LXR linux/arch/arm/mach-mediatek/platsmp.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * arch/arm/mach-mediatek/platsmp.c
   4 *
   5 * Copyright (c) 2014 Mediatek Inc.
   6 * Author: Shunli Wang <shunli.wang@mediatek.com>
   7 *         Yingjoe Chen <yingjoe.chen@mediatek.com>
   8 */
   9#include <linux/io.h>
  10#include <linux/memblock.h>
  11#include <linux/of.h>
  12#include <linux/of_address.h>
  13#include <linux/string.h>
  14#include <linux/threads.h>
  15
  16#define MTK_MAX_CPU             8
  17#define MTK_SMP_REG_SIZE        0x1000
  18
  19struct mtk_smp_boot_info {
  20        unsigned long smp_base;
  21        unsigned int jump_reg;
  22        unsigned int core_keys[MTK_MAX_CPU - 1];
  23        unsigned int core_regs[MTK_MAX_CPU - 1];
  24};
  25
  26static const struct mtk_smp_boot_info mtk_mt8135_tz_boot = {
  27        0x80002000, 0x3fc,
  28        { 0x534c4131, 0x4c415332, 0x41534c33 },
  29        { 0x3f8, 0x3f8, 0x3f8 },
  30};
  31
  32static const struct mtk_smp_boot_info mtk_mt6589_boot = {
  33        0x10002000, 0x34,
  34        { 0x534c4131, 0x4c415332, 0x41534c33 },
  35        { 0x38, 0x3c, 0x40 },
  36};
  37
  38static const struct mtk_smp_boot_info mtk_mt7623_boot = {
  39        0x10202000, 0x34,
  40        { 0x534c4131, 0x4c415332, 0x41534c33 },
  41        { 0x38, 0x3c, 0x40 },
  42};
  43
  44static const struct of_device_id mtk_tz_smp_boot_infos[] __initconst = {
  45        { .compatible   = "mediatek,mt8135", .data = &mtk_mt8135_tz_boot },
  46        { .compatible   = "mediatek,mt8127", .data = &mtk_mt8135_tz_boot },
  47        { .compatible   = "mediatek,mt2701", .data = &mtk_mt8135_tz_boot },
  48        {},
  49};
  50
  51static const struct of_device_id mtk_smp_boot_infos[] __initconst = {
  52        { .compatible   = "mediatek,mt6589", .data = &mtk_mt6589_boot },
  53        { .compatible   = "mediatek,mt7623", .data = &mtk_mt7623_boot },
  54        { .compatible   = "mediatek,mt7629", .data = &mtk_mt7623_boot },
  55        {},
  56};
  57
  58static void __iomem *mtk_smp_base;
  59static const struct mtk_smp_boot_info *mtk_smp_info;
  60
  61static int mtk_boot_secondary(unsigned int cpu, struct task_struct *idle)
  62{
  63        if (!mtk_smp_base)
  64                return -EINVAL;
  65
  66        if (!mtk_smp_info->core_keys[cpu-1])
  67                return -EINVAL;
  68
  69        writel_relaxed(mtk_smp_info->core_keys[cpu-1],
  70                mtk_smp_base + mtk_smp_info->core_regs[cpu-1]);
  71
  72        arch_send_wakeup_ipi_mask(cpumask_of(cpu));
  73
  74        return 0;
  75}
  76
  77static void __init __mtk_smp_prepare_cpus(unsigned int max_cpus, int trustzone)
  78{
  79        int i, num;
  80        const struct of_device_id *infos;
  81
  82        if (trustzone) {
  83                num = ARRAY_SIZE(mtk_tz_smp_boot_infos);
  84                infos = mtk_tz_smp_boot_infos;
  85        } else {
  86                num = ARRAY_SIZE(mtk_smp_boot_infos);
  87                infos = mtk_smp_boot_infos;
  88        }
  89
  90        /* Find smp boot info for this SoC */
  91        for (i = 0; i < num; i++) {
  92                if (of_machine_is_compatible(infos[i].compatible)) {
  93                        mtk_smp_info = infos[i].data;
  94                        break;
  95                }
  96        }
  97
  98        if (!mtk_smp_info) {
  99                pr_err("%s: Device is not supported\n", __func__);
 100                return;
 101        }
 102
 103        if (trustzone) {
 104                /* smp_base(trustzone-bootinfo) is reserved by device tree */
 105                mtk_smp_base = phys_to_virt(mtk_smp_info->smp_base);
 106        } else {
 107                mtk_smp_base = ioremap(mtk_smp_info->smp_base, MTK_SMP_REG_SIZE);
 108                if (!mtk_smp_base) {
 109                        pr_err("%s: Can't remap %lx\n", __func__,
 110                                mtk_smp_info->smp_base);
 111                        return;
 112                }
 113        }
 114
 115        /*
 116         * write the address of slave startup address into the system-wide
 117         * jump register
 118         */
 119        writel_relaxed(__pa_symbol(secondary_startup_arm),
 120                        mtk_smp_base + mtk_smp_info->jump_reg);
 121}
 122
 123static void __init mtk_tz_smp_prepare_cpus(unsigned int max_cpus)
 124{
 125        __mtk_smp_prepare_cpus(max_cpus, 1);
 126}
 127
 128static void __init mtk_smp_prepare_cpus(unsigned int max_cpus)
 129{
 130        __mtk_smp_prepare_cpus(max_cpus, 0);
 131}
 132
 133static const struct smp_operations mt81xx_tz_smp_ops __initconst = {
 134        .smp_prepare_cpus = mtk_tz_smp_prepare_cpus,
 135        .smp_boot_secondary = mtk_boot_secondary,
 136};
 137CPU_METHOD_OF_DECLARE(mt81xx_tz_smp, "mediatek,mt81xx-tz-smp", &mt81xx_tz_smp_ops);
 138
 139static const struct smp_operations mt6589_smp_ops __initconst = {
 140        .smp_prepare_cpus = mtk_smp_prepare_cpus,
 141        .smp_boot_secondary = mtk_boot_secondary,
 142};
 143CPU_METHOD_OF_DECLARE(mt6589_smp, "mediatek,mt6589-smp", &mt6589_smp_ops);
 144