| 28,8 → 28,6 |
|---|
| |
| #include <arch/arch.h> |
| #include <arch/stack.h> |
| #include <arch/regdef.h> |
| #include <arch/mm/mmu.h> |
| |
| .text |
| |
| 229,83 → 227,3 |
|---|
| nop |
| |
| |
| .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 |
| |
| .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 |
| |
| .global write_to_ag_g6 |
| write_to_ag_g6: |
| WRITE_ALTERNATE_REGISTER %g6, PSTATE_AG_BIT |
| |
| .global write_to_ag_g7 |
| write_to_ag_g7: |
| WRITE_ALTERNATE_REGISTER %g7, PSTATE_AG_BIT |
| |
| .global write_to_ig_g6 |
| write_to_ig_g6: |
| WRITE_ALTERNATE_REGISTER %g6, PSTATE_IG_BIT |
| |
| .global read_from_ag_g7 |
| read_from_ag_g7: |
| READ_ALTERNATE_REGISTER %g7, PSTATE_AG_BIT |
| |
| |
| /** 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 |
| |
| mov %i2, %o0 ! uarg |
| xor %o1, %o1, %o1 ! %o1 is defined to hold pcb_ptr |
| ! set it to 0 |
| |
| clr %i2 |
| clr %i3 |
| clr %i4 |
| clr %i5 |
| clr %i6 |
| |
| wrpr %g0, 1, %tl ! enforce mapping via nucleus |
| |
| rdpr %cwp, %g1 |
| wrpr %g1, TSTATE_IE_BIT, %tstate |
| wrpr %i0, 0, %tnpc |
| |
| /* |
| * 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 |
| |
| /* |
| * Spills and fills will be handled by the userspace handlers. |
| */ |
| wrpr %g0, WSTATE_OTHER(0) | WSTATE_NORMAL(1), %wstate |
| |
| done ! jump to userspace |
| |