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

2026-09-06 03:52:57 +08:00
commit b1928b41c0
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+/*
+ * Copyright (c) 2016-2021, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <common/bl_common.h>
+#include <common/desc_image_load.h>
+#if defined(SPD_spmd)
+#include <plat/arm/common/fconf_arm_sp_getter.h>
+#endif
+#include <plat/arm/common/plat_arm.h>
+#include <plat/common/platform.h>
+
+#pragma weak plat_flush_next_bl_params
+#pragma weak plat_get_bl_image_load_info
+#pragma weak plat_get_next_bl_params
+
+static bl_params_t *next_bl_params_cpy_ptr;
+
+/*******************************************************************************
+ * This function flushes the data structures so that they are visible
+ * in memory for the next BL image.
+ ******************************************************************************/
+void plat_flush_next_bl_params(void)
+{
+	assert(next_bl_params_cpy_ptr != NULL);
+
+	flush_bl_params_desc_args(bl_mem_params_desc_ptr,
+		bl_mem_params_desc_num,
+		next_bl_params_cpy_ptr);
+}
+
+#if defined(SPD_spmd) && BL2_ENABLE_SP_LOAD
+/*******************************************************************************
+ * This function appends Secure Partitions to list of loadable images.
+ ******************************************************************************/
+static void plat_add_sp_images_load_info(struct bl_load_info *load_info)
+{
+	bl_load_info_node_t *curr_node = load_info->head;
+	bl_load_info_node_t *prev_node;
+
+	/* Shortcut for empty SP list */
+	if (sp_mem_params_descs[0].image_id == 0) {
+		ERROR("No Secure Partition Image available\n");
+		return;
+	}
+
+	/* Traverse through the bl images list */
+	do {
+		curr_node = curr_node->next_load_info;
+	} while (curr_node->next_load_info != NULL);
+
+	prev_node = curr_node;
+
+	for (unsigned int index = 0; index < MAX_SP_IDS; index++) {
+		if (sp_mem_params_descs[index].image_id == 0) {
+			return;
+		}
+		curr_node = &sp_mem_params_descs[index].load_node_mem;
+		/* Populate the image information */
+		curr_node->image_id = sp_mem_params_descs[index].image_id;
+		curr_node->image_info = &sp_mem_params_descs[index].image_info;
+
+		prev_node->next_load_info = curr_node;
+		prev_node = curr_node;
+	}
+
+	INFO("Reached Max number of SPs\n");
+}
+#endif
+
+/*******************************************************************************
+ * This function returns the list of loadable images.
+ ******************************************************************************/
+struct bl_load_info *plat_get_bl_image_load_info(void)
+{
+#if defined(SPD_spmd) && BL2_ENABLE_SP_LOAD
+	bl_load_info_t *bl_load_info;
+
+	bl_load_info = get_bl_load_info_from_mem_params_desc();
+	plat_add_sp_images_load_info(bl_load_info);
+
+	return bl_load_info;
+#else
+	return get_bl_load_info_from_mem_params_desc();
+#endif
+}
+
+/*******************************************************************************
+ * ARM helper function to return the list of executable images.Since the default
+ * descriptors are allocated within BL2 RW memory, this prevents BL31/BL32
+ * overlay of BL2 memory. Hence this function also copies the descriptors to a
+ * pre-allocated memory indicated by ARM_BL2_MEM_DESC_BASE.
+ ******************************************************************************/
+struct bl_params *arm_get_next_bl_params(void)
+{
+	bl_mem_params_node_t *bl2_mem_params_descs_cpy
+			= (bl_mem_params_node_t *)ARM_BL2_MEM_DESC_BASE;
+	const bl_params_t *next_bl_params;
+
+	next_bl_params_cpy_ptr =
+		(bl_params_t *)(ARM_BL2_MEM_DESC_BASE +
+		(bl_mem_params_desc_num * sizeof(bl_mem_params_node_t)));
+
+	/*
+	 * Copy the memory descriptors to ARM_BL2_MEM_DESC_BASE area.
+	 */
+	(void) memcpy(bl2_mem_params_descs_cpy, bl_mem_params_desc_ptr,
+		(bl_mem_params_desc_num * sizeof(bl_mem_params_node_t)));
+
+	/*
+	 * Modify the global 'bl_mem_params_desc_ptr' to point to the
+	 * copied location.
+	 */
+	bl_mem_params_desc_ptr = bl2_mem_params_descs_cpy;
+
+	next_bl_params = get_next_bl_params_from_mem_params_desc();
+	assert(next_bl_params != NULL);
+
+	/*
+	 * Copy 'next_bl_params' to the reserved location after the copied
+	 * memory descriptors.
+	 */
+	(void) memcpy(next_bl_params_cpy_ptr, next_bl_params,
+						(sizeof(bl_params_t)));
+
+	populate_next_bl_params_config(next_bl_params_cpy_ptr);
+
+	return next_bl_params_cpy_ptr;
+}
+
+/*******************************************************************************
+ * This function returns the list of executable images
+ ******************************************************************************/
+struct bl_params *plat_get_next_bl_params(void)
+{
+	return arm_get_next_bl_params();
+}
+