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| author | Yoshihiro Takahashi <nyan@FreeBSD.org> | 2004-11-29 11:54:42 +0000 |
|---|---|---|
| committer | Yoshihiro Takahashi <nyan@FreeBSD.org> | 2004-11-29 11:54:42 +0000 |
| commit | 028d40a592e72741b5395aa9ae64a4c814c98afa (patch) | |
| tree | 6f17b2efe2af0adbd55b6affab65a744fb48037c /sys/boot | |
| parent | e354922c78a17ec8c3a745843c87cd707d0ee1e8 (diff) | |
| download | src-028d40a592e72741b5395aa9ae64a4c814c98afa.tar.gz src-028d40a592e72741b5395aa9ae64a4c814c98afa.zip | |
MFi386: revision 1.38.
Notes
Notes:
svn path=/head/; revision=138189
Diffstat (limited to 'sys/boot')
| -rw-r--r-- | sys/boot/pc98/btx/btx/btx.S | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/sys/boot/pc98/btx/btx/btx.S b/sys/boot/pc98/btx/btx/btx.S index 9100eb30973c..6ee9f8f35dac 100644 --- a/sys/boot/pc98/btx/btx/btx.S +++ b/sys/boot/pc98/btx/btx/btx.S @@ -1081,8 +1081,9 @@ putstr: lodsb # Load char .set SIO_FMT,SIOFMT # 8N1 .set SIO_DIV,(115200/SIOSPD) # 115200 / SPD +/* * void sio_init(void) - + */ sio_init: movw $SIO_PRT+0x3,%dx # Data format reg movb $SIO_FMT|0x80,%al # Set format outb %al,(%dx) # and DLAB @@ -1098,15 +1099,17 @@ sio_init: movw $SIO_PRT+0x3,%dx # Data format reg outb %al,(%dx) # DTR incl %edx # Line status reg +/* * void sio_flush(void) - + */ sio_flush.0: call sio_getc.1 # Get character sio_flush: call sio_ischar # Check for character jnz sio_flush.0 # Till none ret # To caller +/* * void sio_putc(int c) - + */ sio_putc: movw $SIO_PRT+0x5,%dx # Line status reg xor %ecx,%ecx # Timeout movb $0x40,%ch # counter @@ -1119,16 +1122,18 @@ sio_putc.1: inb (%dx),%al # Transmitter outb %al,(%dx) # Write character sio_putc.2: ret $0x4 # To caller +/* * int sio_getc(void) - + */ sio_getc: call sio_ischar # Character available? jz sio_getc # No sio_getc.1: subb $0x5,%dl # Receiver buffer reg inb (%dx),%al # Read character ret # To caller +/* * int sio_ischar(void) - + */ sio_ischar: movw $SIO_PRT+0x5,%dx # Line status register xorl %eax,%eax # Zero inb (%dx),%al # Received data |