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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+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2016
+ * Xilinx, Inc.
+ *
+ * (C) Copyright 2016
+ * Toradex AG
+ *
+ * Michal Simek <michal.simek@xilinx.com>
+ * Stefan Agner <stefan.agner@toradex.com>
+ */
+#include <common.h>
+#include <binman_sym.h>
+#include <mapmem.h>
+#include <spl.h>
+#include <linux/libfdt.h>
+
+#ifndef CONFIG_SPL_LOAD_FIT_ADDRESS
+# define CONFIG_SPL_LOAD_FIT_ADDRESS	0
+#endif
+
+static ulong spl_ram_load_read(struct spl_load_info *load, ulong sector,
+			       ulong count, void *buf)
+{
+	debug("%s: sector %lx, count %lx, buf %lx\n",
+	      __func__, sector, count, (ulong)buf);
+	memcpy(buf, (void *)(CONFIG_SPL_LOAD_FIT_ADDRESS + sector), count);
+	return count;
+}
+
+static int spl_ram_load_image(struct spl_image_info *spl_image,
+			      struct spl_boot_device *bootdev)
+{
+	struct image_header *header;
+
+	header = (struct image_header *)CONFIG_SPL_LOAD_FIT_ADDRESS;
+
+#if CONFIG_IS_ENABLED(DFU)
+	if (bootdev->boot_device == BOOT_DEVICE_DFU)
+		spl_dfu_cmd(0, "dfu_alt_info_ram", "ram", "0");
+#endif
+
+	if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
+	    image_get_magic(header) == FDT_MAGIC) {
+		struct spl_load_info load;
+
+		debug("Found FIT\n");
+		load.bl_len = 1;
+		load.read = spl_ram_load_read;
+		spl_load_simple_fit(spl_image, &load, 0, header);
+	} else {
+		ulong u_boot_pos = binman_sym(ulong, u_boot_any, image_pos);
+
+		debug("Legacy image\n");
+		/*
+		 * Get the header.  It will point to an address defined by
+		 * handoff which will tell where the image located inside
+		 * the flash.
+		 */
+		debug("u_boot_pos = %lx\n", u_boot_pos);
+		if (u_boot_pos == BINMAN_SYM_MISSING) {
+			/*
+			 * No binman support or no information. For now, fix it
+			 * to the address pointed to by U-Boot.
+			 */
+			u_boot_pos = (ulong)spl_get_load_buffer(-sizeof(*header),
+								sizeof(*header));
+		}
+		header = (struct image_header *)map_sysmem(u_boot_pos, 0);
+
+		spl_parse_image_header(spl_image, header);
+	}
+
+	return 0;
+}
+#if CONFIG_IS_ENABLED(RAM_DEVICE)
+SPL_LOAD_IMAGE_METHOD("RAM", 0, BOOT_DEVICE_RAM, spl_ram_load_image);
+#endif
+#if CONFIG_IS_ENABLED(DFU)
+SPL_LOAD_IMAGE_METHOD("DFU", 0, BOOT_DEVICE_DFU, spl_ram_load_image);
+#endif
+
+