| /* |
| * arch/arm/mach-mediatek/platsmp.c |
| * |
| * Copyright (c) 2014 Mediatek Inc. |
| * Author: Shunli Wang <shunli.wang@mediatek.com> |
| * Yingjoe Chen <yingjoe.chen@mediatek.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| */ |
| #include <linux/io.h> |
| #include <linux/memblock.h> |
| #include <linux/of.h> |
| #include <linux/of_address.h> |
| #include <linux/string.h> |
| #include <linux/threads.h> |
| |
| #define MTK_MAX_CPU 8 |
| #define MTK_SMP_REG_SIZE 0x1000 |
| |
| struct mtk_smp_boot_info { |
| unsigned long smp_base; |
| unsigned int jump_reg; |
| unsigned int core_keys[MTK_MAX_CPU - 1]; |
| unsigned int core_regs[MTK_MAX_CPU - 1]; |
| }; |
| |
| static const struct mtk_smp_boot_info mtk_mt8135_tz_boot = { |
| 0x80002000, 0x3fc, |
| { 0x534c4131, 0x4c415332, 0x41534c33 }, |
| { 0x3f8, 0x3f8, 0x3f8 }, |
| }; |
| |
| static const struct mtk_smp_boot_info mtk_mt6589_boot = { |
| 0x10002000, 0x34, |
| { 0x534c4131, 0x4c415332, 0x41534c33 }, |
| { 0x38, 0x3c, 0x40 }, |
| }; |
| |
| static const struct mtk_smp_boot_info mtk_mt7623_boot = { |
| 0x10202000, 0x34, |
| { 0x534c4131, 0x4c415332, 0x41534c33 }, |
| { 0x38, 0x3c, 0x40 }, |
| }; |
| |
| static const struct of_device_id mtk_tz_smp_boot_infos[] __initconst = { |
| { .compatible = "mediatek,mt8135", .data = &mtk_mt8135_tz_boot }, |
| { .compatible = "mediatek,mt8127", .data = &mtk_mt8135_tz_boot }, |
| { .compatible = "mediatek,mt2701", .data = &mtk_mt8135_tz_boot }, |
| {}, |
| }; |
| |
| static const struct of_device_id mtk_smp_boot_infos[] __initconst = { |
| { .compatible = "mediatek,mt6589", .data = &mtk_mt6589_boot }, |
| { .compatible = "mediatek,mt7623", .data = &mtk_mt7623_boot }, |
| { .compatible = "mediatek,mt7629", .data = &mtk_mt7623_boot }, |
| {}, |
| }; |
| |
| static void __iomem *mtk_smp_base; |
| static const struct mtk_smp_boot_info *mtk_smp_info; |
| |
| static int mtk_boot_secondary(unsigned int cpu, struct task_struct *idle) |
| { |
| if (!mtk_smp_base) |
| return -EINVAL; |
| |
| if (!mtk_smp_info->core_keys[cpu-1]) |
| return -EINVAL; |
| |
| writel_relaxed(mtk_smp_info->core_keys[cpu-1], |
| mtk_smp_base + mtk_smp_info->core_regs[cpu-1]); |
| |
| arch_send_wakeup_ipi_mask(cpumask_of(cpu)); |
| |
| return 0; |
| } |
| |
| static void __init __mtk_smp_prepare_cpus(unsigned int max_cpus, int trustzone) |
| { |
| int i, num; |
| const struct of_device_id *infos; |
| |
| if (trustzone) { |
| num = ARRAY_SIZE(mtk_tz_smp_boot_infos); |
| infos = mtk_tz_smp_boot_infos; |
| } else { |
| num = ARRAY_SIZE(mtk_smp_boot_infos); |
| infos = mtk_smp_boot_infos; |
| } |
| |
| /* Find smp boot info for this SoC */ |
| for (i = 0; i < num; i++) { |
| if (of_machine_is_compatible(infos[i].compatible)) { |
| mtk_smp_info = infos[i].data; |
| break; |
| } |
| } |
| |
| if (!mtk_smp_info) { |
| pr_err("%s: Device is not supported\n", __func__); |
| return; |
| } |
| |
| if (trustzone) { |
| /* smp_base(trustzone-bootinfo) is reserved by device tree */ |
| mtk_smp_base = phys_to_virt(mtk_smp_info->smp_base); |
| } else { |
| mtk_smp_base = ioremap(mtk_smp_info->smp_base, MTK_SMP_REG_SIZE); |
| if (!mtk_smp_base) { |
| pr_err("%s: Can't remap %lx\n", __func__, |
| mtk_smp_info->smp_base); |
| return; |
| } |
| } |
| |
| /* |
| * write the address of slave startup address into the system-wide |
| * jump register |
| */ |
| writel_relaxed(__pa_symbol(secondary_startup_arm), |
| mtk_smp_base + mtk_smp_info->jump_reg); |
| } |
| |
| static void __init mtk_tz_smp_prepare_cpus(unsigned int max_cpus) |
| { |
| __mtk_smp_prepare_cpus(max_cpus, 1); |
| } |
| |
| static void __init mtk_smp_prepare_cpus(unsigned int max_cpus) |
| { |
| __mtk_smp_prepare_cpus(max_cpus, 0); |
| } |
| |
| static const struct smp_operations mt81xx_tz_smp_ops __initconst = { |
| .smp_prepare_cpus = mtk_tz_smp_prepare_cpus, |
| .smp_boot_secondary = mtk_boot_secondary, |
| }; |
| CPU_METHOD_OF_DECLARE(mt81xx_tz_smp, "mediatek,mt81xx-tz-smp", &mt81xx_tz_smp_ops); |
| |
| static const struct smp_operations mt6589_smp_ops __initconst = { |
| .smp_prepare_cpus = mtk_smp_prepare_cpus, |
| .smp_boot_secondary = mtk_boot_secondary, |
| }; |
| CPU_METHOD_OF_DECLARE(mt6589_smp, "mediatek,mt6589-smp", &mt6589_smp_ops); |