Changeset 382fb4ba in mainline for kernel/arch/sparc32/src/trap_table.S
- Timestamp:
- 2013-12-10T22:33:33Z (12 years ago)
- Branches:
- lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
- Children:
- f7a33de
- Parents:
- 2955bb9
- File:
-
- 1 edited
-
kernel/arch/sparc32/src/trap_table.S (modified) (7 diffs)
Legend:
- Unmodified
- Added
- Removed
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kernel/arch/sparc32/src/trap_table.S
r2955bb9 r382fb4ba 279 279 restore 280 280 mov %g5, %wim 281 282 /* Check beginning of %sp */ 281 283 and %g4, 0xfffff000, %l4 284 lda [%l4] 0x18, %l4 285 cmp %l4, 0 286 bne 1f 287 nop 288 289 /* prepare args for preemptible handler */ 290 mov %g4, %o0 291 set preemptible_save_uspace, %o2 292 b preemptible_trap 293 nop 294 295 /* Check end of %sp */ 296 add %g4, 56, %g4 297 and %l4, 0xfffff000, %l4 282 298 lda [%l4] 0x18, %l4 283 299 cmp %l4, 0 … … 532 548 nop 533 549 550 /* Get UWB address */ 551 // switch_to_invalid %g5, %g6 552 // mov %l6, %g1 553 // switch_back %g5, %g6 554 555 # /* Flush windows to stack */ 556 call flush_windows 557 nop 558 /* 559 get_wim_number %g2 560 get_cwp %g5 561 mov %psr, %g6 562 563 sub %g2, 1, %g4 564 and %g4, 0x7, %g4 565 0: mov %g0, %wim 566 cmp %g5, %g4 567 be 0f 568 nop 569 570 restore 571 add %g1, 64, %g1 572 std %l0, [%g1 + 0] 573 std %l2, [%g1 + 8] 574 std %l4, [%g1 + 16] 575 std %l6, [%g1 + 24] 576 std %i0, [%g1 + 32] 577 std %l2, [%g1 + 40] 578 std %l4, [%g1 + 48] 579 std %l6, [%g1 + 56] 580 inc %g5 581 and %g5, 0x7, %g5 582 ba 0b 583 nop 584 585 0: inc %g4 586 and %g4, 0x7, %g4 587 clr %g5 588 inc %g5 589 sll %g5, %g4, %g5 590 591 * Write values to invalid window and switch back * 592 mov %g7, %l5 593 mov %g1, %l6 594 clr %l7 595 switch_back %g5, %g6 596 */ 597 534 598 /* Jump to actual subroutine */ 535 599 call %o2 … … 548 612 549 613 /* If trap originated from uspace, clear uspace window mark and save uwb address for future use */ 550 if_from_kernel 6f614 if_from_kernel 9f 551 615 switch_to_invalid %g5, %g6 552 616 clr %l7 … … 594 658 switch_back %g5, %g6 595 659 596 /* If next window is invalid, do inline restore */ 597 6: get_wim_number %g6 598 get_cwp %g7 599 inc %g7 600 and %g7, 0x7, %g7 601 cmp %g6, %g7 602 bne 8f 603 604 if_from_kernel 7f 605 606 inline_restore_uspace %g1 607 switch_to_invalid %g5, %g6 608 mov %g1, %l6 609 switch_back %g5, %g6 610 b 8f 611 nop 612 613 7: inline_restore_kernel 614 615 8: ld [%sp + 104], %g1 660 mov %sp, %l3 661 sub %g2, 128, %sp 662 ld [%sp + 104], %g1 616 663 ld [%sp + 108], %g2 617 664 ld [%sp + 112], %g3 618 665 ld [%sp + 116], %g4 619 666 ld [%sp + 120], %g7 620 jmp %l1 667 mov %l3, %sp 668 b 10f 669 nop 670 671 9: ld [%sp + 104], %g1 672 ld [%sp + 108], %g2 673 ld [%sp + 112], %g3 674 ld [%sp + 116], %g4 675 ld [%sp + 120], %g7 676 677 10: jmp %l1 621 678 rett %l2 622 679 623 680 interrupt_trap: 624 mov %psr, %l0625 626 /* Check whether previous mode was usermode */627 and %l0, (1 << 6), %l0628 cmp %l0, 0629 bne 1f630 nop631 632 /* Set up stack */633 set kernel_sp, %l4634 ld [%l4], %sp635 mov %sp, %fp636 1: sub %sp, 112, %sp637 638 /* Save trap data on stack */639 mov %psr, %l0640 st %l1, [%fp - 4]641 st %l2, [%fp - 8]642 st %l0, [%fp - 12]643 644 /* Enable traps */645 mov %psr, %l0646 or %l0, (1 << 5), %l0647 mov %l0, %psr648 nop649 nop650 nop651 nop652 653 /* Jump to actual subroutine */654 mov %g2, %o0655 call exc_dispatch656 sub %fp, 12, %o1657 658 /* Return from handler */659 ld [%fp - 4], %l1660 ld [%fp - 8], %l2661 ld [%fp - 12], %l0662 mov %l0, %psr663 nop664 nop665 nop666 nop667 nop668 669 /* If trap originated from uspace, clear uspace window mark and save uwb address for future use */670 if_from_kernel 6f671 switch_to_invalid %g5, %g6672 clr %l7673 mov %l6, %g7674 switch_back %g5, %g6675 mov %g7, %g1676 677 /* If next window is invalid, do inline restore */678 6: get_wim_number %g6679 get_cwp %g7680 inc %g7681 cmp %g6, %g7682 bne 8f683 684 if_from_kernel 7f685 686 inline_restore_uspace %g1687 switch_to_invalid %g5, %g6688 mov %g1, %l6689 switch_back %g5, %g6690 b 8f691 nop692 693 7: inline_restore_kernel694 695 8: jmp %l1696 rett %l2697 698 syscall_trap:699 681 /* Save %g7 */ 700 682 mov %g7, %l0 … … 766 748 nop 767 749 750 /* Flush windows to stack */ 751 call flush_windows 752 nop 753 768 754 /* Jump to actual subroutine */ 769 sub %o0, 0x80, %o0 770 st %o0, [ %sp + 92 ] 771 mov %i0, %o0 772 mov %i1, %o1 773 mov %i2, %o2 774 mov %i3, %o3 775 mov %i4, %o4 776 call syscall 777 mov %i5, %o5 755 mov %g2, %o0 756 call exc_dispatch 757 add %sp, 128, %o1 778 758 779 759 /* Return from handler */ … … 781 761 ld [%sp + 96], %l2 782 762 ld [%sp + 100], %l0 783 mov %o0, %i0784 mov %psr, %l1785 and %l1, 0xf, %l1786 and %l0, 0xfffffff0, %l0787 or %l0, %l1, %l0788 763 mov %l0, %psr 789 764 nop … … 864 839 ld [%sp + 116], %g4 865 840 ld [%sp + 120], %g7 841 jmp %l1 842 rett %l2 843 844 845 syscall_trap: 846 /* Save %g7 */ 847 mov %g7, %l0 848 849 /* Check whether we landed in invalid window */ 850 get_wim_number %g6 851 get_cwp %g7 852 cmp %g6, %g7 853 bne 4f 854 nop 855 856 /* We are in invalid window. Check whether previous mode was usermode */ 857 if_from_kernel 3f 858 859 /* Trap originated from uspace */ 860 /* Kernel stack pointer is at %l5, uwb is at %l6 */ 861 inline_save_uspace %l6 862 863 /* set uspace window mark */ 864 mov %psr, %l7 865 inc %l7 866 and %l7, 0x7, %l7 867 or %l7, 0x10, %l7 868 b 4f 869 nop 870 871 3: /* Trap originated from kernel */ 872 inline_save_kernel 873 874 4: /* Check whether previous mode was usermode */ 875 if_from_kernel 5f 876 877 /* Load kernel stack pointer from invalid window */ 878 switch_to_invalid %g5, %g6 879 880 /* set uspace window mark */ 881 mov %g6, %l7 882 inc %l7 883 and %l7, 0x7, %l7 884 or %l7, 0x10, %l7 885 886 /* Save stack pointer */ 887 mov %l5, %g7 888 switch_back %g5, %g6 889 mov %g7, %sp 890 // mov %sp, %fp 891 892 5: /* Set up stack frame */ 893 sub %sp, 128, %sp 894 895 /* Save trap data on stack */ 896 mov %psr, %l5 897 st %l1, [%sp + 92] 898 st %l2, [%sp + 96] 899 st %l5, [%sp + 100] 900 st %g1, [%sp + 104] 901 st %g2, [%sp + 108] 902 st %g3, [%sp + 112] 903 st %g4, [%sp + 116] 904 st %l0, [%sp + 120] 905 906 /* Enable traps */ 907 mov %psr, %l0 908 or %l0, (1 << 5), %l0 909 mov %l0, %psr 910 nop 911 nop 912 nop 913 nop 914 915 /* Flush windows */ 916 call flush_windows 917 nop 918 919 /* Jump to actual subroutine */ 920 sub %o0, 0x80, %o0 921 st %o0, [ %sp + 92 ] 922 mov %i0, %o0 923 mov %i1, %o1 924 mov %i2, %o2 925 mov %i3, %o3 926 mov %i4, %o4 927 call syscall 928 mov %i5, %o5 929 930 /* Return from handler */ 931 ld [%sp + 92], %l1 932 ld [%sp + 96], %l2 933 ld [%sp + 100], %l0 934 mov %o0, %i0 935 mov %psr, %l1 936 and %l1, 0xf, %l1 937 and %l0, 0xfffffff0, %l0 938 or %l0, %l1, %l0 939 mov %l0, %psr 940 nop 941 nop 942 nop 943 nop 944 nop 945 946 /* If trap originated from uspace, clear uspace window mark and save uwb address for future use */ 947 if_from_kernel 8f 948 switch_to_invalid %g5, %g6 949 mov %l5, %g2 950 mov %l6, %g1 951 mov %l7, %g7 952 switch_back %g5, %g6 953 954 /* If trap originated from uspace, restore all windows from UWB */ 955 /* UWB pointer is at %g1 */ 956 0: mov %g0, %wim 957 clr %g5 958 andcc %g1, UWB_ALIGNMENT - 1, %g0 959 bz 0f 960 nop 961 962 restore 963 sub %g1, 64, %g1 964 ldd [%g1 + 0], %l0 965 ldd [%g1 + 8], %l2 966 ldd [%g1 + 16], %l4 967 ldd [%g1 + 24], %l6 968 ldd [%g1 + 32], %i0 969 ldd [%g1 + 40], %i2 970 ldd [%g1 + 48], %i4 971 ldd [%g1 + 56], %i6 972 inc %g5 973 and %g5, 0x7, %g5 974 ba 0b 975 nop 976 977 /* We've restored all uspace windows. Now time to 978 * fix CWP and WIM 979 */ 980 0: restore 981 get_cwp %g7 982 clr %g5 983 inc %g5 984 sll %g5, %g7, %g5 985 986 /* Write values to invalid window and switch back */ 987 mov %g2, %l5 988 mov %g1, %l6 989 clr %l7 990 switch_back %g5, %g6 991 992 8: mov %sp, %l1 993 sub %g2, 128, %sp 994 ld [%sp + 104], %g1 995 ld [%sp + 108], %g2 996 ld [%sp + 112], %g3 997 ld [%sp + 116], %g4 998 ld [%sp + 120], %g7 999 mov %l1, %sp 866 1000 jmp %l2 867 1001 rett %l2 + 4
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