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/*
* 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 },
{},
};
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);
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