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| Rev 4055 | Rev 4296 | ||
|---|---|---|---|
| Line 476... | Line 476... | ||
| 476 | /* |
476 | /* |
| 477 | * ASSERT(%tl == 1) |
477 | * ASSERT(%tl == 1) |
| 478 | */ |
478 | */ |
| 479 | rdpr %tl, %g3 |
479 | rdpr %tl, %g3 |
| 480 | cmp %g3, 1 |
480 | cmp %g3, 1 |
| 481 | be 1f |
481 | be %xcc, 1f |
| 482 | nop |
482 | nop |
| 483 | 0: ba 0b ! this is for debugging, if we ever get here |
483 | 0: ba 0b ! this is for debugging, if we ever get here |
| 484 | nop ! it will be easy to find |
484 | nop ! it will be easy to find |
| 485 | 485 | ||
| 486 | 1: |
486 | 1: |
| Line 497... | Line 497... | ||
| 497 | */ |
497 | */ |
| 498 | and %g3, TSTATE_CWP_MASK, %g4 |
498 | and %g3, TSTATE_CWP_MASK, %g4 |
| 499 | wrpr %g4, 0, %cwp ! resynchronize CWP |
499 | wrpr %g4, 0, %cwp ! resynchronize CWP |
| 500 | 500 | ||
| 501 | andcc %g3, TSTATE_PRIV_BIT, %g0 ! if this trap came from the privileged mode... |
501 | andcc %g3, TSTATE_PRIV_BIT, %g0 ! if this trap came from the privileged mode... |
| 502 | bnz 0f ! ...skip setting of kernel stack and primary context |
502 | bnz %xcc, 0f ! ...skip setting of kernel stack and primary context |
| 503 | nop |
503 | nop |
| 504 | 504 | ||
| 505 | .endif |
505 | .endif |
| 506 | /* |
506 | /* |
| 507 | * Normal window spills will go to the userspace window buffer. |
507 | * Normal window spills will go to the userspace window buffer. |
| Line 670... | Line 670... | ||
| 670 | and %g1, TSTATE_CWP_MASK, %l0 |
670 | and %g1, TSTATE_CWP_MASK, %l0 |
| 671 | inc %l0 |
671 | inc %l0 |
| 672 | and %l0, NWINDOWS - 1, %l0 ! %l0 mod NWINDOWS |
672 | and %l0, NWINDOWS - 1, %l0 ! %l0 mod NWINDOWS |
| 673 | rdpr %cwp, %l1 |
673 | rdpr %cwp, %l1 |
| 674 | cmp %l0, %l1 |
674 | cmp %l0, %l1 |
| 675 | bz 0f ! CWP is ok |
675 | bz %xcc, 0f ! CWP is ok |
| 676 | nop |
676 | nop |
| 677 | 677 | ||
| 678 | /* |
678 | /* |
| 679 | * Fix CWP. |
679 | * Fix CWP. |
| 680 | * In order to recapitulate, the input registers in the current |
680 | * In order to recapitulate, the input registers in the current |
| Line 710... | Line 710... | ||
| 710 | */ |
710 | */ |
| 711 | 0: |
711 | 0: |
| 712 | .if NOT(\is_syscall) |
712 | .if NOT(\is_syscall) |
| 713 | rdpr %tstate, %g1 |
713 | rdpr %tstate, %g1 |
| 714 | andcc %g1, TSTATE_PRIV_BIT, %g0 ! if we are not returning to userspace..., |
714 | andcc %g1, TSTATE_PRIV_BIT, %g0 ! if we are not returning to userspace..., |
| 715 | bnz 1f ! ...skip restoring userspace windows |
715 | bnz %xcc, 1f ! ...skip restoring userspace windows |
| 716 | nop |
716 | nop |
| 717 | .endif |
717 | .endif |
| 718 | 718 | ||
| 719 | /* |
719 | /* |
| 720 | * Spills and fills will be processed by the {spill,fill}_1_normal |
720 | * Spills and fills will be processed by the {spill,fill}_1_normal |
| Line 747... | Line 747... | ||
| 747 | * CWP is now in the window last saved in the userspace window buffer. |
747 | * CWP is now in the window last saved in the userspace window buffer. |
| 748 | * Fill all windows stored in the buffer. |
748 | * Fill all windows stored in the buffer. |
| 749 | */ |
749 | */ |
| 750 | clr %g4 |
750 | clr %g4 |
| 751 | 0: andcc %g7, UWB_ALIGNMENT - 1, %g0 ! alignment check |
751 | 0: andcc %g7, UWB_ALIGNMENT - 1, %g0 ! alignment check |
| 752 | bz 0f ! %g7 is UWB_ALIGNMENT-aligned, no more windows to refill |
752 | bz %xcc, 0f ! %g7 is UWB_ALIGNMENT-aligned, no more windows to refill |
| 753 | nop |
753 | nop |
| 754 | 754 | ||
| 755 | add %g7, -STACK_WINDOW_SAVE_AREA_SIZE, %g7 |
755 | add %g7, -STACK_WINDOW_SAVE_AREA_SIZE, %g7 |
| 756 | ldx [%g7 + L0_OFFSET], %l0 |
756 | ldx [%g7 + L0_OFFSET], %l0 |
| 757 | ldx [%g7 + L1_OFFSET], %l1 |
757 | ldx [%g7 + L1_OFFSET], %l1 |
| Line 783... | Line 783... | ||
| 783 | * OTHERWIN, CANRESTORE, CANSAVE and CLEANWIN. |
783 | * OTHERWIN, CANRESTORE, CANSAVE and CLEANWIN. |
| 784 | */ |
784 | */ |
| 785 | wrpr %g1, 0, %cwp |
785 | wrpr %g1, 0, %cwp |
| 786 | add %g4, %g2, %g2 |
786 | add %g4, %g2, %g2 |
| 787 | cmp %g2, NWINDOWS - 2 |
787 | cmp %g2, NWINDOWS - 2 |
| 788 | bg 2f ! fix the CANRESTORE=NWINDOWS-1 anomaly |
788 | bg %xcc, 2f ! fix the CANRESTORE=NWINDOWS-1 anomaly |
| 789 | mov NWINDOWS - 2, %g1 ! use dealy slot for both cases |
789 | mov NWINDOWS - 2, %g1 ! use dealy slot for both cases |
| 790 | sub %g1, %g2, %g1 |
790 | sub %g1, %g2, %g1 |
| 791 | 791 | ||
| 792 | wrpr %g0, 0, %otherwin |
792 | wrpr %g0, 0, %otherwin |
| 793 | wrpr %g1, 0, %cansave ! NWINDOWS - 2 - CANRESTORE |
793 | wrpr %g1, 0, %cansave ! NWINDOWS - 2 - CANRESTORE |