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[/] [or1k/] [trunk/] [mw/] [src/] [drivers/] [getbyte.s] - Blame information for rev 1773

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1 673 markom 
# 05/08/2000 Michael Temari <Michael@TemWare.Com>
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# GETBYTE/PUTBYTE for MINIX
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! sections
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.sect .text; .sect .rom; .sect .data; .sect .bss
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#include "/usr/src/kernel/protect.h"
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.extern _GETBYTE_FP
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.extern _PUTBYTE_FP
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.extern _RMW_FP
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.sect .bss
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.sect .text
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        .align  16
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_GETBYTE_FP:
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        mov     bx,ds
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        mov     ecx, 0x17
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        mov     ds, cx
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        mov     edx,4(esp)              ! offset
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        sub     ax, ax
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        movb    al,(edx)                ! byte to get
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        mov     ds,bx
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        ret
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        .align  16
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_PUTBYTE_FP:
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        mov     bx,ds
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        mov     ecx, 0x17
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        mov     ds, cx
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        mov     eax,4(esp)              ! offset
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        mov     edx,4+4(esp)            ! data byte
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        movb    (eax),dl                ! byte to store
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        mov     ds,bx
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        ret
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        .align  16
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_RMW_FP:
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        mov     bx,ds
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        mov     ecx, 0x17
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        mov     ds, cx
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        mov     eax,4(esp)              ! offset
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        orb     (eax),cl                ! byte to store
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        mov     ds,bx
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        ret

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