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* Completed function declarations and/or added prototypes.Bruce Evans1995-11-211-2/+2
| | | | Notes: svn path=/head/; revision=12453
* Added `#include "ioconf.h"' to <machine/conf.h> and cleaned up theBruce Evans1995-11-042-4/+2
| | | | | | | | | | | | | misplaced extern declarations (mostly prototypes of interrupt handlers) that this exposed. The prototypes should be moved back to the driver sources when the functions are staticalized. Added idempotency guards to <machine/conf.h>. "ioconf.h" can't be included when building LKMs so define a wart in bsd.kmod.mk to help guard against including it. Notes: svn path=/head/; revision=12080
* Reduce jitter of Pentium microtime() implementation by letting the counterGarrett Wollman1995-10-121-23/+38
| | | | | | | | | | free-run and doing a subtract in microtime() rather than resetting the counter to zero at every clock tick. In combination with the changes to kern_clock.c, this should eliminate all the immediately obvious sources of systematic jitter in timekeeping on Pentium machines. Notes: svn path=/head/; revision=11452
* remove GCC divsi3 routines which are never used.Poul-Henning Kamp1995-10-051-4/+1
| | | | Notes: svn path=/head/; revision=11222
* Fix benign type mismatches in isa interrupt handlers. Many returned intBruce Evans1995-09-192-4/+4
| | | | | | | instead of void. Notes: svn path=/head/; revision=10910
* devfs changes..Julian Elischer1995-09-031-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | changes to allow devices that don't probe (e.g. /dev/mem) to create devfs entries this required giving 'configure' its own SYSINIT entry so we could duck in just before it with a DEVFS init and some device inits.. my devfs now looks like: ./misc ./misc/speaker ./misc/mem ./misc/kmem ./misc/null ./misc/zero ./misc/io ./misc/console ./misc/pcaudio ./misc/pcaudioctl ./disks ./disks/rfloppy ./disks/rfloppy/fd0.1440 ./disks/rfloppy/fd1.1200 ./disks/floppy ./disks/floppy/fd0.1440 ./disks/floppy/fd1.1200 also some sligt cleanups.. DEVFS needs a lot of work but I'm getting back to it.. Notes: svn path=/head/; revision=10537
* Remove "memory" clobber statement from enable_intr(). Enabling interruptsBruce Evans1995-08-261-4/+4
| | | | | | | | | doesn't invalidate loaded variables. Fix formatting of recent changes. Notes: svn path=/head/; revision=10342
* Killed some unused stuff inherited from Bill Jolitz. Note that sinceDavid Greenman1995-08-173-27/+5
| | | | | | | | | | this changes the size of the pcb struct, gdb will need to be rebuilt or debugging won't work correctly. Reviewed by: Bruce Evans Notes: svn path=/head/; revision=10092
* Make the spl oriented inline functions less likely to allowJohn Dyson1995-08-081-4/+5
| | | | | | | | potentially volatile memory to be kept in registers during the "call" (inline expansion.) Do the same for pmap_update. Notes: svn path=/head/; revision=10004
* Fix bogus constraint "i" that only worked with -O. The cases where itBruce Evans1995-07-251-3/+9
| | | | | | | | | | | didn't work are somewhat bogusly optimized away before the constraint is checked. We still expect constants passed to inline functions to remain constant, but if the compiler ever decides that they aren't constant then it will just generate slightly slower code instead of an error. Notes: svn path=/head/; revision=9714
* Rewrote memory sizing code to generally deal with holes in extended memory.David Greenman1995-07-191-2/+2
| | | | | | | | This code change should allow certain Compaq machines with a 128K hole at 16MB to work. Notes: svn path=/head/; revision=9578
* Make the bootinfo structure visible from sysctl.Poul-Henning Kamp1995-07-161-2/+4
| | | | | | | This can be used in libdisk to guess a better bios-geometry. Notes: svn path=/head/; revision=9546
* NOTE: libkvm, w, ps, 'top', and any other utility which depends on structDavid Greenman1995-07-131-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | proc or any VM system structure will have to be rebuilt!!! Much needed overhaul of the VM system. Included in this first round of changes: 1) Improved pager interfaces: init, alloc, dealloc, getpages, putpages, haspage, and sync operations are supported. The haspage interface now provides information about clusterability. All pager routines now take struct vm_object's instead of "pagers". 2) Improved data structures. In the previous paradigm, there is constant confusion caused by pagers being both a data structure ("allocate a pager") and a collection of routines. The idea of a pager structure has escentially been eliminated. Objects now have types, and this type is used to index the appropriate pager. In most cases, items in the pager structure were duplicated in the object data structure and thus were unnecessary. In the few cases that remained, a un_pager structure union was created in the object to contain these items. 3) Because of the cleanup of #1 & #2, a lot of unnecessary layering can now be removed. For instance, vm_object_enter(), vm_object_lookup(), vm_object_remove(), and the associated object hash list were some of the things that were removed. 4) simple_lock's removed. Discussion with several people reveals that the SMP locking primitives used in the VM system aren't likely the mechanism that we'll be adopting. Even if it were, the locking that was in the code was very inadequate and would have to be mostly re-done anyway. The locking in a uni-processor kernel was a no-op but went a long way toward making the code difficult to read and debug. 5) Places that attempted to kludge-up the fact that we don't have kernel thread support have been fixed to reflect the reality that we are really dealing with processes, not threads. The VM system didn't have complete thread support, so the comments and mis-named routines were just wrong. We now use tsleep and wakeup directly in the lock routines, for instance. 6) Where appropriate, the pagers have been improved, especially in the pager_alloc routines. Most of the pager_allocs have been rewritten and are now faster and easier to maintain. 7) The pagedaemon pageout clustering algorithm has been rewritten and now tries harder to output an even number of pages before and after the requested page. This is sort of the reverse of the ideal pagein algorithm and should provide better overall performance. 8) Unnecessary (incorrect) casts to caddr_t in calls to tsleep & wakeup have been removed. Some other unnecessary casts have also been removed. 9) Some almost useless debugging code removed. 10) Terminology of shadow objects vs. backing objects straightened out. The fact that the vm_object data structure escentially had this backwards really confused things. The use of "shadow" and "backing object" throughout the code is now internally consistent and correct in the Mach terminology. 11) Several minor bug fixes, including one in the vm daemon that caused 0 RSS objects to not get purged as intended. 12) A "default pager" has now been created which cleans up the transition of objects to the "swap" type. The previous checks throughout the code for swp->pg_data != NULL were really ugly. This change also provides the rudiments for future backing of "anonymous" memory by something other than the swap pager (via the vnode pager, for example), and it allows the decision about which of these pagers to use to be made dynamically (although will need some additional decision code to do this, of course). 13) (dyson) MAP_COPY has been deprecated and the corresponding "copy object" code has been removed. MAP_COPY was undocumented and non- standard. It was furthermore broken in several ways which caused its behavior to degrade to MAP_PRIVATE. Binaries that use MAP_COPY will continue to work correctly, but via the slightly different semantics of MAP_PRIVATE. 14) (dyson) Sharing maps have been removed. It's marginal usefulness in a threads design can be worked around in other ways. Both #12 and #13 were done to simplify the code and improve readability and maintain- ability. (As were most all of these changes) TODO: 1) Rewrite most of the vnode pager to use VOP_GETPAGES/PUTPAGES. Doing this will reduce the vnode pager to a mere fraction of its current size. 2) Rewrite vm_fault and the swap/vnode pagers to use the clustering information provided by the new haspage pager interface. This will substantially reduce the overhead by eliminating a large number of VOP_BMAP() calls. The VOP_BMAP() filesystem interface should be improved to provide both a "behind" and "ahead" indication of contiguousness. 3) Implement the extended features of pager_haspage in swap_pager_haspage(). It currently just says 0 pages ahead/behind. 4) Re-implement the swap device (swstrategy) in a more elegant way, perhaps via a much more general mechanism that could also be used for disk striping of regular filesystems. 5) Do something to improve the architecture of vm_object_collapse(). The fact that it makes calls into the swap pager and knows too much about how the swap pager operates really bothers me. It also doesn't allow for collapsing of non-swap pager objects ("unnamed" objects backed by other pagers). Notes: svn path=/head/; revision=9507
* Fix standards conformance bugs in <signal.h>:Bruce Evans1995-06-281-6/+8
| | | | | | | | | | | | | | | | | | | | | | | | include/signal.h: There was massive namespace pollution from including <sys/types.h>. POSIX functions were declared even when _ANSI_SOURCE is defined. sys.sys/signal.h: NSIG was declared even if _ANSI_SOURCE or _POSIX_SOURCE is defined. sig_atomic_t wasn't declared if _POSIX_SOURCE is defined. Declare a typedef for signal handling functions and use it to unobfuscate declarations and to avoid half-baked function types that cause unwanted compiler warnings at certain warning levels. Fix confusing comment about SA_RESTART. sys/i386/include/signal.h: This has to be included to get the declaration of sig_atomic_t even when _ANSI_SOURCE is defined, so be more careful about polluting the ANSI namespace. Uniformize idempotency ifdefs. Notes: svn path=/head/; revision=9343
* Remove trailing whitespace.Rodney W. Grimes1995-05-307-28/+28
| | | | Notes: svn path=/head/; revision=8876
* Made "NMBCLUSTERS" calculation dynamic and fixed bogus use of "NMBCLUSTERS"David Greenman1995-05-251-2/+1
| | | | | | | | | | | | | | | in machdep.c (it should use the global nmbclusters). Moved the calculation of nmbclusters into conf/param.c (same place where nmbclusters has always been assigned), and made the calculation include an extra amount based on "maxusers". NMBCLUSTERS can still be overrided in the kernel config file as always, but this change will make that generally unnecessary. This fixes the "bug" reports from people who have misconfigured kernels seeing the network hang when the mbuf cluster pool runs out. Reviewed by: John Dyson Notes: svn path=/head/; revision=8748
* Added apersand constraint to make sure that the source and destinationDavid Greenman1995-05-141-2/+2
| | | | | | | | | | registers aren't combined. Reviewed by: Bruce Evans and David Greenman Submitted by: John Dyson Notes: svn path=/head/; revision=8521
* Add loadandclear(). It atomically loads a value from memory, clears theBruce Evans1995-05-111-1/+12
| | | | | | | value in memory and returns the original value. Notes: svn path=/head/; revision=8446
* Correct the definition for the (unused) cpu_setstack().David Greenman1995-05-041-2/+2
| | | | Notes: svn path=/head/; revision=8265
* Add and move declarations to fix all of the warnings from `gcc -Wimplicit'Bruce Evans1995-03-281-1/+2
| | | | | | | | (except in netccitt, netiso and netns) that I didn't notice when I fixed "all" such warnings before. Notes: svn path=/head/; revision=7430
* Removed declaration of pmap_changebit()...it is no longer exported.David Greenman1995-03-261-2/+1
| | | | | | | Submitted by: John Dyson Notes: svn path=/head/; revision=7403
* Add and move declarations to fix all of the warnings from `gcc -Wimplicit'Bruce Evans1995-03-164-12/+82
| | | | | | | | | (except in netccitt, netiso and netns) and most of the warnings from `gcc -Wnested-externs'. Fix all the bugs found. There were no serious ones. Notes: svn path=/head/; revision=7090
* Preserve reverse link integraty while doing the queue insertion.David Greenman1995-03-031-2/+2
| | | | Notes: svn path=/head/; revision=6865
* Fix syntax errors in #ifdefed out code.Bruce Evans1995-02-161-3/+3
| | | | Notes: svn path=/head/; revision=6503
* First attempt to run linux binaries. This is only the changes needed toSøren Schmidt1995-02-141-2/+2
| | | | | | | | | the generic kernel. The actual emulator is a separate LKM. (not finished yet, sorry). Submitted by: sos@freebsd.org & sef@kithrup.com Notes: svn path=/head/; revision=6380
* Whoops! back out last commit partly.Poul-Henning Kamp1995-02-141-3/+1
| | | | Notes: svn path=/head/; revision=6369
* YFfix.Poul-Henning Kamp1995-02-141-2/+9
| | | | Notes: svn path=/head/; revision=6368
* susword -> systm.hPoul-Henning Kamp1995-02-141-2/+1
| | | | Notes: svn path=/head/; revision=6367
* Moved various pmap 'bit' test/set functions back into real functions; gccDavid Greenman1995-01-241-38/+1
| | | | | | | | | generates better code at the expense of more of it. Submitted by: John Dyson Notes: svn path=/head/; revision=5838
* Fix security holes in sigreturn(), ptrace() and procfs. sigreturn()Bruce Evans1995-01-142-22/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | attempted to check for insecure and fatal eflags and segment selectors, but missed many cases and got the IOPL check back to front. The other syscalls didn't check at all. sys_process.c, machdep.c: Only allow PT_WRITE_U to write to the registers (ordinary and FP). psl.h, locore.s, machdep.c: Eliminate PSL_MBZ, PSL_MBO and PSL_USERCLR. We are not supposed to assume anything about the reserved bits. Use PSL_USERCHANGE and PSL_KERNEL instead. Rename PSL_USERSET to PSL_USER. exception.s: Define a private label for use by doreti when returning to user mode fails. machdep.c: In syscalls, allow changing only the eflags that can be changed on 486's in user mode (no longer attempt to allow benign IOPL changes; allow changing the nasty PSL_NT; don't allow changing the i586 bits). Don't attempt to check all the cases involving invalid selectors and %eip's. Just check for privilege violations and let the invalid things cause a trap. procfs_machdep.c: Call the ptrace register functions to do all the work for reading and writing ordinary registers and for single stepping. trap.c: Ignore traps caused by PSL_NT being set. Previously, users could cause a fatal trap in user mode by setting PSL_NT and executing an iret, and a fatal trap in kernel mode by setting PSL_NT and making a syscall. PSL_NT was cleared too late and not in enough modes to fix the problem. Make all traps in user mode (except T_NMI) nonfatal. Recover from traps caused by attempting to load invalid user registers in doreti by restarting the traps so that they appear to occur in user mode. --- Fix bogons that I noticed while fixing the above: psl.h: Fix some comments. Uniformize idempotency ifdef. exception.s, machdep.c: Remove rsvd[0-14]. rsvd0 hasn't been reserved since the 486 came out. Replace rsvd0 by `align'. rsvd[0-11] used wrong (magic non-unique) trap numbers. Replace rsvd[1-14] by rsvd. locore.s: Enable alignment check flag on 486's and 586's. machdep.c: Use a better type for kstack[]. Use TFREGP() to find the registers. Reformat ptrace functions from SEF to something closer to KNF. procfs_machdep.c: The wrong pointer to the registers got fixed as a side effect. Implement reading and writing of FP registers. /proc/*/*regs now work (only) for processes that are in memory. Clean up comments. trap.c, trap.h: Remove unused trap types. Notes: svn path=/head/; revision=5603
* Enable define of CR0_AM to prepare for implementing alignment checking.Bruce Evans1995-01-141-7/+3
| | | | | | | Uniformize idempotency ifdef. Notes: svn path=/head/; revision=5594
* Declare a real `struct fpreg' to prepare for implementing reading andBruce Evans1995-01-141-6/+13
| | | | | | | | | writing of FP regs for procfs. Uniformize idempotency ifdef. Notes: svn path=/head/; revision=5593
* Remove reference to impossible trap type T_KDBTRAP. We don't supportBruce Evans1995-01-141-8/+9
| | | | | | | | | watchpoints. Uniformize idempotency ifdef. Notes: svn path=/head/; revision=5592
* These changes embody the support of the fully coherent merged VM buffer cache,David Greenman1995-01-092-4/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | much higher filesystem I/O performance, and much better paging performance. It represents the culmination of over 6 months of R&D. The majority of the merged VM/cache work is by John Dyson. The following highlights the most significant changes. Additionally, there are (mostly minor) changes to the various filesystem modules (nfs, msdosfs, etc) to support the new VM/buffer scheme. vfs_bio.c: Significant rewrite of most of vfs_bio to support the merged VM buffer cache scheme. The scheme is almost fully compatible with the old filesystem interface. Significant improvement in the number of opportunities for write clustering. vfs_cluster.c, vfs_subr.c Upgrade and performance enhancements in vfs layer code to support merged VM/buffer cache. Fixup of vfs_cluster to eliminate the bogus pagemove stuff. vm_object.c: Yet more improvements in the collapse code. Elimination of some windows that can cause list corruption. vm_pageout.c: Fixed it, it really works better now. Somehow in 2.0, some "enhancements" broke the code. This code has been reworked from the ground-up. vm_fault.c, vm_page.c, pmap.c, vm_object.c Support for small-block filesystems with merged VM/buffer cache scheme. pmap.c vm_map.c Dynamic kernel VM size, now we dont have to pre-allocate excessive numbers of kernel PTs. vm_glue.c Much simpler and more effective swapping code. No more gratuitous swapping. proc.h Fixed the problem that the p_lock flag was not being cleared on a fork. swap_pager.c, vnode_pager.c Removal of old vfs_bio cruft to support the past pseudo-coherency. Now the code doesn't need it anymore. machdep.c Changes to better support the parameter values for the merged VM/buffer cache scheme. machdep.c, kern_exec.c, vm_glue.c Implemented a seperate submap for temporary exec string space and another one to contain process upages. This eliminates all map fragmentation problems that previously existed. ffs_inode.c, ufs_inode.c, ufs_readwrite.c Changes for merged VM/buffer cache. Add "bypass" support for sneaking in on busy buffers. Submitted by: John Dyson and David Greenman Notes: svn path=/head/; revision=5455
* Corrected the list of volatile registers for outsb, outsw, and outsl.David Greenman1995-01-041-4/+4
| | | | | | | This bug caused my ethernet driver to break, among other things no doubt. Notes: svn path=/head/; revision=5378
* Replace sv_ex_tw by padding (it is no longer used; the tag word in sv_envBruce Evans1995-01-032-16/+26
| | | | | | | | | | | is valid). Expand comment about bogus padding for emulators. Update prototpe for npxinit(). Notes: svn path=/head/; revision=5350
* Add two more page table pages to keep 64MB machines happy.David Greenman1994-12-181-2/+2
| | | | Notes: svn path=/head/; revision=5143
* Disable CLKF_BASEPRI() again. I forgot to edit an unwanted change out ofBruce Evans1994-12-031-2/+2
| | | | | | | the diffs for the previous commit. Notes: svn path=/head/; revision=4931
* i386/exception.s,Bruce Evans1994-12-032-6/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Keep track of interrupt nesting level. It is normally 0 for syscalls and traps, but is fudged to 1 for their exit processing in case they metamorphose into an interrupt handler. i386/genassym.c; Remove support for the obsolete pcb_iml and pcb_cmap2. Add support for pcb_inl. i386/swtch.s: Fudge the interrupt nesting level across context switches and in the idle loop so that the work for preemptive context switches gets counted as interrupt time, the work for voluntary context switches gets counted mostly as system time (the part when curproc == 0 gets counted as interrupt time), and only truly idle time gets counted as idle time. Remove obsolete support (commented out and otherwise) for pcb_iml. Load curpcb just before curproc instead of just after so that curpcb is always valid if curproc is. A few more changes like this may fix tracing through context switches. Remove obsolete function swtch_to_inactive(). include/cpu.h: Use the new interrupt nesting level variable to implement a non-fake CLF_INTR() so that accounting for the interrupt state works. You can use top, iostat or (best) an up to date systat to see interrupt overheads. I see the expected huge interrupt overheads for ISA devices (on a 486DX/33, about 55% for an IDE drive transferring 1250K/sec and the same for a WD8013EBT network card transferring 1100K/sec). The huge interrupt overheads for serial devices are unfortunately normally invisible. include/pcb.h: Remove the obsolete pcb_iml and pcb_cmap2. Replace them by padding to preserve binary compatibility. Use part of the new padding for pcb_inl. isa/icu.s: isa/vector.s: Keep track of interrupt nesting level. Notes: svn path=/head/; revision=4929
* Declare "extern int bootverbose", so that device-drivers and othersPoul-Henning Kamp1994-11-261-1/+2
| | | | | | | easily can find it. Notes: svn path=/head/; revision=4818
* Add prototype for Debugger().Bruce Evans1994-11-151-1/+2
| | | | Notes: svn path=/head/; revision=4514
* Make gdt_segs[] public again for APM.Bruce Evans1994-11-151-2/+6
| | | | | | | | Make ldt[] public again and restore currentldt and _default_ldt for USER_LDT. Notes: svn path=/head/; revision=4501
* Rewrite almost everything.Bruce Evans1994-11-141-133/+300
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Alphabetize. Write all i/o functions in sleep so that we don't use anything from NetBSD. Restore the correct type of u_int for ports. This saves a whole cycle per i/o on 486's. Change `inline' back to __inline to avoid compiler warnings with -Wreally-all. Don't implement bdb() unless BDE_DEBUGGER is defined. Declare bdb_exists outside the function to avoid hundreds of compiler warnings. Let the compiler pick the register in asms if possible. Implement ffs() using inline asm(). gcc provides a slightly different one. It was broken in gcc-2.4.5 but works now. Declaring a correct version inline ensures getting a correct version. FreeBSD-1.1.5 has an slow inline version but FreeBSD-2.0 has a library version (which probably never gets used). Do inb() and outb() without using %edx for constant ports below 0x100. Remove casts to the same type in queue functions. Declare prototypes for everything implemented i386/*.s and also for everything that is normally implemented as an inline here (I don't like the current complete dependency on gcc). Ifdef out the prototypes that are declared elsewhere. THere should be a separate header to declare things implemented in i386/*.s, but then it would be harder to override declarations with inlines. ${UII} Notes: svn path=/head/; revision=4479
* Remove 1.5+K of bloat for unused idt entries.Bruce Evans1994-11-141-12/+19
| | | | | | | | | | | | | | | | Partly support BDE_DEBUGGER. Still broken by conflict with APM. Does nothing if BDE_DEBUGGER is not defined. Clean up prototypes and data declarations. Declare most of the segment functions that are implemented in support.s. Make data private in machdep.c if possible. Parenthesize expressions in macros properly! ${Uniformize idempotency ifdef}. Notes: svn path=/head/; revision=4473
* Declare inline functions as __inline and with new-style parameter listsBruce Evans1994-11-141-12/+13
| | | | | | | | | | | | to avoid compiler warnings. Clean up prototypes: alphabetize; don't use redundant `extern' or meaningless `extern inline'. Uniformize idempotency ifdef. Notes: svn path=/head/; revision=4471
* Don't declare DELAY() here. Callers should include <machine/clock.h>.Bruce Evans1994-11-091-2/+1
| | | | Notes: svn path=/head/; revision=4319
* Declare all functions exported by the npx driver.Bruce Evans1994-11-052-8/+34
| | | | | | | Uniformize idempotency ifdefs. Notes: svn path=/head/; revision=4175
* Declare the full uglyness of the interfaces to the clock driver (exceptBruce Evans1994-11-051-6/+46
| | | | | | | things declared in machine-independent files). Notes: svn path=/head/; revision=4174
* Disable the direct call from hardclock() to softclock(). SupportBruce Evans1994-11-051-8/+19
| | | | | | | | | | | | | | | | | for it is incomplete and buggy. There is no problem unless Xintr0() is reentered or should be reentered, but high clock interrupt frequencies for pcaudio cause Xintr0() to be reentered (or clock ticks to be lost when Xintr0() should have been reentered but wasn't), and we lose little by delaying the call to softclock(). Move declarations related to the clock driver to clock.h. Move declarations related to the npx driver to npx.h. Clean up the remaining declarations. Notes: svn path=/head/; revision=4173
* __386BSD__ -> __FreeBSD__Jordan K. Hubbard1994-11-042-4/+4
| | | | | | | | | I know that many of these entries are bogus and need to be revisited, but let's get the tree working again for now and then do a pass through looking at all the __FreeBSD__ entries, shall we? Notes: svn path=/head/; revision=4131
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