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File: [local] / sys / arch / amd64 / amd64 / mp_setperf.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:05:03 2008 UTC (16 years, 6 months ago) by nbrk
Import of OpenBSD 4.2 release kernel tree with initial code to support Jornada 720/728, StrongARM 1110-based handheld PC. At this point kernel roots on NFS and boots into vfs_mountroot() and traps. What is supported: - glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode (needs some palette tweaks for non black/white/blue colors, i think) - saic, SA11x0 interrupt controller (needs cleanup) - sacom, SA11x0 UART (supported only as boot console for now) - SA11x0 GPIO controller fully supported (but can't handle multiple interrupt handlers on one gpio pin) - sassp, SSP port on SA11x0 that attaches spibus - Jornada microcontroller (jmcu) to control kbd, battery, etc throught the SPI bus (wskbd attaches on jmcu, but not tested) - tod functions seem work - initial code for SA-1111 (chip companion) : this is TODO Next important steps, i think: - gpio and intc on sa1111 - pcmcia support for sa11x0 (and sa1111 help logic) - REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs) - root on wd0! (using already supported PCMCIA-ATA) |
/* $OpenBSD: mp_setperf.c,v 1.1 2007/05/06 03:37:08 gwk Exp $ */ /* * Copyright (c) 2007 Gordon Willem Klok <gwk@openbsd.org> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <sys/param.h> #include <sys/systm.h> #include <sys/sysctl.h> #include <sys/mutex.h> #include <machine/cpu.h> #include <machine/intr.h> struct mutex setperf_mp_mutex = MUTEX_INITIALIZER(IPL_HIGH); /* underlying setperf mechanism e.g. k8_powernow_setperf() */ void (*ul_setperf)(int); #define MP_SETPERF_STEADY 0 /* steady state - normal operation */ #define MP_SETPERF_INTRANSIT 1 /* in transition */ #define MP_SETPERF_PROCEED 2 /* proceed with transition */ #define MP_SETPERF_FINISH 3 /* return from IPI */ /* protected by setperf_mp_mutex */ volatile int mp_setperf_state = MP_SETPERF_STEADY; volatile int mp_perflevel; void mp_setperf(int); void mp_setperf(int level) { CPU_INFO_ITERATOR cii; struct cpu_info *ci; int notready, s; if (mp_setperf_state == MP_SETPERF_STEADY) { mtx_enter(&setperf_mp_mutex); mp_perflevel = level; curcpu()->ci_setperf_state = CI_SETPERF_INTRANSIT; /* ask all other processors to drop what they are doing */ CPU_INFO_FOREACH(cii, ci) { if (ci->ci_setperf_state != CI_SETPERF_INTRANSIT) { ci->ci_setperf_state = CI_SETPERF_SHOULDSTOP; x86_send_ipi(ci, X86_IPI_SETPERF); } } /* Loop until all processors report ready */ do { CPU_INFO_FOREACH(cii, ci) { if ((notready = (ci->ci_setperf_state != CI_SETPERF_INTRANSIT))) break; } } while (notready); mp_setperf_state = MP_SETPERF_PROCEED; /* release the hounds */ s = splipi(); ul_setperf(mp_perflevel); splx(s); curcpu()->ci_setperf_state = CI_SETPERF_DONE; /* Loop until all processors report done */ do { CPU_INFO_FOREACH(cii, ci) { if ((notready = (ci->ci_setperf_state != CI_SETPERF_DONE))) break; } } while (notready); mp_setperf_state = MP_SETPERF_FINISH; /* delay a little for potential straglers */ DELAY(2); curcpu()->ci_setperf_state = CI_SETPERF_READY; mp_setperf_state = MP_SETPERF_STEADY; /* restore normallity */ mtx_leave(&setperf_mp_mutex); } } void x86_setperf_ipi(struct cpu_info *ci) { if (ci->ci_setperf_state == CI_SETPERF_SHOULDSTOP) ci->ci_setperf_state = CI_SETPERF_INTRANSIT; while (mp_setperf_state != MP_SETPERF_PROCEED) ; ul_setperf(mp_perflevel); ci->ci_setperf_state = CI_SETPERF_DONE; while (mp_setperf_state != MP_SETPERF_FINISH) ; ci->ci_setperf_state = CI_SETPERF_READY; } void mp_setperf_init() { CPU_INFO_ITERATOR cii; struct cpu_info *ci; if (!cpu_setperf) return; ul_setperf = cpu_setperf; cpu_setperf = mp_setperf; CPU_INFO_FOREACH(cii, ci) { ci->ci_setperf_state = CI_SETPERF_READY; } mtx_init(&setperf_mp_mutex, IPL_HIGH); }