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Add bus_mem_(un)map functions.

This commit is contained in:
leo 1996-11-06 13:53:35 +00:00
parent 11a4058f20
commit bc03497d55
1 changed files with 54 additions and 1 deletions
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55
sys/arch/atari/atari/machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: machdep.c,v 1.32 1996/10/25 19:58:43 leo Exp $ */
/* $NetBSD: machdep.c,v 1.33 1996/11/06 13:53:35 leo Exp $ */
/*
* Copyright (c) 1988 University of Utah.
@ -91,6 +91,7 @@
#include <machine/psl.h>
#include <machine/pte.h>
#include <machine/iomap.h>
#include <machine/bus.h>
#include <dev/cons.h>
static void bootsync __P((void));
@ -1424,3 +1425,55 @@ cpu_exec_aout_makecmds(p, epp)
#endif
return(error);
}
int
bus_mem_map(t, bpa, size, cachable, mhp)
bus_chipset_tag_t t;
bus_mem_addr_t bpa;
bus_mem_size_t size;
int cachable;
bus_mem_handle_t *mhp;
{
vm_offset_t va;
u_long pa, endpa;
pa = atari_trunc_page(bpa);
endpa = atari_round_page((bpa + size) - 1);
#ifdef DIAGNOSTIC
if (endpa <= pa)
panic("bus_mem_map: overflow");
#endif
va = kmem_alloc_pageable(kernel_map, endpa - pa);
if (va == 0)
return 1;
*mhp = (caddr_t)(va + (bpa & PGOFSET));
for(; pa < endpa; pa += NBPG, va += NBPG) {
pmap_enter(pmap_kernel(), (vm_offset_t)va, pa,
VM_PROT_READ|VM_PROT_WRITE, TRUE);
if (!cachable)
pmap_changebit(pa, PG_CI, TRUE);
}
return (0);
}
void
bus_mem_unmap(t, memh, size)
bus_chipset_tag_t t;
bus_mem_handle_t memh;
bus_mem_size_t size;
{
vm_offset_t va, endva;
va = atari_trunc_page(memh);
endva = atari_round_page((memh + size) - 1);
#ifdef DIAGNOSTIC
if (endva < va)
panic("unmap_iospace: overflow");
#endif
kmem_free(kernel_map, va, endva - va);
}