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Save the primary mmu context around calls to the prom, and install

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nucleus context.  The prom runs at trap level 0, so there's no
implicit nucleus context and we have to force it.
This commit is contained in:
Jake Burkholder 2001-08-06 02:29:13 +00:00
parent cfe8998cd6
commit 04a8a9ba95
2 changed files with 28 additions and 12 deletions
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20
sys/sparc64/sparc64/support.S
View file

@ -330,17 +330,25 @@ ENTRY(openfirmware)
rdpr %pstate, %l0
rdpr %tl, %l1
rdpr %tba, %l2
mov AA_DMMU_PCXR, %l3
ldxa [%l3] ASI_DMMU, %l4
stxa %g0, [%l3] ASI_DMMU
membar #Sync
flush %sp
setx ofw_tba, %l7, %l5
ldx [%l5], %l5
setx ofw_vec, %l7, %l6
ldx [%l6], %l6
wrpr %l5, 0, %tba
wrpr %g0, 0, %tl
setx ofw_tba, %l4, %l3
ldx [%l3], %l3
setx ofw_vec, %l5, %l4
ldx [%l4], %l4
wrpr %l3, 0, %tba
call %l4
call %l6
mov %i0, %o0
wrpr %l0, 0, %pstate
wrpr %l1, 0, %tl
wrpr %l2, 0, %tba
stxa %l4, [%l3] ASI_DMMU
membar #Sync
flush %sp
ret
restore
END(openfirmware)

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

@ -330,17 +330,25 @@ ENTRY(openfirmware)
rdpr %pstate, %l0
rdpr %tl, %l1
rdpr %tba, %l2
mov AA_DMMU_PCXR, %l3
ldxa [%l3] ASI_DMMU, %l4
stxa %g0, [%l3] ASI_DMMU
membar #Sync
flush %sp
setx ofw_tba, %l7, %l5
ldx [%l5], %l5
setx ofw_vec, %l7, %l6
ldx [%l6], %l6
wrpr %l5, 0, %tba
wrpr %g0, 0, %tl
setx ofw_tba, %l4, %l3
ldx [%l3], %l3
setx ofw_vec, %l5, %l4
ldx [%l4], %l4
wrpr %l3, 0, %tba
call %l4
call %l6
mov %i0, %o0
wrpr %l0, 0, %pstate
wrpr %l1, 0, %tl
wrpr %l2, 0, %tba
stxa %l4, [%l3] ASI_DMMU
membar #Sync
flush %sp
ret
restore
END(openfirmware)