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irongate_bus_mem.c revision 1.7 
      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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the NetBSD
     21  *	Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
     40 
     41 __KERNEL_RCSID(1, "$NetBSD: irongate_bus_mem.c,v 1.7 2001/04/17 21:52:00 thorpej Exp $");
     42 
     43 #include <sys/param.h>
     44 #include <sys/systm.h>
     45 #include <sys/malloc.h>
     46 #include <sys/syslog.h>
     47 #include <sys/device.h>
     48 
     49 #include <uvm/uvm_extern.h>
     50 
     51 #include <machine/bus.h>
     52 
     53 #include <alpha/pci/irongatereg.h>
     54 #include <alpha/pci/irongatevar.h>
     55 
     56 #define	CHIP		irongate
     57 
     58 #define	CHIP_EX_MALLOC_SAFE(v)	(((struct irongate_config *)(v))->ic_mallocsafe)
     59 #define	CHIP_MEM_EXTENT(v)	(((struct irongate_config *)(v))->ic_mem_ex)
     60 
     61 #define	CHIP_MEM_SYS_START(v)	IRONGATE_MEM_BASE
     62 
     63 /*
     64  * AMD 751 core logic appears on EV6.  We require at least EV56
     65  * support for the assembler to emit BWX opcodes.
     66  */
     67 __asm(".arch ev6");
     68 
     69 #include <alpha/pci/pci_bwx_bus_mem_chipdep.c>
     70 
     71 #include <sys/kcore.h>
     72 
     73 #include <dev/isa/isareg.h>
     74 
     75 extern phys_ram_seg_t mem_clusters[];
     76 extern int mem_cluster_cnt;
     77 
     78 void
     79 irongate_bus_mem_init2(bus_space_tag_t t, void *v)
     80 {
     81 	u_long size, start, end;
     82 	int i, error;
     83 
     84 	/*
     85 	 * Since the AMD 751 doesn't have DMA windows, we need to
     86 	 * allocate RAM out of the extent map.
     87 	 */
     88 	for (i = 0; i < mem_cluster_cnt; i++) {
     89 		start = mem_clusters[i].start;
     90 		size = mem_clusters[i].size & ~PAGE_MASK;
     91 		end = mem_clusters[i].start + size;
     92 
     93 		if (start <= IOM_BEGIN && end >= IOM_END) {
     94 			/*
     95 			 * The ISA hole lies somewhere in this
     96 			 * memory cluster.  The UP1000 firmware
     97 			 * doesn't report this to us properly,
     98 			 * so we have to cope, since devices are
     99 			 * mapped into the ISA hole, but RAM is
    100 			 * not.
    101 			 *
    102 			 * Sigh, the UP1000 is a really cool machine,
    103 			 * but it is sometimes too PC-like for my
    104 			 * taste.
    105 			 */
    106 			if (start < IOM_BEGIN) {
    107 				error = extent_alloc_region(CHIP_MEM_EXTENT(v),
    108 				    start, (IOM_BEGIN - start),
    109 				    EX_NOWAIT |
    110 				    (CHIP_EX_MALLOC_SAFE(v) ? EX_MALLOCOK : 0));
    111 				if (error) {
    112 					printf("WARNING: unable to reserve "
    113 					    "chunk from mem cluster %d "
    114 					    "(0x%lx - 0x%lx)\n", i,
    115 					    start, (u_long) IOM_BEGIN - 1);
    116 				}
    117 			}
    118 			if (end > IOM_END) {
    119 				error = extent_alloc_region(CHIP_MEM_EXTENT(v),
    120 				    IOM_END, (end - IOM_END),
    121 				    EX_NOWAIT |
    122 				    (CHIP_EX_MALLOC_SAFE(v) ? EX_MALLOCOK : 0));
    123 				if (error) {
    124 					printf("WARNING: unable to reserve "
    125 					    "chunk from mem cluster %d "
    126 					    "(0x%lx - 0x%lx)\n", i,
    127 					    (u_long) IOM_END, end - 1);
    128 				}
    129 			}
    130 		} else {
    131 			error = extent_alloc_region(CHIP_MEM_EXTENT(v),
    132 			    start, size,
    133 			    EX_NOWAIT |
    134 			    (CHIP_EX_MALLOC_SAFE(v) ? EX_MALLOCOK : 0));
    135 			if (error) {
    136 				printf("WARNING: unable reserve mem cluster %d "
    137 				    "(0x%lx - 0x%lx)\n", i, start,
    138 				    start + (size - 1));
    139 			}
    140 		}
    141 	}
    142 }
    143