[U-Boot] Dual boot Images in Flash

[Wolfgang Denk]

Dear "Gupta, Pekon",

In message <20980858CB6D3A4BAE95CA194937D5E73EA186A6 at DBDE04.ent.ti.com> you wrote:
>
> you can tweak your hardware to split it, and many micro-controllers
> do it (especially for safety critical applications). Example:
> Suppose 'default' entry-point (or reset entry-point) = 0x0000_0000,
> Now OR your MSB bit with the fault-signal or boot-error-flag.

Define "fault-signal" and "boot-error-flag".  Thise may exist on your
chip, but they don't on the overwhelming majority of systems.

> reset-addr[31] = reset-addr_internal[31] | boot_error_flag;
> So in case when you primary boot fails, and boot_error_flags is set,
> next time when you boot, the address transforms into 0x1000_0000

This will only work on very specific hardware.


Best regards,

Wolfgang Denk

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