reformatted
This commit is contained in:
Markus Fröschle
@@ -2,7 +2,7 @@
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* offscreen.c
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*
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* based from Emutos / BDOS
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*
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*
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* Copyright (c) 2001 Lineo, Inc.
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*
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* Authors: Karl T. Braun, Martin Doering, Laurent Vogel
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@@ -23,10 +23,10 @@
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MD
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{
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MD *m_link;
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long m_start;
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long m_length;
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void *m_own;
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MD *m_link;
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long m_start;
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long m_length;
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void *m_own;
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};
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/* MPB - Memory Partition Block */
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@@ -35,9 +35,9 @@ MD
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MPB
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{
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MD *mp_mfl;
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MD *mp_mal;
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MD *mp_rover;
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MD *mp_mfl;
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MD *mp_mal;
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MD *mp_rover;
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};
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#define MAXMD 256
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@@ -48,247 +48,247 @@ static long wrap;
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static void *xmgetblk(void)
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{
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int i;
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for (i = 0; i < MAXMD; i++)
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{
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if(tab_md[i].m_own == NULL)
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{
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tab_md[i].m_own = (void*)1L;
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return(&tab_md[i]);
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}
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}
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return(NULL);
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int i;
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for (i = 0; i < MAXMD; i++)
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{
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if(tab_md[i].m_own == NULL)
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{
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tab_md[i].m_own = (void*)1L;
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return(&tab_md[i]);
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}
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}
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return(NULL);
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}
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static void xmfreblk(void *m)
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{
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int i = (int)(((long)m - (long)tab_md) / sizeof(MD));
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if((i > 0) && (i < MAXMD))
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tab_md[i].m_own = NULL;
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int i = (int)(((long)m - (long)tab_md) / sizeof(MD));
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if((i > 0) && (i < MAXMD))
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tab_md[i].m_own = NULL;
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}
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static MD *ffit(long amount, MPB *mp)
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{
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MD *p,*q,*p1; /* free list is composed of MD's */
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int maxflg;
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long maxval;
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if(amount != -1)
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{
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MD *p,*q,*p1; /* free list is composed of MD's */
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int maxflg;
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long maxval;
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if(amount != -1)
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{
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#if 1
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amount += (wrap - 1);
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amount /= wrap;
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amount *= wrap; /* screen line alignment */
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amount += (wrap - 1);
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amount /= wrap;
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amount *= wrap; /* screen line alignment */
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#else
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amount += 15; /* 16 bytes alignment */
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amount &= 0xFFFFFFF0;
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amount += 15; /* 16 bytes alignment */
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amount &= 0xFFFFFFF0;
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#endif
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}
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if((q = mp->mp_rover) == 0) /* get rotating pointer */
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return(0) ;
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maxval = 0;
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maxflg = ((amount == -1) ? true : false) ;
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p = q->m_link; /* start with next MD */
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do /* search the list for an MD with enough space */
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{
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if(p == NULL)
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{
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/* at end of list, wrap back to start */
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q = (MD *) &mp->mp_mfl; /* q => mfl field */
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p = q->m_link; /* p => 1st MD */
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}
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if((!maxflg) && (p->m_length >= amount))
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{
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/* big enough */
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if(p->m_length == amount)
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q->m_link = p->m_link; /* take the whole thing */
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else
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{
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/* break it up - 1st allocate a new
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MD to describe the remainder */
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p1 = xmgetblk();
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if(p1 == NULL)
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return(NULL);
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/* init new MD */
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p1->m_length = p->m_length - amount;
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p1->m_start = p->m_start + amount;
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p1->m_link = p->m_link;
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p->m_length = amount; /* adjust allocated block */
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q->m_link = p1;
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}
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/* link allocate block into allocated list,
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mark owner of block, & adjust rover */
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p->m_link = mp->mp_mal;
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mp->mp_mal = p;
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mp->mp_rover = (q == (MD *) &mp->mp_mfl ? q->m_link : q);
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return(p); /* got some */
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}
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else if(p->m_length > maxval)
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maxval = p->m_length;
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p = ( q=p )->m_link;
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}
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while(q != mp->mp_rover);
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/* return either the max, or 0 (error) */
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if(maxflg)
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{
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maxval -= 15; /* 16 bytes alignment */
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if(maxval < 0)
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maxval = 0;
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else
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maxval &= 0xFFFFFFF0;
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}
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return(maxflg ? (MD *) maxval : 0);
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}
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if((q = mp->mp_rover) == 0) /* get rotating pointer */
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return(0) ;
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maxval = 0;
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maxflg = ((amount == -1) ? true : false) ;
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p = q->m_link; /* start with next MD */
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do /* search the list for an MD with enough space */
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{
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if(p == NULL)
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{
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/* at end of list, wrap back to start */
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q = (MD *) &mp->mp_mfl; /* q => mfl field */
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p = q->m_link; /* p => 1st MD */
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}
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if((!maxflg) && (p->m_length >= amount))
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{
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/* big enough */
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if(p->m_length == amount)
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q->m_link = p->m_link; /* take the whole thing */
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else
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{
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/* break it up - 1st allocate a new
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MD to describe the remainder */
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p1 = xmgetblk();
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if(p1 == NULL)
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return(NULL);
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/* init new MD */
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p1->m_length = p->m_length - amount;
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p1->m_start = p->m_start + amount;
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p1->m_link = p->m_link;
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p->m_length = amount; /* adjust allocated block */
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q->m_link = p1;
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}
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/* link allocate block into allocated list,
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mark owner of block, & adjust rover */
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p->m_link = mp->mp_mal;
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mp->mp_mal = p;
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mp->mp_rover = (q == (MD *) &mp->mp_mfl ? q->m_link : q);
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return(p); /* got some */
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}
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else if(p->m_length > maxval)
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maxval = p->m_length;
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p = ( q=p )->m_link;
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}
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while(q != mp->mp_rover);
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/* return either the max, or 0 (error) */
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if(maxflg)
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{
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maxval -= 15; /* 16 bytes alignment */
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if(maxval < 0)
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maxval = 0;
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else
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maxval &= 0xFFFFFFF0;
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}
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return(maxflg ? (MD *) maxval : 0);
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}
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static void freeit(MD *m, MPB *mp)
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{
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MD *p, *q;
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q = NULL;
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for (p = mp->mp_mfl; p ; p = (q=p) -> m_link)
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{
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if(m->m_start <= p->m_start)
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break;
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}
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m->m_link = p;
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if(q)
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q->m_link = m;
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else
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mp->mp_mfl = m;
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if(!mp->mp_rover)
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mp->mp_rover = m;
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if(p)
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{
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if(m->m_start + m->m_length == p->m_start)
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{ /* join to higher neighbor */
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m->m_length += p->m_length;
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m->m_link = p->m_link;
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if(p == mp->mp_rover)
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mp->mp_rover = m;
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xmfreblk(p);
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}
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}
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if(q)
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{
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if(q->m_start + q->m_length == m->m_start)
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{ /* join to lower neighbor */
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q->m_length += m->m_length;
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q->m_link = m->m_link;
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if(m == mp->mp_rover)
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mp->mp_rover = q;
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xmfreblk(m);
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}
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}
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MD *p, *q;
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q = NULL;
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for (p = mp->mp_mfl; p ; p = (q=p) -> m_link)
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{
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if(m->m_start <= p->m_start)
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break;
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}
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m->m_link = p;
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if(q)
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q->m_link = m;
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else
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mp->mp_mfl = m;
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if(!mp->mp_rover)
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mp->mp_rover = m;
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if(p)
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{
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if(m->m_start + m->m_length == p->m_start)
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{ /* join to higher neighbor */
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m->m_length += p->m_length;
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m->m_link = p->m_link;
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if(p == mp->mp_rover)
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mp->mp_rover = m;
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xmfreblk(p);
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}
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}
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if(q)
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{
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if(q->m_start + q->m_length == m->m_start)
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{ /* join to lower neighbor */
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q->m_length += m->m_length;
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q->m_link = m->m_link;
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if(m == mp->mp_rover)
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mp->mp_rover = q;
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xmfreblk(m);
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}
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}
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}
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long offscreen_free(struct fb_info *info, long addr)
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{
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MD *p,**q;
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MPB *mpb;
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MD *p,**q;
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MPB *mpb;
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#ifdef DEBUG
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char buf[10];
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Funcs_puts("radeon_offscreen_free(0x");
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Funcs_ltoa(buf, addr, 16);
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Funcs_puts(buf);
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Funcs_puts("\r\n");
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char buf[10];
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Funcs_puts("radeon_offscreen_free(0x");
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Funcs_ltoa(buf, addr, 16);
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Funcs_puts(buf);
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Funcs_puts("\r\n");
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#endif
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//*vblsem = 0;
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mpb = &pmd;
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for (p = *(q = &mpb->mp_mal); p; p = *(q = &p->m_link))
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{
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if(addr == p->m_start)
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break;
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}
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if(!p)
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{
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// *vblsem = 1;
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return -1; //(EFAULT);
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}
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*q = p->m_link;
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freeit(p,mpb);
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//*vblsem = 1;
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return(0);
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//*vblsem = 0;
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mpb = &pmd;
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for (p = *(q = &mpb->mp_mal); p; p = *(q = &p->m_link))
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{
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if(addr == p->m_start)
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break;
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}
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if(!p)
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{
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// *vblsem = 1;
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return -1; //(EFAULT);
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}
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*q = p->m_link;
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freeit(p,mpb);
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//*vblsem = 1;
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return(0);
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}
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long offscreen_alloc(struct fb_info *info, long amount)
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{
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long ret;
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MD *m;
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long ret;
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MD *m;
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#ifdef DEBUG
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char buf[10];
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Funcs_puts("radeon_offscreen_alloc(0x");
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Funcs_ltoa(buf, amount, 16);
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Funcs_puts(buf);
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Funcs_puts(") = 0x");
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char buf[10];
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Funcs_puts("radeon_offscreen_alloc(0x");
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Funcs_ltoa(buf, amount, 16);
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Funcs_puts(buf);
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Funcs_puts(") = 0x");
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#endif
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// *vblsem = 0;
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if(amount == -1L)
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{
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ret = (long)ffit(-1L,&pmd);
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// *vblsem = 1;
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return(ret);
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}
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if(amount <= 0 )
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{
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// *vblsem = 1;
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return(0);
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}
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if((amount & 1))
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amount++;
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m = ffit(amount,&pmd);
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if(m == NULL)
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{
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// *vblsem = 0;
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if(amount == -1L)
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{
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ret = (long)ffit(-1L,&pmd);
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// *vblsem = 1;
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return(ret);
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}
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if(amount <= 0 )
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{
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// *vblsem = 1;
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return(0);
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}
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if((amount & 1))
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amount++;
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m = ffit(amount,&pmd);
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if(m == NULL)
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{
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#ifdef DEBUG
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Funcs_puts("0\r\n");
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Funcs_puts("0\r\n");
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#endif
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// *vblsem = 1;
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return(0);
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}
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// *vblsem = 1;
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return(0);
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}
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#ifdef DEBUG
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Funcs_ltoa(buf, m->m_start, 16);
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Funcs_puts(buf);
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Funcs_puts("\r\n");
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Funcs_ltoa(buf, m->m_start, 16);
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Funcs_puts(buf);
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Funcs_puts("\r\n");
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#endif
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ret = (long)m->m_start;
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// *vblsem = 1;
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return(ret);
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ret = (long)m->m_start;
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// *vblsem = 1;
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return(ret);
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}
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long offscren_reserved(struct fb_info *info)
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{
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return((long) info->ram_base + (long) info->ram_size);
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return((long) info->ram_base + (long) info->ram_size);
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}
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void offscreen_init(struct fb_info *info)
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{
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#ifdef DEBUG
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char buf[10];
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char buf[10];
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#endif
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long size_screen, max_offscreen_size;
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wrap = (long) info->var.xres_virtual * (long)(info->var.bits_per_pixel / 8);
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size_screen = (long)info->var.yres_virtual * wrap;
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if(!size_screen)
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size_screen = (long)info->screen_size;
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pmd.mp_mfl = pmd.mp_rover = &tab_md[0];
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tab_md[0].m_link = (MD *)NULL;
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tab_md[0].m_start = (long)((unsigned long)info->ram_base + (unsigned long)size_screen);
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tab_md[0].m_length = (long)info->ram_size - size_screen;
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tab_md[0].m_own = (void *)1L;
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max_offscreen_size = ((long)info->var.xres_virtual * 8192L * (long)(info->var.bits_per_pixel / 8)) - size_screen;
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if(max_offscreen_size < 0)
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max_offscreen_size = 0;
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if(tab_md[0].m_length > max_offscreen_size)
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tab_md[0].m_length = max_offscreen_size;
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long size_screen, max_offscreen_size;
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wrap = (long) info->var.xres_virtual * (long)(info->var.bits_per_pixel / 8);
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size_screen = (long)info->var.yres_virtual * wrap;
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if(!size_screen)
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size_screen = (long)info->screen_size;
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pmd.mp_mfl = pmd.mp_rover = &tab_md[0];
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tab_md[0].m_link = (MD *)NULL;
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tab_md[0].m_start = (long)((unsigned long)info->ram_base + (unsigned long)size_screen);
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tab_md[0].m_length = (long)info->ram_size - size_screen;
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tab_md[0].m_own = (void *)1L;
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max_offscreen_size = ((long)info->var.xres_virtual * 8192L * (long)(info->var.bits_per_pixel / 8)) - size_screen;
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if(max_offscreen_size < 0)
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max_offscreen_size = 0;
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if(tab_md[0].m_length > max_offscreen_size)
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tab_md[0].m_length = max_offscreen_size;
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#ifdef DEBUG
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Funcs_puts("offscreen_init start 0x");
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Funcs_ltoa(buf, tab_md[0].m_start, 16);
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Funcs_puts(buf);
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Funcs_puts(", length 0x");
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Funcs_ltoa(buf, tab_md[0].m_length, 16);
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Funcs_puts(buf);
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Funcs_puts(", ram_size 0x");
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Funcs_ltoa(buf, (long)info->ram_size, 16);
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Funcs_puts(buf);
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Funcs_puts("\r\n");
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Funcs_puts("offscreen_init start 0x");
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Funcs_ltoa(buf, tab_md[0].m_start, 16);
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Funcs_puts(buf);
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Funcs_puts(", length 0x");
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Funcs_ltoa(buf, tab_md[0].m_length, 16);
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Funcs_puts(buf);
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Funcs_puts(", ram_size 0x");
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Funcs_ltoa(buf, (long)info->ram_size, 16);
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||||
Funcs_puts(buf);
|
||||
Funcs_puts("\r\n");
|
||||
#endif
|
||||
pmd.mp_mal = (MD *)NULL;
|
||||
pmd.mp_mal = (MD *)NULL;
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user