summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-mediatek/platsmp.c
blob: a1b07eeaaf5b6a42bceac6c3dd62425002c9c95d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
/*
 * 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);
OpenPOWER on IntegriCloud