and POWER8. This instruction set unifies the 32 64-bit scalar floating
point registers with the 32 128-bit vector registers into a single bank
of 64 128-bit registers. Kernel support mostly amounts to saving and
restoring the wider version of the floating point registers and making
sure that both scalar FP and vector registers are enabled once a VSX
instruction is executed. get_mcontext() and friends currently cannot
see the high bits, which will require a little more work.
As the system compiler (GCC 4.2) does not support VSX, making use of this
from userland requires either newer GCC or clang.
Relnotes: yes
Sponsored by: FreeBSD Foundation
instructions to call through pointers instead. In general, these are set
implicitly through relocation processing. One has to be set explicitly in
machdep.c, however, to fit one handler in the tiny (8 instruction) space
available.
Reviewed by: andreast
Differential revision: D1554
Tested on: UP and SMP G5, Cell, POWER5+
Summary:
Revert the initial FBT-with-KDB changes for trap_subr*.S, and instead use the
db_trap filter function to handle dtrace trap filtering. With this, the MMU is
enabled by the support code, simplifying the codepath altogether.
Test Plan: Tested on my G4 PowerBook
Reviewers: #powerpc, nwhitehorn
Reviewed By: nwhitehorn
Differential Revision: https://reviews.freebsd.org/D1207
MFC after: 3 weeks
allows FPU emulation on AIM as well as providing support for the mfpvr
and lwsync instructions from userland on e500 cores. lwsync, in particular,
is required for many C++ programs to work correctly.
MFC after: 1 week
Use it universally. Book-E traps may also need revisiting due to the
introduction of fixed-offset traps and the deprecation of IVORs in POWER
ISA 2.06, but that's very much an issue for another day.
implementation specific vs. the common architecture definition.
Bring PPC4XX defines (PSL, SPR, TLB). Note the new definitions under
BOOKE_PPC4XX are not used in the code yet.
This change set is not supposed to affect existing E500 support, it's just
another reorg step before bringing support for E500mc, E5500 and PPC465.
Obtained from: AppliedMicro, Freescale, Semihalf
