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irongate_bus_mem.c revision 1.8 
      1 /* $NetBSD: irongate_bus_mem.c,v 1.8 2008/04/28 20:23:11 martin 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 1.8 2008/04/28 20:23:11 martin 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 }
    136