1 files changed, 268 insertions, 0 deletions
diff --git a/plat/arm/board/fvp_r/fvp_r_bl1_main.c b/plat/arm/board/fvp_r/fvp_r_bl1_main.c
new file mode 100644
index 0000000..841a176
--- /dev/null
+++ b/plat/arm/board/fvp_r/fvp_r_bl1_main.c
@@ -0,0 +1,268 @@
+/*
+ * Copyright (c) 2021, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include "../../../../bl1/bl1_private.h"
+#include <arch.h>
+#include <arch_features.h>
+#include <arch_helpers.h>
+#include <bl1/bl1.h>
+#include <common/bl_common.h>
+#include <common/debug.h>
+#include <drivers/auth/auth_mod.h>
+#include <drivers/console.h>
+#include <lib/cpus/errata_report.h>
+#include <lib/utils.h>
+#include <smccc_helpers.h>
+#include <tools_share/uuid.h>
+#include <plat/arm/common/plat_arm.h>
+#include <plat/common/platform.h>
+
+#include <platform_def.h>
+
+
+void cm_prepare_el2_exit(void);
+
+void bl1_run_next_image(const struct entry_point_info *bl_ep_info);
+
+/*******************************************************************************
+ * Function to perform late architectural and platform specific initialization.
+ * It also queries the platform to load and run next BL image. Only called
+ * by the primary cpu after a cold boot.
+ ******************************************************************************/
+void bl1_transfer_bl33(void)
+{
+	unsigned int image_id;
+
+	/* Get the image id of next image to load and run. */
+	image_id = bl1_plat_get_next_image_id();
+
+#if !ARM_DISABLE_TRUSTED_WDOG
+	/* Disable watchdog before leaving BL1 */
+	plat_arm_secure_wdt_stop();
+#endif
+
+	bl1_run_next_image(&bl1_plat_get_image_desc(image_id)->ep_info);
+}
+
+/*******************************************************************************
+ * This function locates and loads the BL33 raw binary image in the trusted SRAM.
+ * Called by the primary cpu after a cold boot.
+ * TODO: Add support for alternative image load mechanism e.g using virtio/elf
+ * loader etc.
+ ******************************************************************************/
+void bl1_load_bl33(void)
+{
+	image_desc_t *desc;
+	image_info_t *info;
+	int err;
+
+	/* Get the image descriptor */
+	desc = bl1_plat_get_image_desc(BL33_IMAGE_ID);
+	assert(desc != NULL);
+
+	/* Get the image info */
+	info = &desc->image_info;
+	INFO("BL1: Loading BL33\n");
+
+	err = bl1_plat_handle_pre_image_load(BL33_IMAGE_ID);
+	if (err != 0) {
+		ERROR("Failure in pre image load handling of BL33 (%d)\n", err);
+		plat_error_handler(err);
+	}
+
+	err = load_auth_image(BL33_IMAGE_ID, info);
+	if (err != 0) {
+		ERROR("Failed to load BL33 firmware.\n");
+		plat_error_handler(err);
+	}
+
+	/* Allow platform to handle image information. */
+	err = bl1_plat_handle_post_image_load(BL33_IMAGE_ID);
+	if (err != 0) {
+		ERROR("Failure in post image load handling of BL33 (%d)\n", err);
+		plat_error_handler(err);
+	}
+
+	NOTICE("BL1: Booting BL33\n");
+}
+
+/*******************************************************************************
+ * Helper utility to calculate the BL2 memory layout taking into consideration
+ * the BL1 RW data assuming that it is at the top of the memory layout.
+ ******************************************************************************/
+void bl1_calc_bl2_mem_layout(const meminfo_t *bl1_mem_layout,
+			meminfo_t *bl2_mem_layout)
+{
+	assert(bl1_mem_layout != NULL);
+	assert(bl2_mem_layout != NULL);
+
+	/*
+	 * Remove BL1 RW data from the scope of memory visible to BL2.
+	 * This is assuming BL1 RW data is at the top of bl1_mem_layout.
+	 */
+	assert(bl1_mem_layout->total_base < BL1_RW_BASE);
+	bl2_mem_layout->total_base = bl1_mem_layout->total_base;
+	bl2_mem_layout->total_size = BL1_RW_BASE - bl1_mem_layout->total_base;
+
+	flush_dcache_range((uintptr_t)bl2_mem_layout, sizeof(meminfo_t));
+}
+
+/*******************************************************************************
+ * This function prepares for entry to BL33
+ ******************************************************************************/
+void bl1_prepare_next_image(unsigned int image_id)
+{
+	unsigned int mode = MODE_EL1;
+	image_desc_t *desc;
+	entry_point_info_t *next_bl_ep;
+
+#if CTX_INCLUDE_AARCH32_REGS
+	/*
+	 * Ensure that the build flag to save AArch32 system registers in CPU
+	 * context is not set for AArch64-only platforms.
+	 */
+	if (el_implemented(1) == EL_IMPL_A64ONLY) {
+		ERROR("EL1 supports AArch64-only. Please set build flag %s",
+				"CTX_INCLUDE_AARCH32_REGS = 0\n");
+		panic();
+	}
+#endif
+
+	/* Get the image descriptor. */
+	desc = bl1_plat_get_image_desc(image_id);
+	assert(desc != NULL);
+
+	/* Get the entry point info. */
+	next_bl_ep = &desc->ep_info;
+
+	/* FVP-R is only secure */
+	assert(GET_SECURITY_STATE(next_bl_ep->h.attr) == SECURE);
+
+	/* Prepare the SPSR for the next BL image. */
+	next_bl_ep->spsr = (uint32_t)SPSR_64((uint64_t) mode,
+		(uint64_t)MODE_SP_ELX, DISABLE_ALL_EXCEPTIONS);
+
+	/* Allow platform to make change */
+	bl1_plat_set_ep_info(image_id, next_bl_ep);
+
+	/* Prepare context for the next EL */
+	cm_prepare_el2_exit();
+
+	/* Indicate that image is in execution state. */
+	desc->state = IMAGE_STATE_EXECUTED;
+
+	print_entry_point_info(next_bl_ep);
+}
+
+/*******************************************************************************
+ * Setup function for BL1.
+ ******************************************************************************/
+void bl1_setup(void)
+{
+	/* Perform early platform-specific setup */
+	bl1_early_platform_setup();
+
+	/* Perform late platform-specific setup */
+	bl1_plat_arch_setup();
+}
+
+/*******************************************************************************
+ * Function to perform late architectural and platform specific initialization.
+ * It also queries the platform to load and run next BL image. Only called
+ * by the primary cpu after a cold boot.
+ ******************************************************************************/
+void bl1_main(void)
+{
+	unsigned int image_id;
+
+	/* Announce our arrival */
+	NOTICE(FIRMWARE_WELCOME_STR);
+	NOTICE("BL1: %s\n", version_string);
+	NOTICE("BL1: %s\n", build_message);
+
+	INFO("BL1: RAM %p - %p\n", (void *)BL1_RAM_BASE, (void *)BL1_RAM_LIMIT);
+
+	print_errata_status();
+
+#if ENABLE_ASSERTIONS
+	u_register_t val;
+	/*
+	 * Ensure that MMU/Caches and coherency are turned on
+	 */
+	val = read_sctlr_el2();
+
+	assert((val & SCTLR_M_BIT) != 0U);
+	assert((val & SCTLR_C_BIT) != 0U);
+	assert((val & SCTLR_I_BIT) != 0U);
+	/*
+	 * Check that Cache Writeback Granule (CWG) in CTR_EL0 matches the
+	 * provided platform value
+	 */
+	val = (read_ctr_el0() >> CTR_CWG_SHIFT) & CTR_CWG_MASK;
+	/*
+	 * If CWG is zero, then no CWG information is available but we can
+	 * at least check the platform value is less than the architectural
+	 * maximum.
+	 */
+	if (val != 0) {
+		assert(SIZE_FROM_LOG2_WORDS(val) == CACHE_WRITEBACK_GRANULE);
+	} else {
+		assert(MAX_CACHE_LINE_SIZE >= CACHE_WRITEBACK_GRANULE);
+	}
+#endif /* ENABLE_ASSERTIONS */
+
+	/* Perform remaining generic architectural setup from ELmax */
+	bl1_arch_setup();
+
+#if TRUSTED_BOARD_BOOT
+	/* Initialize authentication module */
+	auth_mod_init();
+#endif /* TRUSTED_BOARD_BOOT */
+
+	/* Perform platform setup in BL1. */
+	bl1_platform_setup();
+
+	/* Get the image id of next image to load and run. */
+	image_id = bl1_plat_get_next_image_id();
+
+	/*
+	 * We currently interpret any image id other than
+	 * BL2_IMAGE_ID as the start of firmware update.
+	 */
+	if (image_id == BL33_IMAGE_ID) {
+		bl1_load_bl33();
+	} else {
+		NOTICE("BL1-FWU: *******FWU Process Started*******\n");
+	}
+
+	bl1_prepare_next_image(image_id);
+
+	console_flush();
+
+	bl1_transfer_bl33();
+}
+
+/*******************************************************************************
+ * Function called just before handing over to the next BL to inform the user
+ * about the boot progress. In debug mode, also print details about the BL
+ * image's execution context.
+ ******************************************************************************/
+void bl1_print_next_bl_ep_info(const entry_point_info_t *bl_ep_info)
+{
+	NOTICE("BL1: Booting BL31\n");
+	print_entry_point_info(bl_ep_info);
+}
+
+#if SPIN_ON_BL1_EXIT
+void print_debug_loop_message(void)
+{
+	NOTICE("BL1: Debug loop, spinning forever\n");
+	NOTICE("BL1: Please connect the debugger to continue\n");
+}
+#endif
+