2 * Copyright (C) 2012 Samsung Electronics.
3 * Kyungmin Park <kyungmin.park@samsung.com>
4 * Tomasz Figa <t.figa@samsung.com>
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.
11 #include <linux/kernel.h>
13 #include <linux/init.h>
15 #include <linux/of_address.h>
17 #include <asm/firmware.h>
24 static int exynos_do_idle(void)
26 exynos_smc(SMC_CMD_SLEEP
, 0, 0, 0);
30 static int exynos_cpu_boot(int cpu
)
33 * Exynos3250 doesn't need to send smc command for secondary CPU boot
34 * because Exynos3250 removes WFE in secure mode.
36 if (soc_is_exynos3250())
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.
44 if (soc_is_exynos4212())
47 exynos_smc(SMC_CMD_CPU1BOOT
, cpu
, 0, 0);
51 static int exynos_set_cpu_boot_addr(int cpu
, unsigned long boot_addr
)
53 void __iomem
*boot_reg
;
55 if (!sysram_ns_base_addr
)
58 boot_reg
= sysram_ns_base_addr
+ 0x1c;
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
65 if (soc_is_exynos4412())
68 __raw_writel(boot_addr
, boot_reg
);
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
,
78 void __init
exynos_firmware_init(void)
80 struct device_node
*nd
;
83 nd
= of_find_compatible_node(NULL
, NULL
,
84 "samsung,secure-firmware");
88 addr
= of_get_address(nd
, 0, NULL
, NULL
);
90 pr_err("%s: No address specified.\n", __func__
);
94 pr_info("Running under secure firmware.\n");
96 register_firmware_ops(&exynos_firmware_ops
);