Constant aw_fel::soc::A31_SRAM_SWAP_BUFFERS

const A31_SRAM_SWAP_BUFFERS: [SRAMSwapBuffers; 2]

Allwinner A31 SRAM swap buffers.

A31 is very similar to A10/A13/A20, except that it has no SRAM at 0x8000. So we use the SRAM section B at 0x20000–0x2FFFF instead. In the FEL mode, the MMU translation table is allocated by the BROM at 0x20000. But we can also safely use it as the backup storage because the MMU is temporarily disabled during the time of the SPL execution.