| 42,6 → 42,7 |
|---|
| #include <arch/mm/tlb.h> |
| #include <arch/mm/mmu.h> |
| #include <arch/mm/tte.h> |
| #include <arch/trap/regwin.h> |
| |
| #define TT_FAST_INSTRUCTION_ACCESS_MMU_MISS 0x64 |
| #define TT_FAST_DATA_ACCESS_MMU_MISS 0x68 |
| 50,10 → 51,11 |
|---|
| #define FAST_MMU_HANDLER_SIZE 128 |
| |
| #ifdef __ASM__ |
| |
| .macro FAST_INSTRUCTION_ACCESS_MMU_MISS_HANDLER |
| /* |
| * First, try to refill TLB from TSB. |
| */ |
| ! |
| ! First, try to refill TLB from TSB. |
| ! |
| ! TODO |
| |
| wrpr %g0, PSTATE_PRIV_BIT | PSTATE_AG_BIT, %pstate |
| 74,7 → 76,7 |
|---|
| * |
| * Note that branch-delay slots are used in order to save space. |
| */ |
| 0: |
| |
| mov VA_DMMU_TAG_ACCESS, %g1 |
| ldxa [%g1] ASI_DMMU, %g1 ! read the faulting Context and VPN |
| set TLB_TAG_ACCESS_CONTEXT_MASK, %g2 |
| 84,28 → 86,61 |
|---|
| bz 0f ! page address is zero |
| |
| or %g3, (TTE_CP|TTE_P|TTE_W), %g2 ! 8K pages are the default (encoded as 0) |
| set 1, %g3 |
| sllx %g3, TTE_V_SHIFT, %g3 |
| or %g2, %g3, %g2 |
| mov 1, %g3 |
| sllx %g3, TTE_V_SHIFT, %g3 |
| or %g2, %g3, %g2 |
| stxa %g2, [%g0] ASI_DTLB_DATA_IN_REG ! identity map the kernel page |
| retry |
| |
| /* |
| * Third, catch and handle special cases when the trap is caused by |
| * some register window trap handler. |
| * the userspace register window spill or fill handler. In case |
| * one of these two traps caused this trap, we just lower the trap |
| * level and service the DTLB miss. In the end, we restart |
| * the offending SAVE or RESTORE. |
| */ |
| 0: |
| ! TODO |
| HANDLE_MMU_TRAPS_FROM_SPILL_OR_FILL |
| |
| 0: |
| wrpr %g0, PSTATE_PRIV_BIT | PSTATE_AG_BIT, %pstate |
| PREEMPTIBLE_HANDLER fast_data_access_mmu_miss |
| .endm |
| |
| .macro FAST_DATA_ACCESS_PROTECTION_HANDLER |
| /* |
| * First, try to refill TLB from TSB. |
| */ |
| ! TODO |
| |
| /* |
| * The same special case as in FAST_DATA_ACCESS_MMU_MISS_HANDLER. |
| */ |
| HANDLE_MMU_TRAPS_FROM_SPILL_OR_FILL |
| |
| wrpr %g0, PSTATE_PRIV_BIT | PSTATE_AG_BIT, %pstate |
| PREEMPTIBLE_HANDLER fast_data_access_protection |
| .endm |
| |
| /* |
| * Macro used to lower TL when a MMU trap is caused by |
| * the userspace register window spill or fill handler. |
| */ |
| .macro HANDLE_MMU_TRAPS_FROM_SPILL_OR_FILL |
| rdpr %tl, %g1 |
| dec %g1 |
| brz %g1, 0f ! if TL was 1, skip |
| nop |
| wrpr %g1, 0, %tl ! TL-- |
| rdpr %tt, %g2 |
| cmp %g2, TT_SPILL_1_NORMAL |
| be 0f ! trap from spill_1_normal |
| cmp %g2, TT_FILL_1_NORMAL |
| be 0f ! trap from fill_1_normal |
| inc %g1 |
| wrpr %g1, 0, %tl ! another trap, TL++ |
| 0: |
| .endm |
| |
| #endif /* __ASM__ */ |
| |
| #endif |