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
33 # Import build environment variable from SConstruct.
36 # Right now there are no source files immediately in this directory
39 #################################################################
41 # ISA "switch header" generation.
43 # Auto-generate arch headers that include the right ISA-specific
44 # header based on the setting of THE_ISA preprocessor variable.
46 #################################################################
48 # List of headers to generate
49 isa_switch_hdrs = Split('''
66 # Generate the header. target[0] is the full path of the output
67 # header to generate. 'source' is a dummy variable, since we get the
68 # list of ISAs from env['ALL_ISA_LIST'].
69 def gen_switch_hdr(target, source, env):
70 fname = str(target[0])
71 basename = os.path.basename(fname)
73 f.write('#include "arch/isa_specific.hh"\n')
75 for isa in env['ALL_ISA_LIST']:
76 f.write('%s THE_ISA == %s_ISA\n#include "arch/%s/%s"\n'
77 % (cond, isa.upper(), isa, basename))
79 f.write('#else\n#error "THE_ISA not set"\n#endif\n')
83 # String to print when generating header
84 def gen_switch_hdr_string(target, source, env):
85 return "Generating ISA switch header " + str(target[0])
87 # Build SCons Action object. 'varlist' specifies env vars that this
88 # action depends on; when env['ALL_ISA_LIST'] changes these actions
89 # should get re-executed.
90 switch_hdr_action = Action(gen_switch_hdr, gen_switch_hdr_string,
91 varlist=['ALL_ISA_LIST'])
93 # Instantiate actions for each header
94 for hdr in isa_switch_hdrs:
95 env.Command(hdr, [], switch_hdr_action)
97 #################################################################
99 # Include architecture-specific files.
101 #################################################################
104 # Build a SCons scanner for ISA files
108 isa_scanner = SCons.Scanner.Classic("ISAScan",
111 r'^\s*##include\s+"([\w/.-]*)"')
113 env.Append(SCANNERS = isa_scanner)
116 # Now create a Builder object that uses isa_parser.py to generate C++
117 # output from the ISA description (*.isa) files.
120 # Convert to File node to fix path
121 isa_parser = File('isa_parser.py')
122 cpu_models_file = File('../cpu/cpu_models.py')
124 # This sucks in the defintions of the CpuModel objects.
125 execfile(cpu_models_file.srcnode().abspath)
127 # Several files are generated from the ISA description.
128 # We always get the basic decoder and header file.
129 isa_desc_gen_files = Split('decoder.cc decoder.hh')
130 # We also get an execute file for each selected CPU model.
131 isa_desc_gen_files += [CpuModel.dict[cpu].filename
132 for cpu in env['CPU_MODELS']]
134 # Also include the CheckerCPU as one of the models if it is being
135 # enabled via command line.
136 if env['USE_CHECKER']:
137 isa_desc_gen_files += [CpuModel.dict['CheckerCPU'].filename]
139 # The emitter patches up the sources & targets to include the
140 # autogenerated files as targets and isa parser itself as a source.
141 def isa_desc_emitter(target, source, env):
142 return (isa_desc_gen_files, [isa_parser, cpu_models_file] + source)
144 # Pieces are in place, so create the builder.
145 python = sys.executable # use same Python binary used to run scons
147 # Also include the CheckerCPU as one of the models if it is being
148 # enabled via command line.
149 if env['USE_CHECKER']:
150 isa_desc_builder = Builder(action=python + ' $SOURCES $TARGET.dir $CPU_MODELS CheckerCPU',
151 emitter = isa_desc_emitter)
153 isa_desc_builder = Builder(action=python + ' $SOURCES $TARGET.dir $CPU_MODELS',
154 emitter = isa_desc_emitter)
156 env.Append(BUILDERS = { 'ISADesc' : isa_desc_builder })
159 # Now include other ISA-specific sources from the ISA subdirectories.
162 isa = env['TARGET_ISA'] # someday this may be a list of ISAs
164 # Let the target architecture define what additional sources it needs
165 sources += SConscript(os.path.join(isa, 'SConscript'), exports = 'env')