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Rick Richard
9db8ae83e6
uart_cpu_getdev() lets hw.uart.console override the FDT, but
uart_getenv() maps an "mm:" address with uart_bus_space_mem, which is
only assigned after the FDT probe. On riscv and arm it is still NULL
at that point, so bus_space_map() faults before there is a console.
On riscv this happens on any EFI boot where the firmware provides an
SPCR table, since the loader turns it into hw.uart.console.
Initialize uart_bus_space_mem to fdtbus_bs_tag, as uart_cpu_arm64.c
does with &memmap_bus (See also 0624eddcff).
PR: 299089
Reviewed by: mhorne
MFC after: 1 week
Signed-off-by: Rick Richard <[email protected]>