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It is possible that operating system wants to shutdown the
lapic timer by writing timer's initial count to 0. This patch
adds a check that the timer event is only scheduled if the
count is 0.
The patch also converts few of the panics related to the keyboard
to warnings since we are any way not interested in simulating the
keyboard.
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This patch addresses a number of smaller issues identified by the code
inspection utility cppcheck. There are a number of identified leaks in
the arm/linux/system.cc (although the function only get's called once
so it is not a major problem), a few deletes in dev/x86/i8042.cc that
were not array deletes, and sprintfs where the character array had one
element less than needed. In the IIC tags there was a function
allocating an array of longs which is in fact never used.
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This patch makes getAddrRanges const throughout the code base. There
is no reason why it should not be, and making it const prevents adding
any unintentional side-effects.
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This patch simplifies the address-range determination mechanism and
also unifies the naming across ports and devices. It further splits
the queries for determining if a port is snooping and what address
ranges it responds to (aiming towards a separation of
cache-maintenance ports and pure memory-mapped ports). Default
behaviours are such that most ports do not have to define isSnooping,
and master ports need not implement getAddrRanges.
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At the same time, rename the trace flags to debug flags since they
have broader usage than simply tracing. This means that
--trace-flags is now --debug-flags and --trace-help is now --debug-help
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Add checkpointing capability to the Intel 8254 timer, CMOS, I8042,
PS2 Keyboard and Mouse, I82094AA, I8237, I8254, I8259, and speaker
devices
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