GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/arch/arm/mach-exynos/tzpc.c

@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Lowlevel setup for SMDK5250 board based on S5PC520
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ */
+
+#include <common.h>
+#include <asm/arch/tzpc.h>
+#include <asm/io.h>
+
+/* Setting TZPC[TrustZone Protection Controller] */
+void tzpc_init(void)
+{
+	struct exynos_tzpc *tzpc;
+	unsigned int addr, start = 0, end = 0;
+
+	start = samsung_get_base_tzpc();
+
+	if (cpu_is_exynos5())
+		end = start + ((EXYNOS5_NR_TZPC_BANKS - 1) * TZPC_BASE_OFFSET);
+	else if (cpu_is_exynos4())
+		end = start + ((EXYNOS4_NR_TZPC_BANKS - 1) * TZPC_BASE_OFFSET);
+
+	for (addr = start; addr <= end; addr += TZPC_BASE_OFFSET) {
+		tzpc = (struct exynos_tzpc *)addr;
+
+		if (addr == start)
+			writel(R0SIZE, &tzpc->r0size);
+
+		writel(DECPROTXSET, &tzpc->decprot0set);
+		writel(DECPROTXSET, &tzpc->decprot1set);
+
+		if (cpu_is_exynos5() && (addr == end))
+			break;
+
+		writel(DECPROTXSET, &tzpc->decprot2set);
+		writel(DECPROTXSET, &tzpc->decprot3set);
+	}
+}