1/* $NetBSD: multiproc.s,v 1.9 2001/05/05 02:20:53 thorpej Exp $ */ 2 3/*- 4 * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40__KERNEL_RCSID(5, "$NetBSD: multiproc.s,v 1.9 2001/05/05 02:20:53 thorpej Exp $") 41 42/* 43 * Multiprocessor glue code. 44 */ 45 46 .text 47inc5: .stabs __FILE__,132,0,0,inc5; .loc 1 __LINE__ 48 49/* 50 * cpu_spinup_trampoline: 51 * 52 * We come here via the secondary processor's console. We simply 53 * make the function call look right, and call cpu_hatch() to finish 54 * starting up the processor. 55 * 56 * We are provided an argument in $27 (pv). It will be a pointer to 57 * our cpu_info. 58 */ 59NESTED_NOPROFILE(cpu_spinup_trampoline,0,0,ra,0,0) 60 mov pv, s0 /* squirrel away argument */ 61 62 br pv, 1f /* compute new GP */ 631: LDGP(pv) 64 65 /* Write new KGP. */ 66 mov gp, a0 67 call_pal PAL_OSF1_wrkgp 68 69 /* Store our CPU info in SysValue. */ 70 mov s0, a0 71 call_pal PAL_OSF1_wrval 72 73 /* Switch to this CPU's idle thread. */ 74 ldq a0, CPU_INFO_IDLE_PCB_PADDR(s0) 75 SWITCH_CONTEXT 76 77 /* Invalidate TLB and I-stream. */ 78 ldiq a0, -2 /* TBIA */ 79 call_pal PAL_OSF1_tbi 80 call_pal PAL_imb 81 82 /* Make sure the FPU is turned off. */ 83 mov zero, a0 84 call_pal PAL_OSF1_wrfen 85 86 /* Restore argument and call cpu_hatch() */ 87 mov s0, a0 88 CALL(cpu_hatch) 89 90 /* Acquire the scheduler lock, and then jump into the idle loop! */ 91 CALL(sched_lock_idle) 92 mov zero, s0 /* no outgoing proc */ 93 jmp zero, idle 94 95 END(cpu_spinup_trampoline) 96