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Instead of just "knowing" that ao_boot_loader will be passed zero when
the application wants to get back to the boot loader, explicitly
define the values so that both sides always agree.
Signed-off-by: Keith Packard <keithp@keithp.com>
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This causes the flash loader startup code to fall into the loader when
the application sets the boot address to zero.
Signed-off-by: Keith Packard <keithp@keithp.com>
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If the first block of boot memory has been smashed, and the start
address is bogus, don't bother trying to jump to the
application. This makes the system more resiliant to flash failures,
presuming the loader erases the first block, programs the other blocks
and then finally comes back to program the first block.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Split out code into separate files.
Add support for getting back to boot loader from application.
Signed-off-by: Keith Packard <keithp@keithp.com>
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