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the holes a MMU may have from a given vm_map. This will be automagically
invoked for newly created vmspaces.
On platforms with MMU holes (e.g. sun4, sun4c and vax), this prevents
mmap(2) hints which would end up being in the hole to be accepted as valid,
causing unexpected signals when the process tries to access the hole
(since pmap can not fill the hole anyway).
Unfortunately, the logic mmap() uses to pick a valid address for anonymous
mappings needs work, as it will only try to find an address higher than the
hint, which causes all mmap() with a hint in the hole to fail on vax. This
will be improved later.
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correctly in child_return()'s userret(); makes the sys/kern/signal/earlysig
regression test pass. From a 2.5 years old diff I should have commited much
earlier.
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space, either cache coherent for regular mappings and uncached for
BUS_DMA_COHERENT mappings, as done on all other platforms with direct mappings.
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nops unless we compile for early RM7000 flavours, which we usually don't do.
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jump into the scheduler loop.
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happen; from NetBSD
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shifted, instead of the other way around; this shaves a few instructions.
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jal instructions.
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the high order bits are not undefined when invoking hw_setintrmask() on
return.
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for the cpu, contiguous from different bases for devices. This allows
memory above 256MB to be used with bus_dma (and we had really been lucky
with the first few large-memory builds).
Information about memory accesses taken from Linux.
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Even if the latter would end up removing the mappings by itself, it would
do so using pmap_remove() because phys_map is not intrsafe; but some
platforms use pmap_kenter_pa() in vmapbuf(). By removing the mappings
ourselves, we can ensure the remove function used matches the enter function
which has been used.
Discussed and theoretical ok art@
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use it" balony
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bytes, no functional change.
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cpu_disklabel's. 'labelsector' is not used anywhere according to grep.
'go for it' deraadt@
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to support hotplug media on most architectures. disklabel setup and
verification done using new helper functions. Disklabels must *always*
have a correct checksum now. Same code paths are used to learn on-disk
location disklabels, to avoid new errors sneaking in. Tested on almost all
cases, testing help from todd, kettenis, krw, otto, dlg, robert, gwk, drahn
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correct and unify; ok thib miod
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routines (alpha, vax) prove to be not worth keeping. Move
bounds_check_with_label() into the MI world. Eliminate unreliable and
almost certainly useless checks for overwriting a disklabel.
After discussion with deraadt@
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implimentations were simply either missing code, or spacing and such.
setdisklabel() can become MI now.
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kernel compiles again.
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*_LABELOFFSET. Don't use osdep->labelsector since it will always be
LABELSECTOR, since we don't support extended DOS partitions holding
the OpenBSD disk label.
No functional change. Now only Alpha and Vax bounds_check_with_label
differ by more than comments.
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there.
'so go to it!' deraadt@
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type of all variables to daddr64_t. this includes the APIs for XXsize()
and XXdump(), all range checks inside bio drivers, internal variables
for disklabel handling, and even uvm's swap offsets. re-read numerous
times by otto, miod, krw, thib to look for errors
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accuracy so that the variious disksubr.c's can be compared easier.
setdisklabel() starts taking an int for openmask.
ok krw, and read by quite a few other people
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to size. tested on almost all machines, double checked by miod and krw
next comes the type handling surrounding these values
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convert version 0 to version 1 disklabels.
Suggested by deraadt@.
ok deraadt@ otto@
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bounds_check_with_label() routines as identical as possible without
changing any code. Code nits and adjustments to come.
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bounds_check_with_label. All callers check for <= 0, so no functional
change.
Feedback from miod@.
ok weingart@
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A: It didn't.
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This changes nothing on legacy architectures, but is a bit faster (and simpler)
on the interesting ones.
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free room in struct partition by packing fragment size and
fragments/block more tighlty and use the resulting space to make
offset and size 48 bits. For the disk part we use spare fields in
struct disklabel. Kernel converts in-mem copy of the on-disk
label if needed, disklabel(8) writes new version.
We are careful to only change fields not used by bootloaders.
Conception of basic scheme by deraadt.
ok deraadt@ krw@
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preparation for translating all disk labels visible to the kernel to
the soon to arrive V1 format.
ok otto@ deraadt@
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mbuf constants from MD param.h to MI param.h.
Besides being the same on every arch, things will
most probly break if any arch has different values
then the others.
The NMBCLUSTERS constants needs to be MD though;
ok miod@,krw@,claudio@
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