counterparts to bus_dmamem_alloc() and bus_dmamem_free(). This allows
the caller to specify the size of the allocation instead of it defaulting
to the max_size field of the busdma tag.
This is intended to aid in converting drivers to busdma. Lots of
hardware cannot understand scatter/gather lists, which forces the
driver to copy the i/o buffers to a single contiguous region
before sending it to the hardware. Without these new methods, this
would require a new busdma tag for each operation, or a complex
internal allocator/cache for each driver.
Allocations greater than PAGE_SIZE are rounded up to the next
PAGE_SIZE by contigmalloc(), so this is not suitable for multiple
static allocations that would be better served by a single
fixed-length subdivided allocation.
Reviewed by: jake (sparc64)
data structure called kse_upcall to manage UPCALL. All KSE binding
and loaning code are gone.
A thread owns an upcall can collect all completed syscall contexts in
its ksegrp, turn itself into UPCALL mode, and takes those contexts back
to userland. Any thread without upcall structure has to export their
contexts and exit at user boundary.
Any thread running in user mode owns an upcall structure, when it enters
kernel, if the kse mailbox's current thread pointer is not NULL, then
when the thread is blocked in kernel, a new UPCALL thread is created and
the upcall structure is transfered to the new UPCALL thread. if the kse
mailbox's current thread pointer is NULL, then when a thread is blocked
in kernel, no UPCALL thread will be created.
Each upcall always has an owner thread. Userland can remove an upcall by
calling kse_exit, when all upcalls in ksegrp are removed, the group is
atomatically shutdown. An upcall owner thread also exits when process is
in exiting state. when an owner thread exits, the upcall it owns is also
removed.
KSE is a pure scheduler entity. it represents a virtual cpu. when a thread
is running, it always has a KSE associated with it. scheduler is free to
assign a KSE to thread according thread priority, if thread priority is changed,
KSE can be moved from one thread to another.
When a ksegrp is created, there is always N KSEs created in the group. the
N is the number of physical cpu in the current system. This makes it is
possible that even an userland UTS is single CPU safe, threads in kernel still
can execute on different cpu in parallel. Userland calls kse_create to add more
upcall structures into ksegrp to increase concurrent in userland itself, kernel
is not restricted by number of upcalls userland provides.
The code hasn't been tested under SMP by author due to lack of hardware.
Reviewed by: julian
- Sort definition of cpu_* variables appropriately.
- Move cpu_fxsr out of the magic non-BSS set of variables and stick it in
the BSS along with hw_instruction_sse (make the latter static as well).
Submitted by: bde (partially)
variable to something in the cpu_* namespace since that's what all the
other cpuid variables were named and cpu_procinfo is what I came up with.
Requested by: bde
metadata. This fixes module dependency resolution by the kernel linker on
sparc64, where the relocations for the metadata are different than on other
architectures; the relative offset is in the addend of an Elf_Rela record
instead of the original value of the location being patched.
Also fix printf formats in debug code.
Submitted by: Hartmut Brandt <brandt@fokus.gmd.de>
PR: 46732
Tested on: alpha (obrien), i386, sparc64
<machine/ieeefp.h> where it belongs.
o Remove the i386 specific inclusion of <machine/floatingpoint.h>
from <ieeefp.h>, now that including <machine/ieeefp.h> is enough
for all architectures.
o Allow <machine/ieeefp.h> to inline the functions exposed by the
headers by checking for _IEEEFP_INLINED_ in the MI header. When
defined, prototypes are not given and it is assumed that the MD
headers, when inlining only a subset of the functions provide
prototypes for the functions not being inlined.
Based on patch from: Terry Lambert <tlambert2@mindspring.com>
Tested with: make release.
Interface (SMAPI) BIOS, which is present on some IBM
Thinkpad models (560, 600, 770 to name a few.)
The SMAPI BIOS provides access to System Information,
System Configuration, and Power Management.
portable copy. Note that pmap_extract() must be used instead of
pmap_kextract().
This is precursor work to a reorganization of vmapbuf() to close remaining
user/kernel races (which can lead to a panic).
frequency in Hz. The default is still 33.333 MHz. Please notice
that the number is round to a multiple of four internally so it may
not read back exactly the same as written.
Add compile time ELAN_XTAL option to override the 33.333 MHz default.
Add compile time ELAN_PPS option to enable code for high precision
(250 nanoseconds) timestamping of external signals.
pointer types, and remove a huge number of casts from code using it.
Change struct xfile xf_data to xun_data (ABI is still compatible).
If we need to add a #define for f_data and xf_data we can, but I don't
think it will be necessary. There are no operational changes in this
commit.
cpu_exthigh and cpu_brand in printcpuinfo() instead of in identify_cpu().
We also only do it for known-good values of cpu_vendor which is a bit more
conservative.
Reviewed by: bde (mostly)
print_AMD_foo() functions.
- Add a brand name table for the brand index provided on Intel CPU's in
%ebx after cpuid 1.
- For Intel CPUs, if we don't get a processor name from the extended cpuid
then use the brand index in cpuid_cpuinfo to pick a name from the brand
table and copy that name into cpu_brand.
- Replace the duplicated code to use the extended cpuid to replace
cpu_model with the processor name in the AMD and Transmeta sections of
printcpuinfo() with generic code that replaces cpu_model with
cpu_brand if cpu_brand is not an empty string. We also trim leading
spaces from cpu_brand prior to doing this since at least some processor
names (notably those of Intel CPUs) have leading spaces in the name.
- Give print_AMD_features() its own private regs[] array since
printcpuinfo() doesn't use the one it has anymore.
returned from cpuid 0x80000000.
- Add a cpu_brand char array to hold the processor name returned by
cpuid 0x80000002-0x80000004 on AMD, Intel, Transmeta, and possibly
other CPUs.
- Use cpuid to set cpu_exthigh and read the processor name if it is present
in identify_cpu().
in the mptable. The way this works is that we determine if the system
has hyperthreading and how many logical CPU's should be in each physical
CPU by using the information returned by cpuid. During the first pass of
the mptable, we build a bitmask of the APIC IDs of the CPUs listed in the
mptable. We then scan that bitmask to see if the CPUs are already listed
by the mptable, or if there are any APIC IDs already in use that would
conflict with the APIC IDs of the logical CPUs. If that test succeeds,
then we fixup the count of application processors. Later on during the
second pass of the mptable we create fake processor entries for logical
CPUs and add them to the system.
We only need this type of fixup hack when using the mptable to enumerate
CPUs. The ACPI MADT table properly enumerates all logical CPUs.
(show thread {address})
Remove the IDLE kse state and replace it with a change in
the way threads sahre KSEs. Every KSE now has a thread, which is
considered its "owner" however a KSE may also be lent to other
threads in the same group to allow completion of in-kernel work.
n this case the owner remains the same and the KSE will revert to the
owner when the other work has been completed.
All creations of upcalls etc. is now done from
kse_reassign() which in turn is called from mi_switch or
thread_exit(). This means that special code can be removed from
msleep() and cv_wait().
kse_release() does not leave a KSE with no thread any more but
converts the existing thread into teh KSE's owner, and sets it up
for doing an upcall. It is just inhibitted from being scheduled until
there is some reason to do an upcall.
Remove all trace of the kse_idle queue since it is no-longer needed.
"Idle" KSEs are now on the loanable queue.
of the `machdep.acpi_root' sysctl. This is required on ia64
because the root pointer hardly ever, if at all, lives in the
first MB of memory and also because scanning the first MB of
memory can cause machine checks.
This provides a save and reliable way for ACPI tools to work
with the tables if ACPI support is present in the kernel. On
ia64 ACPI is non-optional.
GENERIC. Each device can be re-enabled at startup time by unsetting the
disabled hint in the loader.
Requested by: mdodd
Approved by: re
Prodded by: rwatson
The correct range is [1...7] with Sunday=1, but we have been writing
[0...6] with Sunday=0.
The Soekris computers flagged the zero, zapped the date, so if you
rebooted your soekris on a sunday, it would come up with a wrong
date.
Bruce has a more extensive rework of this code, but we will stick with
the minimalist fix for now.
Spotted by: Soren Kristensen <soren@soekris.com>
Thanks to: Michael Sierchio <kudzu@tenebras.com>.
Confirmed by: bde
Approved by: re
to accomodate the new SSE/XMM floating point save/restore
instructions.
This commit is mostly from bde and includes some style nits.
Approved by: re (jhb)
pmap_remove_pte(). Use vm_page_sleep_if_busy() in
_pmap_unwire_pte_hold() so that the page queues lock is released
when sleeping.
Approved by: re (blanket)
to the sparc64 implementation. (Note: With modest effort on the alpha and
ia64 this function could migrate to the MI part of the kernel.)
Approved by: re (blanket)
i386 cpu_thread_exit(). This resulted in a panic with WITNESS
since we need to hold Giant to call kmem_free(), and we weren't
helding it anymore in cpu_thread_exit(). We now do this from a
new MD function, cpu_thread_dtor(), called by thread_dtor().
Approved by: re@
Suggested by: jhb
macro for use when parsing MADT tables, thus we always tried to set the
interrupt model to APIC. This proved to be harmful on UP machines with
IO APIC's (or for UP kernels on SMP machines) since the wrong interrupt
routing information would be returned.
Pointy hat to: jhb
Approved by: re (rwatson)
Previously these were libc functions but were requested to
be made into system calls for atomicity and to coalesce what
might be two entrances into the kernel (signal mask setting
and floating point trap) into one.
A few style nits and comments from bde are also included.
Tested on alpha by: gallatin
o on input don't strip the Ethernet header from packets
o input packet handling is now done with if_input
o track changes to ether_ifattach/ether_ifdetach API
o track changes to bpf tapping
o call ether_ioctl for default handling of ioctl's
o use constants from net/ethernet.h where possible
Reviewed by: many
Approved by: re
to reflect its new location, and add page queue and flag locking.
Notes: (1) alpha, i386, and ia64 had identical implementations
of pmap_collect() in terms of machine-independent interfaces;
(2) sparc64 doesn't require it; (3) powerpc had it as a TODO.
has broken int 12H.
If hw.hasbrokenint12="1" in loader environment, kernel never use BIOS
INT 12 call to determine base memory size.
Otherwise, kernel use INT 12 in old behaviour.
This should fix kernel panic problem caused by 1.544 changes.
MFC after: 1 day
sysctls to MI code; this reduces code duplication and makes all of them
available on sparc64, and the latter two on powerpc.
The semantics by the i386 and pc98 hw.availpages is slightly changed:
previously, holes between ranges of available pages would be included,
while they are excluded now. The new behaviour should be more correct
and brings i386 in line with the other architectures.
Move physmem to vm/vm_init.c, where this variable is used in MI code.
take advantage of the fact that the vm object's list of pages is
now ordered to reduce the overhead of finding the desired set of
pages to be mapped. (See revision 1.215 of vm/vm_page.c.)
