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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 655 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
144 lines
3.7 KiB
C
144 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* arch/arm/mach-mediatek/platsmp.c
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*
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* Copyright (c) 2014 Mediatek Inc.
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* Author: Shunli Wang <shunli.wang@mediatek.com>
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* Yingjoe Chen <yingjoe.chen@mediatek.com>
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*/
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#include <linux/io.h>
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#include <linux/memblock.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/string.h>
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#include <linux/threads.h>
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#define MTK_MAX_CPU 8
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#define MTK_SMP_REG_SIZE 0x1000
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struct mtk_smp_boot_info {
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unsigned long smp_base;
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unsigned int jump_reg;
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unsigned int core_keys[MTK_MAX_CPU - 1];
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unsigned int core_regs[MTK_MAX_CPU - 1];
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};
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static const struct mtk_smp_boot_info mtk_mt8135_tz_boot = {
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0x80002000, 0x3fc,
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{ 0x534c4131, 0x4c415332, 0x41534c33 },
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{ 0x3f8, 0x3f8, 0x3f8 },
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};
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static const struct mtk_smp_boot_info mtk_mt6589_boot = {
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0x10002000, 0x34,
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{ 0x534c4131, 0x4c415332, 0x41534c33 },
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{ 0x38, 0x3c, 0x40 },
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};
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static const struct mtk_smp_boot_info mtk_mt7623_boot = {
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0x10202000, 0x34,
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{ 0x534c4131, 0x4c415332, 0x41534c33 },
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{ 0x38, 0x3c, 0x40 },
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};
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static const struct of_device_id mtk_tz_smp_boot_infos[] __initconst = {
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{ .compatible = "mediatek,mt8135", .data = &mtk_mt8135_tz_boot },
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{ .compatible = "mediatek,mt8127", .data = &mtk_mt8135_tz_boot },
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{ .compatible = "mediatek,mt2701", .data = &mtk_mt8135_tz_boot },
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{},
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};
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static const struct of_device_id mtk_smp_boot_infos[] __initconst = {
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{ .compatible = "mediatek,mt6589", .data = &mtk_mt6589_boot },
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{ .compatible = "mediatek,mt7623", .data = &mtk_mt7623_boot },
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{ .compatible = "mediatek,mt7629", .data = &mtk_mt7623_boot },
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{},
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};
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static void __iomem *mtk_smp_base;
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static const struct mtk_smp_boot_info *mtk_smp_info;
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static int mtk_boot_secondary(unsigned int cpu, struct task_struct *idle)
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{
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if (!mtk_smp_base)
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return -EINVAL;
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if (!mtk_smp_info->core_keys[cpu-1])
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return -EINVAL;
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writel_relaxed(mtk_smp_info->core_keys[cpu-1],
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mtk_smp_base + mtk_smp_info->core_regs[cpu-1]);
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arch_send_wakeup_ipi_mask(cpumask_of(cpu));
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return 0;
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}
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static void __init __mtk_smp_prepare_cpus(unsigned int max_cpus, int trustzone)
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{
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int i, num;
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const struct of_device_id *infos;
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if (trustzone) {
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num = ARRAY_SIZE(mtk_tz_smp_boot_infos);
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infos = mtk_tz_smp_boot_infos;
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} else {
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num = ARRAY_SIZE(mtk_smp_boot_infos);
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infos = mtk_smp_boot_infos;
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}
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/* Find smp boot info for this SoC */
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for (i = 0; i < num; i++) {
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if (of_machine_is_compatible(infos[i].compatible)) {
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mtk_smp_info = infos[i].data;
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break;
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}
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}
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if (!mtk_smp_info) {
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pr_err("%s: Device is not supported\n", __func__);
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return;
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}
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if (trustzone) {
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/* smp_base(trustzone-bootinfo) is reserved by device tree */
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mtk_smp_base = phys_to_virt(mtk_smp_info->smp_base);
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} else {
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mtk_smp_base = ioremap(mtk_smp_info->smp_base, MTK_SMP_REG_SIZE);
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if (!mtk_smp_base) {
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pr_err("%s: Can't remap %lx\n", __func__,
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mtk_smp_info->smp_base);
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return;
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}
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}
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/*
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* write the address of slave startup address into the system-wide
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* jump register
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*/
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writel_relaxed(__pa_symbol(secondary_startup_arm),
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mtk_smp_base + mtk_smp_info->jump_reg);
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}
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static void __init mtk_tz_smp_prepare_cpus(unsigned int max_cpus)
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{
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__mtk_smp_prepare_cpus(max_cpus, 1);
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}
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static void __init mtk_smp_prepare_cpus(unsigned int max_cpus)
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{
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__mtk_smp_prepare_cpus(max_cpus, 0);
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}
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static const struct smp_operations mt81xx_tz_smp_ops __initconst = {
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.smp_prepare_cpus = mtk_tz_smp_prepare_cpus,
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.smp_boot_secondary = mtk_boot_secondary,
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};
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CPU_METHOD_OF_DECLARE(mt81xx_tz_smp, "mediatek,mt81xx-tz-smp", &mt81xx_tz_smp_ops);
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static const struct smp_operations mt6589_smp_ops __initconst = {
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.smp_prepare_cpus = mtk_smp_prepare_cpus,
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.smp_boot_secondary = mtk_boot_secondary,
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};
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CPU_METHOD_OF_DECLARE(mt6589_smp, "mediatek,mt6589-smp", &mt6589_smp_ops);
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