velko / piloader Goto Github PK

Sometimes data sent via UART goes out of sync with what protocol expects.

If for some reason a single byte is not sent, bootloader will wait for one more, to complete command. It will take the byte from next packet. As a result, every subsequent command will not be recognized and bootloader will become useless. And, since it thinks it is in good state, the Watchdog is disabled as well. Then RasPi will not restart either.

Some method is needed to resynchronize the FIFO and software.

Status LED does not work on RPi 2. Led is now connected to different GPIO pin.

Currently there are no any checks if bootloader is not writing over itself.

To provide more stability, it could check target addresses before writing to them. And refuse if it overlaps with addresses containing bootloader itself.

Client is "too chatty" while loading kernel. This should be enabled using command-line switch.

While watchdog is very useful for untested code, there may be need to load some "tested" code which has to run longer than few seconds.

Kernel is loaded using VMA addresses from ELF file. Should use LMA instead.

These are equal most of the time, but might be not if starting to play with paging or something.

Currently there are ugly workaround masking out part of VMA address.

Should be able to load plain binary image at specified address.

EXEC command always start executing at address 0x00000000 instead of one specified in command packet's address field.