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Some platforms (such as the Sipeed Lichee Pi 4A) choose to make early debugging entertainingly cumbersome for the programmer. These platforms not only fail to provide a functional SBI debug console, but also choose to place the UART at a physical address that cannot be identity-mapped under the only paging model supported by the CPU. Support such platforms by creating a virtual address mapping for the early UART (in the 2MB megapage immediately below iPXE itself), and using this as the UART base address whenever paging is enabled. Signed-off-by: Michael Brown <mcb30@ipxe.org>
iPXE README File Quick start guide: cd src make For any more detailed instructions, see http://ipxe.org