960e65d23a
This is a very simple implementation of Qualcomm's SCM API. It is just the structure/field definitions and the atomic SCM call which doesn't use the structs yet - it uses the field definitions inside registers. I've tested that setting the cold boot address via the atomic API is fine - Linux does the same thing. But not all SCM calls can be done via the legacy API. This is a reimplementation based on the Linux qualcomm SCM legacy code and definitions. Tested: * Qualcomm IPQ4018 AP, as part of other changes for doing SMP bring-up Reviewed by: andrew, manu, imp Differential Revision: https://reviews.freebsd.org/D32723
89 lines
2.8 KiB
C
89 lines
2.8 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 <vm/pmap.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/smp.h>
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#include <arm/qualcomm/qcom_scm_defs.h>
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#include <arm/qualcomm/qcom_scm_legacy_defs.h>
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#include <arm/qualcomm/qcom_scm_legacy.h>
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#include <dev/psci/smccc.h>
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/*
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* Set the cold boot address for (later) a mask of CPUs.
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*
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* Don't set it for CPU0, that CPU is the boot CPU and is already alive.
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*
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* For now it sets it on CPU1..3.
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*
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* This works on the IPQ4019 as tested; the retval is 0x0.
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*/
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uint32_t
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qcom_scm_legacy_mp_set_cold_boot_address(vm_offset_t mp_entry_func)
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{
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struct arm_smccc_res res;
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int ret;
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int context_id;
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uint32_t scm_arg0 = QCOM_SCM_LEGACY_ATOMIC_ID(QCOM_SCM_SVC_BOOT,
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QCOM_SCM_BOOT_SET_ADDR, 2);
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uint32_t scm_arg1 = QCOM_SCM_FLAG_COLDBOOT_CPU1
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| QCOM_SCM_FLAG_COLDBOOT_CPU2
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| QCOM_SCM_FLAG_COLDBOOT_CPU3;
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uint32_t scm_arg2 = pmap_kextract((vm_offset_t)mp_entry_func);
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ret = arm_smccc_smc(scm_arg0, (uint32_t) &context_id, scm_arg1,
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scm_arg2, 0, 0, 0, 0, &res);
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if (ret == 0 && res.a0 == 0)
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return (0);
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printf("%s: called; error; ret=0x%08x; retval[0]=0x%08x\n",
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__func__, ret, res.a0);
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return (0);
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}
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