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/* cache flushing for the PPC
Copyright (C) 1998 Free Software Foundation, Inc.
This file is part of Gforth.
Gforth is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stddef.h>
#include <sys/types.h>
/* the name is from an AIX (4.3) call (thanks to Dan Prener
<prener@watson.ibm.com> for this information) */
void _sync_cache_range(caddr_t addr, size_t size)
{
size_t cache_block_size=32;
caddr_t p=(caddr_t)(((long)addr)&-cache_block_size);
/* this works for a single-processor PPC 604e, but may have
portability problems for other machines; the ultimate solution is
a system call, because the architecture is pretty shoddy in this
area */
for (; p < (addr+size); p+=cache_block_size)
asm("dcbst 0,%0; sync; icbi 0,%0"::"r"(p));
asm("sync; isync"); /* PPC 604e needs the additional sync
according to Tim Olson */
}
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