150 lines
4.0 KiB
C
150 lines
4.0 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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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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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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};
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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(virt_to_phys(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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