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import argparse
import libfdt
import os
import sys
# Format: FEATURE : (dtb property, condition_operator, condition_value)
# If dtb property is None, then the item is always on
#
# If the condition_operator is None, then enable if it exists for existance
#
# If the condition_operator is '!', and condition_value is None then enable if
# if is not defined
#
# Otherwise 'condition' and value are evaluated by type.
#
# If the condition is = then any value of condition_values will set it
# If the condition is ! then no value of condition_values will set it
microblaze_tune_features = {
'microblaze' : (None, None, None),
'bigendian': ('xlnx,endianness', '!', 1),
'64-bit' : ('xlnx,data-size', '=', 64),
'barrel-shift': ('xlnx,use-barrel', '=', 1),
'pattern-compare': ('xlnx,use-pcmp-instr', '=', 1),
'reorder' : ('xlnx,use-reorder-instr', '!', 0),
'frequency-optimized': ('xlnx,area-optimized', '=', 2),
'multiply-low': ('xlnx,use-hw-mul', '=', 1),
'multiply-high': ('xlnx,use-hw-mul', '=', 2),
'divide-hard': ('xlnx,use-div', '=', 1),
'fpu-soft': ('xlnx,use-fpu', '!', [1,2]),
'fpu-hard': ('xlnx,use-fpu', '=', 1),
'fpu-hard-extended':('xlnx,use-fpu', '=', 2),
}
def processProperties(fdt, node):
TUNE_FEATURES = []
for feature in microblaze_tune_features:
(property, cop, cvalue) = microblaze_tune_features[feature]
if not property:
TUNE_FEATURES.append(feature)
# Special processing to get the version
if feature == "microblaze":
ver = microblazeVersion(fdt, node)
if ver:
TUNE_FEATURES.append(ver)
continue
prop_value = fdt.getprop( node, property, libfdt.QUIET_NOTFOUND)
if not prop_value or prop_value == -1:
if cop == '!':
if not cvalue:
TUNE_FEATURES.append(ver)
continue
continue
# If no operator
if not cop or (cop == '=' and not cvalue):
TUNE_FEATURES.append(feature)
continue
ctype = type(cvalue)
if ctype == type(list()):
val_list = cvalue
else:
val_list = [ cvalue ]
result = False
for value in val_list:
ctype = type(value)
if ctype == type(int()):
val = prop_value.as_uint32()
else:
raise TypeError('Unknown type %s' % ctype)
if value == val:
result = True
break
else:
result = False
if (cop == '!' and result == False) or \
(cop == '=' and result == True):
TUNE_FEATURES.append(feature)
return TUNE_FEATURES
def microblazeVersion(fdt, node):
version = None
val = fdt.getprop( node, 'model', libfdt.QUIET_NOTFOUND)
if val and val != -1:
val = fdt.getprop( node, 'model' ).as_str()
version = val[val.find('microblaze,') + 11:]
if version.startswith('8'):
# Strip 8.xx.y, to just 8.xx
v = version.split('.')
version = '.'.join(v[0:2])
version = 'v' + version
return version
def MicroblazeConfig(dtbfile, out):
fdt = libfdt.Fdt(open(dtbfile, mode='rb').read())
cpu = -1
while (True):
cpu = cpu + 1
try:
node = fdt.path_offset('/cpus/cpu@%d' % cpu)
try:
prop = fdt.getprop( node, 'compatible' )
prop_val = prop[:-1].decode('utf-8').split('\x00')
microblaze = False
for val in prop_val:
if "microblaze" in val:
microblaze = True
break
if not microblaze:
continue
# Construct TUNE_FEATURE here
TUNE_FEATURES = processProperties(fdt, node)
out.write('AVAILTUNES += "microblaze-cpu%s"\n' % (cpu))
out.write('TUNE_FEATURES:tune-microblaze-cpu%s = "%s"\n' % (cpu, ' '.join(TUNE_FEATURES)))
out.write('PACKAGE_EXTRA_ARCHS:tune-microblaze-cpu%s = "${TUNE_PKGARCH}"\n' % (cpu))
except Exception as e:
sys.stderr.write("Exception looking at properties: %s\n" % e)
continue
except Exception as e:
# CPUs SHOULD be consecutive w/o gaps, so no more to search
break
if __name__ == "__main__":
parser = argparse.ArgumentParser(description='Generate MicroBlaze TUNE_FEATURES')
parser.add_argument('-d', '--dtb-file', action='store',
help='DTB file to process')
parser.add_argument('-o', '--output', action='store',
help='Output file to store TUNE_FEATURE settings')
args = parser.parse_args()
if not args.dtb_file:
sys.stderr.write('ERROR: You must specify a DTB_FILE to process.\n')
sys.exit(1)
outputf = sys.stdout
if args.output:
if os.path.exists(args.output):
sys.stderr.write('ERROR: The output file "%s" exists!\n' % args.output)
sys.exit(1)
outputf = open(args.output, 'w')
MicroblazeConfig(args.dtb_file, outputf)
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