18 lines
687 B
Markdown
18 lines
687 B
Markdown
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# FDMA
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The STi7105 SoC has two FDMA instances, each FDMA instance has a small CPU called SLIM.
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The firmware of the SLIM processor is required to be loaded into the IMEM and DMEM mapped in
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the FDMA address space. The firmware files can be acquired from STLinux distribution.
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## The CPU
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### Firmware
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The firmware is an ELF file which has an `e_machine` of `EM_MAX(102)`. However the actual
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processor architecture is unknown since the ELF machine ID might be reserved when this architecture
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is developed.
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### Instruction memory
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The instruction memory mapped in the FDMA space is unique, the upper 8 bits of each 32bit word is
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always zero. Values written to the MSB will read out as 0.
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