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;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;;
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;; Copyright (C) KolibriOS team 2004-2012. 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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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 5032 $
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$Revision: 5057 $
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        invlpg  [eax]
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        invlpg  [eax]
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        pop     ebx
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        pop     ebx
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        ret
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        ret
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endp
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endp
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uglobal
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sb16_buffer_allocated db 0
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endg
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; Allocates [.size] bytes so that the target memory block
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; is inside one 64K page for 24-bit DMA controller,
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; that is, somewhere between 00xx0000h and 00xxFFFFh.
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proc alloc_dma24
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; Implementation note.
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; The only user of that function is SB16 driver,
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; so just return a statically allocated buffer.
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virtual at esp
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                dd      ? ; return address
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.size           dd      ?
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end virtual
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        cmp     [sb16_buffer_allocated], 0
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        jnz     .fail
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        inc     [sb16_buffer_allocated]
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        mov     eax, SB16Buffer
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        ret     4
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.fail:
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        xor     eax, eax
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        ret     4
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endp
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; Allocates a physical page for master page table
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; Allocates a physical page for master page table
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; that duplicates first Mb of OS_BASE at address 0;
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; that duplicates first Mb of OS_BASE at address 0;
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; used for starting APs and for shutting down,
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; used for starting APs and for shutting down,
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; where it is important to execute code in trivial-mapped pages.
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; where it is important to execute code in trivial-mapped pages.