1/* 2 * Copyright (c) 1998 Robert Nordier 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are freely 6 * permitted provided that the above copyright notice and this 7 * paragraph and the following disclaimer are duplicated in all 8 * such forms. 9 * 10 * This software is provided "AS IS" and without any express or 11 * implied warranties, including, without limitation, the implied 12 * warranties of merchantability and fitness for a particular 13 * purpose. 14 *
| 1/* 2 * Copyright (c) 1998 Robert Nordier 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are freely 6 * permitted provided that the above copyright notice and this 7 * paragraph and the following disclaimer are duplicated in all 8 * such forms. 9 * 10 * This software is provided "AS IS" and without any express or 11 * implied warranties, including, without limitation, the implied 12 * warranties of merchantability and fitness for a particular 13 * purpose. 14 *
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15 * $FreeBSD: head/sys/boot/i386/boot2/sio.S 129240 2004-05-14 20:29:30Z ru $
| 15 * $FreeBSD: head/sys/boot/i386/boot2/sio.S 149212 2005-08-18 00:42:45Z iedowse $
|
16 */ 17 18 .set SIO_PRT,SIOPRT # Base port 19 .set SIO_FMT,SIOFMT # 8N1
| 16 */ 17 18 .set SIO_PRT,SIOPRT # Base port 19 .set SIO_FMT,SIOFMT # 8N1
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20 .set SIO_DIV,(115200/SIOSPD) # 115200 / SPD
| |
21 22 .globl sio_init 23 .globl sio_flush 24 .globl sio_putc 25 .globl sio_getc 26 .globl sio_ischar 27
| 20 21 .globl sio_init 22 .globl sio_flush 23 .globl sio_putc 24 .globl sio_getc 25 .globl sio_ischar 26
|
28/* void sio_init(void) */
| 27/* void sio_init(int div) */
|
29 30sio_init: movw $SIO_PRT+0x3,%dx # Data format reg 31 movb $SIO_FMT|0x80,%al # Set format 32 outb %al,(%dx) # and DLAB 33 pushl %edx # Save 34 subb $0x3,%dl # Divisor latch reg
| 28 29sio_init: movw $SIO_PRT+0x3,%dx # Data format reg 30 movb $SIO_FMT|0x80,%al # Set format 31 outb %al,(%dx) # and DLAB 32 pushl %edx # Save 33 subb $0x3,%dl # Divisor latch reg
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35 movw $SIO_DIV,%ax # Set
| 34 movl 0x8(%esp),%eax # Set
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36 outw %ax,(%dx) # BPS 37 popl %edx # Restore 38 movb $SIO_FMT,%al # Clear 39 outb %al,(%dx) # DLAB 40 incl %edx # Modem control reg 41 movb $0x3,%al # Set RTS, 42 outb %al,(%dx) # DTR 43 incl %edx # Line status reg
| 35 outw %ax,(%dx) # BPS 36 popl %edx # Restore 37 movb $SIO_FMT,%al # Clear 38 outb %al,(%dx) # DLAB 39 incl %edx # Modem control reg 40 movb $0x3,%al # Set RTS, 41 outb %al,(%dx) # DTR 42 incl %edx # Line status reg
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| 43 call sio_flush 44 ret $0x4
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44 45/* void sio_flush(void) */ 46 47sio_flush.0: call sio_getc.1 # Get character 48sio_flush: call sio_ischar # Check for character 49 jnz sio_flush.0 # Till none 50 ret # To caller 51
--- 29 unchanged lines hidden --- | 45 46/* void sio_flush(void) */ 47 48sio_flush.0: call sio_getc.1 # Get character 49sio_flush: call sio_ischar # Check for character 50 jnz sio_flush.0 # Till none 51 ret # To caller 52
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