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pseg_get tells us whether it really needed that spare page after all.

This commit is contained in:
eeh 2000-12-29 18:32:47 +00:00
parent fcae6c100a
commit e8b285df6a
1 changed files with 7 additions and 8 deletions
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15
sys/arch/sparc64/sparc64/locore.s
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@ -1,4 +1,4 @@
/* $NetBSD: locore.s,v 1.107 2000/12/07 00:59:42 eeh Exp $ */
/* $NetBSD: locore.s,v 1.108 2000/12/29 18:32:47 eeh Exp $ */
/*
* Copyright (c) 1996-2000 Eduardo Horvath
* Copyright (c) 1996 Paul Kranenburg
@ -7757,8 +7757,7 @@ idle:
ld [%l2 + %lo(_C_LABEL(sched_whichqs))], %o3
brnz,pt %o3, notidle ! Something to run
nop
#if 1
#ifdef UVM_PAGE_IDLE_ZERO
! Check uvm.page_idle_zero
sethi %hi(_C_LABEL(uvm) + UVM_PAGE_IDLE_ZERO), %o3
ld [%o3 + %lo(_C_LABEL(uvm) + UVM_PAGE_IDLE_ZERO)], %o3
@ -8082,8 +8081,7 @@ Lsw_load:
2:
#endif
ldx [%l1 + PCB_SP], %i6
! call _C_LABEL(blast_vcache) ! Clear out I$ and D$
ldx [%l1 + PCB_PC], %i7
ldx [%l1 + PCB_PC], %i7
wrpr %g0, 0, %otherwin ! These two insns should be redundant
wrpr %g0, 0, %canrestore
rdpr %ver, %l7
@ -8307,7 +8305,6 @@ ENTRY(snapshot)
* to user mode. This happens in two known cases: after execve(2) of init,
* and when returning a child to user mode after a fork(2).
*/
nop; nop ! Make sure we don't get lost getting here.
ENTRY(proc_trampoline)
#ifdef SCHED_DEBUG
nop; nop; nop; nop ! Try to make sure we don't vector into the wrong instr
@ -9422,7 +9419,8 @@ ENTRY(pseg_get)
* paddr_t spare %o3);
*
* Set a pseg entry to a particular TTE value. Returns 0 on success,
* 1 if it needs to fill a pseg, and -1 if the address is in the virtual hole.
* 1 if it needs to fill a pseg, 2 if it succeeded but didn't need the
* spare page, and -1 if the address is in the virtual hole.
* (NB: nobody in pmap checks for the virtual hole, so the system will hang.)
* Allocate a page, pass the phys addr in as the spare, and try again.
* If spare is not NULL it is assumed to be the address of a zeroed physical
@ -9530,8 +9528,9 @@ ENTRY(pseg_set)
tne 1
mov %o4, %o7
#endif
mov 2, %o0 ! spare unused?
retl
clr %o0
movrz %o3, %g0, %o0 ! No. return 0
1:
retl
mov 1, %o0