Annotation of sys/arch/alpha/alpha/multiproc.s, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: multiproc.s,v 1.2 2000/11/08 19:16:59 ericj 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: * 3. All advertising materials mentioning features or use of this software
21: * must display the following acknowledgement:
22: * This product includes software developed by the NetBSD
23: * Foundation, Inc. and its contributors.
24: * 4. Neither the name of The NetBSD Foundation nor the names of its
25: * contributors may be used to endorse or promote products derived
26: * from this software without specific prior written permission.
27: *
28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38: * POSSIBILITY OF SUCH DAMAGE.
39: */
40:
41: __KERNEL_RCSID(5, "$NetBSD: multiproc.s,v 1.5 1999/12/16 20:17:23 thorpej Exp $")
42:
43: /*
44: * Multiprocessor glue code.
45: */
46:
47: .text
48: inc5: .stabs __FILE__,132,0,0,inc5; .loc 1 __LINE__
49:
50: /*
51: * cpu_spinup_trampoline:
52: *
53: * We come here via the secondary processor's console. We simply
54: * make the function call look right, and call cpu_hatch() to finish
55: * starting up the processor.
56: *
57: * We are provided an argument in $27 (pv) (which will be our cpu_info).
58: */
59: NESTED_NOPROFILE(cpu_spinup_trampoline,0,0,ra,0,0)
60: mov pv, s0 /* squirrel away argument */
61:
62: br pv, 1f /* compute new GP */
63: 1: LDGP(pv)
64:
65: /* Invalidate TLB and I-stream. */
66: ldiq a0, -2 /* TBIA */
67: call_pal PAL_OSF1_tbi
68: call_pal PAL_imb
69:
70: /* Load KGP with current GP. */
71: mov gp, a0
72: call_pal PAL_OSF1_wrkgp /* clobbers a0, t0, t8-t11 */
73:
74: /* Restore argument and write it in SysValue. */
75: mov s0, a0
76: call_pal PAL_OSF1_wrval
77:
78: /* Restore argument and call cpu_hatch() */
79: mov s0, a0
80: CALL(cpu_hatch)
81:
82: /* cpu_hatch() returned! Just halt (forever). */
83: 2: call_pal PAL_halt
84: br zero, 2b
85: END(cpu_spinup_trampoline)
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