arch, base, cpu, gpu, mem: Replace assert(0 or false with panic.

Neither assert(0) nor assert(false) give any hint as to why control
getting to them is bad, and their more descriptive versions,
assert(0 && "description") and assert(false && "description"), jury
rig assert to add an error message when the utility function panic()
already does that directly with better formatting options.

This change replaces that flavor of call to assert with panic, except
in the actual code which processes the formatting that panic uses (to
avoid infinitely recurring error handling), and in some *.sm files
since I don't know what rules those have to follow and don't want to
accidentaly break them.

Change-Id: I8addfbfaf77eaed94ec8191f2ae4efb477cefdd0
Reviewed-on: https://gem5-review.googlesource.com/c/14636
Reviewed-by: Brandon Potter <Brandon.Potter@amd.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>

style: [patch 1/22] use /r/3648/ to reorganize includes

style: remove trailing whitespace

Result of running 'hg m5style --skip-all --fix-white -a'.

base: fix operator== for comparing EthAddr objects

this operator uses memcmp() to detect if two EthAddr object have the same
address, however memcmp() will return 0 if all bytes are equal. operator==
returns the return value of memcmp() to indicate whether or not two
address are equal. this is incorrect as it will always give the opposite of
the intended behavior. this patch fixes that problem.

base: fix some bugs in EthAddr

per the IEEE 802 spec:
1) fixed broadcast() to ensure that all bytes are equal to 0xff.
2) fixed unicast() to ensure that bit 0 of the first byte is equal to 0
3) fixed multicast() to ensure that bit 0 of the first byte is equal to 1, and
that it is not a broadcast.

also the constructors in EthAddr are fixed so that all bytes of data are
initialized.

base: Add support for ipv6 into inet.hh/inet.cc

Inet: Remove the SackRange and its use

This patch aims to simplify the use of the Range class before
introducing a more elaborate AddrRegion to replace the AddrRange. The
SackRange is the only use of the range class besides address ranges,
and the removal of this use makes for an easier modification of the
range class.

The functionlity that is removed with this patch is not used anywhere
throughout the code base.

GCC: Get everything working with gcc 4.6.1.

And by "everything" I mean all the quick regressions.

Params: Print the IP components in the right order.

Make commenting on close namespace brackets consistent.

Ran all the source files through 'perl -pi' with this script:

s|\s*(};?\s*)?/\*\s*(end\s*)?namespace\s*(\S+)\s*\*/(\s*})?|} // namespace $3|;
s|\s*};?\s*//\s*(end\s*)?namespace\s*(\S+)\s*|} // namespace $2\n|;
s|\s*};?\s*//\s*(\S+)\s*namespace\s*|} // namespace $1\n|;

Also did a little manual editing on some of the arch/*/isa_traits.hh files
and src/SConscript.

Copyright: Add AMD copyright to the param changes I just made.

Params: Add parameter types for IP addresses in various forms.

New parameter forms are:
IP address in the format "a.b.c.d" where a-d are from decimal 0 to 255.
IP address with netmask which is an IP followed by "/n" where n is a netmask
length in bits from decimal 0 to 32 or by "/e.f.g.h" where e-h are from
decimal 0 to 255 and which is all 1 bits followed by all 0 bits when
represented in binary. These can also be specified as an integral IP and
netmask passed in separately.
IP address with port which is an IP followed by ":p" where p is a port index
from decimal 0 to 65535. These can also be specified as an integral IP and
port value passed in separately.

build: fix compile problems pointed out by gcc 4.4

includes: sort includes again

types: Move stuff for global types into src/base/types.hh

INET: Add functions to header types to get offset in packet and start of payload; add function to split packet at last known header

Updated Authors from bk prs info

New directory structure:
- simulator source now in 'src' subdirectory
- imported files from 'ext' repository
- support building in arbitrary places, including
outside of the source tree. See comment at top
of SConstruct file for more details.
Regression tests are temporarily disabled; that
syetem needs more extensive revisions.

SConstruct:
Update for new directory structure.
Modify to support build trees that are not subdirectories
of the source tree. See comment at top of file for
more details.
Regression tests are temporarily disabled.
src/arch/SConscript:
src/arch/isa_parser.py:
src/python/SConscript:
Update for new directory structure.