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This "power saving" disables the apic when both cpu cores hit the hlt
instruction which kills our timer.
From FreeBSD.
(poked by kettenis)
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- math.h shouldn't define FLT_EVAL_METHOD, but float.h should (per
C99). remove from math.h, and add proper definitions in float.h
ok millert@
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Right now when mi_switch picks up the same proc, we didn't clear the
flag which would mean that every time we service an AST we would attempt
a context switch. For some architectures, amd64 being probably the
most extreme, that meant attempting to context switch for every
trap and interrupt.
Now we clear_resched explicitly after every context switch, even if it
didn't do anything. Which also allows us to remove some more code
in cpu_switchto (not done yet).
miod@ ok
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parameter and returns an aligned random load address for position
independent executables to use. This also adds three new vmparam.h
defines to specify the maximum address, minimum address and minimum
allowed alignment for uvm_map_pie() to use. The PIE address range
for i386 was carefully selected to work well within the i386 W^X
framework.
With much help and feedback from weingart@.
okay weingart@, miod@, kettenis@, drahn@
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* For amd64, remove pcibios traces.
* make RBUS_IO_START, RBUS_IO_SIZE, RBUS_MIN_START and RBUS_MEM_SIZE
(on i386) configurable via kernel options.
* Remove unneeded headers.
* Some cleanups.
originally reported in pr/5829 and tested by viq <viq at viq dot ath dot cx>.
fixes ian@ laptop too.
kettenis@ and miod@ agrees that although not perfect, this is the right
direction.
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Not sure what's more surprising: how long it took for NetBSD to
catch up to the rest of the BSDs (including UCB), or the amount of
code that NetBSD has claimed for itself without attributing to the
actual authors.
OK deraadt@
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own page 0, as discussed with miod (and many others previously, including
art and toby). On sparc, make this __LDPGSZ because PAGE_SIZE is non-constant
ok miod tedu
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config file, only configure the driver when we have an AMD Geode LX
CPU and the graphics processor is available.
mainbus part by miod, ok miod, matthieu
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See http://download.intel.com/technology/security/downloads/31516804.pdf
for more information.
ok deraadt@ 'looks ok to me' djm@
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ok dlg@, tested by dlg@, oga@, jsg@, deraadt@
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ok krw@
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ok weingart@
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and do an ipi_nop cross-call from signotify() instead.
ok miod@
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pointed out by and ok drahn@, toby@;
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ok marco@
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before pcibios(4), and then.... if acpi(4) attaches, skip pcibios(4) since
it messes the machines up. Fixes claudio's HP dl320 G5, and almost assuredly
others.
ok kettenis
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also assume that 386 cpus are really unknown, and promote them to 486
instead of panic.
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code. At this moment all architectures get the copy of the old code
except i386 which gets a new shiny implementation that doesn't spin
at splhigh (doh!) and doesn't try to grab the biglock when releasing
the biglock (double doh!).
Shaves 10% of system time during kernel compile and might solve a few
bugs as a bonus.
Other architectures coming shortly.
miod@ deraadt@ ok
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a single device node will talk to the right kernel code automatically.
ok deraadt
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uniform. as a result shared code like acpi needs less #ifdef's
ok marco kettenis
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ok deraadt
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designations.
ok deraadt
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prompted by deraadt
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ok deraadt
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significantly clean up the APM idle loop things. I actually can make
sense of what the APM idle loop is supposed to do.
Ok gwk@, beck@, and theo says ramdisks compile.
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ok art deraadt
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noone else uses this acpi except the command); from Mike Belopuhov
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well (in fact, all 4 combinations of codebase and processor) written by
Mike Belopuhov and Aleksey Lomovtsev
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- Move the functionality of choosing a process from cpu_switch into
a much simpler function: cpu_switchto. Instead of having the locore
code walk the run queues, let the MI code choose the process we
want to run and only implement the context switching itself in MD
code.
- Let MD context switching run without worrying about spls or locks.
- Instead of having the idle loop implemented with special contexts
in MD code, implement one idle proc for each cpu. make the idle
loop MI with MD hooks.
- Change the proc lists from the old style vax queues to TAILQs.
- Change the sleep queue from vax queues to TAILQs. This makes
wakeup() go from O(n^2) to O(n)
there will be some MD fallout, but it will be fixed shortly.
There's also a few cleanups to be done after this.
deraadt@, kettenis@ ok
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by savectx().
ok art@, miod@
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Paraphrasing, "make it clear this should be fixed in pcc asap".
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__builtin_next_arg for !GCC until pcc supports it. ok kjell@ miod@
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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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to synchronize the tsc between CPUs anymore. While here, also remove
the slow TLB IPI since it's been dead for a while.
noticed by mickey
toby@ ok
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version for i386
more architectures and ctob() replacement is being worked on
prodded by and ok miod
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Comments and ok kettenis, art & miod
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cpu_disklabel can go away, since nothing anymore needs to use it; ok miod
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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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ok jsg
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the commit which enabled DEADBEEF* overrides, then values have been
discussed a bit more and improved; reminded by and ok art@
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pieces. Since this is where the "boot both ELF32 and ELF64" behaviour
is turned on for i386, it is quite important.
Bump version numbers too.
Found by ckuethe@; thanks.
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