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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 | ||
4b245edc | 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 | { | |
989ff3fd KP |
32 | /* |
33 | * The second parameter of SMC_CMD_CPU1BOOT command means CPU id. | |
34 | * But, Exynos4212 has only one secondary CPU so second parameter | |
35 | * isn't used for informing secure firmware about CPU id. | |
36 | */ | |
37 | if (soc_is_exynos4212()) | |
38 | cpu = 0; | |
39 | ||
bca28f8f TF |
40 | exynos_smc(SMC_CMD_CPU1BOOT, cpu, 0, 0); |
41 | return 0; | |
42 | } | |
43 | ||
44 | static int exynos_set_cpu_boot_addr(int cpu, unsigned long boot_addr) | |
45 | { | |
989ff3fd KP |
46 | void __iomem *boot_reg = S5P_VA_SYSRAM_NS + 0x1c; |
47 | ||
48 | if (!soc_is_exynos4212()) | |
49 | boot_reg += 4*cpu; | |
bca28f8f TF |
50 | |
51 | __raw_writel(boot_addr, boot_reg); | |
52 | return 0; | |
53 | } | |
54 | ||
55 | static const struct firmware_ops exynos_firmware_ops = { | |
56 | .do_idle = exynos_do_idle, | |
57 | .set_cpu_boot_addr = exynos_set_cpu_boot_addr, | |
58 | .cpu_boot = exynos_cpu_boot, | |
59 | }; | |
60 | ||
61 | void __init exynos_firmware_init(void) | |
62 | { | |
4ee1cc79 TF |
63 | struct device_node *nd; |
64 | const __be32 *addr; | |
bca28f8f | 65 | |
4ee1cc79 TF |
66 | nd = of_find_compatible_node(NULL, NULL, |
67 | "samsung,secure-firmware"); | |
68 | if (!nd) | |
69 | return; | |
bca28f8f | 70 | |
4ee1cc79 TF |
71 | addr = of_get_address(nd, 0, NULL, NULL); |
72 | if (!addr) { | |
73 | pr_err("%s: No address specified.\n", __func__); | |
74 | return; | |
bca28f8f TF |
75 | } |
76 | ||
77 | pr_info("Running under secure firmware.\n"); | |
78 | ||
79 | register_firmware_ops(&exynos_firmware_ops); | |
80 | } |