Executing programs stored in external SPI flash memory on an ARM processor

Question

I have an ARM processor that is able to interface with an external flash memory chip. Written to the chip are programs compiled for the ARM architecture ready to be executed. Wh

Answer 1

It depends on kind of flash and/or the cpu. NOR flash is usually mapped into memory so you can jump directly into it. NAND flash must be read (which depends on SOC) into local memory (SRAM, DRAM (--> needs extra initialization!)).

EDIT:

SPI can not be mapped to RAM either. You have to program the SPI controller of the SOC and the SPI flash. The protocol to be used for the SPI flash is usually described in its manual; it is very likely that a common protocol so you can probably reuse an existing driver.