FreeBSD source tree https://cgit-dev.freebsd.org/src-test2/atom?h=release%2F7.2.0_cvs 2009-05-01T02:51:58Z 2009-05-01T02:51:58Z Ken Smith kensmith@FreeBSD.org 2009-05-01T02:51:58Z urn:sha1:b205d83df7763ca1f099bce5ac12a05862a626c4 Approved by: re (implicit) This commit was manufactured to restore the state of the 7.2-RELEASE image. 2006-05-19T18:53:50Z Maxim Sobolev sobomax@FreeBSD.org 2006-05-19T18:53:50Z urn:sha1:aa1807d5d65555f7901135166cd8dca5033e1656 appropriate. Discussed with: jhb 2003-12-06T23:17:18Z Peter Wemm peter@FreeBSD.org 2003-12-06T23:17:18Z urn:sha1:62b689edc91d7912538ad832f08c288142c632e8 used on amd64, and were actually totally broken. They had the wrong calling conventions. I believe the i386 versions are going away too. Approved by: re (scottl) 2003-05-01T01:05:25Z Peter Wemm peter@FreeBSD.org 2003-05-01T01:05:25Z urn:sha1:afa8862328041298fe0c059d65cea406f92bad4b a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to attempt to get a stable base to start from. There is a lot missing still. Worth noting: - The kernel runs at 1GB in order to cheat with the pmap code. pmap uses a variation of the PAE code in order to avoid having to worry about 4 levels of page tables yet. - It boots in 64 bit "long mode" with a tiny trampoline embedded in the i386 loader. This simplifies locore.s greatly. - There are still quite a few fragments of i386-specific code that have not been translated yet, and some that I cheated and wrote dumb C versions of (bcopy etc). - It has both int 0x80 for syscalls (but using registers for argument passing, as is native on the amd64 ABI), and the 'syscall' instruction for syscalls. int 0x80 preserves all registers, 'syscall' does not. - I have tried to minimize looking at the NetBSD code, except in a couple of places (eg: to find which register they use to replace the trashed %rcx register in the syscall instruction). As a result, there is not a lot of similarity. I did look at NetBSD a few times while debugging to get some ideas about what I might have done wrong in my first attempt. 2002-03-28T15:14:23Z John Baldwin jhb@FreeBSD.org 2002-03-28T15:14:23Z urn:sha1:e6c838590e468e03f2f5b65a35c9c5dd9e6d6f95 these back later then can get them from the attic. Also, GC, some stale macros to acquire and release sleep mutexes in assembly. 2002-02-28T06:17:05Z Bosko Milekic bmilekic@FreeBSD.org 2002-02-28T06:17:05Z urn:sha1:71acb2477ffb80d0c3f4b3eb9a80be605e44a342 where necessary. Reviewed by: jake 2001-12-18T00:27:18Z John Baldwin jhb@FreeBSD.org 2001-12-18T00:27:18Z urn:sha1:7e1f6dfe9d7ac65419d57b36dee19cd1a3e996f5 - The MD functions critical_enter/exit are renamed to start with a cpu_ prefix. - MI wrapper functions critical_enter/exit maintain a per-thread nesting count and a per-thread critical section saved state set when entering a critical section while at nesting level 0 and restored when exiting to nesting level 0. This moves the saved state out of spin mutexes so that interlocking spin mutexes works properly. - Most low-level MD code that used critical_enter/exit now use cpu_critical_enter/exit. MI code such as device drivers and spin mutexes use the MI wrappers. Note that since the MI wrappers store the state in the current thread, they do not have any return values or arguments. - mtx_intr_enable() is replaced with a constant CRITICAL_FORK which is assigned to curthread->td_savecrit during fork_exit(). Tested on: i386, alpha 2001-09-12T08:38:13Z Julian Elischer julian@FreeBSD.org 2001-09-12T08:38:13Z urn:sha1:b40ce4165d5eb3a5de1515245055350ae3dbab8e 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 2001-06-02T08:17:42Z Poul-Henning Kamp phk@FreeBSD.org 2001-06-02T08:17:42Z urn:sha1:0d31cbfab7843ddfc6e23fa0782ef6f537993517 2001-03-28T02:40:47Z John Baldwin jhb@FreeBSD.org 2001-03-28T02:40:47Z urn:sha1:6283b7d01b8d947b8a57d635e61b7c4e22816f93 and change the u_int mtx_saveintr member of struct mtx to a critical_t mtx_savecrit. - On the alpha we no longer need a custom _get_spin_lock() macro to avoid an extra PAL call, so remove it. - Partially fix using mutexes with WITNESS in modules. Change all the _mtx_{un,}lock_{spin,}_flags() macros to accept explicit file and line parameters and rename them to use a prefix of two underscores. Inside of kern_mutex.c, generate wrapper functions for _mtx_{un,}lock_{spin,}_flags() (only using a prefix of one underscore) that are called from modules. The macros mtx_{un,}lock_{spin,}_flags() are mapped to the __mtx_* macros inside of the kernel to inline the usual case of mutex operations and map to the internal _mtx_* functions in the module case so that modules will use WITNESS and KTR logging if the kernel is compiled with support for it.