2 * Copyright (c) 2014 Ganbold Tsagaankhuu <ganbold@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
29 #include <sys/param.h>
30 #include <sys/systm.h>
32 #include <sys/kernel.h>
34 #include <sys/mutex.h>
37 #include <machine/smp.h>
38 #include <machine/fdt.h>
39 #include <machine/intr.h>
41 #define CPUCFG_BASE 0x01c25c00
42 #define CPUCFG_SIZE 0x400
44 #define CPU0_RST_CTL 0x40
46 #define CPU0_STATUS 0x48
47 #define CPU1_RST_CTL 0x80
49 #define CPU1_STATUS 0x88
50 #define CPUCFG_GENCTL 0x184
51 #define CPUCFG_P_REG0 0x1a4
52 #define CPU1_PWR_CLAMP 0x1b0
53 #define CPU1_PWROFF_REG 0x1b4
54 #define CPUCFG_DBGCTL0 0x1e0
55 #define CPUCFG_DBGCTL1 0x1e4
58 platform_mp_init_secondary(void)
65 platform_mp_setmaxid(void)
72 /* Read the number of cores from the CP15 L2 Control Register. */
73 __asm __volatile("mrc p15, 1, %0, c9, c0, 2" : "=r" (ncpu));
74 ncpu = ((ncpu >> 24) & 0x3) + 1;
81 platform_mp_probe(void)
85 platform_mp_setmaxid();
87 return (mp_ncpus > 1);
91 platform_mp_start_ap(void)
93 bus_space_handle_t cpucfg;
97 if (bus_space_map(fdtbus_bs_tag, CPUCFG_BASE, CPUCFG_SIZE, 0,
99 panic("Couldn't map the CPUCFG\n");
101 cpu_idcache_wbinv_all();
102 cpu_l2cache_wbinv_all();
104 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPUCFG_P_REG0,
105 pmap_kextract((vm_offset_t)mpentry));
108 * Assert nCOREPORESET low and set L1RSTDISABLE low.
109 * Ensure DBGPWRDUP is set to LOW to prevent any external
110 * debug access to the processor.
112 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_RST_CTL, 0);
114 /* Set L1RSTDISABLE low */
115 val = bus_space_read_4(fdtbus_bs_tag, cpucfg, CPUCFG_GENCTL);
117 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPUCFG_GENCTL, val);
119 /* Set DBGPWRDUP low */
120 val = bus_space_read_4(fdtbus_bs_tag, cpucfg, CPUCFG_DBGCTL1);
122 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPUCFG_DBGCTL1, val);
124 /* Release power clamp */
125 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0xff);
126 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x7f);
127 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x3f);
128 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x1f);
129 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x0f);
130 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x07);
131 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x03);
132 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x01);
133 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWR_CLAMP, 0x00);
136 /* Clear power-off gating */
137 val = bus_space_read_4(fdtbus_bs_tag, cpucfg, CPU1_PWROFF_REG);
139 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_PWROFF_REG, val);
142 /* De-assert cpu core reset */
143 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPU1_RST_CTL, 3);
145 /* Assert DBGPWRDUP signal */
146 val = bus_space_read_4(fdtbus_bs_tag, cpucfg, CPUCFG_DBGCTL1);
148 bus_space_write_4(fdtbus_bs_tag, cpucfg, CPUCFG_DBGCTL1, val);
151 bus_space_unmap(fdtbus_bs_tag, cpucfg, CPUCFG_SIZE);
155 platform_ipi_send(cpuset_t cpus, u_int ipi)
158 pic_ipi_send(cpus, ipi);