28,8 → 28,6 |
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#include <arch/arch.h> |
#include <arch/stack.h> |
#include <arch/regdef.h> |
#include <arch/mm/mmu.h> |
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.text |
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229,83 → 227,3 |
nop |
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.macro WRITE_ALTERNATE_REGISTER reg, bit |
rdpr %pstate, %g1 ! save PSTATE.PEF |
wrpr %g0, (\bit | PSTATE_PRIV_BIT), %pstate |
mov %o0, \reg |
wrpr %g0, PSTATE_PRIV_BIT, %pstate |
retl |
wrpr %g1, 0, %pstate ! restore PSTATE.PEF |
.endm |
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.macro READ_ALTERNATE_REGISTER reg, bit |
rdpr %pstate, %g1 ! save PSTATE.PEF |
wrpr %g0, (\bit | PSTATE_PRIV_BIT), %pstate |
mov \reg, %o0 |
wrpr %g0, PSTATE_PRIV_BIT, %pstate |
retl |
wrpr %g1, 0, %pstate ! restore PSTATE.PEF |
.endm |
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.global write_to_ag_g6 |
write_to_ag_g6: |
WRITE_ALTERNATE_REGISTER %g6, PSTATE_AG_BIT |
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.global write_to_ag_g7 |
write_to_ag_g7: |
WRITE_ALTERNATE_REGISTER %g7, PSTATE_AG_BIT |
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.global write_to_ig_g6 |
write_to_ig_g6: |
WRITE_ALTERNATE_REGISTER %g6, PSTATE_IG_BIT |
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.global read_from_ag_g7 |
read_from_ag_g7: |
READ_ALTERNATE_REGISTER %g7, PSTATE_AG_BIT |
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/** Switch to userspace. |
* |
* %o0 Userspace entry address. |
* %o1 Userspace stack pointer address. |
* %o2 Userspace address of uarg structure. |
*/ |
.global switch_to_userspace |
switch_to_userspace: |
save %o1, -STACK_WINDOW_SAVE_AREA_SIZE, %sp |
flushw |
wrpr %g0, 0, %cleanwin ! avoid information leak |
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mov %i2, %o0 ! uarg |
xor %o1, %o1, %o1 ! %o1 is defined to hold pcb_ptr |
! set it to 0 |
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clr %i2 |
clr %i3 |
clr %i4 |
clr %i5 |
clr %i6 |
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wrpr %g0, 1, %tl ! enforce mapping via nucleus |
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rdpr %cwp, %g1 |
wrpr %g1, TSTATE_IE_BIT, %tstate |
wrpr %i0, 0, %tnpc |
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/* |
* Set primary context according to secondary context. |
* Secondary context has been already installed by |
* higher-level functions. |
*/ |
wr %g0, ASI_DMMU, %asi |
ldxa [VA_SECONDARY_CONTEXT_REG] %asi, %g1 |
stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi |
flush %i7 |
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/* |
* Spills and fills will be handled by the userspace handlers. |
*/ |
wrpr %g0, WSTATE_OTHER(0) | WSTATE_NORMAL(1), %wstate |
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done ! jump to userspace |
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