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("$FreeBSD$");
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, csr;
56	uintptr_t sp;
57
58	/* Enable L1 caches */
59	csr = mfspr(SPR_L1CSR0);
60	if ((csr & L1CSR0_DCE) == 0) {
61		dcache_inval();
62		dcache_enable();
63	}
64
65	csr = mfspr(SPR_L1CSR1);
66	if ((csr & L1CSR1_ICE) == 0) {
67		icache_inval();
68		icache_enable();
69	}
70
71	/* Set MSR */
72#ifdef __powerpc64__
73	msr = PSL_CM | PSL_ME;
74#else
75	msr = PSL_ME;
76#endif
77	mtmsr(msr);
78
79	/* Assign pcpu fields, return ptr to this AP's idle thread kstack */
80	pcpup->pc_curthread = pcpup->pc_idlethread;
81#ifdef __powerpc64__
82	__asm __volatile("mr 13,%0" :: "r"(pcpup->pc_curthread));
83#else
84	__asm __volatile("mr 2,%0" :: "r"(pcpup->pc_curthread));
85#endif
86	pcpup->pc_curpcb = pcpup->pc_curthread->td_pcb;
87	sp = pcpup->pc_curpcb->pcb_sp;
88
89	/* XXX shouldn't the pcb_sp be checked/forced for alignment here?? */
90
91	return (sp);
92}
93
94void
95cpudep_ap_setup()
96{
97}
98