista7260cx3] Add platform specific reboot tool (#1318)

* [Arista7260cx3] Add platform specific reboot tool

* [utilities] update sonic-utilities submodule
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Ying Xie 2018-01-18 17:28:36 -08:00 committed by GitHub
parent 33157dc2ad
commit 163a0e2165
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2 changed files with 88 additions and 1 deletions

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#!/usr/bin/env python
# Copyright (c) 2018 Arista Networks, Inc. All rights reserved.
# Arista Networks, Inc. Confidential and Proprietary.
# Reboot script for 7260CX3
from __future__ import print_function
import sys
import mmap, os
import subprocess
from struct import pack, unpack
class MmapResource( object ):
"""Resource implementation for a directly-mapped memory region."""
def __init__( self, path ):
try:
fd = os.open( path, os.O_RDWR )
except EnvironmentError:
print( "FAIL can not open scd memory-map resource file" )
print( "FAIL are you running on the proper platform?" )
sys.exit( 1 )
try:
size = os.fstat( fd ).st_size
except EnvironmentError:
print( "FAIL can not fstat scd memory-map resource file" )
print( "FAIL are you running on the proper platform?" )
sys.exit( 1 )
try:
self.mmap_ = mmap.mmap( fd, size, mmap.MAP_SHARED,
mmap.PROT_READ | mmap.PROT_WRITE )
except EnvironmentError:
print( "FAIL can not map scd memory-map file" )
print( "FAIL are you running on the proper platform?" )
sys.exit( 1 )
finally:
try:
# Note that closing the file descriptor has no effect on the memory map
os.close( fd )
except EnvironmentError:
print( "FAIL failed to close scd memory-map file" )
sys.exit( 1 )
def read32( self, addr ):
return unpack( '<L', self.mmap_[ addr : addr + 4 ] )[ 0 ]
def write32( self, addr, value ):
self.mmap_[ addr: addr + 4 ] = pack( '<L', value )
def scdRegTest( scd, offset, val1, count ):
scd.write32( offset, val1 )
val2 = scd.read32( offset )
if val1 != val2:
print( "FAIL: scd write 0x%08x but read back 0x%08x in iter %d" %
( val1, val2, count ) )
sys.exit( 17 )
def scdScrRegTest( scd ):
scrOffset = 0x0130
for i in range( 0, 3 ):
scdRegTest( scd, scrOffset, 0xdeadbeef, i )
scdRegTest( scd, scrOffset, 0xa5a5a5a5, i )
scdRegTest( scd, scrOffset, 0x00000000, i )
def reboot( scd ):
# reboot the system by writing to register 0x7000
print( "Rebooting" )
scd.write32( 0x7000, 0xDEAD )
print( "REBOOTED" )
def main():
busName = "/sys/bus/pci/devices/0000:ff:0b.3/resource0"
subprocess.call( [ 'modprobe', 'scd' ] )
scd = MmapResource( busName )
#
# verify that we can read/write scd scratch register
#
scdScrRegTest( scd )
# reboot the system
reboot( scd )
if __name__ == "__main__":
main()

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Subproject commit 495584bd2f228af81934b23e4cf19648ab387fab
Subproject commit 26c3709786a4072625d7f3ebb9f2e52d798a3ba0