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-rw-r--r--target/linux/mediatek/patches/0042-ARM-mediatek-add-smp-bringup-code.patch178
1 files changed, 178 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches/0042-ARM-mediatek-add-smp-bringup-code.patch b/target/linux/mediatek/patches/0042-ARM-mediatek-add-smp-bringup-code.patch
new file mode 100644
index 0000000..8910532
--- /dev/null
+++ b/target/linux/mediatek/patches/0042-ARM-mediatek-add-smp-bringup-code.patch
@@ -0,0 +1,178 @@
+From daa2c1f9202f08628d4f91a1cf4dafb44c9bcafe Mon Sep 17 00:00:00 2001
+From: "Joe.C" <yingjoe.chen@mediatek.com>
+Date: Fri, 1 May 2015 15:43:28 +0800
+Subject: [PATCH 42/76] ARM: mediatek: add smp bringup code
+
+Add support for booting secondary CPUs on mt6589, mt8127
+and mt8135.
+
+Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
+---
+ arch/arm/mach-mediatek/Makefile | 3 +
+ arch/arm/mach-mediatek/platsmp.c | 145 ++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 148 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..e266b3d
+--- /dev/null
++++ b/arch/arm/mach-mediatek/platsmp.c
+@@ -0,0 +1,145 @@
++/*
++ * 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 boot_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, 1020, 1012,
++ { 0x534c4131, 0x4c415332, 0x41534c33 },
++ { 1016, 1016, 1016},
++};
++
++static const struct mtk_smp_boot_info mtk_mt6589_boot = {
++ 0x10002000, 0x34, 0x30,
++ { 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),
++ 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 mt65xx_smp_ops __initdata = {
++ .smp_prepare_cpus = mtk_smp_prepare_cpus,
++ .smp_boot_secondary = mtk_boot_secondary,
++};
++CPU_METHOD_OF_DECLARE(mt65xx_smp, "mediatek,mt65xx-smp", &mt65xx_smp_ops);
+--
+1.7.10.4
+