2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2008-2009 Semihalf, Rafal Jaworowski
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
40 #include <machine/pcb.h>
41 #include <machine/psl.h>
42 #include <machine/smp.h>
43 #include <machine/spr.h>
45 extern void dcache_enable(void);
46 extern void dcache_inval(void);
47 extern void icache_enable(void);
48 extern void icache_inval(void);
50 volatile void *ap_pcpu;
58 /* Enable L1 caches */
59 csr = mfspr(SPR_L1CSR0);
60 if ((csr & L1CSR0_DCE) == 0) {
65 csr = mfspr(SPR_L1CSR1);
66 if ((csr & L1CSR1_ICE) == 0) {
73 msr = PSL_CM | PSL_ME;
79 /* Assign pcpu fields, return ptr to this AP's idle thread kstack */
80 pcpup->pc_curthread = pcpup->pc_idlethread;
82 __asm __volatile("mr 13,%0" :: "r"(pcpup->pc_curthread));
84 __asm __volatile("mr 2,%0" :: "r"(pcpup->pc_curthread));
86 pcpup->pc_curpcb = pcpup->pc_curthread->td_pcb;
87 sp = pcpup->pc_curpcb->pcb_sp;
89 /* XXX shouldn't the pcb_sp be checked/forced for alignment here?? */