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 19 struct 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 26 static const struct mtk_smp_boot_info mtk_mt8135_tz_boot = { 27 0x80002000, 0x3fc, 28 { 0x534c4131, 0x4c415332, 0x41534c33 }, 29 { 0x3f8, 0x3f8, 0x3f8 }, 30 }; 31 32 static const struct mtk_smp_boot_info mtk_mt6572_boot = { 33 0x10001400, 0x08, 34 { 0x534c4131 }, 35 { 0x0c }, 36 }; 37 38 static const struct mtk_smp_boot_info mtk_mt6589_boot = { 39 0x10002000, 0x34, 40 { 0x534c4131, 0x4c415332, 0x41534c33 }, 41 { 0x38, 0x3c, 0x40 }, 42 }; 43 44 static const struct mtk_smp_boot_info mtk_mt7623_boot = { 45 0x10202000, 0x34, 46 { 0x534c4131, 0x4c415332, 0x41534c33 }, 47 { 0x38, 0x3c, 0x40 }, 48 }; 49 50 static const struct of_device_id mtk_tz_smp_boot_infos[] __initconst = { 51 { .compatible = "mediatek,mt8135", .data = &mtk_mt8135_tz_boot }, 52 { .compatible = "mediatek,mt8127", .data = &mtk_mt8135_tz_boot }, 53 { .compatible = "mediatek,mt2701", .data = &mtk_mt8135_tz_boot }, 54 {}, 55 }; 56 57 static const struct of_device_id mtk_smp_boot_infos[] __initconst = { 58 { .compatible = "mediatek,mt6572", .data = &mtk_mt6572_boot }, 59 { .compatible = "mediatek,mt6589", .data = &mtk_mt6589_boot }, 60 { .compatible = "mediatek,mt7623", .data = &mtk_mt7623_boot }, 61 { .compatible = "mediatek,mt7629", .data = &mtk_mt7623_boot }, 62 {}, 63 }; 64 65 static void __iomem *mtk_smp_base; 66 static const struct mtk_smp_boot_info *mtk_smp_info; 67 68 static int mtk_boot_secondary(unsigned int cpu, struct task_struct *idle) 69 { 70 if (!mtk_smp_base) 71 return -EINVAL; 72 73 if (!mtk_smp_info->core_keys[cpu-1]) 74 return -EINVAL; 75 76 writel_relaxed(mtk_smp_info->core_keys[cpu-1], 77 mtk_smp_base + mtk_smp_info->core_regs[cpu-1]); 78 79 arch_send_wakeup_ipi_mask(cpumask_of(cpu)); 80 81 return 0; 82 } 83 84 static void __init __mtk_smp_prepare_cpus(unsigned int max_cpus, int trustzone) 85 { 86 int i, num; 87 const struct of_device_id *infos; 88 89 if (trustzone) { 90 num = ARRAY_SIZE(mtk_tz_smp_boot_infos); 91 infos = mtk_tz_smp_boot_infos; 92 } else { 93 num = ARRAY_SIZE(mtk_smp_boot_infos); 94 infos = mtk_smp_boot_infos; 95 } 96 97 /* Find smp boot info for this SoC */ 98 for (i = 0; i < num; i++) { 99 if (of_machine_is_compatible(infos[i].compatible)) { 100 mtk_smp_info = infos[i].data; 101 break; 102 } 103 } 104 105 if (!mtk_smp_info) { 106 pr_err("%s: Device is not supported\n", __func__); 107 return; 108 } 109 110 if (trustzone) { 111 /* smp_base(trustzone-bootinfo) is reserved by device tree */ 112 mtk_smp_base = phys_to_virt(mtk_smp_info->smp_base); 113 } else { 114 mtk_smp_base = ioremap(mtk_smp_info->smp_base, MTK_SMP_REG_SIZE); 115 if (!mtk_smp_base) { 116 pr_err("%s: Can't remap %lx\n", __func__, 117 mtk_smp_info->smp_base); 118 return; 119 } 120 } 121 122 /* 123 * write the address of slave startup address into the system-wide 124 * jump register 125 */ 126 writel_relaxed(__pa_symbol(secondary_startup_arm), 127 mtk_smp_base + mtk_smp_info->jump_reg); 128 } 129 130 static void __init mtk_tz_smp_prepare_cpus(unsigned int max_cpus) 131 { 132 __mtk_smp_prepare_cpus(max_cpus, 1); 133 } 134 135 static void __init mtk_smp_prepare_cpus(unsigned int max_cpus) 136 { 137 __mtk_smp_prepare_cpus(max_cpus, 0); 138 } 139 140 static const struct smp_operations mt81xx_tz_smp_ops __initconst = { 141 .smp_prepare_cpus = mtk_tz_smp_prepare_cpus, 142 .smp_boot_secondary = mtk_boot_secondary, 143 }; 144 CPU_METHOD_OF_DECLARE(mt81xx_tz_smp, "mediatek,mt81xx-tz-smp", &mt81xx_tz_smp_ops); 145 146 static const struct smp_operations mt6589_smp_ops __initconst = { 147 .smp_prepare_cpus = mtk_smp_prepare_cpus, 148 .smp_boot_secondary = mtk_boot_secondary, 149 }; 150 CPU_METHOD_OF_DECLARE(mt6589_smp, "mediatek,mt6589-smp", &mt6589_smp_ops); 151