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Allocate/initialise DVMA maps and base address. 

The fact that `phys_map' is split in half for different kinds of DVMA
allocations is not ideal..
This commit is contained in:
pk 1995-06-26 22:41:23 +00:00
parent affbc4d346
commit 68e9c36909
1 changed files with 21 additions and 1 deletions
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22
sys/arch/sparc/sparc/machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: machdep.c,v 1.45 1995/05/16 21:16:37 mycroft Exp $ */
/* $NetBSD: machdep.c,v 1.46 1995/06/26 22:41:23 pk Exp $ */
/*
* Copyright (c) 1992, 1993
@ -116,6 +116,14 @@ int msgbufmapped = 1; /* message buffer is always mapped */
*/
int safepri = 0;
/*
* dvmamap is used to manage DVMA memory. Note: this coincides with
* the memory range in `phys_map' (which is mostly a place-holder).
*/
struct map *dvmamap;
vm_offset_t dvmabase;
static int ndvmamap; /* # of entries in dvmamap */
caddr_t allocsys();
/*
@ -212,6 +220,13 @@ cpu_startup()
phys_map = vm_map_create(pmap_kernel(), DVMA_BASE, DVMA_END, 1);
if (phys_map == NULL)
panic("unable to create DVMA map");
/*
* For now, allocate half of DVMA space for a (privately managed)
* pool of addresses for double mappings.
*/
dvmabase = kmem_alloc_wait(phys_map, (DVMA_END-DVMA_BASE)/2);
rminit(dvmamap, btoc((DVMA_END-DVMA_BASE)/2),
vtorc(dvmabase), "dvmamap", ndvmamap);
/*
* Finally, allocate mbuf pool. Since mclrefcnt is an off-size
@ -312,6 +327,11 @@ allocsys(v)
}
valloc(swbuf, struct buf, nswbuf);
valloc(buf, struct buf, nbuf);
/*
* Allocate DVMA slots for 1/4 of the number of i/o buffers
* and one for each process too (PHYSIO).
*/
valloc(dvmamap, struct map, ndvmamap = maxproc + ((nbuf / 4) &~ 1));
return (v);
}