3 # Copyright (c) 2006 The Regents of The University of Michigan
6 # Redistribution and use in source and binary forms, with or without
7 # modification, are permitted provided that the following conditions are
8 # met: redistributions of source code must retain the above copyright
9 # notice, this list of conditions and the following disclaimer;
10 # redistributions in binary form must reproduce the above copyright
11 # notice, this list of conditions and the following disclaimer in the
12 # documentation and/or other materials provided with the distribution;
13 # neither the name of the copyright holders nor the names of its
14 # contributors may be used to endorse or promote products derived from
15 # this software without specific prior written permission.
17 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 # Authors: Steve Reinhardt
35 #################################################################
37 # ISA "switch header" generation.
39 # Auto-generate arch headers that include the right ISA-specific
40 # header based on the setting of THE_ISA preprocessor variable.
42 #################################################################
44 # List of headers to generate
45 isa_switch_hdrs = Split('''
65 # Set up this directory to support switching headers
66 make_switching_dir('arch', isa_switch_hdrs, env)
68 #################################################################
70 # Include architecture-specific files.
72 #################################################################
75 # Build a SCons scanner for ISA files
79 isa_scanner = SCons.Scanner.Classic("ISAScan",
82 r'^\s*##include\s+"([\w/.-]*)"')
84 env.Append(SCANNERS = isa_scanner)
87 # Now create a Builder object that uses isa_parser.py to generate C++
88 # output from the ISA description (*.isa) files.
91 # Convert to File node to fix path
92 isa_parser = File('isa_parser.py')
93 cpu_models_file = File('../cpu/cpu_models.py')
95 # This sucks in the defintions of the CpuModel objects.
96 execfile(cpu_models_file.srcnode().abspath)
98 # Several files are generated from the ISA description.
99 # We always get the basic decoder and header file.
100 isa_desc_gen_files = [ 'decoder.cc', 'decoder.hh' ]
101 # We also get an execute file for each selected CPU model.
102 isa_desc_gen_files += [CpuModel.dict[cpu].filename
103 for cpu in env['CPU_MODELS']]
105 # Also include the CheckerCPU as one of the models if it is being
106 # enabled via command line.
107 if env['USE_CHECKER']:
108 isa_desc_gen_files += [CpuModel.dict['CheckerCPU'].filename]
110 # The emitter patches up the sources & targets to include the
111 # autogenerated files as targets and isa parser itself as a source.
112 def isa_desc_emitter(target, source, env):
113 return (isa_desc_gen_files, [isa_parser, cpu_models_file] + source)
115 # Pieces are in place, so create the builder.
116 python = sys.executable # use same Python binary used to run scons
118 # Also include the CheckerCPU as one of the models if it is being
119 # enabled via command line.
120 if env['USE_CHECKER']:
121 isa_desc_builder = Builder(action=python + ' $SOURCES $TARGET.dir $CPU_MODELS CheckerCPU',
122 emitter = isa_desc_emitter)
124 isa_desc_builder = Builder(action=python + ' $SOURCES $TARGET.dir $CPU_MODELS',
125 emitter = isa_desc_emitter)
127 env.Append(BUILDERS = { 'ISADesc' : isa_desc_builder })