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Last change
on this file since 444 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
1.0 KB
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| 1 | /* outbyte.S -- Write one byte for OpenRISC 1000. |
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| 2 | * |
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| 3 | * Copyright (c) 2014 Authors |
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| 4 | * |
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| 5 | * Contributor Stefan Wallentowitz <stefan.wallentowitz@tum.de> |
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| 6 | * |
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| 7 | * The authors hereby grant permission to use, copy, modify, distribute, |
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| 8 | * and license this software and its documentation for any purpose, provided |
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| 9 | * that existing copyright notices are retained in all copies and that this |
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| 10 | * notice is included verbatim in any distributions. No written agreement, |
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| 11 | * license, or royalty fee is required for any of the authorized uses. |
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| 12 | * Modifications to this software may be copyrighted by their authors |
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| 13 | * and need not follow the licensing terms described here, provided that |
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| 14 | * the new terms are clearly indicated on the first page of each file where |
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| 15 | * they apply. |
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| 16 | */ |
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| 17 | |
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| 18 | #include "include/or1k-asm.h" |
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| 19 | |
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| 20 | .global _or1k_outbyte |
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| 21 | |
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| 22 | .text |
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| 23 | _or1k_outbyte: |
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| 24 | LOAD_SYMBOL_2_GPR(r4,_or1k_board_uart_base) |
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| 25 | l.lwz r4, 0(r4) |
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| 26 | l.sfeq r4, r0 |
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| 27 | OR1K_DELAYED_NOP(l.bf .Lnouart) |
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| 28 | .Luart: |
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| 29 | OR1K_DELAYED_NOP(l.j _or1k_uart_write) |
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| 30 | .Lnouart: |
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| 31 | OR1K_DELAYED( |
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| 32 | OR1K_INST(l.nop 0x4), |
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| 33 | OR1K_INST(l.jr r9) |
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| 34 | ) |
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