Intel: When reading/writing to registers implemented in the FPGA part on a system running Linux, use the ALT_WRITE_WORD / ALT_READ_WORD API functions described in socal.h of SoC EDS. Can you do it?

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Intel: When reading/writing registers implemented in the FPGA part on a system running Linux, use the ALT_WRITE_WORD / ALT_READ_WORD API functions described in socal.h of SoC EDS. Can you do it?

SoC EDS/DS-5 SoC FPGA

Category: SoCs
Tools: SoC EDS
device:-

No.
Not directly accessible by API functions in socal.h. The bodies of these functions are just pointer accesses

example)

#define alt_read_word(src) (*ALT_CAST(volatile uint32_t *, (src)))

Since it is a virtual address by MMU (Memory Management Unit) on Linux, it cannot be accessed unless the physical address is obtained using the mmap() function.

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