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 static const struct of_device_id mtk_smp_boot_infos[] __initconst = { 60 { .compatible = "mediatek,mt6589", .data = &mtk_mt6589_boot }, 61 { .compatible = "mediatek,mt7623", .data = &mtk_mt7623_boot }, 62 { .compatible = "mediatek,mt7623a", .data = &mtk_mt7623_boot }, 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