1/* $NetBSD: multiproc.s,v 1.15 2020/09/04 03:53:12 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33__KERNEL_RCSID(5, "$NetBSD: multiproc.s,v 1.15 2020/09/04 03:53:12 thorpej Exp $") 34 35/* 36 * Multiprocessor glue code. 37 */ 38 39 .text 40inc5: .stabs __FILE__,132,0,0,inc5; .loc 1 __LINE__ 41 42/* 43 * cpu_spinup_trampoline: 44 * 45 * We come here via the secondary processor's console. We simply 46 * make the function call look right, and call cpu_hatch() to finish 47 * starting up the processor. 48 * 49 * We are provided an argument in $27 (pv). It will be a pointer to 50 * 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 61 62 /* Make sure the cpu_info and lwp reference each other. */ 63 ldq s1, CPU_INFO_IDLE_LWP(s0) 64 stq s0, L_CPU(s1) /* set lwp::l_cpu */ 65 66 /* Switch to this CPU's idle thread. */ 67 ldq a0, L_MD_PCBPADDR(s1) 68 call_pal PAL_OSF1_swpctx 69 70 SET_CURLWP(s1) 71 72 /* Invalidate TLB and I-stream. */ 73 ldiq a0, -2 /* TBIA */ 74 call_pal PAL_OSF1_tbi 75 call_pal PAL_imb 76 77 /* Make sure the FPU is turned off. */ 78 mov zero, a0 79 call_pal PAL_OSF1_wrfen 80 81 /* Restore argument and call cpu_hatch() */ 82 mov s0, a0 83 CALL(cpu_hatch) 84 85 /* enable all interrupts */ 86 mov zero, a0 87 call_pal PAL_OSF1_swpipl 88 /* Jump into the idle loop! */ 89 jmp zero, idle_loop 90 91 END(cpu_spinup_trampoline) 92