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An Emulator for MicroBlaze INA
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An Emulator for MicroBlaze INA
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:copyright: Copyright (c) 2010 Jian Luo
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:copyright: Copyright (c) 2010 Jian Luo
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:author-email: jian.luo.cn(at_)gmail.com
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:author-email: jian.luo.cn(at_)gmail.com
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:license: LGPL, see LICENSE for details
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:license: LGPL, see LICENSE for details
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:revision: $Id: emulator.py 3 2010-11-21 07:17:00Z rockee $
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:revision: $Id: emulator.py 6 2010-11-21 23:18:44Z rockee $
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"""
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"""
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from random import randrange
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from random import randrange
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from myhdl import *
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from myhdl import *
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_max = _signed32(__max)
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_max = _signed32(__max)
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_min = _signed32(__min)
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_min = _signed32(__min)
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class MyBlazeEmulator(object):
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class MyBlazeEmulator(object):
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def __init__(self, filename='rom.vmem'):
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def __init__(self, filename='rom.vmem', max_steps=1000):
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ram = read_vmem(filename)
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ram = read_vmem(filename)
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print 'size=%d' % len(ram)
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print 'size=%d' % len(ram)
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fetch(ram, max_steps=1000)
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fetch(ram, max_steps=max_steps)
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def addi(d, a, i, k, c, r, m, **kw):
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def addi(d, a, i, k, c, r, m, **kw):
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x = _signed32(r[a]) + _signed32(i) + (bool(c) & m[0])
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x = _signed32(r[a]) + _signed32(i) + (bool(c) & m[0])
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r[d] = _signed32(x)
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r[d] = _signed32(x)
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m[0] = m[0] if k else not (_min <= x <= _max)
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m[0] = m[0] if k else not (_min <= x <= _max)
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loadi(i=r[b], r=r, **kw)
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loadi(i=r[b], r=r, **kw)
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def storei(d, a, i, op, r, ram, **kw):
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def storei(d, a, i, op, r, ram, **kw):
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addr = r[a] + i
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addr = r[a] + i
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if addr<0:
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if addr<0:
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# UART Emulation
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if addr == -64:
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if addr == -64:
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sys.stdout.write(chr(r[d] & 0xff))
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sys.stdout.write(chr(r[d] & 0xff))
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sys.stdout.flush()
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sys.stdout.flush()
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#else:
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#else:
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#print 'store@%#x <- r[%d]=%d' % (addr&_umax, d, r[d])
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#print 'store@%#x <- r[%d]=%d' % (addr&_umax, d, r[d])
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import sys
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import sys
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if __name__ == '__main__':
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if __name__ == '__main__':
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MyBlazeEmulator(sys.argv[1])
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MyBlazeEmulator(sys.argv[1], max_steps=2000)
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### EOF ###
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### EOF ###
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# vim:smarttab:sts=4:ts=4:sw=4:et:ai:tw=80:
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# vim:smarttab:sts=4:ts=4:sw=4:et:ai:tw=80:
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No newline at end of file
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No newline at end of file
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