omap4_mp.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2012 Olivier Houchard.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/11/sys/arm/ti/omap4/omap4_mp.c 330897 2018-03-14 03:19:51Z eadler $");
29#include <sys/param.h>
30#include <sys/systm.h>
31#include <sys/bus.h>
32#include <sys/lock.h>
33#include <sys/mutex.h>
34#include <sys/smp.h>
35
36#include <vm/vm.h>
37#include <vm/pmap.h>
38
39#include <machine/cpu.h>
40#include <machine/smp.h>
41#include <machine/fdt.h>
42#include <machine/intr.h>
43
44#include <arm/ti/ti_smc.h>
45#include <arm/ti/omap4/omap4_smc.h>
46
47void
48platform_mp_setmaxid(void)
49{
50
51	mp_maxid = 1;
52	mp_ncpus = 2;
53}
54
55void
56platform_mp_start_ap(void)
57{
58	bus_addr_t scu_addr;
59
60	if (bus_space_map(fdtbus_bs_tag, 0x48240000, 0x1000, 0, &scu_addr) != 0)
61		panic("Couldn't map the SCU\n");
62	/* Enable the SCU */
63	*(volatile unsigned int *)scu_addr |= 1;
64	//*(volatile unsigned int *)(scu_addr + 0x30) |= 1;
65	dcache_wbinv_poc_all();
66
67	ti_smc0(0x200, 0xfffffdff, MODIFY_AUX_CORE_0);
68	ti_smc0(pmap_kextract((vm_offset_t)mpentry), 0, WRITE_AUX_CORE_1);
69	dsb();
70	sev();
71	bus_space_unmap(fdtbus_bs_tag, scu_addr, 0x1000);
72}
73