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Line 216... Line 216...
216 
.org trap_table + TT_SPILL_2_NORMAL*ENTRY_SIZE
 216 
.org trap_table + TT_SPILL_2_NORMAL*ENTRY_SIZE
217 
.global spill_2_normal
 217 
.global spill_2_normal
218 
spill_2_normal:
 218 
spill_2_normal:
219 
	SPILL_TO_USPACE_WINDOW_BUFFER
 219 
	SPILL_TO_USPACE_WINDOW_BUFFER
220 
 
 220 
 
- 
 
 221 
/* TT = 0xa0, TL = 0, spill_0_other handler */
- 
 
 222 
.org trap_table + TT_SPILL_0_OTHER*ENTRY_SIZE
- 
 
 223 
.global spill_0_other
- 
 
 224 
spill_0_other:
- 
 
 225 
	SPILL_TO_USPACE_WINDOW_BUFFER
- 
 
 226 
 
221 
/* TT = 0xc0, TL = 0, fill_0_normal handler */
 227 
/* TT = 0xc0, TL = 0, fill_0_normal handler */
222 
.org trap_table + TT_FILL_0_NORMAL*ENTRY_SIZE
 228 
.org trap_table + TT_FILL_0_NORMAL*ENTRY_SIZE
223 
.global fill_0_normal
 229 
.global fill_0_normal
224 
fill_0_normal:
 230 
fill_0_normal:
225 
	FILL_NORMAL_HANDLER_KERNEL
 231 
	FILL_NORMAL_HANDLER_KERNEL
Line 545... Line 551...
545 
	mov %i2, %o4
 551 
	mov %i2, %o4
546 
	mov %i3, %o5
 552 
	mov %i3, %o5
547 
.endif
 553 
.endif
548 
 
 554 
 
549 
	/*
 555 
	/*
550 
	 * Mark the CANSAVE windows as OTHER windows.
 556 
	 * Mark the CANRESTORE windows as OTHER windows.
551 
	 * Set CLEANWIN to NWINDOW-1 so that clean_window traps do not occur.
 557 
	 * Set CLEANWIN to NWINDOW-1 so that clean_window traps do not occur.
552 
	 */
 558 
	 */
553 
	rdpr %cansave, %l0
 559 
	rdpr %canrestore, %l0
554 
	wrpr %l0, %otherwin
 560 
	wrpr %l0, %otherwin
555 
	wrpr %g0, %cansave
 561 
	wrpr %g0, %canrestore
556 
	wrpr %g0, NWINDOW - 1, %cleanwin
 562 
	wrpr %g0, NWINDOW - 1, %cleanwin
557 
 
 563 
 
558 
	/*
 564 
	/*
559 
	 * Switch to primary context 0.
 565 
	 * Switch to primary context 0.
560 
	 */
 566 
	 */
Line 639... Line 645...
639 
	wrpr %g2, 0, %tpc
 645 
	wrpr %g2, 0, %tpc
640 
	wrpr %g3, 0, %tnpc
 646 
	wrpr %g3, 0, %tnpc
641 
 
 647 
 
642 
	/*
 648 
	/*
643 
	 * If OTHERWIN is zero, then all the userspace windows have been
 649 
	 * If OTHERWIN is zero, then all the userspace windows have been
644 
	 * spilled to kernel memory (i.e. register window buffer). If
 650 
	 * spilled to kernel memory (i.e. register window buffer). Moreover,
- 
 
 651 
	 * if the scheduler was called in the meantime, all valid windows
- 
 
 652 
	 * belonging to other threads were spilled by context_restore().
645 
	 * OTHERWIN is non-zero, then some userspace windows are still
 653 
	 * If OTHERWIN is non-zero, then some userspace windows are still
646 
	 * valid. Others might have been spilled. However, the CWP pointer
 654 
	 * valid. Others might have been spilled. However, the CWP pointer
647 
	 * needs no fixing because the scheduler had not been called.
 655 
	 * needs no fixing because the scheduler had not been called.
648 
	 */
 656 
	 */
649 
	rdpr %otherwin, %l0
 657 
	rdpr %otherwin, %l0
650 
	brnz %l0, 0f
 658 
	brnz %l0, 0f
Line 657... Line 665...
657 
	/*
 665 
	/*
658 
	 * If TSTATE.CWP + 1 == CWP, then we still do not have to fix CWP.
 666 
	 * If TSTATE.CWP + 1 == CWP, then we still do not have to fix CWP.
659 
	 */
 667 
	 */
660 
	and %g1, TSTATE_CWP_MASK, %l0
 668 
	and %g1, TSTATE_CWP_MASK, %l0
661 
	inc %l0
 669 
	inc %l0
662 
	and %l0, TSTATE_CWP_MASK, %l0	! %l0 mod NWINDOW
 670 
	and %l0, NWINDOW - 1, %l0	! %l0 mod NWINDOW
663 
	rdpr %cwp, %l1
 671 
	rdpr %cwp, %l1
664 
	cmp %l0, %l1
 672 
	cmp %l0, %l1
665 
	bz 0f				! CWP is ok
 673 
	bz 0f				! CWP is ok
666 
	nop
 674 
	nop
667 
 
 675 
 
668 
	/*
 676 
	/*
669 
	 * Fix CWP.
 677 
	 * Fix CWP.
670 
	 * Just for reminder, the input registers in the current window
 678 
	 * In order to recapitulate, the input registers in the current
671 
	 * are the output registers of the window to which we want to
 679 
	 * window are the output registers of the window to which we want
672 
	 * restore. Because the fill trap fills only input and local
 680 
	 * to restore. Because the fill trap fills only input and local
673 
	 * registers of a window, we need to preserve those output
 681 
	 * registers of a window, we need to preserve those output
674 
	 * registers manually.
 682 
	 * registers manually.
675 
	 */
 683 
	 */
676 
	flushw
 - 
 
677 
	mov %sp, %g2
 684 
	mov %sp, %g2
678 
	stx %i0, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I0]
 685 
	stx %i0, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I0]
679 
	stx %i1, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I1]
 686 
	stx %i1, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I1]
680 
	stx %i2, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I2]
 687 
	stx %i2, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I2]
681 
	stx %i3, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I3]
 688 
	stx %i3, [%sp + PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE + STACK_BIAS + SAVED_I3]
Line 736... Line 743...
736 
	/*
 743 
	/*
737 
	 * CWP is now in the window last saved in the userspace window buffer.
 744 
	 * CWP is now in the window last saved in the userspace window buffer.
738 
	 * Fill all windows stored in the buffer.
 745 
	 * Fill all windows stored in the buffer.
739 
	 */
 746 
	 */
740 
	clr %g4
 747 
	clr %g4
- 
 
 748 
	set PAGE_SIZE - 1, %g5
741 
0:	andcc %g7, PAGE_WIDTH - 1, %g0		! PAGE_SIZE alignment check
 749 
0:	andcc %g7, %g5, %g0			! PAGE_SIZE alignment check
742 
	bz 0f					! %g7 is page-aligned, no more windows to refill
 750 
	bz 0f					! %g7 is page-aligned, no more windows to refill
743 
	nop
 751 
	nop
744 
 
 752 
 
745 
	add %g7, -STACK_WINDOW_SAVE_AREA_SIZE, %g7
 753 
	add %g7, -STACK_WINDOW_SAVE_AREA_SIZE, %g7
746 
	ldx [%g7 + L0_OFFSET], %l0
 754 
	ldx [%g7 + L0_OFFSET], %l0