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* Compromise for critical*()/cpu_critical*() recommit. Cleanup the interruptdillon2002-03-271-0/+1
| | | | | | | | | | | | | | | | | | | disablement assumptions in kern_fork.c by adding another API call, cpu_critical_fork_exit(). Cleanup the td_savecrit field by moving it from MI to MD. Temporarily move cpu_critical*() from <arch>/include/cpufunc.h to <arch>/<arch>/critical.c (stage-2 will clean this up). Implement interrupt deferral for i386 that allows interrupts to remain enabled inside critical sections. This also fixes an IPI interlock bug, and requires uses of icu_lock to be enclosed in a true interrupt disablement. This is the stage-1 commit. Stage-2 will occur after stage-1 has stabilized, and will move cpu_critical*() into its own header file(s) + other things. This commit may break non-i386 architectures in trivial ways. This should be temporary. Reviewed by: core Approved by: core
* Remove __P.alfred2002-03-201-3/+3
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* Overhaul the per-CPU support a bit:jhb2001-12-111-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | - The MI portions of struct globaldata have been consolidated into a MI struct pcpu. The MD per-CPU data are specified via a macro defined in machine/pcpu.h. A macro was chosen over a struct mdpcpu so that the interface would be cleaner (PCPU_GET(my_md_field) vs. PCPU_GET(md.md_my_md_field)). - All references to globaldata are changed to pcpu instead. In a UP kernel, this data was stored as global variables which is where the original name came from. In an SMP world this data is per-CPU and ideally private to each CPU outside of the context of debuggers. This also included combining machine/globaldata.h and machine/globals.h into machine/pcpu.h. - The pointer to the thread using the FPU on i386 was renamed from npxthread to fpcurthread to be identical with other architectures. - Make the show pcpu ddb command MI with a MD callout to display MD fields. - The globaldata_register() function was renamed to pcpu_init() and now init's MI fields of a struct pcpu in addition to registering it with the internal array and list. - A pcpu_destroy() function was added to remove a struct pcpu from the internal array and list. Tested on: alpha, i386 Reviewed by: peter, jake
* Split the per-process Local Descriptor Table out of the PCB and intojhb2001-10-251-0/+18
| | | | | | | struct mdproc. Submitted by: Andrew R. Reiter <arr@watson.org> Silence on: -current
* KSE Milestone 2julian2001-09-121-0/+3
| | | | | | | | | | | | | | Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
* Add a new MI pointer to the process' trapframe p_frame instead of usingjhb2001-06-291-1/+0
| | | | | | various differently named pointers buried under p_md. Reviewed by: jake (in principle)
* $Id$ -> $FreeBSD$peter1999-08-281-1/+1
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* Enable vmspace sharing on SMP. Major changes are,luoqi1999-04-281-1/+3
| | | | | | | | | | | | | | | | | - %fs register is added to trapframe and saved/restored upon kernel entry/exit. - Per-cpu pages are no longer mapped at the same virtual address. - Each cpu now has a separate gdt selector table. A new segment selector is added to point to per-cpu pages, per-cpu global variables are now accessed through this new selector (%fs). The selectors in gdt table are rearranged for cache line optimization. - fask_vfork is now on as default for both UP and SMP. - Some aio code cleanup. Reviewed by: Alan Cox <alc@cs.rice.edu> John Dyson <dyson@iquest.net> Julian Elischer <julian@whistel.com> Bruce Evans <bde@zeta.org.au> David Greenman <dg@root.com>
* Convert md_regs from an int[] to a struct trapframe *. It simplifiespeter1997-05-071-7/+4
| | | | some code.
* Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are notpeter1997-02-221-1/+1
| | | | ready for it yet.
* Make the long-awaited change from $Id$ to $FreeBSD$jkh1997-01-141-1/+1
| | | | | | | | This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
* hp300 -> i386nate1996-04-101-2/+2
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* The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch.rgrimes1994-05-251-3/+1
| | | | | Reviewed by: Rodney W. Grimes Submitted by: John Dyson and David Greenman
* Made all header files idempotent and moved incorrect common data fromwollman1993-11-071-1/+5
| | | | | headers into a related source file. Added cons.h as first step towards moving i386/i386/cons.h to machine/cons.h where it belongs.
* Removed all patch kit headers, sccsid and rcsid strings, put $Id$ in, somergrimes1993-10-161-1/+2
| | | | minor cleanup. Added $Id$ to files that did not have any version info, etc
* Initial import, 0.1 + pk 0.2.4-B1rgrimes1993-06-121-0/+47
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