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authorIan Moffett <ian@osmora.org>2024-06-24 22:55:29 -0400
committerIan Moffett <ian@osmora.org>2024-06-24 22:55:29 -0400
commit236963e7563be3e3f8220dac7bb4af446928e194 (patch)
treee521ea226db0345bbb3679fffe09d96254b7dc73 /sys/arch/amd64/isa/i8254.c
parent214eadc62b5578f76c98a38a28f8b3d80ac4d6ad (diff)
Clean out for expt
Signed-off-by: Ian Moffett <ian@osmora.org>
Diffstat (limited to 'sys/arch/amd64/isa/i8254.c')
-rw-r--r--sys/arch/amd64/isa/i8254.c75
1 files changed, 0 insertions, 75 deletions
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 <machine/isa/i8254.h>
-#include <machine/io.h>
-#include <sys/types.h>
-#include <sys/cdefs.h>
-
-/*
- * 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);
-}