Separated serial boot block interface routine into NS16550 stuff and
i8251 stuff.
This commit is contained in:
kato
parent
98310ba5f0
commit
1f650b7e9c
@ -50,152 +50,8 @@ NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Serial bootblock interface routines
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* Copyright (c) 1994, J"org Wunsch
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* THE AUTHOR ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. THE AUTHOR DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*/
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#if COMCONSOLE == 0x238
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#include "../../../i386/boot/biosboot/serial.S"
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#include "serial_16550.S"
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#else
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/*
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* modified for PC-98 by KATO T. of Nagoya University
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*/
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.file "serial.S"
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#include <isa/sioreg.h>
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#include "asm.h"
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.text
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/*
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* The serial port interface routines implement a simple polled i/o
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* interface to a standard serial port. Due to the space restrictions
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* for the boot blocks, no BIOS support is used (since BIOS requires
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* expensive real/protected mode switches), instead the rudimentary
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* BIOS support is duplicated here.
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*
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* The base address for the i/o port is passed from the Makefile in
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* the COMCONSOLE preprocessor macro. Console parameters are currently
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* hard-coded to 9600 Bd, 8 bit. This can be changed in the
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* init_serial() function.
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*/
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/*
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* void serial_putc(char ch)
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* send ch to serial port
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*
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*/
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ENTRY(serial_putc)
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mov $COMCONSOLE + 2, %edx # line status reg
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1: inb %dx, %al
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testb $0x01, %al
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jz 1b # TX buffer not empty
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movb 0x4(%esp), %al
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sub $2, %edx # TX output reg
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outb %al, %dx # send this one
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ret
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/*
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* int serial_getc(void)
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* read a character from serial port
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*/
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ENTRY(serial_getc)
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mov $COMCONSOLE + 2, %edx # line status reg
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1:
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inb %dx, %al
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testb $0x02, %al
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jz 1b # no RX char available
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xorb %eax, %eax
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subb $2, %edx # RX buffer reg
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inb %dx, %al # fetch (first) character
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cmp $0x7F, %eax # make DEL...
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jne 2f
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movb $0x08, %eax # look like BS
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2:
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ret
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/*
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* int serial_ischar(void)
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* if there is a character pending, return true; otherwise return 0
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*/
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ENTRY(serial_ischar)
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xorl %eax, %eax
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movl $COMCONSOLE + 2, %edx # line status reg
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inb %dx, %al
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andb $0x02, %al # RX char available?
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ret
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/*
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* void init_serial(void)
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* initialize the serial console port to 9600 Bd, 8 bpc
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*/
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ENTRY(init_serial)
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/* set 8253 */
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movb 0xb6, %al
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outb %al, $0x77
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movl $COMCONSOLE_CLK, %eax
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outb %al, $0x75
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inb $0x5f, %al
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movb %ah, %al
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outb %al, $0x75
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/* inhibit com int */
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inb $0x35, %al
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andb $0xf8, %al
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movb %al, %ah
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inb $0x5f, %al
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movb %ah, %al
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outb %al, $0x35
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inb $0x02, %al
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orb $0x10, %al
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outb %al, $0x02
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/* dummy command */
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xorb %al,%al
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movl $COMCONSOLE + 2, %edx
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outb %al, %dx
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inb $0x5f, %al
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xorb %al,%al
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outb %al, %dx
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inb $0x5f, %al
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xorb %al,%al
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outb %al, %dx
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inb $0x5f, %al
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/* RESET 8251 */
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movb $0x40, %al
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outb %al, %dx
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movb $COMCONSOLE_MODE , %al
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andb $0xfc, %al
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orb $0x02, %al /* factor = 1/16 */
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outb %al, %dx
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inb $0x5f, %al
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/* start RS-232C */
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movb $0x37, %al
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outb %al, %dx
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ret
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#include "serial_8251.S"
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#endif
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181
sys/boot/pc98/boot2/serial_16550.S
Normal file
181
sys/boot/pc98/boot2/serial_16550.S
Normal file
@ -0,0 +1,181 @@
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/*
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* Mach Operating System
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* Copyright (c) 1992, 1991 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
|
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*
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* from: Mach, Revision 2.2 92/04/04 11:34:26 rpd
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* $FreeBSD$
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*/
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/*
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Copyright 1988, 1989, 1990, 1991, 1992
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by Intel Corporation, Santa Clara, California.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and
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its documentation for any purpose and without fee is hereby
|
||||
granted, provided that the above copyright notice appears in all
|
||||
copies and that both the copyright notice and this permission notice
|
||||
appear in supporting documentation, and that the name of Intel
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not be used in advertising or publicity pertaining to distribution
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of the software without specific, written prior permission.
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INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
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INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
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IN NO EVENT SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
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CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
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NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Serial bootblock interface routines
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* Copyright (c) 1994, J"org Wunsch
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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||||
* notice and this permission notice appear in all copies of the
|
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* software, derivative works or modified versions, and any portions
|
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* thereof, and that both notices appear in supporting documentation.
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*
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* THE AUTHOR ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. THE AUTHOR DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*/
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.file "serial.S"
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#include <isa/sioreg.h>
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#include "asm.h"
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.text
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/*
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* The serial port interface routines implement a simple polled i/o
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* interface to a standard serial port. Due to the space restrictions
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* for the boot blocks, no BIOS support is used (since BIOS requires
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* expensive real/protected mode switches), instead the rudimentary
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* BIOS support is duplicated here.
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*
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* The base address and speed for the i/o port are passed from the
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* Makefile in the COMCONSOLE and CONSPEED preprocessor macros. The
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* line control parameters are currently hard-coded to 8 bits, no
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* parity, 1 stop bit (8N1). This can be changed in init_serial().
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*/
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/*
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* void serial_putc(int ch);
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* Write character `ch' to port COMCONSOLE.
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*/
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ENTRY(serial_putc)
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movl $10000, %ecx # timeout
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movl $COMCONSOLE + 5, %edx # line status reg
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1:
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decl %ecx
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je 2f
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inb %dx, %al
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testb $0x20, %al
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je 1b # TX buffer not empty
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movb 4(%esp), %al
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subl $5, %edx # TX output reg
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outb %al, %dx # send this one
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2:
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ret
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/*
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* int serial_getc(void);
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* Read a character from port COMCONSOLE.
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*/
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ENTRY(serial_getc)
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mov $COMCONSOLE + 5, %edx # line status reg
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1:
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inb %dx, %al
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testb $0x01, %al
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je 1b # no rx char available
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xorl %eax, %eax
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subl $5, %edx # rx buffer reg
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inb %dx, %al # fetch (first) character
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andb $0x7F, %al # remove any parity bits we get
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cmpb $0x7F, %al # make DEL...
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jne 2f
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movb $0x08, %al # look like BS
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2:
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ret
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/*
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* int serial_ischar(void);
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* If there is a character in the input buffer of port COMCONSOLE,
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* return nonzero; otherwise return 0.
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*/
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ENTRY(serial_ischar)
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xorl %eax, %eax
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movl $COMCONSOLE + 5, %edx # line status reg
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inb %dx, %al
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andb $0x01, %al # rx char available?
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ret
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/*
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* void init_serial(void);
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* Initialize port COMCONSOLE to speed CONSPEED, line settings 8N1.
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*/
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ENTRY(init_serial)
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movl $COMCONSOLE + 3, %edx # line control reg
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movb $0x80, %al
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outb %al, %dx # enable DLAB
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subl $3, %edx # divisor latch, low byte
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movb $COMBRD(CONSPEED) & 0xff, %al
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outb %al, %dx
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incl %edx # divisor latch, high byte
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movb $COMBRD(CONSPEED) >> 8, %al
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outb %al, %dx
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incl %edx # fifo control register (if any)
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xorl %eax,%eax
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outb %al, %dx # disable fifo to reduce worst-case busy-wait
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incl %edx # line control reg
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movb $0x03, %al
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outb %al, %dx # 8N1
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incl %edx # modem control reg
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outb %al, %dx # enable DTR/RTS
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/* Flush the input buffer. */
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incl %edx # line status reg
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1:
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subl $5, %edx # rx buffer reg
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inb %dx, %al # throw away (unconditionally the first time)
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addl $5, %edx # line status reg
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inb %dx, %al
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testb $0x01, %al
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jne 1b # more
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ret
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198
sys/boot/pc98/boot2/serial_8251.S
Normal file
198
sys/boot/pc98/boot2/serial_8251.S
Normal file
@ -0,0 +1,198 @@
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/*
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* Mach Operating System
|
||||
* Copyright (c) 1992, 1991 Carnegie Mellon University
|
||||
* All Rights Reserved.
|
||||
*
|
||||
* Permission to use, copy, modify and distribute this software and its
|
||||
* documentation is hereby granted, provided that both the copyright
|
||||
* notice and this permission notice appear in all copies of the
|
||||
* software, derivative works or modified versions, and any portions
|
||||
* thereof, and that both notices appear in supporting documentation.
|
||||
*
|
||||
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
|
||||
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
|
||||
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
||||
*
|
||||
* Carnegie Mellon requests users of this software to return to
|
||||
*
|
||||
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
||||
* School of Computer Science
|
||||
* Carnegie Mellon University
|
||||
* Pittsburgh PA 15213-3890
|
||||
*
|
||||
* any improvements or extensions that they make and grant Carnegie Mellon
|
||||
* the rights to redistribute these changes.
|
||||
*
|
||||
* from: Mach, Revision 2.2 92/04/04 11:34:26 rpd
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
/*
|
||||
Copyright 1988, 1989, 1990, 1991, 1992
|
||||
by Intel Corporation, Santa Clara, California.
|
||||
|
||||
All Rights Reserved
|
||||
|
||||
Permission to use, copy, modify, and distribute this software and
|
||||
its documentation for any purpose and without fee is hereby
|
||||
granted, provided that the above copyright notice appears in all
|
||||
copies and that both the copyright notice and this permission notice
|
||||
appear in supporting documentation, and that the name of Intel
|
||||
not be used in advertising or publicity pertaining to distribution
|
||||
of the software without specific, written prior permission.
|
||||
|
||||
INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
|
||||
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
|
||||
IN NO EVENT SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
|
||||
CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
|
||||
LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
|
||||
NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
|
||||
WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Serial bootblock interface routines
|
||||
* Copyright (c) 1994, J"org Wunsch
|
||||
*
|
||||
* Permission to use, copy, modify and distribute this software and its
|
||||
* documentation is hereby granted, provided that both the copyright
|
||||
* notice and this permission notice appear in all copies of the
|
||||
* software, derivative works or modified versions, and any portions
|
||||
* thereof, and that both notices appear in supporting documentation.
|
||||
*
|
||||
* THE AUTHOR ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
|
||||
* CONDITION. THE AUTHOR DISCLAIMS ANY LIABILITY OF ANY KIND FOR
|
||||
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
||||
*/
|
||||
|
||||
/*
|
||||
* modified for PC-98 by KATO T. of Nagoya University
|
||||
*/
|
||||
|
||||
.file "serial.S"
|
||||
|
||||
#include <isa/sioreg.h>
|
||||
#include "asm.h"
|
||||
|
||||
.text
|
||||
|
||||
/*
|
||||
* The serial port interface routines implement a simple polled i/o
|
||||
* interface to a standard serial port. Due to the space restrictions
|
||||
* for the boot blocks, no BIOS support is used (since BIOS requires
|
||||
* expensive real/protected mode switches), instead the rudimentary
|
||||
* BIOS support is duplicated here.
|
||||
*
|
||||
* The base address for the i/o port is passed from the Makefile in
|
||||
* the COMCONSOLE preprocessor macro. Console parameters are currently
|
||||
* hard-coded to 9600 Bd, 8 bit. This can be changed in the
|
||||
* init_serial() function.
|
||||
*/
|
||||
|
||||
/*
|
||||
* void serial_putc(char ch)
|
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* send ch to serial port
|
||||
*
|
||||
*/
|
||||
|
||||
ENTRY(serial_putc)
|
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mov $COMCONSOLE + 2, %edx # line status reg
|
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1: inb %dx, %al
|
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testb $0x01, %al
|
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jz 1b # TX buffer not empty
|
||||
|
||||
movb 0x4(%esp), %al
|
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|
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sub $2, %edx # TX output reg
|
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outb %al, %dx # send this one
|
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|
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ret
|
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|
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/*
|
||||
* int serial_getc(void)
|
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* read a character from serial port
|
||||
*/
|
||||
|
||||
ENTRY(serial_getc)
|
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mov $COMCONSOLE + 2, %edx # line status reg
|
||||
1:
|
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inb %dx, %al
|
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testb $0x02, %al
|
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jz 1b # no RX char available
|
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|
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xorb %eax, %eax
|
||||
subb $2, %edx # RX buffer reg
|
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inb %dx, %al # fetch (first) character
|
||||
|
||||
cmp $0x7F, %eax # make DEL...
|
||||
jne 2f
|
||||
movb $0x08, %eax # look like BS
|
||||
2:
|
||||
ret
|
||||
|
||||
/*
|
||||
* int serial_ischar(void)
|
||||
* if there is a character pending, return true; otherwise return 0
|
||||
*/
|
||||
ENTRY(serial_ischar)
|
||||
xorl %eax, %eax
|
||||
movl $COMCONSOLE + 2, %edx # line status reg
|
||||
inb %dx, %al
|
||||
andb $0x02, %al # RX char available?
|
||||
|
||||
ret
|
||||
|
||||
/*
|
||||
* void init_serial(void)
|
||||
* initialize the serial console port to 9600 Bd, 8 bpc
|
||||
*/
|
||||
ENTRY(init_serial)
|
||||
/* set 8253 */
|
||||
movb 0xb6, %al
|
||||
outb %al, $0x77
|
||||
movl $COMCONSOLE_CLK, %eax
|
||||
outb %al, $0x75
|
||||
inb $0x5f, %al
|
||||
movb %ah, %al
|
||||
outb %al, $0x75
|
||||
|
||||
/* inhibit com int */
|
||||
inb $0x35, %al
|
||||
andb $0xf8, %al
|
||||
movb %al, %ah
|
||||
inb $0x5f, %al
|
||||
movb %ah, %al
|
||||
outb %al, $0x35
|
||||
|
||||
inb $0x02, %al
|
||||
orb $0x10, %al
|
||||
outb %al, $0x02
|
||||
|
||||
/* dummy command */
|
||||
xorb %al,%al
|
||||
movl $COMCONSOLE + 2, %edx
|
||||
outb %al, %dx
|
||||
inb $0x5f, %al
|
||||
xorb %al,%al
|
||||
outb %al, %dx
|
||||
inb $0x5f, %al
|
||||
xorb %al,%al
|
||||
outb %al, %dx
|
||||
inb $0x5f, %al
|
||||
|
||||
/* RESET 8251 */
|
||||
movb $0x40, %al
|
||||
outb %al, %dx
|
||||
|
||||
movb $COMCONSOLE_MODE , %al
|
||||
andb $0xfc, %al
|
||||
orb $0x02, %al /* factor = 1/16 */
|
||||
outb %al, %dx
|
||||
inb $0x5f, %al
|
||||
|
||||
/* start RS-232C */
|
||||
movb $0x37, %al
|
||||
outb %al, %dx
|
||||
|
||||
ret
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user