projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | } |