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irongate_bus_mem.c revision 1.5 
      1 /* $NetBSD: irongate_bus_mem.c,v 1.5 2000/11/29 05:56:49 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2000 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 1.5 2000/11/29 05:56:49 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 void	irongate_bus_mem_init_hook(bus_space_tag_t, void *);
     57 
     58 #define	CHIP		irongate
     59 
     60 #define	CHIP_EX_MALLOC_SAFE(v)	(((struct irongate_config *)(v))->ic_mallocsafe)
     61 #define	CHIP_MEM_EXTENT(v)	(((struct irongate_config *)(v))->ic_mem_ex)
     62 
     63 #define	CHIP_MEM_SYS_START(v)	IRONGATE_MEM_BASE
     64 
     65 #define	CHIP_MEM_INIT_HOOK(t, v) irongate_bus_mem_init_hook((t), (v))
     66 
     67 /*
     68  * AMD 751 core logic appears on EV6.  We require at least EV56
     69  * support for the assembler to emit BWX opcodes.
     70  */
     71 __asm(".arch ev6");
     72 
     73 #include <alpha/pci/pci_bwx_bus_mem_chipdep.c>
     74 
     75 #include <sys/kcore.h>
     76 
     77 extern phys_ram_seg_t mem_clusters[];
     78 extern int mem_cluster_cnt;
     79 
     80 void
     81 irongate_bus_mem_init_hook(bus_space_tag_t t, void *v)
     82 {
     83 	int i, error;
     84 
     85 	/*
     86 	 * Since the AMD 751 doesn't have DMA windows, we need to
     87 	 * allocate RAM out of the extent map.
     88 	 */
     89 	for (i = 0; i < mem_cluster_cnt; i++) {
     90 		error = extent_alloc_region(CHIP_MEM_EXTENT(v),
     91 		    mem_clusters[i].start, mem_clusters[i].size,
     92 		    EX_NOWAIT | (CHIP_EX_MALLOC_SAFE(v) ? EX_MALLOCOK : 0));
     93 		if (error) {
     94 			printf("WARNING: unable reserve RAM at 0x%lx - 0x%lx\n",
     95 			    mem_clusters[i].start,
     96 			    mem_clusters[i].start + (mem_clusters[i].size - 1));
     97 		}
     98 	}
     99 }
    100