[boot] add u-boot patches for BeagleBone, BeagleBoard xM and PandaBoard

boot/u-boot_patches/sabayon+genkernel+initrd-boot+pandaboard.patch

@@ -0,0 +1,59 @@
+diff --git a/include/configs/omap4_common.h b/include/configs/omap4_common.h
+index a989721..4583a5a 100644
+--- a/include/configs/omap4_common.h
++++ b/include/configs/omap4_common.h
+@@ -150,32 +150,51 @@
+ 
+ #define CONFIG_EXTRA_ENV_SETTINGS \
+ 	"loadaddr=0x82000000\0" \
++	"rdaddr=0x81000000\0" \
+ 	"console=ttyO2,115200n8\0" \
+ 	"usbtty=cdc_acm\0" \
+ 	"vram=16M\0" \
++	"optargs=\0" \
+ 	"mmcdev=0\0" \
+ 	"mmcroot=/dev/mmcblk0p2 rw\0" \
+ 	"mmcrootfstype=ext3 rootwait\0" \
+ 	"mmcargs=setenv bootargs console=${console} " \
++		"${optargs} " \
+ 		"vram=${vram} " \
+ 		"root=${mmcroot} " \
+ 		"rootfstype=${mmcrootfstype}\0" \
+ 	"loadbootscript=fatload mmc ${mmcdev} ${loadaddr} boot.scr\0" \
+ 	"bootscript=echo Running bootscript from mmc${mmcdev} ...; " \
+ 		"source ${loadaddr}\0" \
+-	"loaduimage=fatload mmc ${mmcdev} ${loadaddr} uImage\0" \
++	"bootenv=uEnv.txt\0" \
++	"loadbootenv=fatload mmc ${mmcdev} ${loadaddr} ${bootenv}\0" \
++	"importbootenv=echo Importing environment from mmc ...; " \
++		"env import -t ${loadaddr} ${filesize}\0" \
++	"loaduimage=ext2load mmc ${mmcdev}:2 ${loadaddr} /boot/uImage\0" \
++	"loaduinitrd=ext2load mmc ${mmcdev}:2 ${rdaddr} /boot/uInitrd\0" \
+ 	"mmcboot=echo Booting from mmc${mmcdev} ...; " \
+ 		"run mmcargs; " \
+ 		"bootm ${loadaddr}\0" \
++	"mmcbootrd=echo Booting from mmc${mmcdev} (+initrd)...; " \
++		"run mmcargs; " \
++		"bootm ${loadaddr} ${rdaddr}\0" \
+ 
+ #define CONFIG_BOOTCOMMAND \
+ 	"if mmc rescan ${mmcdev}; then " \
++		"if run loadbootenv; then " \
++			"echo Loaded environment from ${bootenv};" \
++			"run importbootenv;" \
++		"fi;" \
+ 		"if run loadbootscript; then " \
+ 			"run bootscript; " \
+ 		"else " \
+ 			"if run loaduimage; then " \
+-				"run mmcboot; " \
+-			"fi; " \
++				"if run loaduinitrd; then " \
++					"run mmcbootrd;" \
++				"else " \
++					"run mmcboot;" \
++				"fi;" \
++			"fi;" \
+ 		"fi; " \
+ 	"fi"
+