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Move discard check up and do it only for error status

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(per Bruce suggestion). It speedup things for a little.
Remove l_start optimization, call l_start always (per Bruce suggestion)
This commit is contained in:
Andrey A. Chernov 1995-03-28 19:22:11 +00:00
parent 84351cc95c
commit 0e933b8841
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=7448
3 changed files with 63 additions and 69 deletions
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36
sys/dev/sio/sio.c
View file

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* $Id: sio.c,v 1.75 1995/03/28 11:13:44 ache Exp $
* $Id: sio.c,v 1.76 1995/03/28 12:26:40 ache Exp $
*/
#include "sio.h"
@ -1100,6 +1100,21 @@ siointr1(com)
recv_data = 0;
else
recv_data = inb(com->data_port);
if (line_status & (LSR_PE|LSR_OE|LSR_FE|LSR_BI)) {
if (line_status & LSR_OE)
CE_RECORD(com, CE_OVERRUN);
/*
Don't store PE if IGNPAR and BI if IGNBRK,
this hack allows "raw" tty optimization
works even if IGN* is set.
Assume TTY_OE mapped to TTY_PE
*/
if ( (line_status & (LSR_PE|LSR_OE|LSR_FE))
&& (com->tp->t_iflag & IGNPAR)
|| (line_status & LSR_BI)
&& (com->tp->t_iflag & IGNBRK))
goto cont;
}
++com->bytes_in;
if (com->hotchar != 0 && recv_data == com->hotchar)
setsofttty();
@ -1121,29 +1136,15 @@ siointr1(com)
if (com->iptr - com->ibuf == 8)
setsofttty();
#endif
/*
Don't store PE if IGNPAR and BI if IGNBRK,
this hack allows "raw" tty optimization
works even if IGN* is set.
Assume TTY_OE mapped to TTY_PE
*/
if ( (!(line_status & (LSR_PE|LSR_OE|LSR_FE))
|| !(com->tp->t_iflag & IGNPAR))
&& (!(line_status & LSR_BI)
|| !(com->tp->t_iflag & IGNBRK))) {
ioptr[0] = recv_data;
ioptr[CE_INPUT_OFFSET] = line_status;
com->iptr = ++ioptr;
}
if (ioptr == com->ihighwater
&& com->state & CS_RTS_IFLOW)
outb(com->modem_ctl_port,
com->mcr_image &= ~MCR_RTS);
/* XXX - move this out of isr */
if (line_status & LSR_OE)
CE_RECORD(com, CE_OVERRUN);
}
cont:
/*
* "& 0x7F" is to avoid the gcc-1.40 generating a slow
* jump from the top of the loop to here
@ -1525,10 +1526,7 @@ siopoll()
}
if (com->state & CS_ODONE) {
comflush(com);
if (linesw[tp->t_line].l_start != ttstart)
(*linesw[tp->t_line].l_start)(tp);
else
comstart(tp);
}
if (incc <= 0 || !(tp->t_state & TS_ISOPEN))
continue;

36
sys/i386/isa/sio.c
View file

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* $Id: sio.c,v 1.75 1995/03/28 11:13:44 ache Exp $
* $Id: sio.c,v 1.76 1995/03/28 12:26:40 ache Exp $
*/
#include "sio.h"
@ -1100,6 +1100,21 @@ siointr1(com)
recv_data = 0;
else
recv_data = inb(com->data_port);
if (line_status & (LSR_PE|LSR_OE|LSR_FE|LSR_BI)) {
if (line_status & LSR_OE)
CE_RECORD(com, CE_OVERRUN);
/*
Don't store PE if IGNPAR and BI if IGNBRK,
this hack allows "raw" tty optimization
works even if IGN* is set.
Assume TTY_OE mapped to TTY_PE
*/
if ( (line_status & (LSR_PE|LSR_OE|LSR_FE))
&& (com->tp->t_iflag & IGNPAR)
|| (line_status & LSR_BI)
&& (com->tp->t_iflag & IGNBRK))
goto cont;
}
++com->bytes_in;
if (com->hotchar != 0 && recv_data == com->hotchar)
setsofttty();
@ -1121,29 +1136,15 @@ siointr1(com)
if (com->iptr - com->ibuf == 8)
setsofttty();
#endif
/*
Don't store PE if IGNPAR and BI if IGNBRK,
this hack allows "raw" tty optimization
works even if IGN* is set.
Assume TTY_OE mapped to TTY_PE
*/
if ( (!(line_status & (LSR_PE|LSR_OE|LSR_FE))
|| !(com->tp->t_iflag & IGNPAR))
&& (!(line_status & LSR_BI)
|| !(com->tp->t_iflag & IGNBRK))) {
ioptr[0] = recv_data;
ioptr[CE_INPUT_OFFSET] = line_status;
com->iptr = ++ioptr;
}
if (ioptr == com->ihighwater
&& com->state & CS_RTS_IFLOW)
outb(com->modem_ctl_port,
com->mcr_image &= ~MCR_RTS);
/* XXX - move this out of isr */
if (line_status & LSR_OE)
CE_RECORD(com, CE_OVERRUN);
}
cont:
/*
* "& 0x7F" is to avoid the gcc-1.40 generating a slow
* jump from the top of the loop to here
@ -1525,10 +1526,7 @@ siopoll()
}
if (com->state & CS_ODONE) {
comflush(com);
if (linesw[tp->t_line].l_start != ttstart)
(*linesw[tp->t_line].l_start)(tp);
else
comstart(tp);
}
if (incc <= 0 || !(tp->t_state & TS_ISOPEN))
continue;

36
sys/isa/sio.c
View file

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* $Id: sio.c,v 1.75 1995/03/28 11:13:44 ache Exp $
* $Id: sio.c,v 1.76 1995/03/28 12:26:40 ache Exp $
*/
#include "sio.h"
@ -1100,6 +1100,21 @@ siointr1(com)
recv_data = 0;
else
recv_data = inb(com->data_port);
if (line_status & (LSR_PE|LSR_OE|LSR_FE|LSR_BI)) {
if (line_status & LSR_OE)
CE_RECORD(com, CE_OVERRUN);
/*
Don't store PE if IGNPAR and BI if IGNBRK,
this hack allows "raw" tty optimization
works even if IGN* is set.
Assume TTY_OE mapped to TTY_PE
*/
if ( (line_status & (LSR_PE|LSR_OE|LSR_FE))
&& (com->tp->t_iflag & IGNPAR)
|| (line_status & LSR_BI)
&& (com->tp->t_iflag & IGNBRK))
goto cont;
}
++com->bytes_in;
if (com->hotchar != 0 && recv_data == com->hotchar)
setsofttty();
@ -1121,29 +1136,15 @@ siointr1(com)
if (com->iptr - com->ibuf == 8)
setsofttty();
#endif
/*
Don't store PE if IGNPAR and BI if IGNBRK,
this hack allows "raw" tty optimization
works even if IGN* is set.
Assume TTY_OE mapped to TTY_PE
*/
if ( (!(line_status & (LSR_PE|LSR_OE|LSR_FE))
|| !(com->tp->t_iflag & IGNPAR))
&& (!(line_status & LSR_BI)
|| !(com->tp->t_iflag & IGNBRK))) {
ioptr[0] = recv_data;
ioptr[CE_INPUT_OFFSET] = line_status;
com->iptr = ++ioptr;
}
if (ioptr == com->ihighwater
&& com->state & CS_RTS_IFLOW)
outb(com->modem_ctl_port,
com->mcr_image &= ~MCR_RTS);
/* XXX - move this out of isr */
if (line_status & LSR_OE)
CE_RECORD(com, CE_OVERRUN);
}
cont:
/*
* "& 0x7F" is to avoid the gcc-1.40 generating a slow
* jump from the top of the loop to here
@ -1525,10 +1526,7 @@ siopoll()
}
if (com->state & CS_ODONE) {
comflush(com);
if (linesw[tp->t_line].l_start != ttstart)
(*linesw[tp->t_line].l_start)(tp);
else
comstart(tp);
}
if (incc <= 0 || !(tp->t_state & TS_ISOPEN))
continue;