FreeBSD source tree https://cgit-dev.freebsd.org/src-test2/atom?h=release%2F6.2.0_cvs 2007-01-11T22:54:46Z 2007-01-11T22:54:46Z cvs2svn cvs2svn@FreeBSD.org 2007-01-11T22:54:46Z urn:sha1:201f78d6b90635d961fa373ecd706e3786333b7e 'RELENG_6_2_0_RELEASE'. This commit was manufactured to restore the state of the 6.2-RELEASE image. 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 2001-12-11T23:33:44Z John Baldwin jhb@FreeBSD.org 2001-12-11T23:33:44Z urn:sha1:0bbc882680ceece07eb134ddeb7fceffb59ea018 - 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 2001-06-16T07:14:07Z Benno Rice benno@FreeBSD.org 2001-06-16T07:14:07Z urn:sha1:d27f1d4c1253db023f670e2f8138c44a6f4a3621 us our first minimal glimpse of PowerPC support. With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising. We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage. Reviewed by: obrien, dfr 2001-06-02T08:17:42Z Poul-Henning Kamp phk@FreeBSD.org 2001-06-02T08:17:42Z urn:sha1:0d31cbfab7843ddfc6e23fa0782ef6f537993517 2001-04-18T21:47:48Z John Baldwin jhb@FreeBSD.org 2001-04-18T21:47:48Z urn:sha1:08b0f4f9082523293e6c10db1fa8a26b36a23083 on the x86. 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. 2001-03-09T07:24:17Z John Baldwin jhb@FreeBSD.org 2001-03-09T07:24:17Z urn:sha1:5db078a9be699a43ece06b5a6f200311fa048ca6 if we hold a spin mutex, since we can trivially get into deadlocks if we start switching out of processes that hold spinlocks. Checking to see if interrupts were disabled was a sort of cheap way of doing this since most of the time interrupts were only disabled when holding a spin lock. At least on the i386. To fix this properly, use a per-process counter p_spinlocks that counts the number of spin locks currently held, and instead of checking to see if interrupts are disabled in the witness code, check to see if we hold any spin locks. Since child processes always start up with the sched lock magically held in fork_exit(), we initialize p_spinlocks to 1 for child processes. Note that proc0 doesn't go through fork_exit(), so it starts with no spin locks held. Consulting from: cp 2001-02-22T15:45:49Z John Baldwin jhb@FreeBSD.org 2001-02-22T15:45:49Z urn:sha1:0246af0995060281ef73d15580630ef0a9217dc5 2001-02-10T02:15:18Z John Baldwin jhb@FreeBSD.org 2001-02-10T02:15:18Z urn:sha1:e109e2b4cd80d6e07208dcb1fad6d75bda75036a will be enabled when it is released.