]> CyberLeo.Net >> Repos - FreeBSD/releng/10.2.git/blob - sys/arm/allwinner/a20/a20_mp.c
- Copy stable/10@285827 to releng/10.2 in preparation for 10.2-RC1
[FreeBSD/releng/10.2.git] / sys / arm / allwinner / a20 / a20_mp.c
1 /*-
2  * Copyright (c) 2014 Ganbold Tsagaankhuu <ganbold@freebsd.org>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24  */
25
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/bus.h>
31 #include <sys/kernel.h>
32 #include <sys/lock.h>
33 #include <sys/mutex.h>
34 #include <sys/smp.h>
35
36 #include <machine/smp.h>
37 #include <machine/fdt.h>
38 #include <machine/intr.h>
39
40 #define CPUCFG_BASE             0x01c25c00
41 #define CPUCFG_SIZE             0x400
42
43 #define CPU0_RST_CTL            0x40
44 #define CPU0_CTL                0x44
45 #define CPU0_STATUS             0x48
46 #define CPU1_RST_CTL            0x80
47 #define CPU1_CTL                0x84
48 #define CPU1_STATUS             0x88
49 #define CPUCFG_GENCTL           0x184
50 #define CPUCFG_P_REG0           0x1a4
51 #define CPU1_PWR_CLAMP          0x1b0
52 #define CPU1_PWROFF_REG         0x1b4
53 #define CPUCFG_DBGCTL0          0x1e0
54 #define CPUCFG_DBGCTL1          0x1e4
55
56 void
57 platform_mp_init_secondary(void)
58 {
59
60         gic_init_secondary();
61 }
62
63 void
64 platform_mp_setmaxid(void)
65 {
66         int ncpu;
67
68         if (mp_ncpus != 0)
69                 return;
70
71         /* Read current CP15 Cache Size ID Register */
72         __asm __volatile("mrc p15, 1, %0, c9, c0, 2" : "=r" (ncpu));
73         ncpu = ((ncpu >> 24) & 0x3) + 1;
74
75         mp_ncpus = ncpu;
76         mp_maxid = ncpu - 1;
77 }
78
79 int
80 platform_mp_probe(void)
81 {
82
83         if (mp_ncpus == 0)
84                 platform_mp_setmaxid();
85
86         return (mp_ncpus > 1);
87 }
88
89 void
90 platform_mp_start_ap(void)
91 {
92         bus_space_handle_t cpucfg;
93
94         uint32_t val;
95
96         if (bus_space_map(fdtbus_bs_tag, CPUCFG_BASE, CPUCFG_SIZE, 0,
97             &cpucfg) != 0)
98                 panic("Couldn't map the CPUCFG\n");
99
100         cpu_idcache_wbinv_all();
101         cpu_l2cache_wbinv_all();
102
103         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPUCFG_P_REG0,
104             pmap_kextract((vm_offset_t)mpentry));
105
106         /*
107          * Assert nCOREPORESET low and set L1RSTDISABLE low.
108          * Ensure DBGPWRDUP is set to LOW to prevent any external
109          * debug access to the processor.
110          */
111         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_RST_CTL, 0);
112
113         /* Set L1RSTDISABLE low */
114         val = bus_space_read_4(fdtbus_bs_tag, cpucfg, CPUCFG_GENCTL);
115         val &= ~(1 << 1);
116         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPUCFG_GENCTL, val);
117
118         /* Set DBGPWRDUP low */
119         val = bus_space_read_4(fdtbus_bs_tag, cpucfg, CPUCFG_DBGCTL1);
120         val &= ~(1 << 1);
121         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPUCFG_DBGCTL1, val);
122
123         /* Release power clamp */
124         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0xff);
125         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x7f);
126         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x3f);
127         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x1f);
128         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x0f);
129         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x07);
130         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x03);
131         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x01);
132         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x00);
133         DELAY(10000);
134
135         /* Clear power-off gating */
136         val = bus_space_read_4(fdtbus_bs_tag, cpucfg, CPU1_PWROFF_REG);
137         val &= ~(1 << 0);
138         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWROFF_REG, val);
139         DELAY(1000);
140
141         /* De-assert cpu core reset */
142         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_RST_CTL, 3);
143
144         /* Assert DBGPWRDUP signal */
145         val = bus_space_read_4(fdtbus_bs_tag, cpucfg, CPUCFG_DBGCTL1);
146         val |= (1 << 1);
147         bus_space_write_4(fdtbus_bs_tag, cpucfg, CPUCFG_DBGCTL1, val);
148
149         armv7_sev();
150         bus_space_unmap(fdtbus_bs_tag, cpucfg, CPUCFG_SIZE);
151 }
152
153 void
154 platform_ipi_send(cpuset_t cpus, u_int ipi)
155 {
156
157         pic_ipi_send(cpus, ipi);
158 }