Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fix the idle loop.

Browse Source
This commit is contained in:
matt 2000-08-26 15:13:23 +00:00
parent 3403ff66ff
commit 5c62e0cab4
1 changed files with 10 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
sys/arch/vax/vax/subr.s
View File

@ -1,4 +1,4 @@
/* $NetBSD: subr.s,v 1.53 2000/08/26 03:38:46 matt Exp $ */
/* $NetBSD: subr.s,v 1.54 2000/08/26 15:13:23 matt Exp $ */
/*
* Copyright (c) 1994 Ludd, University of Lule}, Sweden.
@ -306,7 +306,13 @@ remrq: .asciz "remrunqueue"
# Idle loop. Here we could do something fun, maybe, like calculating
# pi or something.
#
idle: mtpr $IPL_NONE,$PR_IPL # Enable all types of interrupts
idle:
#if defined(LOCKDEBUG)
calls $0,_C_LABEL(sched_unlock_idle)
#elif defined(MULTIPROCESSOR)
clrl _C_LABEL(sched_lock) # release sched lock
#endif
mtpr $IPL_NONE,$PR_IPL # Enable all types of interrupts
1:
#if 0
tstl _C_LABEL(uvm)+UVM_PAGE_IDLE_ZERO
@ -324,22 +330,17 @@ idle: mtpr $IPL_NONE,$PR_IPL # Enable all types of interrupts
#endif
tstl _C_LABEL(sched_whichqs) # Anything ready to run?
bneq Swtch # Yes, goto switch again.
#if defined(LOCKDEBUG)
calls $0,_C_LABEL(sched_unlock_idle)
#elif defined(MULTIPROCESSOR)
clrl _C_LABEL(sched_lock) # release sched lock
#endif
brb idle # nope, continue to idlely loop
#
# cpu_switch, cpu_exit and the idle loop implemented in assembler
# for efficiency. r0 contains pointer to last process.
# for efficiency. r0 contains pointer to last process. This is
# called at IPL_HIGH.
#
JSBENTRY(Swtch)
mfpr $PR_SSP,r1 # Get ptr to this cpu_info struct
clrl CI_CURPROC(r1) # Stop process accounting
mtpr $IPL_HIGH,$PR_IPL # block all interrupts
ffs $0,$32,_C_LABEL(sched_whichqs),r3 # Search for bit set
beql idle # no bit set, go to idle loop