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 mtk_smp_boot_info mtk_mt7623_boot = {
49 { 0x534c4131, 0x4c415332, 0x41534c33 },
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 },
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 },
64 static void __iomem *mtk_smp_base;
65 static const struct mtk_smp_boot_info *mtk_smp_info;
67 static int mtk_boot_secondary(unsigned int cpu, struct task_struct *idle)
72 if (!mtk_smp_info->core_keys[cpu-1])
75 writel_relaxed(mtk_smp_info->core_keys[cpu-1],
76 mtk_smp_base + mtk_smp_info->core_regs[cpu-1]);
78 arch_send_wakeup_ipi_mask(cpumask_of(cpu));
83 static void __init __mtk_smp_prepare_cpus(unsigned int max_cpus, int trustzone)
86 const struct of_device_id *infos;
89 num = ARRAY_SIZE(mtk_tz_smp_boot_infos);
90 infos = mtk_tz_smp_boot_infos;
92 num = ARRAY_SIZE(mtk_smp_boot_infos);
93 infos = mtk_smp_boot_infos;
96 /* Find smp boot info for this SoC */
97 for (i = 0; i < num; i++) {
98 if (of_machine_is_compatible(infos[i].compatible)) {
99 mtk_smp_info = infos[i].data;
105 pr_err("%s: Device is not supported\n", __func__);
110 /* smp_base(trustzone-bootinfo) is reserved by device tree */
111 mtk_smp_base = phys_to_virt(mtk_smp_info->smp_base);
113 mtk_smp_base = ioremap(mtk_smp_info->smp_base, MTK_SMP_REG_SIZE);
115 pr_err("%s: Can't remap %lx\n", __func__,
116 mtk_smp_info->smp_base);
122 * write the address of slave startup address into the system-wide
125 writel_relaxed(virt_to_phys(secondary_startup_arm),
126 mtk_smp_base + mtk_smp_info->jump_reg);
129 static void __init mtk_tz_smp_prepare_cpus(unsigned int max_cpus)
131 __mtk_smp_prepare_cpus(max_cpus, 1);
134 static void __init mtk_smp_prepare_cpus(unsigned int max_cpus)
136 __mtk_smp_prepare_cpus(max_cpus, 0);
139 static const struct smp_operations mt81xx_tz_smp_ops __initconst = {
140 .smp_prepare_cpus = mtk_tz_smp_prepare_cpus,
141 .smp_boot_secondary = mtk_boot_secondary,
143 CPU_METHOD_OF_DECLARE(mt81xx_tz_smp, "mediatek,mt81xx-tz-smp", &mt81xx_tz_smp_ops);
145 static const struct smp_operations mt6589_smp_ops __initconst = {
146 .smp_prepare_cpus = mtk_smp_prepare_cpus,
147 .smp_boot_secondary = mtk_boot_secondary,
149 CPU_METHOD_OF_DECLARE(mt6589_smp, "mediatek,mt6589-smp", &mt6589_smp_ops);