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tsp_bus_mem.c revision 1.7 
      1 /* $NetBSD: tsp_bus_mem.c,v 1.7 2003/07/14 23:25:40 lukem 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/cdefs.h>
     35 __KERNEL_RCSID(0, "$NetBSD: tsp_bus_mem.c,v 1.7 2003/07/14 23:25:40 lukem Exp $");
     36 
     37 #include <sys/param.h>
     38 #include <sys/systm.h>
     39 #include <sys/malloc.h>
     40 #include <sys/syslog.h>
     41 #include <sys/device.h>
     42 
     43 #include <uvm/uvm_extern.h>
     44 
     45 #include <machine/bus.h>
     46 #include <machine/autoconf.h>
     47 #include <machine/rpb.h>
     48 
     49 #include <alpha/pci/tsreg.h>
     50 #include <alpha/pci/tsvar.h>
     51 
     52 #define tsp_bus_mem() { Generate ctags(1) key. }
     53 
     54 #define	CHIP	tsp
     55 
     56 #define	CHIP_EX_MALLOC_SAFE(v)  (((struct tsp_config *)(v))->pc_mallocsafe)
     57 #define CHIP_MEM_EXTENT(v)       (((struct tsp_config *)(v))->pc_mem_ex)
     58 
     59 #define CHIP_MEM_SYS_START(v)    (((struct tsp_config *)(v))->pc_iobase)
     60 
     61 /*
     62  * Tsunami core logic appears on EV6.  We require at least EV56
     63  * support for the assembler to emit BWX opcodes.
     64  */
     65 __asm(".arch ev6");
     66 
     67 #include <alpha/pci/pci_bwx_bus_mem_chipdep.c>
     68 
     69 void
     70 tsp_bus_mem_init2(bus_space_tag_t t, void *v)
     71 {
     72 	struct tsp_config *pcp = v;
     73 	struct ts_pchip *pccsr = pcp->pc_csr;
     74 	int i, error;
     75 
     76 	/*
     77 	 * Allocate the DMA windows out of the extent map.
     78 	 */
     79 	for (i = 0; i < 4; i++) {
     80 		alpha_mb();
     81 		if ((pccsr->tsp_wsba[i].tsg_r & WSBA_ENA) == 0) {
     82 			/* Window not in use. */
     83 			continue;
     84 		}
     85 
     86 		error = extent_alloc_region(CHIP_MEM_EXTENT(v),
     87 		    WSBA_ADDR(pccsr->tsp_wsba[i].tsg_r),
     88 		    WSM_LEN(pccsr->tsp_wsm[i].tsg_r),
     89 		    EX_NOWAIT | (CHIP_EX_MALLOC_SAFE(v) ? EX_MALLOCOK : 0));
     90 		if (error) {
     91 			printf("WARNING: unable to reserve DMA window "
     92 			    "0x%lx - 0x%lx\n",
     93 			    WSBA_ADDR(pccsr->tsp_wsba[i].tsg_r),
     94 			    WSBA_ADDR(pccsr->tsp_wsba[i].tsg_r) +
     95 			    (WSM_LEN(pccsr->tsp_wsm[i].tsg_r) - 1));
     96 		}
     97 	}
     98 }
     99