From 102b0d2daa97dae68d3eed54d8fe37a9cc38a892 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 28 Apr 2024 11:13:47 +0200
Subject: Adding upstream version 2.8.0+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 plat/arm/common/arm_bl2_el3_setup.c | 100 ++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 plat/arm/common/arm_bl2_el3_setup.c

(limited to 'plat/arm/common/arm_bl2_el3_setup.c')

diff --git a/plat/arm/common/arm_bl2_el3_setup.c b/plat/arm/common/arm_bl2_el3_setup.c
new file mode 100644
index 0000000..97b5a88
--- /dev/null
+++ b/plat/arm/common/arm_bl2_el3_setup.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include <drivers/generic_delay_timer.h>
+#include <plat/arm/common/plat_arm.h>
+#include <plat/common/platform.h>
+#include <platform_def.h>
+
+#pragma weak bl2_el3_early_platform_setup
+#pragma weak bl2_el3_plat_arch_setup
+#pragma weak bl2_el3_plat_prepare_exit
+
+#define MAP_BL2_EL3_TOTAL	MAP_REGION_FLAT(				\
+					bl2_el3_tzram_layout.total_base,	\
+					bl2_el3_tzram_layout.total_size,	\
+					MT_MEMORY | MT_RW | MT_SECURE)
+
+static meminfo_t bl2_el3_tzram_layout;
+
+/*
+ * Perform arm specific early platform setup. At this moment we only initialize
+ * the console and the memory layout.
+ */
+void arm_bl2_el3_early_platform_setup(void)
+{
+	/* Initialize the console to provide early debug support */
+	arm_console_boot_init();
+
+	/*
+	 * Allow BL2 to see the whole Trusted RAM. This is determined
+	 * statically since we cannot rely on BL1 passing this information
+	 * in the BL2_AT_EL3 case.
+	 */
+	bl2_el3_tzram_layout.total_base = ARM_BL_RAM_BASE;
+	bl2_el3_tzram_layout.total_size = ARM_BL_RAM_SIZE;
+
+	/* Initialise the IO layer and register platform IO devices */
+	plat_arm_io_setup();
+}
+
+void bl2_el3_early_platform_setup(u_register_t arg0 __unused,
+				  u_register_t arg1 __unused,
+				  u_register_t arg2 __unused,
+				  u_register_t arg3 __unused)
+{
+	arm_bl2_el3_early_platform_setup();
+
+	/*
+	 * Initialize Interconnect for this cluster during cold boot.
+	 * No need for locks as no other CPU is active.
+	 */
+	plat_arm_interconnect_init();
+	/*
+	 * Enable Interconnect coherency for the primary CPU's cluster.
+	 */
+	plat_arm_interconnect_enter_coherency();
+
+	generic_delay_timer_init();
+}
+
+/*******************************************************************************
+ * Perform the very early platform specific architectural setup here. At the
+ * moment this is only initializes the mmu in a quick and dirty way.
+ ******************************************************************************/
+void arm_bl2_el3_plat_arch_setup(void)
+{
+
+#if USE_COHERENT_MEM
+	/* Ensure ARM platforms dont use coherent memory in BL2_AT_EL3 */
+	assert(BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE == 0U);
+#endif
+
+	const mmap_region_t bl_regions[] = {
+		MAP_BL2_EL3_TOTAL,
+		ARM_MAP_BL_RO,
+		{0}
+	};
+
+	setup_page_tables(bl_regions, plat_arm_get_mmap());
+
+#ifdef __aarch64__
+	enable_mmu_el3(0);
+#else
+	enable_mmu_svc_mon(0);
+#endif
+}
+
+void bl2_el3_plat_arch_setup(void)
+{
+	arm_bl2_el3_plat_arch_setup();
+}
+
+void bl2_el3_plat_prepare_exit(void)
+{
+}
-- 
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