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

source/trusted-firmware/trusted-firmware-a-2.8/plat/arm/common/arm_bl2u_setup.c

@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <string.h>
+
+#include <platform_def.h>
+
+#include <arch_helpers.h>
+#include <common/bl_common.h>
+#include <drivers/generic_delay_timer.h>
+#include <plat/arm/common/plat_arm.h>
+#include <plat/common/platform.h>
+
+/* Weak definitions may be overridden in specific ARM standard platform */
+#pragma weak bl2u_platform_setup
+#pragma weak bl2u_early_platform_setup
+#pragma weak bl2u_plat_arch_setup
+
+#define MAP_BL2U_TOTAL		MAP_REGION_FLAT(			\
+					BL2U_BASE,			\
+					BL2U_LIMIT - BL2U_BASE,		\
+					MT_MEMORY | MT_RW | MT_SECURE)
+
+/*
+ * Perform ARM standard platform setup for BL2U
+ */
+void arm_bl2u_platform_setup(void)
+{
+	/* Initialize the secure environment */
+	plat_arm_security_setup();
+}
+
+void bl2u_platform_setup(void)
+{
+	arm_bl2u_platform_setup();
+}
+
+void arm_bl2u_early_platform_setup(struct meminfo *mem_layout, void *plat_info)
+{
+	/* Initialize the console to provide early debug support */
+	arm_console_boot_init();
+
+	generic_delay_timer_init();
+}
+
+/*******************************************************************************
+ * BL1 can pass platform dependent information to BL2U in x1.
+ * In case of ARM CSS platforms x1 contains SCP_BL2U image info.
+ * In case of ARM FVP platforms x1 is not used.
+ * In both cases, x0 contains the extents of the memory available to BL2U
+ ******************************************************************************/
+void bl2u_early_platform_setup(struct meminfo *mem_layout, void *plat_info)
+{
+	arm_bl2u_early_platform_setup(mem_layout, plat_info);
+}
+
+/*******************************************************************************
+ * Perform the very early platform specific architectural setup here. At the
+ * moment this is only initializes the mmu in a quick and dirty way.
+ * The memory that is used by BL2U is only mapped.
+ ******************************************************************************/
+void arm_bl2u_plat_arch_setup(void)
+{
+
+#if USE_COHERENT_MEM
+	/* Ensure ARM platforms dont use coherent memory in BL2U */
+	assert((BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE) == 0U);
+#endif
+
+	const mmap_region_t bl_regions[] = {
+		MAP_BL2U_TOTAL,
+		ARM_MAP_BL_RO,
+#if USE_ROMLIB
+		ARM_MAP_ROMLIB_CODE,
+		ARM_MAP_ROMLIB_DATA,
+#endif
+		{0}
+	};
+
+	setup_page_tables(bl_regions, plat_arm_get_mmap());
+
+#ifdef __aarch64__
+	enable_mmu_el1(0);
+#else
+	enable_mmu_svc_mon(0);
+#endif
+	arm_setup_romlib();
+}
+
+void bl2u_plat_arch_setup(void)
+{
+	arm_bl2u_plat_arch_setup();
+}