Searched hist:85029 (Results 1 - 2 of 2) sorted by relevance
| /freebsd-11-stable/sys/i386/isa/ | ||
| H A D | npx.c | diff 85029 Tue Oct 16 12:12:35 MDT 2001 bde Deleted most of npxprobe(), and merged npxprobe1() back into npxprobe(). Use the normal interrupt handler (npx_intr()) instead of a special probe-time interrupt handler, although this causes problems due to the bus_teardown_intr() not actually even tearing down the interrupt (these problems were avoided by doing interrupt attachment for the special interrupt handler directly). Fixed minor bitrot in comments. The reason for the npxprobe()/npxprobe1() split mostly went away at about the same time it was made (in 1992 or 1993 just before the beginning of history). 386BSD ran all probes with interrupts completely masked, and I didn't want to disturb this when I added an irq probe to npxprobe(). An irq (not necessarily npx) must be acked for at least external npx's to take the cpu out of the wait state that it enters when an npx error occurs, so the probe must be done with a suitable irq unmasked. npxprobe() went to great lengths to unmask precisely the npx irq. Running probes with all interrupts masked was never really needed in FreeBSD, since FreeBSD always masked interrupts well enough using splhigh(), but it wasn't until rev.1.48 (1995/12/12) of autoconf.c that all probes were run with CPU interrupts enabled. This permits npxprobe() to probe its irq using normal interrupt resources. Note that most drivers still can't depend on this. It depends on the interrupt handler being fast and the irq not being shared. |
| /freebsd-11-stable/sys/amd64/amd64/ | ||
| H A D | fpu.c | diff 85029 Tue Oct 16 12:12:35 MDT 2001 bde Deleted most of npxprobe(), and merged npxprobe1() back into npxprobe(). Use the normal interrupt handler (npx_intr()) instead of a special probe-time interrupt handler, although this causes problems due to the bus_teardown_intr() not actually even tearing down the interrupt (these problems were avoided by doing interrupt attachment for the special interrupt handler directly). Fixed minor bitrot in comments. The reason for the npxprobe()/npxprobe1() split mostly went away at about the same time it was made (in 1992 or 1993 just before the beginning of history). 386BSD ran all probes with interrupts completely masked, and I didn't want to disturb this when I added an irq probe to npxprobe(). An irq (not necessarily npx) must be acked for at least external npx's to take the cpu out of the wait state that it enters when an npx error occurs, so the probe must be done with a suitable irq unmasked. npxprobe() went to great lengths to unmask precisely the npx irq. Running probes with all interrupts masked was never really needed in FreeBSD, since FreeBSD always masked interrupts well enough using splhigh(), but it wasn't until rev.1.48 (1995/12/12) of autoconf.c that all probes were run with CPU interrupts enabled. This permits npxprobe() to probe its irq using normal interrupt resources. Note that most drivers still can't depend on this. It depends on the interrupt handler being fast and the irq not being shared. |
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