necessary. #define TLB_FLUSH_LOWVA to turn it back on.
- remove the #if 0'd code in sparc64_ipi_flush_pte_usiii(), i have
verified that it is not required.
- add a missing membar #Sync to sp_tlb_flush_pte_usiii().
use it to patch up TLB flush instructions that don't match for USI/II
and later. we can also hopefully use this to make GENERIC.MP minimally
expensive on single CPU machines as well.
this is the last piece needed to get GENERIC/GENERIC.MP to boot on the
USIII* machines.
idea and some initial code from openbsd.
per PR port-i386/42787 (the panic happens due to a GPF when a
privileged descriptor is tried to be loaded with the UPL bit set)
The original bug is very old (pre-2.0, i386/svr4_machdep.c rev. 1.69),
but it was relatively harmless until the order of GDT entries was
shuffled (pre-5.0, i386/segments.h rev. 1.42). Before, it caused
a userlevel data selector to be used for CS which broke the emulation
(likely the reason of PR port-i386/32424). The shuffle made that
a privileged selector was used, causing the GPF.
(recent -current doesn't panic on that GPF which seems to be a
side effect of another change)
1) Add support for multiple filesystems including ffsv1, ffsv2, lfsv1 and lfsv2.
(ffsv1 and lfsv2 are known to work. ffv2 support needs more work. lfsv1 is
probably untested.)
2) Only 32-bit Fcodes are used. All 64-bit math uses two cells. This means it
should work on 32-bit machines.
Additional work to consider:
1) Rename genfth.cf to genffs.cf, or keep it and move the ffs symbols to genffs.cf
2) Move the ffs code and the lfs code to different source files so you can
selectively fload the just the filesystems you want.
3) Add code to load ELF files directly instead of relying on the host firmware
ELF support. But, since the binary is now 7250 bytes there may not be room.
the standard atomic compare-and-swap operations. Tell some caveats.
Manual page links, *_ni.3 -> atomic_cas.3 are coming up after a
successful 'build.sh distribution'.
