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Disable interrupts when calling openfirmware.

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This commit is contained in:
Jake Burkholder 2001-08-21 00:00:18 +00:00
parent 0839a4e34b
commit 8d5e3be7a4
2 changed files with 26 additions and 14 deletions
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20
sys/sparc64/sparc64/support.S
View File

@ -346,11 +346,17 @@ END(ofwstack)
* void openfirmware(cell_t args[])
*/
ENTRY(openfirmware)
save
setx ofwstack_last - SPOFF, %l0, %l1
mov %l1, %sp /* XXX race between save and %sp setup */
/*
* Disable interrupts. The firmware should not deal with our interrupts
* anyway, and the temporary stack is not large enough to hold the stack
* footprint of the interrrupt handling.
*/
rdpr %pstate, %o3
andn %o3, PSTATE_IE, %o1
wrpr %o1, 0, %pstate
setx ofwstack_last - SPOFF, %o1, %o2
save %o2, 0, %sp
flushw
rdpr %pstate, %l0
rdpr %tl, %l1
rdpr %tba, %l2
mov AA_DMMU_PCXR, %l3
@ -368,13 +374,13 @@ ENTRY(openfirmware)
wrpr %g0, 0, %tl
call %l6
mov %i0, %o0
wrpr %l0, 0, %pstate
wrpr %l1, 0, %tl
wrpr %l2, 0, %tba
stxa %l4, [%l3] ASI_DMMU
wrpr %l7, 0, %pil
membar #Sync
flush %sp
ret
restore
restore
retl
wrpr %o3, 0, %pstate
END(openfirmware)

20
sys/sparc64/sparc64/support.s
View File

@ -346,11 +346,17 @@ END(ofwstack)
* void openfirmware(cell_t args[])
*/
ENTRY(openfirmware)
save
setx ofwstack_last - SPOFF, %l0, %l1
mov %l1, %sp /* XXX race between save and %sp setup */
/*
* Disable interrupts. The firmware should not deal with our interrupts
* anyway, and the temporary stack is not large enough to hold the stack
* footprint of the interrrupt handling.
*/
rdpr %pstate, %o3
andn %o3, PSTATE_IE, %o1
wrpr %o1, 0, %pstate
setx ofwstack_last - SPOFF, %o1, %o2
save %o2, 0, %sp
flushw
rdpr %pstate, %l0
rdpr %tl, %l1
rdpr %tba, %l2
mov AA_DMMU_PCXR, %l3
@ -368,13 +374,13 @@ ENTRY(openfirmware)
wrpr %g0, 0, %tl
call %l6
mov %i0, %o0
wrpr %l0, 0, %pstate
wrpr %l1, 0, %tl
wrpr %l2, 0, %tba
stxa %l4, [%l3] ASI_DMMU
wrpr %l7, 0, %pil
membar #Sync
flush %sp
ret
restore
restore
retl
wrpr %o3, 0, %pstate
END(openfirmware)