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tsp_bus_mem.c revision 1.6 
      1 /* $NetBSD: tsp_bus_mem.c,v 1.6 2000/11/29 06:30:09 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1999 by Ross Harvey.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by Ross Harvey.
     17  * 4. The name of Ross Harvey may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY ROSS HARVEY ``AS IS'' AND ANY EXPRESS
     21  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     22  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURP0SE
     23  * ARE DISCLAIMED.  IN NO EVENT SHALL ROSS HARVEY BE LIABLE FOR ANY
     24  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     30  * SUCH DAMAGE.
     31  *
     32  */
     33 
     34 #include <sys/param.h>
     35 #include <sys/systm.h>
     36 #include <sys/malloc.h>
     37 #include <sys/syslog.h>
     38 #include <sys/device.h>
     39 
     40 #include <uvm/uvm_extern.h>
     41 
     42 #include <machine/bus.h>
     43 #include <machine/autoconf.h>
     44 #include <machine/rpb.h>
     45 
     46 #include <alpha/pci/tsreg.h>
     47 #include <alpha/pci/tsvar.h>
     48 
     49 #define tsp_bus_mem() { Generate ctags(1) key. }
     50 
     51 #define	CHIP	tsp
     52 
     53 #define	CHIP_EX_MALLOC_SAFE(v)  (((struct tsp_config *)(v))->pc_mallocsafe)
     54 #define CHIP_MEM_EXTENT(v)       (((struct tsp_config *)(v))->pc_mem_ex)
     55 
     56 #define CHIP_MEM_SYS_START(v)    (((struct tsp_config *)(v))->pc_iobase)
     57 
     58 /*
     59  * Tsunami core logic appears on EV6.  We require at least EV56
     60  * support for the assembler to emit BWX opcodes.
     61  */
     62 __asm(".arch ev6");
     63 
     64 #include <alpha/pci/pci_bwx_bus_mem_chipdep.c>
     65 
     66 void
     67 tsp_bus_mem_init2(bus_space_tag_t t, void *v)
     68 {
     69 	struct tsp_config *pcp = v;
     70 	struct ts_pchip *pccsr = pcp->pc_csr;
     71 	int i, error;
     72 
     73 	/*
     74 	 * Allocate the DMA windows out of the extent map.
     75 	 */
     76 	for (i = 0; i < 4; i++) {
     77 		alpha_mb();
     78 		if ((pccsr->tsp_wsba[i].tsg_r & WSBA_ENA) == 0) {
     79 			/* Window not in use. */
     80 			continue;
     81 		}
     82 
     83 		error = extent_alloc_region(CHIP_MEM_EXTENT(v),
     84 		    WSBA_ADDR(pccsr->tsp_wsba[i].tsg_r),
     85 		    WSM_LEN(pccsr->tsp_wsm[i].tsg_r),
     86 		    EX_NOWAIT | (CHIP_EX_MALLOC_SAFE(v) ? EX_MALLOCOK : 0));
     87 		if (error) {
     88 			printf("WARNING: unable to reserve DMA window "
     89 			    "0x%lx - 0x%lx\n",
     90 			    WSBA_ADDR(pccsr->tsp_wsba[i].tsg_r),
     91 			    WSBA_ADDR(pccsr->tsp_wsba[i].tsg_r) +
     92 			    (WSM_LEN(pccsr->tsp_wsm[i].tsg_r) - 1));
     93 		}
     94 	}
     95 }
     96