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# -*- mode:python -*-
# Copyright (c) 2006 The Regents of The University of Michigan
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Steve Reinhardt
import sys
import os
import re
Import('*')
#################################################################
#
# ISA "switch header" generation.
#
# Auto-generate arch headers that include the right ISA-specific
# header based on the setting of THE_ISA preprocessor variable.
#
#################################################################
# List of headers to generate
isa_switch_hdrs = Split('''
decoder.hh
interrupts.hh
isa.hh
isa_traits.hh
kernel_stats.hh
locked_mem.hh
microcode_rom.hh
mmapped_ipr.hh
mt.hh
process.hh
pseudo_inst.hh
registers.hh
remote_gdb.hh
stacktrace.hh
tlb.hh
types.hh
utility.hh
vtophys.hh
''')
# Set up this directory to support switching headers
make_switching_dir('arch', isa_switch_hdrs, env)
if env['BUILD_GPU']:
gpu_isa_switch_hdrs = Split('''
gpu_decoder.hh
gpu_types.hh
''')
make_gpu_switching_dir('arch', gpu_isa_switch_hdrs, env)
#################################################################
#
# Include architecture-specific files.
#
#################################################################
#
# Build a SCons scanner for ISA files
#
import SCons.Scanner
isa_scanner = SCons.Scanner.Classic("ISAScan",
[".isa", ".ISA"],
"SRCDIR",
r'^\s*##include\s+"([\w/.-]*)"')
env.Append(SCANNERS = isa_scanner)
#
# Now create a Builder object that uses isa_parser.py to generate C++
# output from the ISA description (*.isa) files.
#
isa_parser = File('isa_parser.py')
# The emitter patches up the sources & targets to include the
# autogenerated files as targets and isa parser itself as a source.
def isa_desc_emitter(target, source, env):
# List the isa parser as a source.
source += [
isa_parser,
Value("ExecContext"),
]
# Specify different targets depending on if we're running the ISA
# parser for its dependency information, or for the generated files.
# (As an optimization, the ISA parser detects the useless second run
# and skips doing any work, if the first run was performed, since it
# always generates all its files). The way we track this in SCons is the
# <arch>_isa_outputs value in the environment (env). If it's unset, we
# don't know what the dependencies are so we ask for generated/inc.d to
# be generated so they can be acquired. If we know what they are, then
# it's because we've already processed inc.d and then claim that our
# outputs (targets) will be thus.
isa = env['TARGET_ISA']
key = '%s_isa_outputs' % isa
if key in env:
targets = [ os.path.join('generated', f) for f in env[key] ]
else:
targets = [ os.path.join('generated','inc.d') ]
def prefix(s):
return os.path.join(target[0].dir.up().abspath, s)
return [ prefix(t) for t in targets ], source
ARCH_DIR = Dir('.')
# import ply here because SCons screws with sys.path when performing actions.
import ply
def isa_desc_action_func(target, source, env):
# Add the current directory to the system path so we can import files
sys.path[0:0] = [ ARCH_DIR.srcnode().abspath ]
import isa_parser
# Skip over the ISA description itself and the parser to the CPU models.
models = [ s.get_contents() for s in source[2:] ]
parser = isa_parser.ISAParser(target[0].dir.abspath)
parser.parse_isa_desc(source[0].abspath)
isa_desc_action = MakeAction(isa_desc_action_func, Transform("ISA DESC", 1))
# Also include the CheckerCPU as one of the models if it is being
# enabled via command line.
isa_desc_builder = Builder(action=isa_desc_action, emitter=isa_desc_emitter)
env.Append(BUILDERS = { 'ISADesc' : isa_desc_builder })
# The ISA is generated twice: the first time to find out what it generates,
# and the second time to make scons happy by telling the ISADesc builder
# what it will make before it builds it.
def scan_isa_deps(target, source, env):
# Process dependency file generated by the ISA parser --
# add the listed files to the dependency tree of the build.
source = source[0]
archbase = source.dir.up().path
try:
depfile = open(source.abspath, 'r')
except:
print "scan_isa_deps: Can't open ISA deps file '%s' in %s" % \
(source.path,os.getcwd())
raise
# Scan through the lines
targets = {}
for line in depfile:
# Read the dependency line with the format
# <target file>: [ <dependent file>* ]
m = re.match(r'^\s*([^:]+\.([^\.:]+))\s*:\s*(.*)', line)
assert(m)
targ, extn = m.group(1,2)
deps = m.group(3).split()
files = [ targ ] + deps
for f in files:
targets[f] = True
# Eliminate unnecessary re-generation if we already generated it
env.Precious(os.path.join(archbase, 'generated', f))
files = [ os.path.join(archbase, 'generated', f) for f in files ]
if extn == 'cc':
Source(os.path.join(archbase,'generated', targ))
depfile.close()
env[env['TARGET_ISA'] + '_isa_outputs'] = targets.keys()
isa = env.ISADesc(os.path.join(archbase,'isa','main.isa'))
for t in targets:
env.Depends('#all-isas', isa)
env.Append(BUILDERS = {'ScanISA' :
Builder(action=MakeAction(scan_isa_deps,
Transform("NEW DEPS", 1)))})
DebugFlag('IntRegs')
DebugFlag('FloatRegs')
DebugFlag('CCRegs')
DebugFlag('MiscRegs')
CompoundFlag('Registers', [ 'IntRegs', 'FloatRegs', 'CCRegs', 'MiscRegs' ])
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