PERFORCE change 94213 for review
Marcel Moolenaar
marcel at FreeBSD.org
Tue Mar 28 22:00:52 UTC 2006
http://perforce.freebsd.org/chv.cgi?CH=94213
Change 94213 by marcel at marcel_nfs on 2006/03/28 22:00:49
Perform a reset external/status interrupt before reading RR0.
Any status that triggers XSI will be latched and we may not
read the current status for them.
Affected files ...
.. //depot/projects/uart/dev/scc/scc_dev_z8530.c#6 edit
Differences ...
==== //depot/projects/uart/dev/scc/scc_dev_z8530.c#6 (text+ko) ====
@@ -114,7 +114,7 @@
scc_getreg(bas, c + REG_DATA);
scc_barrier(bas);
}
- if (ch->ch_ipend & SER_INT_SIGCHG) {
+ if (ch->ch_ipend & (SER_INT_SIGCHG|SER_INT_BREAK)) {
scc_setreg(bas, c + REG_CTRL, CR_RSTXSI);
scc_barrier(bas);
}
@@ -156,7 +156,9 @@
if (ip & IP_TIB)
ch[1]->ch_ipend |= SER_INT_TXIDLE;
if (ip & IP_SIA) {
- bes = scc_getreg(bas, CHAN_A + RR_BES);
+ scc_setreg(bas, CHAN_A + REG_CTRL, CR_RSTXSI);
+ scc_barrier(bas);
+ bes = scc_getreg(bas, CHAN_A + REG_CTRL);
if (bes & BES_BRK)
ch[0]->ch_ipend |= SER_INT_BREAK;
sig = ch[0]->ch_hwsig;
@@ -172,7 +174,9 @@
ch[0]->ch_ipend |= SER_INT_OVERRUN;
}
if (ip & IP_SIB) {
- bes = scc_getreg(bas, CHAN_B + RR_BES);
+ scc_setreg(bas, CHAN_B + REG_CTRL, CR_RSTXSI);
+ scc_barrier(bas);
+ bes = scc_getreg(bas, CHAN_B + REG_CTRL);
if (bes & BES_BRK)
ch[1]->ch_ipend |= SER_INT_BREAK;
sig = ch[1]->ch_hwsig;
More information about the p4-projects
mailing list