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Justin Hibbits dc9b124d66 Create a new MACHINE_ARCH for Freescale PowerPC e500v2
Summary:
The Freescale e500v2 PowerPC core does not use a standard FPU.
Instead, it uses a Signal Processing Engine (SPE)--a DSP-style vector processor
unit, which doubles as a FPU.  The PowerPC SPE ABI is incompatible with the
stock powerpc ABI, so a new MACHINE_ARCH was created to deal with this.
Additionaly, the SPE opcodes overlap with Altivec, so these are mutually
exclusive.  Taking advantage of this fact, a new file, powerpc/booke/spe.c, was
created with the same function set as in powerpc/powerpc/altivec.c, so it
becomes effectively a drop-in replacement.  setjmp/longjmp were modified to save
the upper 32-bits of the now-64-bit GPRs (upper 32-bits are only accessible by
the SPE).

Note: This does _not_ support the SPE in the e500v1, as the e500v1 SPE does not
support double-precision floating point.

Also, without a new MACHINE_ARCH it would be impossible to provide binary
packages which utilize the SPE.

Additionally, no work has been done to support ports, work is needed for this.
This also means no newer gcc can yet be used.  However, gcc's powerpc support
has been refactored which would make adding a powerpcspe-freebsd target very
easy.

Test Plan:
This was lightly tested on a RouterBoard RB800 and an AmigaOne A1222
(P1022-based) board, compiled against the new ABI.  Base system utilities
(/bin/sh, /bin/ls, etc) still function appropriately, the system is able to boot
multiuser.

Reviewed By:	bdrewery, imp
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D5683
2016-10-22 01:57:15 +00:00
..
colldef Add the forgotten "svn mv" from r302329 2016-07-03 19:31:21 +00:00
ctypedef Posixify the locales name for variants 2016-07-03 18:21:11 +00:00
dict
doc rtwn(4), urtwn(4): merge common code, add support for 11ac devices. 2016-10-17 20:38:24 +00:00
dtrace Remove redefinitions of some kernel types from mbuf.d. 2016-09-03 20:43:59 +00:00
examples libifconfig: style(9) fixes 2016-09-04 20:55:27 +00:00
i18n Fix building on read-only source trees. 2016-08-22 22:50:58 +00:00
keys META MODE: Update dependencies with 'the-lot' and add missing directories. 2015-12-01 05:23:19 +00:00
man Fix a grammar error. 2016-10-21 18:45:09 +00:00
me
misc FreeBSD 11.0 release date added. 2016-10-10 18:36:26 +00:00
mk Create a new MACHINE_ARCH for Freescale PowerPC e500v2 2016-10-22 01:57:15 +00:00
monetdef Posixify the locales name for variants 2016-07-03 18:21:11 +00:00
msgdef Posixify the locales name for variants 2016-07-03 18:21:11 +00:00
numericdef Posixify the locales name for variants 2016-07-03 18:21:11 +00:00
security META MODE: These need object directories to handle staging. 2015-11-26 01:14:27 +00:00
sendmail Update share/examples/* to properly install /usr/share/examples. 2016-05-10 00:51:50 +00:00
skel Use more appropriate ${SHAREDIR} rather than /usr/share. 2015-10-27 23:35:02 +00:00
snmp
syscons DIRDEPS_BUILD: Run the staged bootstrap-tools version of build-tools. 2016-05-09 22:21:09 +00:00
tabset
termcap Replace ln -s calls with INSTALL_SYMLINK 2015-12-04 03:17:14 +00:00
tests Merge ^/user/ngie/release-pkg-fix-tests to unbreak how test files are installed 2016-05-04 23:20:53 +00:00
timedef Suffix short month names with "월" and replace %b with %_m for date formats. 2016-09-07 23:35:38 +00:00
vt Remove uudecode make rule for vt fonts 2016-02-29 18:35:16 +00:00
zoneinfo Reimplement r301944 using the correct install(1) invocation, which again 2016-06-16 13:34:20 +00:00
Makefile Posixify the locales name for variants 2016-07-03 18:21:11 +00:00
Makefile.inc