FreeCalypso > hg > freecalypso-tools
view target-utils/loadagent/serextra.S @ 921:74d284add54d
fc-fsio: guard against bogus readdir results from the target
If the FFS being operated on contains SE K2x0 extended filenames,
readdir will return strings that are bad for printing. We need to
guard against this possibility, and also against possible other
bogosity that could be sent by other alien firmwares.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sat, 31 Dec 2022 22:55:23 +0000 |
parents | 3229940734e5 |
children |
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#include "ns16550.h" @ extra serial I/O functions for loadagent binary operations .text .code 32 .globl serial_out_if_empty serial_out_if_empty: ldr r1, =uart_base ldr r2, [r1] ldrb r3, [r2, #NS16550_LSR] tst r3, #NS16550_LSR_THRE strneb r0, [r2, #NS16550_THR] bx lr