make some debugging uboot scripts

boot-script/Makefile

@@ -1,5 +1,7 @@
 # Recompile with:
 all:
-	mkimage -C none -A arm -T script -d sid.cmd sid.scr
 	mkimage -C none -A arm -T script -d simple.cmd simple.scr
+	mkimage -C none -A arm -T script -d debug.cmd  debug.scr
+
+	mkimage -C none -A arm -T script -d sid.cmd sid.scr
 	mkimage -C none -A arm -T script -d jcarr.cmd jcarr.scr

boot-script/debug.cmd

@@ -0,0 +1,6 @@
+# super simple pinebook script
+
+ext4ls mmc 1:1 /boot
+
+mmc info
+usb tree

boot-script/simple.cmd

@@ -1,18 +1,29 @@
 # super simple pinebook script
 
-ext4load mmc 1:1 ${ramdisk_addr_r} /boot/uInitrd-4.19.2-sunxi64
-ext4load mmc 1:1 ${kernel_addr_r}  /boot/vmlinuz-4.19.2-sunxi64
-
-setenv bootargs 'root=/dev/mmcblk2p1 console=ttyS0,115200 console=tty1'
-
-# from the armbian group:
-# setenv bootargs 'root=/dev/mmcblk2p1 rootwait rootfstype=ext4 console=ttyS0,115200 console=tty1 panic=10 consoleblank=0 loglevel=1 ubootpart=6526ddf3-01 usb-storage.quirks=0x2537:0x1066:u,0x2537:0x1068:u cgroup_enable=memory swapaccount=1 3'
-
-booti ${kernel_addr_r} ${ramdisk_addr_r} ${fdt_addr_r}
-
 # Recompile with:
 # mkimage -C none -A arm -T script -d simple.cmd simple.scr
 
 # then, at the u-boot prompt run:
 # ext4load mmc 1:1 ${scriptaddr}  /root/pinebook/boot-script/simple.scr
 # source ${scriptaddr}
+
+### BOOT SCRIPT START ####
+### BOOT SCRIPT START ####
+### BOOT SCRIPT START ####
+
+ext4load mmc 1:1 ${ramdisk_addr_r} /boot/uInitrd-4.19.2-sunxi64
+ext4load mmc 1:1 ${kernel_addr_r}  /boot/vmlinuz-4.19.2-sunxi64
+ext4load mmc 1:1 ${fdt_addr_r}     /boot/dtb/allwinner/sun50i-a64-pinebook.dtb
+
+setenv bootargs 'root=/dev/mmcblk2p1 console=ttyS0,115200 console=tty1'
+
+booti ${kernel_addr_r} ${ramdisk_addr_r} ${fdt_addr_r}
+
+### BOOT SCRIPT END. ####
+### BOOT SCRIPT END. ####
+### BOOT SCRIPT END. ####
+
+### Linux is now running. Nothing after this runs or 'exists' anymore.
+### Linux runs in the ARM architecture 'EL2' and 'EL1' level
+### ARM Power management is handled in the higher security level EL3
+### The only things left behind by u-boot are running in EL3