diff options
Diffstat (limited to 'arch/SConscript')
| -rw-r--r-- | arch/SConscript | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/arch/SConscript b/arch/SConscript new file mode 100644 index 000000000..51f6cc023 --- /dev/null +++ b/arch/SConscript @@ -0,0 +1,146 @@ +# -*- 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. + +import os.path + +# Import build environment variable from SConstruct. +Import('env') + +# Right now there are no source files immediately in this directory +sources = [] + +################################################################# +# +# 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(''' + isa_traits.hh + ''') + +# Generate the header. target[0] is the full path of the output +# header to generate. 'source' is a dummy variable, since we get the +# list of ISAs from env['ALL_ISA_LIST']. +def gen_switch_hdr(target, source, env): + fname = str(target[0]) + basename = os.path.basename(fname) + f = open(fname, 'w') + f.write('#include "arch/isa_specific.hh"\n') + cond = '#if' + for isa in env['ALL_ISA_LIST']: + f.write('%s THE_ISA == %s_ISA\n#include "arch/%s/%s"\n' + % (cond, isa.upper(), isa, basename)) + cond = '#elif' + f.write('#else\n#error "THE_ISA not set"\n#endif\n') + f.close() + return 0 + +# String to print when generating header +def gen_switch_hdr_string(target, source, env): + return "Generating ISA switch header " + str(target[0]) + +# Build SCons Action object. 'varlist' specifies env vars that this +# action depdnds on; when env['ALL_ISA_LIST'] changes these actions +# should get re-executed. +switch_hdr_action = Action(gen_switch_hdr, gen_switch_hdr_string, + varlist=['ALL_ISA_LIST']) + +# Instantiate actions for each header +for hdr in isa_switch_hdrs: + env.Command(hdr, [], switch_hdr_action) + +################################################################# +# +# Include architecture-specific files. +# +################################################################# + +# +# Build a SCons scanner for ISA files +# +import SCons.Scanner + +def ISAScan(): + return SCons.Scanner.Classic("ISAScan", + "$ISASUFFIXES", + "SRCDIR", + '^[ \t]*##[ \t]*include[ \t]*"([^>"]+)"') + +def ISAPath(env, dir, target=None, source=None, a=None): + return (Dir(env['SRCDIR']), Dir('.')) + +iscan = Scanner(function = ISAScan().scan, skeys = [".isa", ".ISA"], + path_function = ISAPath) +env.Append(SCANNERS = iscan) + +# +# Now create a Builder object that uses isa_parser.py to generate C++ +# output from the ISA description (*.isa) files. +# + +# several files are generated from the ISA description +isa_desc_gen_files = Split(''' + decoder.cc + alpha_o3_exec.cc + fast_cpu_exec.cc + simple_cpu_exec.cc + full_cpu_exec.cc + decoder.hh + ''') + +# Convert to File node to fix path +isa_parser = File('isa_parser.py') + +# The emitter patches up the sources & targets to include the +# autogenerated files as targets and isa parser itself as a source. +def isa_desc_emitter(target, source, env): + return (isa_desc_gen_files, [isa_parser] + source) + +# Pieces are in place, so create the builder. +isa_desc_builder = Builder(action='${SOURCES[0]} ${SOURCES[1]} $TARGET.dir', + source_scanner = iscan, + emitter = isa_desc_emitter) + +env.Append(BUILDERS = { 'ISADesc' : isa_desc_builder }) + +# +# Now include other ISA-specific sources from the ISA subdirectories. +# + +isa = env['TARGET_ISA'] # someday this may be a list of ISAs + +# Let the target architecture define what additional sources it needs +sources += SConscript(os.path.join(isa, 'SConscript'), + exports = 'env', duplicate = False) + +Return('sources') |