2 * arch/arm/mach-mediatek/platsmp.c
4 * Copyright (c) 2014 Mediatek Inc.
5 * Author: Shunli Wang <shunli.wang@mediatek.com>
6 * Yingjoe Chen <yingjoe.chen@mediatek.com>
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.
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.
19 #include <linux/memblock.h>
21 #include <linux/of_address.h>
22 #include <linux/string.h>
23 #include <linux/threads.h>
26 #define MTK_SMP_REG_SIZE 0x1000
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];
35 static const struct mtk_smp_boot_info mtk_mt8135_tz_boot = {
37 { 0x534c4131, 0x4c415332, 0x41534c33 },
38 { 0x3f8, 0x3f8, 0x3f8 },
41 static const struct mtk_smp_boot_info mtk_mt6589_boot = {
43 { 0x534c4131, 0x4c415332, 0x41534c33 },
47 static const struct of_device_id mtk_tz_smp_boot_infos[] __initconst = {
48 { .compatible = "mediatek,mt8135", .data = &mtk_mt8135_tz_boot },
49 { .compatible = "mediatek,mt8127", .data = &mtk_mt8135_tz_boot },
52 static const struct of_device_id mtk_smp_boot_infos[] __initconst = {
53 { .compatible = "mediatek,mt6589", .data = &mtk_mt6589_boot },
56 static void __iomem *mtk_smp_base;
57 static const struct mtk_smp_boot_info *mtk_smp_info;
59 static int mtk_boot_secondary(unsigned int cpu, struct task_struct *idle)
64 if (!mtk_smp_info->core_keys[cpu-1])
67 writel_relaxed(mtk_smp_info->core_keys[cpu-1],
68 mtk_smp_base + mtk_smp_info->core_regs[cpu-1]);
70 arch_send_wakeup_ipi_mask(cpumask_of(cpu));
75 static void __init __mtk_smp_prepare_cpus(unsigned int max_cpus, int trustzone)
78 const struct of_device_id *infos;
81 num = ARRAY_SIZE(mtk_tz_smp_boot_infos);
82 infos = mtk_tz_smp_boot_infos;
84 num = ARRAY_SIZE(mtk_smp_boot_infos);
85 infos = mtk_smp_boot_infos;
88 /* Find smp boot info for this SoC */
89 for (i = 0; i < num; i++) {
90 if (of_machine_is_compatible(infos[i].compatible)) {
91 mtk_smp_info = infos[i].data;
97 pr_err("%s: Device is not supported\n", __func__);
102 /* smp_base(trustzone-bootinfo) is reserved by device tree */
103 mtk_smp_base = phys_to_virt(mtk_smp_info->smp_base);
105 mtk_smp_base = ioremap(mtk_smp_info->smp_base, MTK_SMP_REG_SIZE);
107 pr_err("%s: Can't remap %lx\n", __func__,
108 mtk_smp_info->smp_base);
114 * write the address of slave startup address into the system-wide
117 writel_relaxed(virt_to_phys(secondary_startup_arm),
118 mtk_smp_base + mtk_smp_info->jump_reg);
121 static void __init mtk_tz_smp_prepare_cpus(unsigned int max_cpus)
123 __mtk_smp_prepare_cpus(max_cpus, 1);
126 static void __init mtk_smp_prepare_cpus(unsigned int max_cpus)
128 __mtk_smp_prepare_cpus(max_cpus, 0);
131 static struct smp_operations mt81xx_tz_smp_ops __initdata = {
132 .smp_prepare_cpus = mtk_tz_smp_prepare_cpus,
133 .smp_boot_secondary = mtk_boot_secondary,
135 CPU_METHOD_OF_DECLARE(mt81xx_tz_smp, "mediatek,mt81xx-tz-smp", &mt81xx_tz_smp_ops);
137 static struct smp_operations mt6589_smp_ops __initdata = {
138 .smp_prepare_cpus = mtk_smp_prepare_cpus,
139 .smp_boot_secondary = mtk_boot_secondary,
141 CPU_METHOD_OF_DECLARE(mt6589_smp, "mediatek,mt6589-smp", &mt6589_smp_ops);