1 files changed, 97 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c
new file mode 100644
index 00000000000..e8797bb7887
--- /dev/null
+++ b/arch/arm/mach-exynos/firmware.c
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics.
+ * Kyungmin Park <kyungmin.park@samsung.com>
+ * Tomasz Figa <t.figa@samsung.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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include <asm/firmware.h>
+
+#include <mach/map.h>
+
+#include "common.h"
+#include "smc.h"
+
+static int exynos_do_idle(void)
+{
+	exynos_smc(SMC_CMD_SLEEP, 0, 0, 0);
+	return 0;
+}
+
+static int exynos_cpu_boot(int cpu)
+{
+	/*
+	 * Exynos3250 doesn't need to send smc command for secondary CPU boot
+	 * because Exynos3250 removes WFE in secure mode.
+	 */
+	if (soc_is_exynos3250())
+		return 0;
+
+	/*
+	 * The second parameter of SMC_CMD_CPU1BOOT command means CPU id.
+	 * But, Exynos4212 has only one secondary CPU so second parameter
+	 * isn't used for informing secure firmware about CPU id.
+	 */
+	if (soc_is_exynos4212())
+		cpu = 0;
+
+	exynos_smc(SMC_CMD_CPU1BOOT, cpu, 0, 0);
+	return 0;
+}
+
+static int exynos_set_cpu_boot_addr(int cpu, unsigned long boot_addr)
+{
+	void __iomem *boot_reg;
+
+	if (!sysram_ns_base_addr)
+		return -ENODEV;
+
+	boot_reg = sysram_ns_base_addr + 0x1c;
+
+	/*
+	 * Almost all Exynos-series of SoCs that run in secure mode don't need
+	 * additional offset for every CPU, with Exynos4412 being the only
+	 * exception.
+	 */
+	if (soc_is_exynos4412())
+		boot_reg += 4 * cpu;
+
+	__raw_writel(boot_addr, boot_reg);
+	return 0;
+}
+
+static const struct firmware_ops exynos_firmware_ops = {
+	.do_idle		= exynos_do_idle,
+	.set_cpu_boot_addr	= exynos_set_cpu_boot_addr,
+	.cpu_boot		= exynos_cpu_boot,
+};
+
+void __init exynos_firmware_init(void)
+{
+	struct device_node *nd;
+	const __be32 *addr;
+
+	nd = of_find_compatible_node(NULL, NULL,
+					"samsung,secure-firmware");
+	if (!nd)
+		return;
+
+	addr = of_get_address(nd, 0, NULL, NULL);
+	if (!addr) {
+		pr_err("%s: No address specified.\n", __func__);
+		return;
+	}
+
+	pr_info("Running under secure firmware.\n");
+
+	register_firmware_ops(&exynos_firmware_ops);
+}