1 /* 2 * arch/arm/mach-mediatek/platsmp.c 3 * 4 * Copyright (c) 2014 Mediatek Inc. 5 * Author: Shunli Wang <shunli.wang@mediatek.com> 6 * Yingjoe Chen <yingjoe.chen@mediatek.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 */ 18 #include <linux/io.h> 19 #include <linux/memblock.h> 20 #include <linux/of.h> 21 #include <linux/of_address.h> 22 #include <linux/string.h> 23 #include <linux/threads.h> 24 25 #define MTK_MAX_CPU 8 26 #define MTK_SMP_REG_SIZE 0x1000 27 28 struct mtk_smp_boot_info { 29 unsigned long smp_base; 30 unsigned int jump_reg; 31 unsigned int core_keys[MTK_MAX_CPU - 1]; 32 unsigned int core_regs[MTK_MAX_CPU - 1]; 33 }; 34 35 static const struct mtk_smp_boot_info mtk_mt8135_tz_boot = { 36 0x80002000, 0x3fc, 37 { 0x534c4131, 0x4c415332, 0x41534c33 }, 38 { 0x3f8, 0x3f8, 0x3f8 }, 39 }; 40 41 static const struct mtk_smp_boot_info mtk_mt6589_boot = { 42 0x10002000, 0x34, 43 { 0x534c4131, 0x4c415332, 0x41534c33 }, 44 { 0x38, 0x3c, 0x40 }, 45 }; 46 47 static const struct mtk_smp_boot_info mtk_mt7623_boot = { 48 0x10202000, 0x34, 49 { 0x534c4131, 0x4c415332, 0x41534c33 }, 50 { 0x38, 0x3c, 0x40 }, 51 }; 52 53 static const struct of_device_id mtk_tz_smp_boot_infos[] __initconst = { 54 { .compatible = "mediatek,mt8135", .data = &mtk_mt8135_tz_boot }, 55 { .compatible = "mediatek,mt8127", .data = &mtk_mt8135_tz_boot }, 56 { .compatible = "mediatek,mt2701", .data = &mtk_mt8135_tz_boot }, 57 {}, 58 }; 59 60 static const struct of_device_id mtk_smp_boot_infos[] __initconst = { 61 { .compatible = "mediatek,mt6589", .data = &mtk_mt6589_boot }, 62 { .compatible = "mediatek,mt7623", .data = &mtk_mt7623_boot }, 63 { .compatible = "mediatek,mt7623a", .data = &mtk_mt7623_boot }, 64 {}, 65 }; 66 67 static void __iomem *mtk_smp_base; 68 static const struct mtk_smp_boot_info *mtk_smp_info; 69 70 static int mtk_boot_secondary(unsigned int cpu, struct task_struct *idle) 71 { 72 if (!mtk_smp_base) 73 return -EINVAL; 74 75 if (!mtk_smp_info->core_keys[cpu-1]) 76 return -EINVAL; 77 78 writel_relaxed(mtk_smp_info->core_keys[cpu-1], 79 mtk_smp_base + mtk_smp_info->core_regs[cpu-1]); 80 81 arch_send_wakeup_ipi_mask(cpumask_of(cpu)); 82 83 return 0; 84 } 85 86 static void __init __mtk_smp_prepare_cpus(unsigned int max_cpus, int trustzone) 87 { 88 int i, num; 89 const struct of_device_id *infos; 90 91 if (trustzone) { 92 num = ARRAY_SIZE(mtk_tz_smp_boot_infos); 93 infos = mtk_tz_smp_boot_infos; 94 } else { 95 num = ARRAY_SIZE(mtk_smp_boot_infos); 96 infos = mtk_smp_boot_infos; 97 } 98 99 /* Find smp boot info for this SoC */ 100 for (i = 0; i < num; i++) { 101 if (of_machine_is_compatible(infos[i].compatible)) { 102 mtk_smp_info = infos[i].data; 103 break; 104 } 105 } 106 107 if (!mtk_smp_info) { 108 pr_err("%s: Device is not supported\n", __func__); 109 return; 110 } 111 112 if (trustzone) { 113 /* smp_base(trustzone-bootinfo) is reserved by device tree */ 114 mtk_smp_base = phys_to_virt(mtk_smp_info->smp_base); 115 } else { 116 mtk_smp_base = ioremap(mtk_smp_info->smp_base, MTK_SMP_REG_SIZE); 117 if (!mtk_smp_base) { 118 pr_err("%s: Can't remap %lx\n", __func__, 119 mtk_smp_info->smp_base); 120 return; 121 } 122 } 123 124 /* 125 * write the address of slave startup address into the system-wide 126 * jump register 127 */ 128 writel_relaxed(__pa_symbol(secondary_startup_arm), 129 mtk_smp_base + mtk_smp_info->jump_reg); 130 } 131 132 static void __init mtk_tz_smp_prepare_cpus(unsigned int max_cpus) 133 { 134 __mtk_smp_prepare_cpus(max_cpus, 1); 135 } 136 137 static void __init mtk_smp_prepare_cpus(unsigned int max_cpus) 138 { 139 __mtk_smp_prepare_cpus(max_cpus, 0); 140 } 141 142 static const struct smp_operations mt81xx_tz_smp_ops __initconst = { 143 .smp_prepare_cpus = mtk_tz_smp_prepare_cpus, 144 .smp_boot_secondary = mtk_boot_secondary, 145 }; 146 CPU_METHOD_OF_DECLARE(mt81xx_tz_smp, "mediatek,mt81xx-tz-smp", &mt81xx_tz_smp_ops); 147 148 static const struct smp_operations mt6589_smp_ops __initconst = { 149 .smp_prepare_cpus = mtk_smp_prepare_cpus, 150 .smp_boot_secondary = mtk_boot_secondary, 151 }; 152 CPU_METHOD_OF_DECLARE(mt6589_smp, "mediatek,mt6589-smp", &mt6589_smp_ops); 153