SConscript revision 2155
13546Sgblack@eecs.umich.edu# -*- mode:python -*- 23546Sgblack@eecs.umich.edu 33546Sgblack@eecs.umich.edu# Copyright (c) 2006 The Regents of The University of Michigan 43546Sgblack@eecs.umich.edu# All rights reserved. 53546Sgblack@eecs.umich.edu# 63546Sgblack@eecs.umich.edu# Redistribution and use in source and binary forms, with or without 73546Sgblack@eecs.umich.edu# modification, are permitted provided that the following conditions are 83546Sgblack@eecs.umich.edu# met: redistributions of source code must retain the above copyright 93546Sgblack@eecs.umich.edu# notice, this list of conditions and the following disclaimer; 103546Sgblack@eecs.umich.edu# redistributions in binary form must reproduce the above copyright 113546Sgblack@eecs.umich.edu# notice, this list of conditions and the following disclaimer in the 123546Sgblack@eecs.umich.edu# documentation and/or other materials provided with the distribution; 133546Sgblack@eecs.umich.edu# neither the name of the copyright holders nor the names of its 143546Sgblack@eecs.umich.edu# contributors may be used to endorse or promote products derived from 153546Sgblack@eecs.umich.edu# this software without specific prior written permission. 163546Sgblack@eecs.umich.edu# 173546Sgblack@eecs.umich.edu# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 183546Sgblack@eecs.umich.edu# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 193546Sgblack@eecs.umich.edu# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 203546Sgblack@eecs.umich.edu# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 213546Sgblack@eecs.umich.edu# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 223546Sgblack@eecs.umich.edu# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 233546Sgblack@eecs.umich.edu# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 243546Sgblack@eecs.umich.edu# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 253546Sgblack@eecs.umich.edu# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 263546Sgblack@eecs.umich.edu# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 273546Sgblack@eecs.umich.edu# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 283546Sgblack@eecs.umich.edu 293546Sgblack@eecs.umich.eduimport os.path 303546Sgblack@eecs.umich.edu 314202Sbinkertn@umich.edu# Import build environment variable from SConstruct. 323546Sgblack@eecs.umich.eduImport('env') 334202Sbinkertn@umich.edu 344202Sbinkertn@umich.edu# Right now there are no source files immediately in this directory 354202Sbinkertn@umich.edusources = [] 363546Sgblack@eecs.umich.edu 375192Ssaidi@eecs.umich.edu################################################################# 385192Ssaidi@eecs.umich.edu# 395192Ssaidi@eecs.umich.edu# ISA "switch header" generation. 404202Sbinkertn@umich.edu# 414202Sbinkertn@umich.edu# Auto-generate arch headers that include the right ISA-specific 424202Sbinkertn@umich.edu# header based on the setting of THE_ISA preprocessor variable. 435406Ssaidi@eecs.umich.edu# 444202Sbinkertn@umich.edu################################################################# 454202Sbinkertn@umich.edu 464202Sbinkertn@umich.edu# List of headers to generate 474202Sbinkertn@umich.eduisa_switch_hdrs = Split(''' 484202Sbinkertn@umich.edu isa_traits.hh 495192Ssaidi@eecs.umich.edu ''') 505795Ssaidi@eecs.umich.edu 515795Ssaidi@eecs.umich.edu# Generate the header. target[0] is the full path of the output 525795Ssaidi@eecs.umich.edu# header to generate. 'source' is a dummy variable, since we get the 53# list of ISAs from env['ALL_ISA_LIST']. 54def gen_switch_hdr(target, source, env): 55 fname = str(target[0]) 56 basename = os.path.basename(fname) 57 f = open(fname, 'w') 58 f.write('#include "arch/isa_specific.hh"\n') 59 cond = '#if' 60 for isa in env['ALL_ISA_LIST']: 61 f.write('%s THE_ISA == %s_ISA\n#include "arch/%s/%s"\n' 62 % (cond, isa.upper(), isa, basename)) 63 cond = '#elif' 64 f.write('#else\n#error "THE_ISA not set"\n#endif\n') 65 f.close() 66 return 0 67 68# String to print when generating header 69def gen_switch_hdr_string(target, source, env): 70 return "Generating ISA switch header " + str(target[0]) 71 72# Build SCons Action object. 'varlist' specifies env vars that this 73# action depdnds on; when env['ALL_ISA_LIST'] changes these actions 74# should get re-executed. 75switch_hdr_action = Action(gen_switch_hdr, gen_switch_hdr_string, 76 varlist=['ALL_ISA_LIST']) 77 78# Instantiate actions for each header 79for hdr in isa_switch_hdrs: 80 env.Command(hdr, [], switch_hdr_action) 81 82################################################################# 83# 84# Include architecture-specific files. 85# 86################################################################# 87 88# 89# Build a SCons scanner for ISA files 90# 91import SCons.Scanner 92 93def ISAScan(): 94 return SCons.Scanner.Classic("ISAScan", 95 "$ISASUFFIXES", 96 "SRCDIR", 97 '^[ \t]*##[ \t]*include[ \t]*"([^>"]+)"') 98 99def ISAPath(env, dir, target=None, source=None, a=None): 100 return (Dir(env['SRCDIR']), Dir('.')) 101 102iscan = Scanner(function = ISAScan().scan, skeys = [".isa", ".ISA"], 103 path_function = ISAPath) 104env.Append(SCANNERS = iscan) 105 106# 107# Now create a Builder object that uses isa_parser.py to generate C++ 108# output from the ISA description (*.isa) files. 109# 110 111# Convert to File node to fix path 112isa_parser = File('isa_parser.py') 113cpu_models_file = File('#m5/cpu/cpu_models.py') 114 115# This sucks in the defintions of the CpuModel objects. 116execfile(cpu_models_file.srcnode().abspath) 117 118# Several files are generated from the ISA description. 119# We always get the basic decoder and header file. 120isa_desc_gen_files = Split('decoder.cc decoder.hh') 121# We also get an execute file for each selected CPU model. 122isa_desc_gen_files += [CpuModel.dict[cpu].filename 123 for cpu in env['CPU_MODELS']] 124 125# The emitter patches up the sources & targets to include the 126# autogenerated files as targets and isa parser itself as a source. 127def isa_desc_emitter(target, source, env): 128 return (isa_desc_gen_files, [isa_parser, cpu_models_file] + source) 129 130# Pieces are in place, so create the builder. 131isa_desc_builder = Builder(action='$SOURCES $TARGET.dir $CPU_MODELS', 132 source_scanner = iscan, 133 emitter = isa_desc_emitter) 134 135env.Append(BUILDERS = { 'ISADesc' : isa_desc_builder }) 136 137# 138# Now include other ISA-specific sources from the ISA subdirectories. 139# 140 141isa = env['TARGET_ISA'] # someday this may be a list of ISAs 142 143# Let the target architecture define what additional sources it needs 144sources += SConscript(os.path.join(isa, 'SConscript'), 145 exports = 'env', duplicate = False) 146 147Return('sources') 148