CVS commit: src/sys/arch/alpha

["Jason R Thorpe" <thorpej%netbsd.org@localhost>]

Module Name:    src
Committed By:   thorpej
Date:           Tue Apr 20 00:09:45 UTC 2021

Modified Files:
        src/sys/arch/alpha/alpha: interrupt.c
        src/sys/arch/alpha/include: cpu.h

Log Message:
Slight tweak to previous changes:

Rather than simply increment the interrupt depth for the clock interrupt,
we add 0x10.  Why?  Because while we only use a single Alpha IPL (4) for
IPL_{BIO,NET,TTY,VM}, technically the architecture specification suports
two in the OSF/1 PALcode (3 [low-pri] and 4 [high-pri]), meaning we could
conceiveably have intrdepth > 1 just for device interrupts.

Adding 0x10 here means that cpu_intr_p() can check for "intrdepth != 0" for
"in interrupt context" and CLKF_INTR() can check "(intrdepth & 0xf) != 0" for
"was processing interrupts when the clock interrupt happened".


To generate a diff of this commit:
cvs rdiff -u -r1.93 -r1.94 src/sys/arch/alpha/alpha/interrupt.c
cvs rdiff -u -r1.100 -r1.101 src/sys/arch/alpha/include/cpu.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.