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      1 /* $NetBSD: irongate_bus_mem.c,v 1.13 2023/12/04 00:32:10 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 1.13 2023/12/04 00:32:10 thorpej Exp $");
     35 
     36 #include <sys/param.h>
     37 #include <sys/systm.h>
     38 #include <sys/syslog.h>
     39 #include <sys/device.h>
     40 
     41 #include <sys/bus.h>
     42 
     43 #include <alpha/pci/irongatereg.h>
     44 #include <alpha/pci/irongatevar.h>
     45 
     46 #define	CHIP		irongate
     47 
     48 #define	CHIP_MEM_ARENA(v)	(((struct irongate_config *)(v))->ic_mem_arena)
     49 
     50 #define	CHIP_MEM_SYS_START(v)	IRONGATE_MEM_BASE
     51 
     52 /*
     53  * AMD 751 core logic appears on EV6.  We require at least EV56
     54  * support for the assembler to emit BWX opcodes.
     55  */
     56 __asm(".arch ev6");
     57 
     58 #include <alpha/pci/pci_bwx_bus_mem_chipdep.c>
     59 
     60 #include <sys/kcore.h>
     61 
     62 #include <dev/isa/isareg.h>
     63 
     64 extern phys_ram_seg_t mem_clusters[];
     65 extern int mem_cluster_cnt;
     66 
     67 void
     68 irongate_bus_mem_init2(bus_space_tag_t t, void *v)
     69 {
     70 	u_long size, start, end;
     71 	int i, error;
     72 
     73 	/*
     74 	 * Since the AMD 751 doesn't have DMA windows, we need to
     75 	 * reserve the space used by RAM in the PCI memory arena.
     76 	 */
     77 	for (i = 0; i < mem_cluster_cnt; i++) {
     78 		start = mem_clusters[i].start;
     79 		size = mem_clusters[i].size & ~PAGE_MASK;
     80 		end = mem_clusters[i].start + size;
     81 
     82 		if (start <= IOM_BEGIN && end >= IOM_END) {
     83 			/*
     84 			 * The ISA hole lies somewhere in this
     85 			 * memory cluster.  The UP1000 firmware
     86 			 * doesn't report this to us properly,
     87 			 * so we have to cope, since devices are
     88 			 * mapped into the ISA hole, but RAM is
     89 			 * not.
     90 			 *
     91 			 * Sigh, the UP1000 is a really cool machine,
     92 			 * but it is sometimes too PC-like for my
     93 			 * taste.
     94 			 */
     95 			if (start < IOM_BEGIN) {
     96 				error = vmem_xalloc_addr(CHIP_MEM_ARENA(v),
     97 				    start, (IOM_BEGIN - start), VM_NOSLEEP);
     98 				if (error) {
     99 					printf("WARNING: unable to reserve "
    100 					    "chunk from mem cluster %d "
    101 					    "(0x%lx - 0x%lx)\n", i,
    102 					    start, (u_long) IOM_BEGIN - 1);
    103 				}
    104 			}
    105 			if (end > IOM_END) {
    106 				error = vmem_xalloc_addr(CHIP_MEM_ARENA(v),
    107 				    IOM_END, (end - IOM_END), VM_NOSLEEP);
    108 				if (error) {
    109 					printf("WARNING: unable to reserve "
    110 					    "chunk from mem cluster %d "
    111 					    "(0x%lx - 0x%lx)\n", i,
    112 					    (u_long) IOM_END, end - 1);
    113 				}
    114 			}
    115 		} else {
    116 			error = vmem_xalloc_addr(CHIP_MEM_ARENA(v),
    117 			    start, size, VM_NOSLEEP);
    118 			if (error) {
    119 				printf("WARNING: unable reserve mem cluster %d "
    120 				    "(0x%lx - 0x%lx)\n", i, start,
    121 				    start + (size - 1));
    122 			}
    123 		}
    124 	}
    125 }
    126