1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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/param.h>
28 #include <sys/systm.h>
29 #include <sys/bus.h>
30 #include <sys/lock.h>
31 #include <sys/mutex.h>
32 #include <sys/smp.h>
33
34 #include <vm/vm.h>
35 #include <vm/pmap.h>
36
37 #include <machine/cpu.h>
38 #include <machine/smp.h>
39 #include <machine/fdt.h>
40 #include <machine/intr.h>
41 #include <machine/platformvar.h>
42
43 #include <arm/ti/ti_smc.h>
44 #include <arm/ti/omap4/omap4_machdep.h>
45 #include <arm/ti/omap4/omap4_smc.h>
46
47 void
omap4_mp_setmaxid(platform_t plat)48 omap4_mp_setmaxid(platform_t plat)
49 {
50
51 if (mp_ncpus != 0)
52 return;
53 mp_maxid = 1;
54 mp_ncpus = 2;
55 }
56
57 void
omap4_mp_start_ap(platform_t plat)58 omap4_mp_start_ap(platform_t plat)
59 {
60 bus_addr_t scu_addr;
61
62 if (bus_space_map(fdtbus_bs_tag, 0x48240000, 0x1000, 0, &scu_addr) != 0)
63 panic("Couldn't map the SCU\n");
64 /* Enable the SCU */
65 *(volatile unsigned int *)scu_addr |= 1;
66 //*(volatile unsigned int *)(scu_addr + 0x30) |= 1;
67 dcache_wbinv_poc_all();
68
69 ti_smc0(0x200, 0xfffffdff, MODIFY_AUX_CORE_0);
70 ti_smc0(pmap_kextract((vm_offset_t)mpentry), 0, WRITE_AUX_CORE_1);
71 dsb();
72 sev();
73 bus_space_unmap(fdtbus_bs_tag, scu_addr, 0x1000);
74 }
75