[mirror_ubuntu-artful-kernel.git] / arch / arm / mach-mediatek / platsmp.c

/*
 * 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 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) {
		/* 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(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 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);
Commit	Line	Data
0cda0700 YC	1	/*
	2	* arch/arm/mach-mediatek/platsmp.c
	3	*
	4	* Copyright (c) 2014 Mediatek Inc.
	5	* Author: Shunli Wang <shunli.wang@mediatek.com>
	6	* Yingjoe Chen <yingjoe.chen@mediatek.com>
	7	*
	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.
	11	*
	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.
	16	*
	17	*/
	18	#include <linux/io.h>
	19	#include <linux/memblock.h>
	20	#include <linux/of.h>
	21	#include <linux/of_address.h>
	22	#include <linux/string.h>
	23	#include <linux/threads.h>
	24
	25	#define MTK_MAX_CPU 8
	26	#define MTK_SMP_REG_SIZE 0x1000
	27
	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];
	33	};
	34
	35	static const struct mtk_smp_boot_info mtk_mt8135_tz_boot = {
	36	0x80002000, 0x3fc,
	37	{ 0x534c4131, 0x4c415332, 0x41534c33 },
	38	{ 0x3f8, 0x3f8, 0x3f8 },
	39	};
	40
	41	static const struct mtk_smp_boot_info mtk_mt6589_boot = {
	42	0x10002000, 0x34,
	43	{ 0x534c4131, 0x4c415332, 0x41534c33 },
	44	{ 0x38, 0x3c, 0x40 },
	45	};
	46
	47	static const struct of_device_id mtk_tz_smp_boot_infos[] __initconst = {
	48	{ .compatible = "mediatek,mt8135", .data = &mtk_mt8135_tz_boot },
	49	{ .compatible = "mediatek,mt8127", .data = &mtk_mt8135_tz_boot },
	50	};
	51
	52	static const struct of_device_id mtk_smp_boot_infos[] __initconst = {
	53	{ .compatible = "mediatek,mt6589", .data = &mtk_mt6589_boot },
	54	};
	55
	56	static void __iomem *mtk_smp_base;
	57	static const struct mtk_smp_boot_info *mtk_smp_info;
	58
	59	static int mtk_boot_secondary(unsigned int cpu, struct task_struct *idle)
	60	{
	61	if (!mtk_smp_base)
	62	return -EINVAL;
	63
	64	if (!mtk_smp_info->core_keys[cpu-1])
65	return -EINVAL;
66
67	writel_relaxed(mtk_smp_info->core_keys[cpu-1],
68	mtk_smp_base + mtk_smp_info->core_regs[cpu-1]);
69
70	arch_send_wakeup_ipi_mask(cpumask_of(cpu));
71
72	return 0;
73	}
74
75	static void __init __mtk_smp_prepare_cpus(unsigned int max_cpus, int trustzone)
76	{
77	int i, num;
78	const struct of_device_id *infos;
79
80	if (trustzone) {
81	num = ARRAY_SIZE(mtk_tz_smp_boot_infos);
82	infos = mtk_tz_smp_boot_infos;
83	} else {
84	num = ARRAY_SIZE(mtk_smp_boot_infos);
85	infos = mtk_smp_boot_infos;
86	}
87
88	/* Find smp boot info for this SoC */
89	for (i = 0; i < num; i++) {
90	if (of_machine_is_compatible(infos[i].compatible)) {
91	mtk_smp_info = infos[i].data;
92	break;
93	}
94	}
95
96	if (!mtk_smp_info) {
97	pr_err("%s: Device is not supported\n", __func__);
98	return;
99	}
100
101	if (trustzone) {
102	/* smp_base(trustzone-bootinfo) is reserved by device tree */
103	mtk_smp_base = phys_to_virt(mtk_smp_info->smp_base);
104	} else {
105	mtk_smp_base = ioremap(mtk_smp_info->smp_base, MTK_SMP_REG_SIZE);
106	if (!mtk_smp_base) {
107	pr_err("%s: Can't remap %lx\n", __func__,
108	mtk_smp_info->smp_base);
109	return;
110	}
111	}
112
113	/*
114	* write the address of slave startup address into the system-wide
115	* jump register
116	*/
117	writel_relaxed(virt_to_phys(secondary_startup_arm),
118	mtk_smp_base + mtk_smp_info->jump_reg);
119	}
120
121	static void __init mtk_tz_smp_prepare_cpus(unsigned int max_cpus)
122	{
123	__mtk_smp_prepare_cpus(max_cpus, 1);
124	}
125
126	static void __init mtk_smp_prepare_cpus(unsigned int max_cpus)
127	{
128	__mtk_smp_prepare_cpus(max_cpus, 0);
129	}
130
75305275	131	static const struct smp_operations mt81xx_tz_smp_ops __initconst = {
0cda0700 YC	132	.smp_prepare_cpus = mtk_tz_smp_prepare_cpus,
	133	.smp_boot_secondary = mtk_boot_secondary,
	134	};
	135	CPU_METHOD_OF_DECLARE(mt81xx_tz_smp, "mediatek,mt81xx-tz-smp", &mt81xx_tz_smp_ops);
	136
75305275	137	static const struct smp_operations mt6589_smp_ops __initconst = {
0cda0700 YC	138	.smp_prepare_cpus = mtk_smp_prepare_cpus,
	139	.smp_boot_secondary = mtk_boot_secondary,
	140	};
	141	CPU_METHOD_OF_DECLARE(mt6589_smp, "mediatek,mt6589-smp", &mt6589_smp_ops);