bbfa199cbc
Everything required for remote kernel debugging over a serial connection. For FDT-based systems, a debug port can be specified by setting hw.fdt.dbgport to the desired device tree node in loader.conf. For example, hw.fdt.dbgport="uart1", or hw.fdt.dbgport="serial@ff1a0000". Looks good: emaste Tested by: rwatson MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D27727