1 /* $NetBSD: evbppc_machdep.c,v 1.15 2021/08/03 09:25:43 rin Exp $ */
2
3 /*
4 * Copyright 2001, 2002 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 /*
39 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
40 * Copyright (C) 1995, 1996 TooLs GmbH.
41 * All rights reserved.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. All advertising materials mentioning features or use of this software
52 * must display the following acknowledgement:
53 * This product includes software developed by TooLs GmbH.
54 * 4. The name of TooLs GmbH may not be used to endorse or promote products
55 * derived from this software without specific prior written permission.
56 *
57 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
58 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
59 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
60 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
61 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
62 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
63 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
64 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
65 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
66 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
67 */
68
69 #include <sys/cdefs.h>
70 __KERNEL_RCSID(0, "$NetBSD: evbppc_machdep.c,v 1.15 2021/08/03 09:25:43 rin Exp $");
71
72 #include <sys/param.h>
73 #include <sys/systm.h>
74 #include <sys/mount.h>
75 #include <sys/vnode.h>
76
77 #include <uvm/uvm_extern.h>
78
79 #include <machine/cpu.h>
80 #include <sys/bus.h>
81 #include <machine/pmap.h>
82
83 /*
84 * Global variables used here and there.
85 */
86 struct vm_map *phys_map = NULL;
87
88 /*
89 * XXX This should probably be in autoconf.
90 */
91 char machine[] = MACHINE;
92 char machine_arch[] = MACHINE_ARCH;
93
94 int fake_mapiodev = 1;
95
96 /*
97 * mapiodev:
98 *
99 * Allocate vm space and mapin the I/O address. Use reserved TLB
100 * mapping if one is found.
101 */
102 void *
mapiodev(paddr_t pa,psize_t len,bool prefetchable)103 mapiodev(paddr_t pa, psize_t len, bool prefetchable)
104 {
105 void *p;
106 paddr_t faddr;
107 vaddr_t taddr, va;
108 int off;
109
110 KASSERT(!prefetchable);
111
112 /*
113 * See if we have reserved TLB entry for the pa. This needs to be
114 * true for console as we can't use uvm during early bootstrap.
115 */
116 p = ppc4xx_tlb_mapiodev(pa, len);
117 if (p != NULL)
118 return (p);
119
120 if (fake_mapiodev)
121 panic("mapiodev: no TLB entry reserved for %llx+%llx",
122 (long long)pa, (long long)len);
123
124 faddr = trunc_page(pa);
125 off = pa - faddr;
126 len = round_page(off + len);
127 va = taddr = uvm_km_alloc(kernel_map, len, 0, UVM_KMF_VAONLY);
128
129 if (va == 0)
130 return NULL;
131
132 for (; len > 0; len -= PAGE_SIZE) {
133 pmap_kenter_pa(taddr, faddr,
134 VM_PROT_READ|VM_PROT_WRITE, PMAP_NOCACHE);
135 faddr += PAGE_SIZE;
136 taddr += PAGE_SIZE;
137 }
138 pmap_update(pmap_kernel());
139 return (void *)(va + off);
140 }
141
142 void
unmapiodev(vaddr_t va,vsize_t sz)143 unmapiodev(vaddr_t va, vsize_t sz)
144 {
145 /* Nothing to do for reserved (ie. not uvm_km_alloc'd) mappings. */
146 if (va < VM_MIN_KERNEL_ADDRESS || va > VM_MAX_KERNEL_ADDRESS)
147 return;
148
149 sz = round_page((va & PAGE_MASK) + sz);
150 va = trunc_page(va);
151
152 pmap_kremove(va, sz);
153 uvm_km_free(kernel_map, va, sz, UVM_KMF_VAONLY);
154 }
155