spl: move RAM boot support in separate file
Add a new top-level config option so support booting an image stored
in RAM. This allows to move the RAM boot support into a sparate file
and having a single condition to compile that file.
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
diff --git a/common/spl/spl_ram.c b/common/spl/spl_ram.c
new file mode 100644
index 0000000..b2645a1
--- /dev/null
+++ b/common/spl/spl_ram.c
@@ -0,0 +1,73 @@
+/*
+ * (C) Copyright 2016
+ * Xilinx, Inc.
+ *
+ * (C) Copyright 2016
+ * Toradex AG
+ *
+ * Michal Simek <michal.simek@xilinx.com>
+ * Stefan Agner <stefan.agner@toradex.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#include <common.h>
+#include <spl.h>
+#include <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 defined(CONFIG_SPL_DFU_SUPPORT)
+ 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 {
+ 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. For now, it will temporary fixed to address
+ * pointed by U-Boot.
+ */
+ header = (struct image_header *)
+ (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header));
+
+ spl_parse_image_header(spl_image, header);
+ }
+
+ return 0;
+}
+#if defined(CONFIG_SPL_RAM_DEVICE)
+SPL_LOAD_IMAGE_METHOD("RAM", 0, BOOT_DEVICE_RAM, spl_ram_load_image);
+#endif
+#if defined(CONFIG_SPL_DFU_SUPPORT)
+SPL_LOAD_IMAGE_METHOD("DFU", 0, BOOT_DEVICE_DFU, spl_ram_load_image);
+#endif
+
+