rename dir

Signed-off-by: Nico Schottelius <nico@nico-notebook.schottelius.org>

netfpga/minip4/sw/CLI/p4_regs_api.py

@@ -0,0 +1,90 @@
+#!/usr/bin/env python
+
+#
+# Copyright (c) 2015 University of Cambridge
+# All rights reserved.
+#
+# This software was developed by Stanford University and the University of Cambridge Computer Laboratory 
+# under National Science Foundation under Grant No. CNS-0855268,
+# the University of Cambridge Computer Laboratory under EPSRC INTERNET Project EP/H040536/1 and
+# by the University of Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-11-C-0249 ("MRC2"), 
+# as part of the DARPA MRC research programme.
+#
+# @NETFPGA_LICENSE_HEADER_START@
+#
+# Licensed to NetFPGA C.I.C. (NetFPGA) under one or more contributor
+# license agreements.  See the NOTICE file distributed with this work for
+# additional information regarding copyright ownership.  NetFPGA licenses this
+# file to you under the NetFPGA Hardware-Software License, Version 1.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at:
+#
+#   http://www.netfpga-cic.org
+#
+# Unless required by applicable law or agreed to in writing, Work distributed
+# under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+# CONDITIONS OF ANY KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations under the License.
+#
+# @NETFPGA_LICENSE_HEADER_END@
+#
+
+from NFTest import *
+import sys, os, re, json
+from fcntl import *
+from ctypes import *
+from collections import OrderedDict
+
+# Loading the SUME shared library
+print "loading libsume.."
+lib_path=os.path.join(os.environ['SUME_FOLDER'],'lib','sw','std','hwtestlib','libsume.so')
+libsume=cdll.LoadLibrary(lib_path)
+
+# argtypes for the functions called from  C
+libsume.regread.argtypes = [c_uint]
+libsume.regwrite.argtypes= [c_uint, c_uint]
+
+EXTERN_DEFINES_FILE = os.path.expandvars("$P4_PROJECT_DIR/sw/CLI/SimpleSumeSwitch_extern_defines.json")
+
+ERROR_CODE = -1
+
+"""
+Read the SimpleSumeSwitch_reg_defines.txt file 
+"""
+def read_extern_defines():
+    with open(EXTERN_DEFINES_FILE) as f:
+        p4_externs = json.load(f)
+    return p4_externs
+
+def get_address(reg_name, index):
+    global PX_EXTERNS
+    if reg_name not in P4_EXTERNS.keys() and 'control_width' not in P4_EXTERNS[reg_name].keys() and P4_EXTERNS[reg_name]['control_width'] > 0:
+        print >> sys.stderr, "ERROR: {0} is not a recognized register name".format(reg_name)
+        return ERROR_CODE
+    addressable_depth = 2**P4_EXTERNS[reg_name]['control_width']
+    if index >=  addressable_depth or index < 0:
+        print >> sys.stderr, "ERROR: cannot access {0}[{1}], index out of bounds".format(reg_name, index)
+        return ERROR_CODE
+    return P4_EXTERNS[reg_name]['base_addr'] + index
+
+# P4_EXTERNS is indexed by prefix_name
+P4_EXTERNS = read_extern_defines()
+
+#####################
+### API Functions ###
+#####################
+
+def reg_read(reg_name, index):
+    address = get_address(reg_name, index)
+    if address == ERROR_CODE:
+        return ERROR_CODE
+#    print "reading address : {0}".format(hex(address)) 
+    return libsume.regread(address)
+
+def reg_write(reg_name, index, val):
+    address = get_address(reg_name, index)
+    if address == ERROR_CODE:
+        return ERROR_CODE
+#    print "writing address : {0}".format(hex(address)) 
+    return libsume.regwrite(address, val)
+