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

source/trusted-firmware/trusted-firmware-a-2.8/plat/common/plat_bl1_common.c

@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2015-2021, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <errno.h>
+
+#include <platform_def.h>
+
+#include <arch_helpers.h>
+#include <bl1/bl1.h>
+#include <common/bl_common.h>
+#include <common/debug.h>
+#include <plat/common/platform.h>
+
+/*
+ * The following platform functions are weakly defined. They
+ * are default implementations that allow BL1 to compile in
+ * absence of real definitions. The Platforms may override
+ * with more complex definitions.
+ */
+#pragma weak bl1_plat_get_next_image_id
+#pragma weak bl1_plat_set_ep_info
+#pragma weak bl1_plat_get_image_desc
+#pragma weak bl1_plat_fwu_done
+#pragma weak bl1_plat_handle_pre_image_load
+#pragma weak bl1_plat_handle_post_image_load
+
+unsigned int bl1_plat_get_next_image_id(void)
+{
+	/* BL2 load will be done by default. */
+	return BL2_IMAGE_ID;
+}
+
+void bl1_plat_set_ep_info(unsigned int image_id,
+		struct entry_point_info *ep_info)
+{
+
+}
+
+int bl1_plat_handle_pre_image_load(unsigned int image_id)
+{
+	return 0;
+}
+
+/*
+ * Following is the default definition that always
+ * returns BL2 image details.
+ */
+struct image_desc *bl1_plat_get_image_desc(unsigned int image_id)
+{
+	static image_desc_t bl2_img_desc = BL2_IMAGE_DESC;
+	return &bl2_img_desc;
+}
+
+__dead2 void bl1_plat_fwu_done(void *client_cookie, void *reserved)
+{
+	while (true)
+		wfi();
+}
+
+/*
+ * The Platforms must override with real definition.
+ */
+#pragma weak bl1_plat_mem_check
+
+int bl1_plat_mem_check(uintptr_t mem_base, unsigned int mem_size,
+		unsigned int flags)
+{
+	assert(0);
+	return -ENOMEM;
+}
+
+/*
+ * Default implementation for bl1_plat_handle_post_image_load(). This function
+ * populates the default arguments to BL2. The BL2 memory layout structure
+ * is allocated and the calculated layout is populated in arg1 to BL2.
+ */
+int bl1_plat_handle_post_image_load(unsigned int image_id)
+{
+	meminfo_t *bl2_secram_layout;
+	meminfo_t *bl1_secram_layout;
+	image_desc_t *image_desc;
+	entry_point_info_t *ep_info;
+
+	if (image_id != BL2_IMAGE_ID)
+		return 0;
+
+	/* Get the image descriptor */
+	image_desc = bl1_plat_get_image_desc(BL2_IMAGE_ID);
+	assert(image_desc != NULL);
+
+	/* Get the entry point info */
+	ep_info = &image_desc->ep_info;
+
+	/* Find out how much free trusted ram remains after BL1 load */
+	bl1_secram_layout = bl1_plat_sec_mem_layout();
+
+	/*
+	 * Create a new layout of memory for BL2 as seen by BL1 i.e.
+	 * tell it the amount of total and free memory available.
+	 * This layout is created at the first free address visible
+	 * to BL2. BL2 will read the memory layout before using its
+	 * memory for other purposes.
+	 */
+	bl2_secram_layout = (meminfo_t *) bl1_secram_layout->total_base;
+
+	bl1_calc_bl2_mem_layout(bl1_secram_layout, bl2_secram_layout);
+
+	ep_info->args.arg1 = (uintptr_t)bl2_secram_layout;
+
+	VERBOSE("BL1: BL2 memory layout address = %p\n",
+		(void *) bl2_secram_layout);
+	return 0;
+}