sys/arch/alpha/pci/irongate_bus_mem.c

   1 /* $NetBSD: irongate_bus_mem.c,v 1.7 2001/04/17 21:52:00 thorpej Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2000, 2001 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jason R. Thorpe.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */
  33
  34 __KERNEL_RCSID(1, "$NetBSD: irongate_bus_mem.c,v 1.7 2001/04/17 21:52:00 thorpej Exp $");
  35
  36 #include <sys/param.h>
  37 #include <sys/systm.h>
  38 #include <sys/malloc.h>
  39 #include <sys/syslog.h>
  40 #include <sys/device.h>
  41
  42 #include <uvm/uvm_extern.h>
  43
  44 #include <machine/bus.h>
  45
  46 #include <alpha/pci/irongatereg.h>
  47 #include <alpha/pci/irongatevar.h>
  48
  49 #define CHIP            irongate
  50
  51 #define CHIP_EX_MALLOC_SAFE(v)  (((struct irongate_config *)(v))->ic_mallocsafe)
  52 #define CHIP_MEM_EXTENT(v)      (((struct irongate_config *)(v))->ic_mem_ex)
  53
  54 #define CHIP_MEM_SYS_START(v)   IRONGATE_MEM_BASE
  55
  56 /*
  57  * AMD 751 core logic appears on EV6.  We require at least EV56
  58  * support for the assembler to emit BWX opcodes.
  59  */
  60 __asm(".arch ev6");
  61
  62 #include <alpha/pci/pci_bwx_bus_mem_chipdep.c>
  63
  64 #include <sys/kcore.h>
  65
  66 #include <dev/isa/isareg.h>
  67
  68 extern phys_ram_seg_t mem_clusters[];
  69 extern int mem_cluster_cnt;
  70
  71 void
  72 irongate_bus_mem_init2(bus_space_tag_t t, void *v)
  73 {
  74         u_long size, start, end;
  75         int i, error;
  76
  77         /*
  78          * Since the AMD 751 doesn't have DMA windows, we need to
  79          * allocate RAM out of the extent map.
  80          */
  81         for (i = 0; i < mem_cluster_cnt; i++) {
  82                 start = mem_clusters[i].start;
  83                 size = mem_clusters[i].size & ~PAGE_MASK;
  84                 end = mem_clusters[i].start + size;
  85
  86                 if (start <= IOM_BEGIN && end >= IOM_END) {
  87                         /*
  88                          * The ISA hole lies somewhere in this
  89                          * memory cluster.  The UP1000 firmware
  90                          * doesn't report this to us properly,
  91                          * so we have to cope, since devices are
  92                          * mapped into the ISA hole, but RAM is
  93                          * not.
  94                          *
  95                          * Sigh, the UP1000 is a really cool machine,
  96                          * but it is sometimes too PC-like for my
  97                          * taste.
  98                          */
  99                         if (start < IOM_BEGIN) {
 100                                 error = extent_alloc_region(CHIP_MEM_EXTENT(v),
 101                                     start, (IOM_BEGIN - start),
 102                                     EX_NOWAIT |
 103                                     (CHIP_EX_MALLOC_SAFE(v) ? EX_MALLOCOK : 0));
 104                                 if (error) {
 105                                         printf("WARNING: unable to reserve "
 106                                             "chunk from mem cluster %d "
 107                                             "(0x%lx - 0x%lx)\n", i,
 108                                             start, (u_long) IOM_BEGIN - 1);
 109                                 }
 110                         }
 111                         if (end > IOM_END) {
 112                                 error = extent_alloc_region(CHIP_MEM_EXTENT(v),
 113                                     IOM_END, (end - IOM_END),
 114                                     EX_NOWAIT |
 115                                     (CHIP_EX_MALLOC_SAFE(v) ? EX_MALLOCOK : 0));
 116                                 if (error) {
 117                                         printf("WARNING: unable to reserve "
 118                                             "chunk from mem cluster %d "
 119                                             "(0x%lx - 0x%lx)\n", i,
 120                                             (u_long) IOM_END, end - 1);
 121                                 }
 122                         }
 123                 } else {
 124                         error = extent_alloc_region(CHIP_MEM_EXTENT(v),
 125                             start, size,
 126                             EX_NOWAIT |
 127                             (CHIP_EX_MALLOC_SAFE(v) ? EX_MALLOCOK : 0));
 128                         if (error) {
 129                                 printf("WARNING: unable reserve mem cluster %d "
 130                                     "(0x%lx - 0x%lx)\n", i, start,
 131                                     start + (size - 1));
 132                         }
 133                 }
 134         }
 135 }