From 236963e7563be3e3f8220dac7bb4af446928e194 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Mon, 24 Jun 2024 22:55:29 -0400 Subject: Clean out for expt Signed-off-by: Ian Moffett --- sys/arch/amd64/isa/i8254.c | 75 ---------------------------------------------- 1 file changed, 75 deletions(-) delete mode 100644 sys/arch/amd64/isa/i8254.c (limited to 'sys/arch/amd64/isa/i8254.c') diff --git a/sys/arch/amd64/isa/i8254.c b/sys/arch/amd64/isa/i8254.c deleted file mode 100644 index f19fb6b..0000000 --- a/sys/arch/amd64/isa/i8254.c +++ /dev/null @@ -1,75 +0,0 @@ -/* - * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of Hyra nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include -#include -#include -#include - -/* - * Fetches the current count. - */ -uint16_t -i8254_get_count(void) -{ - uint8_t lo, hi; - - outb(i8254_COMMAND, 0x00); - lo = inb(0x40); - hi = inb(0x40); - return __COMBINE8(hi, lo); -} - -/* - * Set the reload value - * - * The reload value is where the i8254's counter - * starts... - */ -void -i8254_set_reload(uint16_t val) -{ - /* Channel 0, lo/hi access, rate generator */ - outb(i8254_COMMAND, 0x34); - - outb(0x40, (val & 0xFF)); - outb(0x40, (val >> 8) & 0xFF); -} - -void -i8254_set_frequency(uint64_t freq_hz) -{ - uint64_t divisor = i8254_DIVIDEND / freq_hz; - - if ((i8254_DIVIDEND % freq_hz) > (freq_hz / 2)) { - ++divisor; - } - - i8254_set_reload(freq_hz); -} -- cgit v1.2.3