sim: Add gtoh/htog helpers that take an explicit endianness

Add helper functions to swap between guest byte order and host byte
order that take a guest endianness as a parameter. These functions are
called htog and htog to be consistent with the helper functions that
extract guest byte order from a compile time constant.

Change-Id: Ie6be7dfd3b7a58ad6bfb57b25be5f85b5f425929
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8201
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>

arm,sparc,x86,base,cpu,sim: Replace the Twin(32|64)_t types with.

Replace them with std::array<>s.

Change-Id: I76624c87a1cd9b21c386a96147a18de92b8a8a34
Reviewed-on: https://gem5-review.googlesource.com/6602
Maintainer: Gabe Black <gabeblack@google.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>

base: Add endianness conversion functions for std::array types.

These swap the endianness of each element within the array
individually.

They probably obsolute the Twin(32|64)_t types which I believe were
used for SPARC.

Change-Id: Ic389eb24bdcdc0081068b0c5a37abdf416f6c924
Reviewed-on: https://gem5-review.googlesource.com/6581
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>

style: [patch 3/22] reduce include dependencies in some headers

Used cppclean to help identify useless includes and removed them. This
involved erroneously included headers, but also cases where forward
declarations could have been used rather than a full include.

base: Redesign internal frame buffer handling

Currently, frame buffer handling in gem5 is quite ad hoc. In practice,
we pass around naked pointers to raw pixel data and expect consumers
to convert frame buffers using the (broken) VideoConverter.

This changeset completely redesigns the way we handle frame buffers
internally. In summary, it fixes several color conversion bugs, adds
support for more color formats (e.g., big endian), and makes the code
base easier to follow.

In the new world, gem5 always represents pixel data using the Pixel
struct when pixels need to be passed between different classes (e.g.,
a display controller and the VNC server). Producers of entire frames
(e.g., display controllers) should use the FrameBuffer class to
represent a frame.

Frame producers are expected to create one instance of the FrameBuffer
class in their constructors and register it with its consumers
once. Consumers are expected to check the dimensions of the frame
buffer when they consume it.

Conversion between the external representation and the internal
representation is supported for all common "true color" RGB formats of
up to 32-bit color depth. The external pixel representation is
expected to be between 1 and 4 bytes in either big endian or little
endian. Color channels are assumed to be contiguous ranges of bits
within each pixel word. The external pixel value is scaled to an 8-bit
internal representation using a floating multiplication to map it to
the entire 8-bit range.

sim: correct check for endianess

Committed by: Nilay Vaish <nilay@cs.wisc.edu>

gcc: Clean-up of non-C++0x compliant code, first steps

This patch cleans up a number of minor issues aiming to get closer to
compliance with the C++0x standard as interpreted by gcc and clang
(compile with std=c++0x and -pedantic-errors). In particular, the
patch cleans up enums where the last item was succeded by a comma,
namespaces closed by a curcly brace followed by a semi-colon, and the
use of the GNU-extension typeof (replaced by templated functions). It
does not address variable-length arrays, zero-size arrays, anonymous
structs, range expressions in switch statements, and the use of long
long. The generated CPU code also has a large number of issues that
remain to be fixed, mainly related to overflows in implicit constant
conversion (due to shifts).

Endianness: Make it easier to check the compiled in guest endianness.

It was technically possible but clumsy to determine what endianness a guest
was configured with using the state in byteswap.hh. This change makes that
information available more directly.

Also get rid of unused (and mildly redundant) ByteOrderDiffers constant.

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

We're using the static keyword improperly in some cases.

Make byteswap work correctly on Twin??_t types.

Merge zizzer:/bk/newmem
into zower.eecs.umich.edu:/eecshome/m5/newmem

src/arch/sparc/isa/formats/mem/util.isa:
src/arch/sparc/isa_traits.hh:
src/arch/sparc/system.cc:
Hand Merge

Merge zizzer.eecs.umich.edu:/bk/newmem
into ewok.(none):/home/gblack/m5/newmemo3

src/sim/byteswap.hh:
Hand Merge

Merge zeep.pool:/z/saidi/work/m5.newmem
into zeep.pool:/z/saidi/work/m5.suncc

fix compiling on x86/Solaris

make our code a little more standards compliant
pretty close to compiling w/ suns compiler

briefly:
add dummy return after panic()/fatal()
split out flags by compiler vendor
include cstring and cmath where appropriate
use std namespace for string ops

SConstruct:
Add code to detect compiler and choose cflags based on detected compiler
Fix zlib check to work with suncc
src/SConscript:
split out flags by compiler vendor
src/arch/sparc/isa/decoder.isa:
use correct namespace for sqrt
src/arch/sparc/isa/formats/basic.isa:
add dummy return around panic
src/arch/sparc/isa/formats/integerop.isa:
use correct namespace for stringops
src/arch/sparc/isa/includes.isa:
include cstring and cmath where appropriate
src/arch/sparc/isa_traits.hh:
remove dangling comma
src/arch/sparc/system.cc:
dummy return to make sun cc front end happy
src/arch/sparc/tlb.cc:
src/base/compression/lzss_compression.cc:
use std namespace for string ops
src/arch/sparc/utility.hh:
no reason to say something is unsigned unsigned int
src/base/compression/null_compression.hh:
dummy returns to for suncc front end
src/base/cprintf.hh:
use standard variadic argument syntax instead of gnuc specefic renaming
src/base/hashmap.hh:
don't need to define hash for suncc
src/base/hostinfo.cc:
need stdio.h for sprintf
src/base/loader/object_file.cc:
munmap is in std namespace not null
src/base/misc.hh:
use M5 generic noreturn macros
use standard variadic macro __VA_ARGS__
src/base/pollevent.cc:
we need file.h for file flags
src/base/random.cc:
mess with include files to make suncc happy
src/base/remote_gdb.cc:
malloc memory for function instead of having a non-constant in an array size
src/base/statistics.hh:
use std namespace for floor
src/base/stats/text.cc:
include math.h for rint (cmath won't work)
src/base/time.cc:
use suncc version of ctime_r
src/base/time.hh:
change macro to work with both gcc and suncc
src/base/timebuf.hh:
include cstring from memset and use std::
src/base/trace.hh:
change variadic macros to be normal format
src/cpu/SConscript:
add dummy returns where appropriate
src/cpu/activity.cc:
include cstring for memset
src/cpu/exetrace.hh:
include cstring fro memcpy
src/cpu/simple/base.hh:
add dummy return for panic
src/dev/baddev.cc:
src/dev/pciconfigall.cc:
src/dev/platform.cc:
src/dev/sparc/t1000.cc:
add dummy return where appropriate
src/dev/ide_atareg.h:
make define work for both gnuc and suncc
src/dev/io_device.hh:
add dummy returns where approirate
src/dev/pcidev.hh:
src/mem/cache/cache_impl.hh:
src/mem/cache/miss/blocking_buffer.cc:
src/mem/cache/tags/lru.hh:
src/mem/cache/tags/split.hh:
src/mem/cache/tags/split_lifo.hh:
src/mem/cache/tags/split_lru.hh:
src/mem/dram.cc:
src/mem/packet.cc:
src/mem/port.cc:
include cstring for string ops
src/dev/sparc/mm_disk.cc:
add dummy return where appropriate
include cstring for string ops
src/mem/cache/miss/blocking_buffer.hh:
src/mem/port.hh:
Add dummy return where appropriate
src/mem/cache/tags/iic.cc:
cast hastSets to double for log() call
src/mem/physical.cc:
cast pmemAddr to char* for munmap
src/sim/byteswap.hh:
make define work for suncc and gnuc

Add in constants which let you explicitly check if endian conversion would do anything. This was needed for a case where a piece of data was within a larger data type. When the larger data type was swapped, the location of the smaller data type would move.

fixes so that M5 will compile under solaris

SConstruct:
Add check to see if we need to include libsocket
src/arch/sparc/floatregfile.cc:
src/arch/sparc/intregfile.cc:
use memset rather than bzero and include the appropriate headerfile
src/base/pollevent.cc:
If we're compling under solaris we need sys/file.h
src/base/random.cc:
src/base/random.hh:
solaris doesn't have random(), so use rint with the correct rounding mode
if we're compiling on solaris
src/base/stats/flags.hh:
u_int32_t??
src/base/time.hh:
grab the timersub() define from freebsd since it doesn't exist in solaris
src/cpu/inst_seq.hh:
we don't need to include stdint here
src/sim/byteswap.hh:
the method to detect endianness on Solaris is a little more complex...

Added myself to the authors list.

include misc.hh for panic

add mac os x fast byte swap code

Merge zizzer:/bk/newmem
into zeep.eecs.umich.edu:/z/saidi/work/m5.newmem

minor header cleanups

src/dev/alpha_console.cc:
Remove my name twice from header
src/dev/ide_disk.cc:
Spell my full name correctly
src/mem/bus.hh:
I think I edited much of this
src/sim/byteswap.hh:
I believe most of this code is mine or nate's

Fixes to compile under Cygwin.

src/kern/linux/linux.hh:
src/kern/solaris/solaris.hh:
Rename BSD_HOST to the more specific NO_STAT64.
src/sim/byteswap.hh:
Replace set of swap_byte functions with a single
templated version. Hope this fixes compiler issues
with e.g. int32_t vs int disambiguation.
src/sim/syscall_emul.hh:
Rename BSD_HOST to the more specific NO_STAT64.
Set this for __CYGWIN__.

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.