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
irongate_bus_mem_init2(bus_space_tag_t t,void * v)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