Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752409AbbGNFTf (ORCPT ); Tue, 14 Jul 2015 01:19:35 -0400 Received: from mailgw01.mediatek.com ([210.61.82.183]:59512 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752292AbbGNFTc (ORCPT ); Tue, 14 Jul 2015 01:19:32 -0400 X-Listener-Flag: 11101 From: Yingjoe Chen To: Matthias Brugger CC: Russell King , , Arnd Bergmann , Stephen Boyd , , Rob Herring , , Sascha Hauer , Olof Johansson , Yingjoe Chen , , Subject: [PATCH v3 3/5] ARM: mediatek: add smp bringup code Date: Tue, 14 Jul 2015 13:18:29 +0800 Message-ID: <1436851111-2369-4-git-send-email-yingjoe.chen@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1436851111-2369-1-git-send-email-yingjoe.chen@mediatek.com> References: <1436851111-2369-1-git-send-email-yingjoe.chen@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5183 Lines: 177 Add support for booting secondary CPUs on mt6589, mt8127 and mt8135. Signed-off-by: Yingjoe Chen --- arch/arm/mach-mediatek/Makefile | 3 + arch/arm/mach-mediatek/platsmp.c | 144 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 147 insertions(+) create mode 100644 arch/arm/mach-mediatek/platsmp.c diff --git a/arch/arm/mach-mediatek/Makefile b/arch/arm/mach-mediatek/Makefile index 43e619f..2116460 100644 --- a/arch/arm/mach-mediatek/Makefile +++ b/arch/arm/mach-mediatek/Makefile @@ -1 +1,4 @@ +ifeq ($(CONFIG_SMP),y) +obj-$(CONFIG_ARCH_MEDIATEK) += platsmp.o +endif obj-$(CONFIG_ARCH_MEDIATEK) += mediatek.o diff --git a/arch/arm/mach-mediatek/platsmp.c b/arch/arm/mach-mediatek/platsmp.c new file mode 100644 index 0000000..a5bc108 --- /dev/null +++ b/arch/arm/mach-mediatek/platsmp.c @@ -0,0 +1,144 @@ +/* + * arch/arm/mach-mediatek/platsmp.c + * + * Copyright (c) 2014 Mediatek Inc. + * Author: Shunli Wang + * Yingjoe Chen + * + * 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 +#include +#include +#include +#include +#include + +#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 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 }, +}; + +static const struct of_device_id mtk_smp_boot_infos[] __initconst = { + { .compatible = "mediatek,mt6589", .data = &mtk_mt6589_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) { + if (memblock_reserve(mtk_smp_info->smp_base, MTK_SMP_REG_SIZE)) { + pr_err("%s: Can't reserve smp memory\n", __func__); + return; + } + 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(virt_to_phys(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 struct smp_operations mt81xx_tz_smp_ops __initdata = { + .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 struct smp_operations mt6589_smp_ops __initdata = { + .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); -- 1.8.1.1.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/