[MIPS] Support for building tests for MIPS

tests/egyptian_cotton/nacl.scons

 # -*- python -*-
 # Copyright (c) 2012 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 Import('env')
 
 egyptian_cotton_nexe = env.ComponentProgram('egyptian_cotton',
                                             'egyptian_cotton.c',
                                             EXTRA_LIBS=['${PTHREAD_LIBS}',
@@ skipping 56 matching lines @@
 
 if env.Bit('target_arm'):
   # so far, only linux.
   # The arm-hw-bot was actually clocked at successfully doing 8191,
   # though it gets pretty resource-starved near the top and might
   # crash if anything else is being done on the bot, and takes a
   # really long time.  Limit to 7000 since that's more than 4096
   # but not enough to take too long.
   high_thread_count_nthreads = 7000
   platform_limits_known = True
+elif env.Bit('target_mips32'):
+  # Based on MIPS Malta 74Kc board.
+  high_thread_count_nthreads = 3500
+  platform_limits_known = True
 elif env.Bit('target_x86'):
   trusted_env = env.get('TRUSTED_ENV')
   if trusted_env:
     platform_limits_known = True
     if trusted_env.Bit('linux'):
       high_thread_count_nthreads = 8180
     elif trusted_env.Bit('mac'):
       # A value of 2558 worked on OS X 10.5 (Leopard).
       # This had to be reduced to 2556 to pass on OS X 10.6 (Snow Leopard).
       # It then had to be reduced to 2044 to pass on OS X 10.7 (Lion).
@@ skipping 39 matching lines @@
 def ThreadTestNode(name, args):
   return env.CommandSelLdrTestNacl(name + '.out',
                                    egyptian_cotton_nexe,
                                    size='large',
                                    args=args)
 
 nodes = [ ThreadTestNode(name, args) for name, args in tests ]
 
 for p, n in zip(tests, nodes):
   env.AddNodeToTestSuite(n, ['medium_tests', 'sel_ldr_tests'], 'run_' + p[0])