This will allow improvements to the pmaps so that they can more easily defer expensive operations, eg tlb/cache flush, til the last possible moment.
Currently this is a no-op on most platforms, so they should see no difference.
Reviewed by Jason.
be spread over several devices, and the phcb is usually the main one.
Add agp_machdep.c file which implements MD agp functions (currently
just agp_flush_cache).
APM_IOC_GETPOWER ioctl read/write. Setting the batteryid in the passed
structure returns the data for just that battery. The old ioctl
remains for binary compatibility but has been renamed.
Itojun already did the hard work -- I just added a couple of lines.
reviewed by: thorpej
This also involved updating the in-kernel DES functions to correspond
to the versions in our in-tree OpenSSL, because the des_SPtrans table
has changed; the asm code will not work with the old permutation table!
C and i386 asm code for the DES, 3DES, and Blowfish CBC modes is also
included; it is not currently built as the ESP processing in esp_core.c
splits the CBC operation and the cipher transform apart. Hopefully that
will be fixed as there is a substantial performance improvement to be had
from doing so. It will remain necessary to use the C version of the
Blowfish CBC function on some i386 machines, however, as the asm version
uses bswapl, which ony 486 and later processors have. The DES CBC code
doesn't have this problem.
Finally, change esp_core.c to use the ecb3_encrypt function instead of
calling ecb_encrypt three times; this improves performance a bit, in
particular in the asm case.
in the ARMADA config. On the M700 at least, the SMBus host controller lies
it 0x4000 (the beginning of the range allocated by default to rbus), and
stomping all over it causes bad things to happen.
- If we detect SSE/SSE2 support in the CPU, enable SSE exceptions
and set i386_has_{sse,sse2} as appropriate.
- Expose i386_use_fxsave and i386_has_{sse,sse2} through sysctl
as machdep.{osfsxr,sse,sse2}.
adding optimized versions for various CPU classes/models.
Split the 386 version of copyout into a separate routine, and
add a 486 version that doesn't have the class/page-writeability
check.
using level triggered interrupts, which livelocks calling intr routine
if the data register is not read in the interrupt routine, as it's case
when polling after interrupts are enabled during boot.
Block all interrupts when polling for keypress, and modify intr routine
to read and store value from data register. The latter one is to avoid
losing a keypress when one would manage to press a key when kernel is
not in spl-guarded code section.
Tested with classic pccons, 'pcconskbd at pckbc' and 'pckbd at pckbc'
configurations, on i386.
and with the comment '4.2BSD TCP/IP bug compat. Not recommended'
Add commented out 'TCP_DEBUG # Record last TCP_NDEBUG packets with SO_DEBUG'
(All hail amiga and atari which make some attempt to automate the
multiplicity of config files...)
on all platforms but the i386. On the i386 we look at T_PROTFLT and send
a SIGSEGV instead of SIGBUS. This makes allegro lisp 5.0 and pvs (a proof
verification system) to work.
XXX[1]: We need to go through each architecture and verify that we send
the correct signal on each trap type.
XXX[2]: trap.c on all other architectures but i386 needs to be modified
to s/trapsignal/(*p->p_emul->e_trapsignal)/g
trap/interrupt/syscall entry from userspace.
Remove special-case "by hand" validation of fs/gs register values as
well as special handling of them in various signal handling paths.
Now, like %ds and %es, they are validated by the hardware on return to
userland.
This paves the way for the use of %fs for per-cpu data on
multiprocessor systems, and fixes an otherwise difficult-to-fix
interaction between threads/clone(2) and USER_LDT.
Discussed in advance with Frank van der Linden.
them define __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH
in pci_machdep.h and pciide_map_compat_intr() only calls
pciide_machdep_compat_intr_establish() if that preprocessor
define exists.
Ports that don't need to do this no longer need to supply a
dummy function.
when the system is "warm", i.e. interrupts are not blocked anymore.
This seems to be necessary on my PS/2 Model 70 keyboard - without this,
system ends up in endless loop calling the keyboard intr routine if a key
is pressed when polling. This _may_ be just specific to level-triggered
interrupts PS/2 MCA uses, though it's more likely it's just the way the
particular keyboard controller works.
Discussed on tech-kern@.
enabling the INET6_MD_CKSUM option, which is defopted into opt_inet.h.
Supply an i386 assembly version of in6_cksum in in_cksum.s; on
P6-family cpu's, this is is roughly 20% faster than the C code in
sys/netinet6 for ethernet-mtu-sized mbufs in L1 cache. Turn on
INET6_MD_CKSUM in i386/conf/std.i386
While we're here, also nuke some now-obsolete XXX comments from
in_cksum.s.
(and unlock) the other pmap's pte's before continuing to the next
pmap. Avoids pmap lock leaks (generates LOCKDEBUG warning, deadlocks
MULTIPROCESSOR).
* recognize PS/2 L40 via biosmca() and biosmca_ps2model in gatea20.c, instead
of being a compile time option
* if the system is PS/2 with MCA bus, map DTYPE_ESDI disks to ed(4) for
COMPAT_OLDBOOT
The new code is conditional on SUPPORT_PS2 define, which is on by default
for biosboot-based bootblocks.
itself, and that got replaced with a call to memcpy. Ross deserves
most of the credit.
note that if you've seen bcopy elsewhere in the kernel, systm.h
defines it as a macro...
infrastructure) to indicate what C stubs should be generated for
various entry points.
2) Add comments noting various artifacts discovered while performing
task 1), including a bunch of stuff that may very well no longer be
used.
variable, if the machine has a MCA bus according to info returned
by BIOS (i.e. on machines without MCA bus, biosmca_ps2model would be zero).
biosmca() is expected to be called on beginning the initialization,
and biosmca_ps2model is then used for further checks.
using the APIC bit instead, according to the AMD Processor Recognition
App. Note. Add a fixup routine to patch up cpu_feature in this case.
XXX Need a way to kick the pmap to enable pmap_pg_g -- look at how the
MP branch deals with this.
- Start with 2 initial color bins, and recolor once we've determined
the number of color bins based on the formula:
(largest_cache_size / associativity) / PAGE_SIZE
- Add "associativity" to the cache_info structure.
- Add a (*cpu_cacheinfo)() function pointer, like we have a
(*cpu_setup)() function pointer. Cache info in the `cpuid'
is vendor-specific.
each vm_page structure. Add a VM_MDPAGE_INIT() macro to init this
data when pages are initialized by UVM. These macros are mandatory,
but ports may #define them to nothing if they are not needed/used.
This deprecates struct pmap_physseg. As a transitional measure,
allow a port to #define PMAP_PHYSSEG so that it can continue to
use it until its pmap is converted to use VM_MDPAGE_MEMBERS.
Use all this stuff to eliminate a lot of extra work in the Alpha
pmap module (it's smaller and faster now). Changes to other pmap
modules will follow.
to <sys/types.h> and <sys/stdint.h>.
* Add a new C99 <stdint.h> header, which provides integer types of
explicit width, related limits and integer constant macros.
* Extend <inttypes.h> to provide <stdint.h> definitions and format
macros for printf() and scanf().
* Add C99 strtoimax() and strtoumax() functions.
* Use the latter within scanf().
* Add C99 %j, %t and %z printf()/scanf() conversions for
intmax_t, pointer-type and size_t arguments.
Both models tested and seem to be quite stable and fast.
Thanks to:
- Hans Hubner <hans@Huebner.org> for giving me the cards for testing
- Georg Klug of Syskonnect, who provided me with hw docs for these cards,
very promptly and willingly - I wish all vendors would be like this
- Alfred Arnold, Linux SKNET driver author, for giving me valuable Syskonnect
contact :)
there are some pathological cases that cause pmap_page_protect()
to be called on a wired page to revoke all mappings. We
need to skip mappings that are actually wired to prevent Bad
things from happening later.
THIS IS JUST A WORK-AROUND. We need to prevent the pathological
behavior from happening in UVM to begin with. But it's unclear
what the right solution is there, right now.
- pmap_enter()
- pmap_remove()
- pmap_protect()
- pmap_kenter_pa()
- pmap_kremove()
as described in pmap(9).
These calls are relatively conservative. It may be possible to
optimize these a little more.
interrupts are properly reset on PS/2 now.
Handle the slighly different PS/2 CMOS layout and get/set century
byte as appropriate. The check for valid CMOS CRC checksum is not implemented
yet; I don't currently know algorithm they use.
The info about PS/2 CMOS was taken from the Padgett Peterson's
x86/MSDOS Interrupt List, release 60.
Tested with NE/2 card provided to me by Hans Hubner <hans@Huebner.ORG>.
The Compex and Arco cards were not tested. According to Linux ne2 driver,
they should work same way as NE/2.
and shares some bits with ISA AT1700 driver. Gee, this one was really
easy :)
This card turned out to be quite good performer - I get about 360KB/s
on 386DX PS/2 machine, which is best of all supported cards so far.
and use appropriately
- create more helper macros:
. cdev__xyz_init(c,n), such as cdev__ocri_init() for
/* open, close, read, ioctl */, etc.
. cdev__xRy_init(c,n), where nullop is used instead of enodev to dummy out
method `R' and the comments now read /* xxx (read) yyy */ instead
. cdev__xyz_t_init(c,n,t) - as per cdev__xyz_init, but sets d_type = t
as well
- use seltrue instead of dev_noimpl(poll,*), as (IIRC) cdevsw.d_poll should
always DTRT WRT returning a valid result. (a few devices previously
incorrectly returned ENODEV)
- use dev_noimpl(stop,enodev) instead of dev_noimpl(stop,nullop) if tty
== 0, because it doesn't matter if dev_type_stop isn't implemented in that
case, and it allows the use of the cdev__xyz_init macros. certain ports
(sparc,sparc64,x68k) used the nullop method for dev_type_stop in a few
drivers, whereas everything else uses enodev
- ensure that the comments are accurate WRT the behaviour of a given entry
they keep giving error 0x30b. Unfortunately this keeps happening every second
making the console unusable. Keep track of the last error that occurred and
if the last 10 times apm was called the same error was returned, give up and
exit the apm thread.
WD8003W/A, card provided by David Brownlee (thanks!). The SMC Elite stuff not
tested since I don't have any; hopefully it's correct, should match
information in ADF files.
The MCA-specific init quirk taken from Linux smc-mca.c driver.
I don't quite grok why it works, but it does *cross fingers*.
The WD8003W/A seems to be quite a good choice. I get like 340KB/s on my
machine, where 3c523 does only like 310KB/s. The numbers would be probably
even better with faster CPU than 386DX :)
provided to me by David Brownlee (thanks!).
Performance of this card is quite poor on my PS/2 with 386DX, like 100KB/s
at best, but as low as 5KB/s when transferring bigger files due to
packet overruns. It would be good to revisit this later, probably by
teaching the ic code to use RX Early.
jmc