mp_cpudep.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2008-2009 Semihalf, Rafal Jaworowski
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: stable/11/sys/powerpc/booke/mp_cpudep.c 330897 2018-03-14 03:19:51Z eadler $");
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/kernel.h>
35#include <sys/bus.h>
36#include <sys/pcpu.h>
37#include <sys/proc.h>
38#include <sys/smp.h>
39
40#include <machine/pcb.h>
41#include <machine/psl.h>
42#include <machine/smp.h>
43#include <machine/spr.h>
44
45extern void dcache_enable(void);
46extern void dcache_inval(void);
47extern void icache_enable(void);
48extern void icache_inval(void);
49
50volatile void *ap_pcpu;
51
52uintptr_t
53cpudep_ap_bootstrap()
54{
55	uint32_t msr, sp, csr;
56
57	/* Enable L1 caches */
58	csr = mfspr(SPR_L1CSR0);
59	if ((csr & L1CSR0_DCE) == 0) {
60		dcache_inval();
61		dcache_enable();
62	}
63
64	csr = mfspr(SPR_L1CSR1);
65	if ((csr & L1CSR1_ICE) == 0) {
66		icache_inval();
67		icache_enable();
68	}
69
70	/* Set MSR */
71	msr = PSL_ME;
72	mtmsr(msr);
73
74	/* Assign pcpu fields, return ptr to this AP's idle thread kstack */
75	pcpup->pc_curthread = pcpup->pc_idlethread;
76#ifdef __powerpc64__
77	__asm __volatile("mr 13,%0" :: "r"(pcpup->pc_curthread));
78#else
79	__asm __volatile("mr 2,%0" :: "r"(pcpup->pc_curthread));
80#endif
81	pcpup->pc_curpcb = pcpup->pc_curthread->td_pcb;
82	sp = pcpup->pc_curpcb->pcb_sp;
83
84	/* XXX shouldn't the pcb_sp be checked/forced for alignment here?? */
85
86	return (sp);
87}
88
89void
90cpudep_ap_setup()
91{
92}
93