a867274808
- Change x86biosCall() to more appropriate x86bios_intr().[1] Discussed with: delphij, paradox (ddkprog yahoo com) Submitted by: paradox (ddkprog yahoo com)[1]
82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/*-
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* Copyright (C) 1999 Egbert Eich
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and that
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* both that copyright notice and this permission notice appear in
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* supporting documentation, and that the name of the authors not be used
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* in advertising or publicity pertaining to distribution of the software
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* without specific, written prior permission. The authors makes no
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* representations about the suitability of this software for any purpose.
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* It is provided "as is" without express or implied warranty.
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*
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* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
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* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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* xserver/hw/xfree86/int10/generic.c
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <compat/x86bios/x86bios.h>
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extern u_char *pbiosMem;
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extern int busySegMap[5];
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void *
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x86bios_alloc(int count, int *segs)
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{
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int i;
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int j;
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/* find the free segblock of page */
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for (i = 0; i < (PAGE_RESERV - count); i++)
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{
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if (busySegMap[i] == 0)
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{
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/* find the capacity of segblock */
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for (j = i; j < (i + count); j++)
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{
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if (busySegMap[j] == 1)
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break;
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}
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if (j == (i + count))
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break;
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i += count;
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}
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}
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if (i == (PAGE_RESERV - count))
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return NULL;
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/* make the segblock is used */
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for (j = i; j < (i + count); j++)
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busySegMap[i] = 1;
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*segs = i * 4096;
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return (pbiosMem + *segs);
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}
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void
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x86bios_free(void *pbuf, int count)
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{
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int i;
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int busySeg;
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busySeg = ((u_char *)pbuf - pbiosMem) / 4096;
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for (i = busySeg; i < (busySeg + count); i++)
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busySegMap[i] = 0;
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}
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