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since bus_mem_subregion() can return failure, don't even bother to try

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to handle the case where subregion offset isn't a multiple of 8.
This commit is contained in:
cgd 1996-06-11 21:20:08 +00:00
parent d714189d53
commit bbdf2df9b0
1 changed files with 8 additions and 3 deletions
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11
sys/arch/alpha/tc/tc_bus_mem.c
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@ -1,4 +1,4 @@
/* $NetBSD: tc_bus_mem.c,v 1.4 1996/06/11 21:16:29 cgd Exp $ */
/* $NetBSD: tc_bus_mem.c,v 1.5 1996/06/11 21:20:08 cgd Exp $ */
/*
* Copyright (c) 1996 Carnegie-Mellon University.
@ -127,10 +127,15 @@ tc_mem_subregion(v, memh, offset, size, nmemh)
bus_mem_size_t offset, size;
{
/* Disallow subregioning that would make the handle unaligned. */
if ((offset & 0x7) != 0)
return (1);
if ((memh & TC_SPACE_SPARSE) != 0)
*nmemh = memh + (off << 1);
else
*nmemh = memh + off;
return (0);
}
@ -215,7 +220,7 @@ tc_mem_write_1(v, memh, off, val)
volatile u_int64_t *p, v;
u_int64_t shift, msk;
shift = off & 0x3; /* XXX breaks if subregion */
shift = off & 0x3;
off &= 0x3;
p = (u_int64_t *)(memh + (off << 1));
@ -245,7 +250,7 @@ tc_mem_write_2(v, memh, off, val)
volatile u_int64_t *p, v;
u_int64_t shift, msk;
shift = off & 0x2; /* XXX breaks if subregion */
shift = off & 0x2;
off &= 0x3;
p = (u_int64_t *)(memh + (off << 1));