NetBSD-5.0.2/sys/arch/alpha/pci/tsp_bus_mem.c

/* $NetBSD: tsp_bus_mem.c,v 1.8 2005/12/11 12:16:17 christos Exp $ */

/*-
 * Copyright (c) 1999 by Ross Harvey.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by Ross Harvey.
 * 4. The name of Ross Harvey may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY ROSS HARVEY ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURP0SE
 * ARE DISCLAIMED.  IN NO EVENT SHALL ROSS HARVEY BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tsp_bus_mem.c,v 1.8 2005/12/11 12:16:17 christos Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/syslog.h>
#include <sys/device.h>

#include <uvm/uvm_extern.h>

#include <machine/bus.h>
#include <machine/autoconf.h>
#include <machine/rpb.h>

#include <alpha/pci/tsreg.h>
#include <alpha/pci/tsvar.h>

#define tsp_bus_mem() { Generate ctags(1) key. }

#define	CHIP	tsp

#define	CHIP_EX_MALLOC_SAFE(v)  (((struct tsp_config *)(v))->pc_mallocsafe)
#define CHIP_MEM_EXTENT(v)       (((struct tsp_config *)(v))->pc_mem_ex)

#define CHIP_MEM_SYS_START(v)    (((struct tsp_config *)(v))->pc_iobase)

/* 
 * Tsunami core logic appears on EV6.  We require at least EV56          
 * support for the assembler to emit BWX opcodes.
 */                                                                      
__asm(".arch ev6");                                                      

#include <alpha/pci/pci_bwx_bus_mem_chipdep.c>

void
tsp_bus_mem_init2(bus_space_tag_t t, void *v)
{
	struct tsp_config *pcp = v;
	struct ts_pchip *pccsr = pcp->pc_csr;
	int i, error;

	/*
	 * Allocate the DMA windows out of the extent map.
	 */
	for (i = 0; i < 4; i++) {
		alpha_mb();
		if ((pccsr->tsp_wsba[i].tsg_r & WSBA_ENA) == 0) {
			/* Window not in use. */
			continue;
		}

		error = extent_alloc_region(CHIP_MEM_EXTENT(v),
		    WSBA_ADDR(pccsr->tsp_wsba[i].tsg_r),
		    WSM_LEN(pccsr->tsp_wsm[i].tsg_r),
		    EX_NOWAIT | (CHIP_EX_MALLOC_SAFE(v) ? EX_MALLOCOK : 0));
		if (error) {
			printf("WARNING: unable to reserve DMA window "
			    "0x%lx - 0x%lx\n",
			    WSBA_ADDR(pccsr->tsp_wsba[i].tsg_r),
			    WSBA_ADDR(pccsr->tsp_wsba[i].tsg_r) +
			    (WSM_LEN(pccsr->tsp_wsm[i].tsg_r) - 1));
		}
	}
}