117 lines
3.3 KiB
C
117 lines
3.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2021 Adrian Chadd <adrian@FreeBSD.org>
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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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* 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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#include "opt_platform.h"
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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/bus.h>
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#include <sys/reboot.h>
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#include <sys/devmap.h>
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#include <sys/smp.h>
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#include <vm/vm.h>
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#include <machine/cpu.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <machine/machdep.h>
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#include <machine/platformvar.h>
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#include <machine/smp.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_cpu.h>
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#include <arm/qualcomm/ipq4018_machdep.h>
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#include <arm/qualcomm/qcom_scm_legacy.h>
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#include <arm/qualcomm/qcom_cpu_kpssv2.h>
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#include "platform_if.h"
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void
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ipq4018_mp_setmaxid(platform_t plat)
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{
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int ncpu;
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/* If we've already set the global vars don't bother to do it again. */
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if (mp_ncpus != 0)
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return;
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/* Read current CP15 Cache Size ID Register */
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ncpu = cp15_l2ctlr_get();
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ncpu = CPUV7_L2CTLR_NPROC(ncpu);
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mp_ncpus = ncpu;
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mp_maxid = ncpu - 1;
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printf("SMP: ncpu=%d\n", ncpu);
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}
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static bool
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ipq4018_start_ap(u_int id, phandle_t node, u_int addr_cells, pcell_t *arg)
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{
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/*
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* For the IPQ401x we assume the enable method is
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* "qcom,kpss-acc-v2". If this path gets turned into
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* something more generic for other 32 bit qualcomm
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* SoCs then we'll likely want to turn this into a
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* switch based on "enable-method".
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*/
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return qcom_cpu_kpssv2_regulator_start(id, node);
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}
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void
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ipq4018_mp_start_ap(platform_t plat)
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{
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int ret;
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/*
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* First step - SCM call to set the cold boot address to mpentry, so
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* CPUs hopefully start in the MP path.
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*/
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ret = qcom_scm_legacy_mp_set_cold_boot_address((vm_offset_t) mpentry);
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if (ret != 0)
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panic("%s: Couldn't set cold boot address via SCM "
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"(error 0x%08x)", __func__, ret);
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/*
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* Next step - loop over the CPU nodes and do the per-CPU setup
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* required to power on the CPUs themselves.
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*/
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ofw_cpu_early_foreach(ipq4018_start_ap, true);
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/*
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* The next set of IPIs to the CPUs will wake them up and enter
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* mpentry.
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*/
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}
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