1# Copyright (c) 2015 Advanced Micro Devices, Inc. 2# All rights reserved 3# 4# Redistribution and use in source and binary forms, with or without 5# modification, are permitted provided that the following conditions are 6# met: redistributions of source code must retain the above copyright 7# notice, this list of conditions and the following disclaimer; 8# redistributions in binary form must reproduce the above copyright --- 38 unchanged lines hidden (view full) --- 47 with open(joinpath(*path), 'a') as f: 48 f.write(str(contents)) 49 50def replace_tree(path): 51 if isdir(path): 52 rmtree(path) 53 mkdir(path) 54 |
55def config_filesystem(system, options = None): 56 """ This function parses the system object to create the pseudo file system 57 @param system: The system to create the config for 58 @param options: An optional argument which contains an Options.py options 59 object. This is useful if when use se.py and will set the L2 cache 60 size and the clock in /proc/cpuinfo if provided. 61 62 First, this function walks the system object to find all CPUs. 63 Then, this function creates the following files with the CPU information 64 - /proc/cpuinfo which contains the clock and the L2 size 65 (assumes all L2s private and the same size) 66 - /proc/stat simply lists all CPUs 67 - /sys/devices/system/cpu/online and /sys/devices/system/cpu/possible 68 These files list all of the CPUs in this system. 69 - /tmp 70 71 These files are created in the `fs` directory in the outdir path. 72 """ |
73 fsdir = joinpath(m5.options.outdir, 'fs') 74 replace_tree(fsdir) 75 76 # Set up /proc 77 procdir = joinpath(fsdir, 'proc') 78 mkdir(procdir) 79 |
80 cpus = [obj for obj in system.descendants() if isinstance(obj, BaseCPU)] 81 82 cpu_clock = 0 |
83 if hasattr(options, 'cpu_clock'): |
84 cpu_clock = toFrequency(options.cpu_clock) / mega |
85 |
86 l2_size = 0 |
87 if hasattr(options, 'l2_size'): |
88 l2_size = toMemorySize(options.l2_size) / kibi |
89 |
90 for i,cpu in enumerate(cpus): 91 one_cpu = 'processor : {proc}\n' + \ |
92 'vendor_id : Generic\n' + \ 93 'cpu family : 0\n' + \ 94 'model : 0\n' + \ 95 'model name : Generic\n' + \ 96 'stepping : 0\n' + \ |
97 'cpu MHz : {clock:0.3f}\n' + \ 98 'cache size: : {l2_size}K\n' + \ |
99 'physical id : 0\n' + \ |
100 'siblings : {num_cpus}\n' + \ 101 'core id : {proc}\n' + \ 102 'cpu cores : {num_cpus}\n' + \ |
103 'fpu : yes\n' + \ 104 'fpu exception : yes\n' + \ 105 'cpuid level : 1\n' + \ 106 'wp : yes\n' + \ 107 'flags : fpu\n' + \ |
108 'cache alignment : {cacheline_size}\n' + \ |
109 '\n' |
110 one_cpu = one_cpu.format(proc = i, num_cpus = len(cpus), 111 # Note: it would be nice to use cpu.clock, but it hasn't 112 # been finalized yet since m5.instantiate() isn't done. 113 clock = cpu_clock, 114 # Note: this assumes the L2 is private to each core 115 l2_size = l2_size, 116 cacheline_size=system.cache_line_size.getValue()) |
117 file_append((procdir, 'cpuinfo'), one_cpu) 118 119 file_append((procdir, 'stat'), 'cpu 0 0 0 0 0 0 0\n') |
120 for i in xrange(len(cpus)): |
121 file_append((procdir, 'stat'), 'cpu%d 0 0 0 0 0 0 0\n' % i) 122 123 # Set up /sys 124 sysdir = joinpath(fsdir, 'sys') 125 mkdir(sysdir) 126 127 # Set up /sys/devices/system/cpu 128 cpudir = joinpath(sysdir, 'devices', 'system', 'cpu') 129 makedirs(cpudir) 130 |
131 file_append((cpudir, 'online'), '0-%d' % (len(cpus) - 1)) 132 file_append((cpudir, 'possible'), '0-%d' % (len(cpus) - 1)) |
133 134 # Set up /tmp 135 tmpdir = joinpath(fsdir, 'tmp') 136 replace_tree(tmpdir) 137 |
138 if options and hasattr(options, 'chroot'): 139 chroot = os.path.expanduser(options.chroot) 140 else: 141 chroot = '/' 142 system.redirect_paths = _redirect_paths(chroot) 143 |
144def register_node(cpu_list, mem, node_number): 145 nodebasedir = joinpath(m5.options.outdir, 'fs', 'sys', 'devices', 146 'system', 'node') 147 148 nodedir = joinpath(nodebasedir,'node%d' % node_number) 149 makedirs(nodedir) 150 151 file_append((nodedir, 'cpumap'), hex_mask(cpu_list)) --- 39 unchanged lines hidden (view full) --- 191 192 # Since cache size = number of indices * associativity * block size 193 num_sets = toMemorySize(size) / int(assoc) * int(line_size) 194 195 file_append((indexdir, 'number_of_sets'), num_sets) 196 file_append((indexdir, 'physical_line_partition'), '1') 197 file_append((indexdir, 'shared_cpu_map'), hex_mask(cpus)) 198 |
199def _redirect_paths(chroot): |
200 # Redirect filesystem syscalls from src to the first matching dests 201 redirect_paths = [RedirectPath(app_path = "/proc", 202 host_paths = ["%s/fs/proc" % m5.options.outdir]), 203 RedirectPath(app_path = "/sys", 204 host_paths = ["%s/fs/sys" % m5.options.outdir]), 205 RedirectPath(app_path = "/tmp", 206 host_paths = ["%s/fs/tmp" % m5.options.outdir]), 207 RedirectPath(app_path = "/", 208 host_paths = ["%s" % chroot])] 209 return redirect_paths |