zynq: Enable distro boot

Distro boot allows devices to boot using standardized boot methods by
default. This can be very handy for distributions that want to run on
different platforms.

This patch moves the zynq platform to use its old, zynq specific boot
method first and then fall back to distro boot. That way supporting
Linux distributions like openSUSE is much easier.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

include/configs/zynq-common.h

@@ -171,6 +171,50 @@
 /* enable preboot to be loaded before CONFIG_BOOTDELAY */
 #define CONFIG_PREBOOT
 
+/* Boot configuration */
+#define CONFIG_BOOTCOMMAND		"run $modeboot || run distro_bootcmd"
+#define CONFIG_SYS_LOAD_ADDR		0 /* default? */
+
+/* Distro boot enablement */
+
+#ifdef CONFIG_SPL_BUILD
+#define BOOTENV
+#else
+#include <config_distro_defaults.h>
+
+#ifdef CONFIG_CMD_MMC
+#define BOOT_TARGET_DEVICES_MMC(func) func(MMC, mmc, 0)
+#else
+#define BOOT_TARGET_DEVICES_MMC(func)
+#endif
+
+#ifdef CONFIG_CMD_USB
+#define BOOT_TARGET_DEVICES_USB(func) func(USB, usb, 0)
+#else
+#define BOOT_TARGET_DEVICES_USB(func)
+#endif
+
+#if defined(CONFIG_CMD_PXE)
+#define BOOT_TARGET_DEVICES_PXE(func) func(PXE, pxe, na)
+#else
+#define BOOT_TARGET_DEVICES_PXE(func)
+#endif
+
+#if defined(CONFIG_CMD_DHCP)
+#define BOOT_TARGET_DEVICES_DHCP(func) func(DHCP, dhcp, na)
+#else
+#define BOOT_TARGET_DEVICES_DHCP(func)
+#endif
+
+#define BOOT_TARGET_DEVICES(func) \
+	BOOT_TARGET_DEVICES_MMC(func) \
+	BOOT_TARGET_DEVICES_USB(func) \
+	BOOT_TARGET_DEVICES_PXE(func) \
+	BOOT_TARGET_DEVICES_DHCP(func)
+
+#include <config_distro_bootcmd.h>
+#endif /* CONFIG_SPL_BUILD */
+
 /* Default environment */
 #ifndef CONFIG_EXTRA_ENV_SETTINGS
 #define CONFIG_EXTRA_ENV_SETTINGS	\
@@ -182,6 +226,11 @@
 	"fdt_high=0x20000000\0"		\
 	"initrd_high=0x20000000\0"	\
 	"loadbootenv_addr=0x2000000\0" \
+	"fdt_addr_r=0x1f00000\0"        \
+	"pxefile_addr_r=0x2000000\0"    \
+	"kernel_addr_r=0x2000000\0"     \
+	"scriptaddr=0x3000000\0"        \
+	"ramdisk_addr_r=0x3100000\0"    \
 	"bootenv=uEnv.txt\0" \
 	"bootenv_dev=mmc\0" \
 	"loadbootenv=load ${bootenv_dev} 0 ${loadbootenv_addr} ${bootenv}\0" \
@@ -217,12 +266,10 @@
 			"echo Copying FIT from USB to RAM... && " \
 			"load usb 0 ${load_addr} ${fit_image} && " \
 			"bootm ${load_addr}; fi\0" \
-		DFU_ALT_INFO
+		DFU_ALT_INFO \
+		BOOTENV
 #endif
 
-#define CONFIG_BOOTCOMMAND		"run $modeboot"
-#define CONFIG_SYS_LOAD_ADDR		0 /* default? */
-
 /* Miscellaneous configurable options */
 
 #define CONFIG_CMDLINE_EDITING