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ALCOR/ALCOR2/PYXIS have a 256-byte DMA prefetch threshold.

This commit is contained in:
thorpej 2001-07-19 18:42:42 +00:00
parent 908464bef9
commit 4c4c88dbb7
1 changed files with 6 additions and 2 deletions
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8
sys/arch/alpha/pci/cia_dma.c
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@ -1,4 +1,4 @@
/* $NetBSD: cia_dma.c,v 1.17 2001/01/03 19:16:00 thorpej Exp $ */
/* $NetBSD: cia_dma.c,v 1.18 2001/07/19 18:42:42 thorpej Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
@ -39,7 +39,7 @@
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: cia_dma.c,v 1.17 2001/01/03 19:16:00 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: cia_dma.c,v 1.18 2001/07/19 18:42:42 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -88,6 +88,9 @@ void cia_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t));
#define CIA_SGMAP_MAPPED_BASE (8*1024*1024)
#define CIA_SGMAP_MAPPED_SIZE (8*1024*1024)
/* ALCOR/ALGOR2/PYXIS have a 256-byte out-bound DMA prefetch threshold. */
#define CIA_SGMAP_PFTHRESH 256
void cia_tlb_invalidate __P((void));
void cia_broken_pyxis_tlb_invalidate __P((void));
@ -142,6 +145,7 @@ cia_dma_init(ccp)
t->_next_window = NULL;
t->_boundary = 0;
t->_sgmap = &ccp->cc_sgmap;
t->_pfthresh = CIA_SGMAP_PFTHRESH;
t->_get_tag = cia_dma_get_tag;
t->_dmamap_create = alpha_sgmap_dmamap_create;
t->_dmamap_destroy = alpha_sgmap_dmamap_destroy;