147 lines
4.0 KiB
C
147 lines
4.0 KiB
C
/*-
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* Copyright (C) 2015 Daisuke Aoyama <aoyama@peach.ne.jp>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/smp.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/cpu.h>
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#include <machine/smp.h>
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#include <machine/bus.h>
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#include <machine/fdt.h>
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#include <machine/intr.h>
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#include <machine/platformvar.h>
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#include <arm/broadcom/bcm2835/bcm2836_mp.h>
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#ifdef DEBUG
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#define DPRINTF(fmt, ...) do { \
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printf("%s:%u: ", __func__, __LINE__); \
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printf(fmt, ##__VA_ARGS__); \
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} while (0)
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#else
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#define DPRINTF(fmt, ...)
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#endif
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#define ARM_LOCAL_BASE 0x40000000
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#define ARM_LOCAL_SIZE 0x00001000
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/* mailbox registers */
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#define MBOXINTRCTRL_CORE(n) (0x00000050 + (0x04 * (n)))
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#define MBOX0SET_CORE(n) (0x00000080 + (0x10 * (n)))
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#define MBOX1SET_CORE(n) (0x00000084 + (0x10 * (n)))
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#define MBOX2SET_CORE(n) (0x00000088 + (0x10 * (n)))
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#define MBOX3SET_CORE(n) (0x0000008C + (0x10 * (n)))
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#define MBOX0CLR_CORE(n) (0x000000C0 + (0x10 * (n)))
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#define MBOX1CLR_CORE(n) (0x000000C4 + (0x10 * (n)))
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#define MBOX2CLR_CORE(n) (0x000000C8 + (0x10 * (n)))
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#define MBOX3CLR_CORE(n) (0x000000CC + (0x10 * (n)))
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static bus_space_handle_t bs_periph;
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#define BSRD4(addr) \
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bus_space_read_4(fdtbus_bs_tag, bs_periph, (addr))
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#define BSWR4(addr, val) \
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bus_space_write_4(fdtbus_bs_tag, bs_periph, (addr), (val))
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void
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bcm2836_mp_setmaxid(platform_t plat)
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{
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DPRINTF("platform_mp_setmaxid\n");
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if (mp_ncpus != 0)
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return;
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mp_ncpus = 4;
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mp_maxid = mp_ncpus - 1;
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DPRINTF("mp_maxid=%d\n", mp_maxid);
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}
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void
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bcm2836_mp_start_ap(platform_t plat)
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{
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uint32_t val;
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int i, retry;
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DPRINTF("platform_mp_start_ap\n");
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/* initialize */
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if (bus_space_map(fdtbus_bs_tag, ARM_LOCAL_BASE, ARM_LOCAL_SIZE,
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0, &bs_periph) != 0)
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panic("can't map local peripheral\n");
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for (i = 0; i < mp_ncpus; i++) {
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/* clear mailbox 0/3 */
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BSWR4(MBOX0CLR_CORE(i), 0xffffffff);
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BSWR4(MBOX3CLR_CORE(i), 0xffffffff);
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}
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wmb();
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dcache_wbinv_poc_all();
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/* boot secondary CPUs */
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for (i = 1; i < mp_ncpus; i++) {
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/* set entry point to mailbox 3 */
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BSWR4(MBOX3SET_CORE(i),
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(uint32_t)pmap_kextract((vm_offset_t)mpentry));
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/* Firmware put cores in WFE state, need SEV to wake up. */
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dsb();
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sev();
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/* wait for bootup */
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retry = 1000;
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do {
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/* check entry point */
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val = BSRD4(MBOX3CLR_CORE(i));
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if (val == 0)
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break;
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DELAY(100);
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retry--;
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if (retry <= 0) {
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printf("can't start for CPU%d\n", i);
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break;
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}
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} while (1);
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/* dsb and sev */
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dsb();
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sev();
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/* recode AP in CPU map */
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CPU_SET(i, &all_cpus);
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}
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}
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