directly, call the function pointer (*if_input)(ifp, m). The input routine
expects the packet header to be at the head of the packet, and will adjust
as necessary. Privatize the layer 2 input and output routines, allowing
*_ifattach() to set them up as appropriate.
the child inherits the stack pointer from the parent (traditional
behavior). Like the signal stack, the stack area is secified as
a low address and a size; machine-dependent code accounts for stack
direction.
This is required for clone(2).
unaligned access handler and clean it up some. Add support for emulating
the BWX instructions (ld{b,w}u, st{b,w}, sext{b,w}), which user software
can expect to be emulated. (Thanks, Alpha Architecture!)
register names was confusing, and could not _be_ correct in some cases.
Also, add a couple of 'generic' instruction formats which should be used
when decoding instructions before the specific format is known.
* Implement fpgetsticky() for alpha.
* Direct fpsetsticky() and fp{get,set}mask() into alpha kernel via sysarch(2).
* Define new sysarch(2) stub for above and install and distribute sysarch.h
for alpha. (The fpcr IS user mode r/w, but for reasons beyond the scope
of a commit message kernel calls are needed.) And much kernel Magick is
required before these do anything, but this way programs compiled under
1.4 will DTRT on future snapshots and releases.
in DDB (e.g. if a bad pointer was dereferenced; the debugger will recover).
- Change a comment to indicate that we are on the debugger stack when we get
to ddb_trap().
- Fix possible buglet in computation of the branch target in db_branch_taken().
happen. If the debugger doesn't handle the trap, arrange things so the
debugger won't be called again before we panic.
- Before panic'ing, give the debugger a chance to field the trap, and
if the debugger has handled things, allow the kernel to continue running,
like the i386 port does.
debugger differently.
- Pull in debugger glue if DDB is configured.
And one unrelated change, while I was here: Don't create a fake trapframe
for main(); it hasn't been used by main() for quite some time, and panic
if main() returns, because that's not supposed to happen now.
- Actually display the kn300 irq, not the MCPCIA irq, in the interrupt
string. Also, don't bother displaying device/pin on strays, since
it doesn't play will with shared interrupts that would happen due to
a PCI-PCI bridge.
- Shave a few more cycles out of the interrupt dispatch routine.
supposed to be Window 1, but a cut'n'paste error made it stomp over
Window 0, thus breaking ISA DMA. Fix this. (Confirmed to work with
floppy driver.)
While I'm here, do something I've been meaning to do for a while: change
Window 1 from a 1G at 2G to a 2G at 2G direct-mapped window, and add
a Window 2 of 1G at 1G SGMAP-mapped. Chain Window 2 to Window 1, and
use it as a fall-back for PCI DMA if the system has more than 2G of RAM.
The access is more efficient this way (and this was done in the interrupt
dispatch code, so some cycles are actually shaved), and gcc gets annoyed
when chars are used as array subscripts.
- Adjust for the fixed Rawhide console initialization.
- When mapping a PCI interrupt, don't always map device 1 to IRQ 16. Device
1 is only the internal 53c810 on MID 5, and is an invalid device number
on any other MID.
- Adjust for change mcpcia_config/mcpcia_softc structures.
- Nuke the kludgy linked list of mcpcia_softc structures. Instead, just
use savunit[v] to index into mcpcia_cd.cd_devs[] to find the MCPCIA
which has the stray interrupt.
- Some other minor cosmetic cleanup.
thorpej