sys/arch/alpha/pci/tsp_bus_mem.c

   1 /* $NetBSD: tsp_bus_mem.c,v 1.8 2005/12/11 12:16:17 christos 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 1.8 2005/12/11 12:16:17 christos 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 #define CHIP_MEM_EX_STORE(v)    (((struct tsp_config *)(v))->pc_mem_exstorage)
  59 #define CHIP_MEM_EX_STORE_SIZE(v)                                       \
  60         (sizeof (((struct tsp_config *)(v))->pc_mem_exstorage))
  61
  62 #define CHIP_MEM_SYS_START(v)    (((struct tsp_config *)(v))->pc_iobase)
  63
  64 /*
  65  * Tsunami core logic appears on EV6.  We require at least EV56
  66  * support for the assembler to emit BWX opcodes.
  67  */
  68 __asm(".arch ev6");
  69
  70 #include <alpha/pci/pci_bwx_bus_mem_chipdep.c>
  71
  72 void
  73 tsp_bus_mem_init2(bus_space_tag_t t, void *v)
  74 {
  75         struct tsp_config *pcp = v;
  76         struct ts_pchip *pccsr = pcp->pc_csr;
  77         int i, error;
  78
  79         /*
  80          * Allocate the DMA windows out of the extent map.
  81          */
  82         for (i = 0; i < 4; i++) {
  83                 alpha_mb();
  84                 if ((pccsr->tsp_wsba[i].tsg_r & WSBA_ENA) == 0) {
  85                         /* Window not in use. */
  86                         continue;
  87                 }
  88
  89                 error = extent_alloc_region(CHIP_MEM_EXTENT(v),
  90                     WSBA_ADDR(pccsr->tsp_wsba[i].tsg_r),
  91                     WSM_LEN(pccsr->tsp_wsm[i].tsg_r),
  92                     EX_NOWAIT | (CHIP_EX_MALLOC_SAFE(v) ? EX_MALLOCOK : 0));
  93                 if (error) {
  94                         printf("WARNING: unable to reserve DMA window "
  95                             "0x%lx - 0x%lx\n",
  96                             WSBA_ADDR(pccsr->tsp_wsba[i].tsg_r),
  97                             WSBA_ADDR(pccsr->tsp_wsba[i].tsg_r) +
  98                             (WSM_LEN(pccsr->tsp_wsm[i].tsg_r) - 1));
  99                 }
 100         }
 101 }