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>

common/spl/Kconfig

@@ -449,9 +449,17 @@ config SPL_POWER_SUPPORT
 	  in drivers/power, drivers/power/pmic and drivers/power/regulator
 	  as part of an SPL build.
 
+config SPL_RAM_SUPPORT
+	bool "Support booting from RAM"
+	depends on SPL
+	default y if MICROBLAZE || ARCH_SOCFPGA || TEGRA || ARCH_ZYNQ
+	help
+	  Enable booting of an image in RAM. The image can be preloaded or
+	  it can be loaded by SPL directly into RAM (e.g. using USB).
+
 config SPL_RAM_DEVICE
 	bool "Support booting from preloaded image in RAM"
-	depends on SPL
+	depends on SPL_RAM_SUPPORT
 	default y if MICROBLAZE || ARCH_SOCFPGA || TEGRA || ARCH_ZYNQ
 	help
 	  Enable booting of an image already loaded in RAM. The image has to
@@ -558,7 +566,7 @@ choice
 
 config SPL_DFU_RAM
 	bool "RAM device"
-	depends on SPL_DFU_SUPPORT
+	depends on SPL_DFU_SUPPORT && SPL_RAM_SUPPORT
 	help
 	 select RAM/DDR memory device for loading binary images
 	 (u-boot/kernel) to the selected device partition using

common/spl/Makefile

@@ -26,4 +26,5 @@ obj-$(CONFIG_SPL_EXT_SUPPORT) += spl_ext.o
 obj-$(CONFIG_SPL_SATA_SUPPORT) += spl_sata.o
 obj-$(CONFIG_SPL_DFU_SUPPORT) += spl_dfu.o
 obj-$(CONFIG_SPL_SPI_LOAD) += spl_spi.o
+obj-$(CONFIG_SPL_RAM_SUPPORT) += spl_ram.o
 endif

common/spl/spl.c

@@ -170,64 +170,6 @@ __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 	image_entry();
 }
 
-#ifndef CONFIG_SPL_LOAD_FIT_ADDRESS
-# define CONFIG_SPL_LOAD_FIT_ADDRESS	0
-#endif
-
-#if defined(CONFIG_SPL_RAM_DEVICE) || defined(CONFIG_SPL_DFU_SUPPORT)
-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("USB DFU", 0, BOOT_DEVICE_DFU, spl_ram_load_image);
-#endif
-#endif
-
 int spl_init(void)
 {
 	int ret;

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
+
+