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X68k's physical RAM is not at lowram-0xffffffff, but has multiple segments.

This commit is contained in:
minoura 2001-01-11 14:00:11 +00:00
parent 8829b4cc1a
commit 0ef9589af4
1 changed files with 19 additions and 4 deletions
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23
sys/arch/x68k/x68k/mem.c
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@ -1,4 +1,4 @@
/* $NetBSD: mem.c,v 1.20 2000/06/29 07:07:56 mrg Exp $ */
/* $NetBSD: mem.c,v 1.21 2001/01/11 14:00:11 minoura Exp $ */
/*
* Copyright (c) 1988 University of Utah.
@ -56,7 +56,6 @@
#include <uvm/uvm_extern.h>
extern u_int lowram;
static caddr_t devzeropage;
#define mmread mmrw
@ -85,6 +84,8 @@ mmclose(dev, flag, mode, p)
return (0);
}
static int isinram(vaddr_t);
/*ARGSUSED*/
int
mmrw(dev, uio, flags)
@ -126,7 +127,7 @@ mmrw(dev, uio, flags)
v = uio->uio_offset;
#ifndef DEBUG
/* allow reads only in RAM (except for DEBUG) */
if (v >= 0xFFFFFFFC || v < lowram) {
if (!isinram(v)) {
error = EFAULT;
goto unlock;
}
@ -222,7 +223,21 @@ mmmmap(dev, off, prot)
* XXX could be extended to allow access to IO space but must
* be very careful.
*/
if ((u_int)off < lowram || (u_int)off >= 0xFFFFFFFC)
if (!isinram ((vaddr_t) off))
return (-1);
return (m68k_btop((u_int)off));
}
static int
isinram(addr)
vaddr_t addr;
{
int i;
for (i = 0; i < vm_nphysseg; i++) {
if (ctob(vm_physmem[i].start) <= addr &&
addr < ctob(vm_physmem[i].end))
return 1;
}
return 0;
}