version.
Add disk_blocksize(9) so that disk drivers can record the physical
block size of a disk if it is different to DEV_BSIZE. Right now this
simply initialises dk_blkshift and dk_byteshift according to the
supplied block size. This information is used in the MI version of
bounds_check_with_label().
which have virtual address indexed cache and whose pmaps don't always
allow normal shared mappings even for read only pages.
In future, these pmaps should be rewritten to handle such read only
shared mappings properly like ARM pmap, but currently we just disable
sosend_loan() to avoid unnecessary uncached mappings and cache flushes
on MIPS3 CPUs, or map/unmap thrashing on SH4.
Discussed with thorpej a while ago.
module (in the same file even), so we know the offset at link time and
don't need a reloc. This kills the last text relocation in the sh3
libc.so.
While here, tweak the code slightly to put delay slots into use.
better use it for something else later. I'm also thinking of g/c'ing
the temp buffer and emit disassembly with db_printf direcly, and
get_ascii gets in the way.
the multiplications first. Round to nearest, instead of down.
When estimating pclock don't compute sh_clock.cpucycle_1us * 1000000
sh_clock.cpuclock is exactly that (but without rounding errors).
This improves timekeeping on my Jornada.
(effectively we were running syscalls with interrupts disabled).
splx back to previous interrupt level from tf->tf_ssr.
XXX: tlb_exception() still has that problem.
have the same virtual cache indexes (i.e. they won't cause virtual cache
aliases). Also prepare PMAP_PREFER(9) for SH4 to avoid some possible virtual
cache aliases.
More stuff should be added in pmap_enter(9), but at least this changes
should fix some existing problems. See discussion on port-sh3 ML for details.
OK'ed by uwe and chs, and closes PR port-sh3/34243.
with several minor fixes by me.
Previously sh3 ports use two timers (TMU1 and TMU2) as oneshot timer
to cause real hardware interrupts by softintr(9), but now softintr(9)
uses only TMU1 and TMU2 is configured as freerunning counter for
timecounter(9).
Tested on my dreamcast.
We can have in a register an address that points to/into some variable
in the data segment, but db_print_loc_and_inst only looks for
functions, so it will misprint it as something unrelated from libkern
+ huge offset. E.g. instead of netbsd:cpu_info_store it would print
netbsd:prop_string_create_cstring+0xdeadbeef
Worse, if the address happens to be odd (char field in a struct, an
element of char array), attempt at printing the "instruction" at that
address will cause a fault and will abort "mach frame".
Disassemly is not really that useful in "mach frame" listing anyway
and more often just clutters things by overflowing 80 columns.
Dreamcast does not use SuperH on-chip RTC, so do it seprately from
other sh3 ports. Convert dreamcast rtc code into a real device
instead of searching/attaching it manually.
Tested by Nick Hudson.
scw