BIOS calls can be used for device probing etc.
And now it's getting nasty:
The kvm86 code needs a TSS, and it is most convenient to use proc0's
instead of doing some static allocation. (We might reconsider this if
we want to use vm86 for console initialization, ie much earlier.)
For the TSS slot to be allocated, we have to move the call to
i386_proc0_tss_ldt_init() up.
Since the npx code twiddles CR0 the corresponding pcb field must
be synchronized later. It would probably be cleaner to do this in
the npx driver.
8086 machine. Ifff it works, it is much easier and more elegant than
going to real real mode:
-simpler code
-no need for "identity" memory mappings
-easy passing of buffers for bulk data to functions
-some more control
There is no interrupt support ATM, and it lacks a function to access
random virtual memory of the VM. MP issues to consider.
IEEE 1003.1-2001 (where applicable) and other systems, by follwoing symlinks
on the command line and changing their targets' modes/ownership/flags, rather
than ignoring them.
This fixes PR standards/563 (at last).
- accumulating all emulation code (including floating-point) in one place
- steal MachFPInterrupt() back from SOFTFLOAT for use only with interrupts
and traps from *real* FPUs
- introducing MachEmulateInst() as a common dispatch point for all
emulated instructions
- cleaning up emulation dispatch in trap()
Also, while we're here, implement MIPS2 LL/SC/SYNC emulation for MIPS1.
Tested on r3k with and without SOFTFLOAT enabled.
exist on an on-disk inode, we keep a record of its size in struct inode,
which is updated when we write the block to disk. The cleaner routines
thus have ready access to what size is the correct size for this block,
on disk.
Fixed a related bug: if a file with fragments is being cleaned
(fragments being cleaned) at the same time it is being extended beyond
NDADDR blocks, we could write a bogus FINFO record that has a frag in the
middle; when it was cleaned this would give back bogus file data. Don't
write the indirect blocks in this case, since there is no need.
lfs_fragextend and lfs_truncate no longer require the seglock, but instead
take a shared lock, which the seglock locks exclusively.
bjh21