Commit | Line | Data |
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bca28f8f TF |
1 | /* |
2 | * Copyright (C) 2012 Samsung Electronics. | |
3 | * Kyungmin Park <kyungmin.park@samsung.com> | |
4 | * Tomasz Figa <t.figa@samsung.com> | |
5 | * | |
6 | * This program is free software,you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/kernel.h> | |
12 | #include <linux/io.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/of.h> | |
15 | #include <linux/of_address.h> | |
16 | ||
17 | #include <asm/firmware.h> | |
18 | ||
19 | #include <mach/map.h> | |
20 | ||
b3205dea | 21 | #include "common.h" |
bca28f8f TF |
22 | #include "smc.h" |
23 | ||
24 | static int exynos_do_idle(void) | |
25 | { | |
26 | exynos_smc(SMC_CMD_SLEEP, 0, 0, 0); | |
27 | return 0; | |
28 | } | |
29 | ||
30 | static int exynos_cpu_boot(int cpu) | |
31 | { | |
6457158a CC |
32 | /* |
33 | * Exynos3250 doesn't need to send smc command for secondary CPU boot | |
34 | * because Exynos3250 removes WFE in secure mode. | |
35 | */ | |
36 | if (soc_is_exynos3250()) | |
37 | return 0; | |
38 | ||
989ff3fd KP |
39 | /* |
40 | * The second parameter of SMC_CMD_CPU1BOOT command means CPU id. | |
41 | * But, Exynos4212 has only one secondary CPU so second parameter | |
42 | * isn't used for informing secure firmware about CPU id. | |
43 | */ | |
44 | if (soc_is_exynos4212()) | |
45 | cpu = 0; | |
46 | ||
bca28f8f TF |
47 | exynos_smc(SMC_CMD_CPU1BOOT, cpu, 0, 0); |
48 | return 0; | |
49 | } | |
50 | ||
51 | static int exynos_set_cpu_boot_addr(int cpu, unsigned long boot_addr) | |
52 | { | |
b3205dea SK |
53 | void __iomem *boot_reg; |
54 | ||
55 | if (!sysram_ns_base_addr) | |
56 | return -ENODEV; | |
57 | ||
fe388fac | 58 | boot_reg = sysram_ns_base_addr + 0x1c; |
989ff3fd | 59 | |
35e75645 SK |
60 | /* |
61 | * Almost all Exynos-series of SoCs that run in secure mode don't need | |
62 | * additional offset for every CPU, with Exynos4412 being the only | |
63 | * exception. | |
64 | */ | |
65 | if (soc_is_exynos4412()) | |
66 | boot_reg += 4 * cpu; | |
bca28f8f TF |
67 | |
68 | __raw_writel(boot_addr, boot_reg); | |
69 | return 0; | |
70 | } | |
71 | ||
72 | static const struct firmware_ops exynos_firmware_ops = { | |
73 | .do_idle = exynos_do_idle, | |
74 | .set_cpu_boot_addr = exynos_set_cpu_boot_addr, | |
75 | .cpu_boot = exynos_cpu_boot, | |
76 | }; | |
77 | ||
78 | void __init exynos_firmware_init(void) | |
79 | { | |
4ee1cc79 TF |
80 | struct device_node *nd; |
81 | const __be32 *addr; | |
bca28f8f | 82 | |
4ee1cc79 TF |
83 | nd = of_find_compatible_node(NULL, NULL, |
84 | "samsung,secure-firmware"); | |
85 | if (!nd) | |
86 | return; | |
bca28f8f | 87 | |
4ee1cc79 TF |
88 | addr = of_get_address(nd, 0, NULL, NULL); |
89 | if (!addr) { | |
90 | pr_err("%s: No address specified.\n", __func__); | |
91 | return; | |
bca28f8f TF |
92 | } |
93 | ||
94 | pr_info("Running under secure firmware.\n"); | |
95 | ||
96 | register_firmware_ops(&exynos_firmware_ops); | |
97 | } |