| /* outbyte.S -- Write one byte for OpenRISC 1000. |
| * |
| * Copyright (c) 2014 Authors |
| * |
| * Contributor Stefan Wallentowitz <stefan.wallentowitz@tum.de> |
| * |
| * The authors hereby grant permission to use, copy, modify, distribute, |
| * and license this software and its documentation for any purpose, provided |
| * that existing copyright notices are retained in all copies and that this |
| * notice is included verbatim in any distributions. No written agreement, |
| * license, or royalty fee is required for any of the authorized uses. |
| * Modifications to this software may be copyrighted by their authors |
| * and need not follow the licensing terms described here, provided that |
| * the new terms are clearly indicated on the first page of each file where |
| * they apply. |
| */ |
| |
| #include "include/or1k-asm.h" |
| |
| .global _or1k_outbyte |
| |
| .text |
| _or1k_outbyte: |
| LOAD_SYMBOL_2_GPR(r4,_or1k_board_uart_base) |
| l.lwz r4, 0(r4) |
| l.sfeq r4, r0 |
| OR1K_DELAYED_NOP(l.bf .Lnouart) |
| .Luart: |
| OR1K_DELAYED_NOP(l.j _or1k_uart_write) |
| .Lnouart: |
| OR1K_DELAYED( |
| OR1K_INST(l.nop 0x4), |
| OR1K_INST(l.jr r9) |
| ) |
