1/* $OpenBSD: multiproc.s,v 1.5 2014/01/26 17:40:09 miod Exp $ */ 2/* $NetBSD: multiproc.s,v 1.5 1999/12/16 20:17:23 thorpej Exp $ */ 3 4/*- 5 * Copyright (c) 1998 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 10 * NASA Ames Research Center. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34.file 4 __FILE__ 35.loc 4 __LINE__ 36 37/* 38 * Multiprocessor glue code. 39 */ 40 41 .text 42 43/* 44 * cpu_spinup_trampoline: 45 * 46 * We come here via the secondary processor's console. We simply 47 * make the function call look right, and call cpu_hatch() to finish 48 * starting up the processor. 49 * 50 * We are provided an argument in $27 (pv) (which will be our cpu_info). 51 */ 52NESTED_NOPROFILE(cpu_spinup_trampoline,0,0,ra,0,0) 53 mov pv, s0 /* squirrel away argument */ 54 55 br pv, 1f /* compute new GP */ 561: LDGP(pv) 57 58 /* Write new KGP. */ 59 mov gp, a0 60 call_pal PAL_OSF1_wrkgp /* clobbers a0, t0, t8-t11 */ 61 62 /* Store our CPU info in SysValue. */ 63 mov s0, a0 64 call_pal PAL_OSF1_wrval 65 66 /* Switch to this CPU's idle thread. */ 67 ldq a0, CPU_INFO_IDLE_PCB_PADDR(s0) 68 SWITCH_CONTEXT 69 70 /* Invalidate TLB and I-stream. */ 71 ldiq a0, -2 /* TBIA */ 72 call_pal PAL_OSF1_tbi 73 call_pal PAL_imb 74 75 /* Make sure the FPU is turned off. */ 76 mov zero, a0 77 call_pal PAL_OSF1_wrfen 78 79 /* Restore argument and call cpu_hatch() */ 80 mov s0, a0 81 CALL(cpu_hatch) 82 83 /* cpu_hatch() returned! Just halt (forever). */ 842: call_pal PAL_halt 85 br zero, 2b 86 END(cpu_spinup_trampoline) 87