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Rev 597 Rev 709
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;;                                                              ;;
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;;                                                              ;;
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;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
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;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License    ;;
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;; Distributed under terms of the GNU General Public License    ;;
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;;                                                              ;;
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;;                                                              ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 597 $
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$Revision: 709 $
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 9 
 
- 
 
 10 
 
Line 10... Line 11...
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 11 
; Low-level driver for HDD access
11 
; Low-level driver for HDD access
 12 
; DMA support by Mario79
12 
; DMA support by Mario79
 13 
; Access through BIOS by diamond
13 
 
 14 
 
Line 43... Line 44...
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    jnz   hdreadcache
 44 
    jnz   hdreadcache
Line 44... Line 45...
44 
 
 45 
 
45 
    call  find_empty_slot       ; ret in edi
 46 
    call  find_empty_slot       ; ret in edi
46 
    cmp   [hd_error],0
 47 
    cmp   [hd_error],0
- 
 
 48 
    jne   return_01
- 
 
 49 
; Read through BIOS?
- 
 
 50 
        cmp     [hdpos], 0x80
47 
    jne   return_01
 51 
        jae     .bios
48 
; DMA read is permitted if [allow_dma_access]=1 or 2
 52 
; DMA read is permitted if [allow_dma_access]=1 or 2
49 
        cmp     [allow_dma_access], 2
 53 
        cmp     [allow_dma_access], 2
50 
        ja      .nodma
 54 
        ja      .nodma
51 
        cmp     [dma_hdd], 1
 55 
        cmp     [dma_hdd], 1
52 
        jnz     .nodma
 56 
        jnz     .nodma
53 
        call    hd_read_dma
 57 
        call    hd_read_dma
54 
        jmp     @f
 58 
        jmp     @f
55 
.nodma:
 59 
.nodma:
- 
 
 60 
        call    hd_read_pio
- 
 
 61 
        jmp     @f
- 
 
 62 
.bios:
56 
        call    hd_read_pio
 63 
        call    bd_read
57 
@@:
 64 
@@:
58 
;    lea   esi,[edi*8+HD_CACHE]
 65 
;    lea   esi,[edi*8+HD_CACHE]
59 
;    push  eax
 66 
;    push  eax
60 
    call  calculate_cache_1
 67 
    call  calculate_cache_1
Line 673... Line 680...
673 
align 4
 680 
align 4
674 
write_cache_sector:
 681 
write_cache_sector:
675 
        mov     [cache_chain_size],1
 682 
        mov     [cache_chain_size],1
676 
        mov     [cache_chain_pos],edi
 683 
        mov     [cache_chain_pos],edi
677 
write_cache_chain:
 684 
write_cache_chain:
- 
 
 685 
        cmp     [hdpos], 0x80
- 
 
 686 
        jae     bd_write_cache_chain
678 
        push    esi
 687 
        push    esi
679 
        mov     eax, IDE_descriptor_table
 688 
        mov     eax, IDE_descriptor_table
680 
        mov     edx,eax
 689 
        mov     edx,eax
681 
        pusha
 690 
        pusha
682 
        mov     esi,[cache_chain_pos]
 691 
        mov     esi,[cache_chain_pos]
Line 771... Line 780...
771 
 
 780 
 
772 
uglobal
 781 
uglobal
773 
IDEContrRegsBaseAddr    dw      ?
 782 
IDEContrRegsBaseAddr    dw      ?
774 
endg
 783 
endg
- 
 
 784 
; \end{Mario79}
- 
 
 785 
 
- 
 
 786 
; \begin{diamond}
- 
 
 787 
uglobal
- 
 
 788 
bios_hdpos      dd      0       ; 0 is invalid value for [hdpos]
- 
 
 789 
bios_cur_sector dd      ?
- 
 
 790 
bios_read_len   dd      ?
- 
 
 791 
endg
- 
 
 792 
bd_read:
- 
 
 793 
        push    eax
- 
 
 794 
        push    edx
- 
 
 795 
        mov     edx, [bios_hdpos]
- 
 
 796 
        cmp     edx, [hdpos]
- 
 
 797 
        jne     .notread
- 
 
 798 
        mov     edx, [bios_cur_sector]
- 
 
 799 
        cmp     eax, edx
- 
 
 800 
        jb      .notread
- 
 
 801 
        add     edx, [bios_read_len]
- 
 
 802 
        dec     edx
- 
 
 803 
        cmp     eax, edx
- 
 
 804 
        ja      .notread
- 
 
 805 
        sub     eax, [bios_cur_sector]
- 
 
 806 
        shl     eax, 9
- 
 
 807 
        add     eax, (OS_BASE+0x9C000)
- 
 
 808 
        push    ecx esi edi
- 
 
 809 
        mov     esi, eax
- 
 
 810 
        shl     edi, 9
- 
 
 811 
;        add     edi, HD_CACHE+0x10000
- 
 
 812 
        push  eax
- 
 
 813 
        call  calculate_cache_2
- 
 
 814 
        add   edi,eax
- 
 
 815 
        pop   eax
- 
 
 816 
 
- 
 
 817 
        mov     ecx, 512/4
- 
 
 818 
        cld
- 
 
 819 
        rep     movsd
- 
 
 820 
        pop     edi esi ecx
- 
 
 821 
        pop     edx
- 
 
 822 
        pop     eax
- 
 
 823 
        ret
- 
 
 824 
.notread:
- 
 
 825 
        push    ecx
- 
 
 826 
        mov     dl, 42h
- 
 
 827 
        mov     ecx, 16
- 
 
 828 
        call    int13_call
- 
 
 829 
        pop     ecx
- 
 
 830 
        test    eax, eax
- 
 
 831 
        jnz     .v86err
- 
 
 832 
        test    edx, edx
- 
 
 833 
        jz      .readerr
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 834 
        mov     [bios_read_len], edx
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 835 
        mov     edx, [hdpos]
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 836 
        mov     [bios_hdpos], edx
- 
 
 837 
        pop     edx
- 
 
 838 
        pop     eax
- 
 
 839 
        mov     [bios_cur_sector], eax
- 
 
 840 
        jmp     bd_read
- 
 
 841 
.readerr:
- 
 
 842 
.v86err:
- 
 
 843 
        mov     [hd_error], 1
- 
 
 844 
        jmp     hd_read_error
- 
 
 845 
 
- 
 
 846 
bd_write_cache_chain:
- 
 
 847 
        pusha
- 
 
 848 
        mov     esi, [cache_chain_pos]
- 
 
 849 
        shl     esi, 9
- 
 
 850 
        call    calculate_cache_2
- 
 
 851 
        add     esi, eax
- 
 
 852 
        mov     edi, OS_BASE + 0x9C000
- 
 
 853 
        movzx   ecx, [cache_chain_size]
- 
 
 854 
        push    ecx
- 
 
 855 
        shl     ecx, 9-2
- 
 
 856 
        rep     movsd
- 
 
 857 
        pop     ecx
- 
 
 858 
        mov     dl, 43h
- 
 
 859 
        mov     eax, [cache_chain_ptr]
- 
 
 860 
        mov     eax, [eax]
- 
 
 861 
        call    int13_call
- 
 
 862 
        test    eax, eax
- 
 
 863 
        jnz     .v86err
- 
 
 864 
        cmp     edx, ecx
- 
 
 865 
        jnz     .writeerr
- 
 
 866 
        popa
- 
 
 867 
        ret
- 
 
 868 
.v86err:
- 
 
 869 
.writeerr:
- 
 
 870 
        popa
- 
 
 871 
        mov     [hd_error], 1
- 
 
 872 
        jmp     hd_write_error
- 
 
 873 
 
- 
 
 874 
uglobal
- 
 
 875 
int13_regs_in   rb      v86_regs.size
- 
 
 876 
int13_regs_out  rb      v86_regs.size
- 
 
 877 
endg
- 
 
 878 
 
- 
 
 879 
int13_call:
- 
 
 880 
; Because this code uses fixed addresses,
- 
 
 881 
; it can not be run simultaniously by many threads.
- 
 
 882 
; In current implementation it is protected by common mutex 'hd1_status'
- 
 
 883 
        mov     word [BOOT_VAR + 510h], 10h             ; packet length
- 
 
 884 
        mov     word [BOOT_VAR + 512h], cx              ; number of sectors
- 
 
 885 
        mov     dword [BOOT_VAR + 514h], 9C000000h      ; buffer 9C00:0000
- 
 
 886 
        mov     dword [BOOT_VAR + 518h], eax
- 
 
 887 
        and     dword [BOOT_VAR + 51Ch], 0
- 
 
 888 
        push    ebx ecx esi edi
- 
 
 889 
        mov     ebx, int13_regs_in
- 
 
 890 
        mov     edi, ebx
- 
 
 891 
        mov     ecx, v86_regs.size/4
- 
 
 892 
        xor     eax, eax
- 
 
 893 
        rep     stosd
- 
 
 894 
        mov     byte [ebx+v86_regs.eax+1], dl
- 
 
 895 
        mov     eax, [hdpos]
- 
 
 896 
        lea     eax, [BiosDisksData+(eax-80h)*4]
- 
 
 897 
        mov     dl, [eax]
- 
 
 898 
        mov     byte [ebx+v86_regs.edx], dl
- 
 
 899 
        movzx   edx, byte [eax+1]
- 
 
 900 
;        mov     dl, 5
- 
 
 901 
        test    edx, edx
- 
 
 902 
        jnz     .hasirq
- 
 
 903 
        dec     edx
- 
 
 904 
        jmp     @f
- 
 
 905 
.hasirq:
- 
 
 906 
        pushad
- 
 
 907 
        stdcall enable_irq, edx
- 
 
 908 
        popad
- 
 
 909 
@@:
- 
 
 910 
        mov     word [ebx+v86_regs.esi], 510h
- 
 
 911 
        mov     word [ebx+v86_regs.esp], 900h
- 
 
 912 
        mov     word [ebx+v86_regs.eip], 500h
- 
 
 913 
        mov     [ebx+v86_regs.eflags], 20200h
- 
 
 914 
        mov     esi, [sys_v86_machine]
- 
 
 915 
        mov     ecx, 0x502
- 
 
 916 
        call    v86_start
- 
 
 917 
        and     [bios_hdpos], 0
- 
 
 918 
        pop     edi esi ecx ebx
- 
 
 919 
        movzx   edx, byte [BOOT_VAR + 512h]
- 
 
 920 
        test    byte [int13_regs_out+v86_regs.eflags], 1
- 
 
 921 
        jnz     @f
- 
 
 922 
        mov     edx, ecx
- 
 
 923 
@@:
- 
 
 924 
        ret