projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 0cda0700 YC |
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 | ||
| fd63892f JC |
47 | static const struct mtk_smp_boot_info mtk_mt7623_boot = { |
| 48 | 0x10202000, 0x34, | |
| 49 | { 0x534c4131, 0x4c415332, 0x41534c33 }, | |
| 50 | { 0x38, 0x3c, 0x40 }, | |
| 51 | }; | |
| 52 | ||
| 0cda0700 YC |
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 }, | |
| 5b0fb1ea | 56 | { .compatible = "mediatek,mt2701", .data = &mtk_mt8135_tz_boot }, |
| 0cda0700 YC |
57 | }; |
| 58 | ||
| 59 | static const struct of_device_id mtk_smp_boot_infos[] __initconst = { | |
| 60 | { .compatible = "mediatek,mt6589", .data = &mtk_mt6589_boot }, | |
| fd63892f | 61 | { .compatible = "mediatek,mt7623", .data = &mtk_mt7623_boot }, |
| 3b99ab7d | 62 | { .compatible = "mediatek,mt7623a", .data = &mtk_mt7623_boot }, |
| 0cda0700 YC |
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 | */ | |
| 64fc2a94 | 126 | writel_relaxed(__pa_symbol(secondary_startup_arm), |
| 0cda0700 YC |
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 | ||
| 75305275 | 140 | static const struct smp_operations mt81xx_tz_smp_ops __initconst = { |
| 0cda0700 YC |
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 | ||
| 75305275 | 146 | static const struct smp_operations mt6589_smp_ops __initconst = { |
| 0cda0700 YC |
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); |