35 lines
2.3 KiB
C
35 lines
2.3 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "ape/lib/pc.h"
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#include "libc/calls/internal.h"
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#include "libc/nexgen32e/uart.internal.h"
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ssize_t writev$serial(struct Fd *fd, const struct iovec *iov, int iovlen) {
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size_t i, j, wrote = 0;
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for (i = 0; i < iovlen; ++i) {
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for (j = 0; j < iov[i].iov_len; ++j) {
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while (!(inb(fd->handle + UART_LSR) & UART_TTYTXR)) asm("pause");
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outb(fd->handle, ((char *)iov[i].iov_base)[j]);
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++wrote;
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}
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}
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return wrote;
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}
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