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1 | /* |
2 | * ========== Copyright Header Begin ========================================== | |
3 | * | |
4 | * Hypervisor Software File: prom_alloc.c | |
5 | * | |
6 | * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
7 | * | |
8 | * - Do no alter or remove copyright notices | |
9 | * | |
10 | * - Redistribution and use of this software in source and binary forms, with | |
11 | * or without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistribution of source code must retain the above copyright notice, | |
15 | * this list of conditions and the following disclaimer. | |
16 | * | |
17 | * - Redistribution in binary form must reproduce the above copyright notice, | |
18 | * this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * | |
21 | * Neither the name of Sun Microsystems, Inc. or the names of contributors | |
22 | * may be used to endorse or promote products derived from this software | |
23 | * without specific prior written permission. | |
24 | * | |
25 | * This software is provided "AS IS," without a warranty of any kind. | |
26 | * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, | |
27 | * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A | |
28 | * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN | |
29 | * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR | |
30 | * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR | |
31 | * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN | |
32 | * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR | |
33 | * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE | |
34 | * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, | |
35 | * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF | |
36 | * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. | |
37 | * | |
38 | * You acknowledge that this software is not designed, licensed or | |
39 | * intended for use in the design, construction, operation or maintenance of | |
40 | * any nuclear facility. | |
41 | * | |
42 | * ========== Copyright Header End ============================================ | |
43 | */ | |
44 | /* | |
45 | * Copyright (c) 2000-2003 Sun Microsystems, Inc. | |
46 | * All rights reserved. | |
47 | * Use is subject to license terms. | |
48 | */ | |
49 | ||
50 | #pragma ident "@(#)prom_alloc.c 1.1 00/07/22 SMI" | |
51 | ||
52 | #include <sys/promif.h> | |
53 | #include <sys/promimpl.h> | |
54 | ||
55 | /* | |
56 | * This allocator has OBP-like semantics associated with it. | |
57 | * Specifically, the alignment value specifies both a physical | |
58 | * and virtual alignment. If virthint is zero, a suitable virt | |
59 | * is chosen. In either case, align is not ignored. | |
60 | * | |
61 | * This routine returns NULL on failure. | |
62 | * | |
63 | * Memory allocated with prom_alloc can be freed with prom_free. | |
64 | * | |
65 | * The generic allocator is prom_malloc. | |
66 | * | |
67 | */ | |
68 | ||
69 | caddr_t | |
70 | prom_alloc(caddr_t virthint, size_t size, uint32_t align) | |
71 | { | |
72 | ||
73 | caddr_t virt = virthint; | |
74 | u_longlong_t physaddr; | |
75 | ||
76 | if (align == 0) | |
77 | align = (uint32_t)1; | |
78 | ||
79 | /* | |
80 | * First, allocate or claim the virtual address space. | |
81 | * In either case, after this code, "virt" is the chosen address. | |
82 | */ | |
83 | if (virthint == 0) { | |
84 | virt = prom_allocate_virt(align, size); | |
85 | if (virt == (caddr_t)-1) | |
86 | return ((caddr_t)0); | |
87 | } else { | |
88 | if (prom_claim_virt(size, virthint) == (caddr_t)-1) | |
89 | return ((caddr_t)0); | |
90 | } | |
91 | ||
92 | /* | |
93 | * Next, allocate the physical address space, at the specified | |
94 | * physical alignment (or 1 byte alignment, if none specified) | |
95 | */ | |
96 | ||
97 | if (prom_allocate_phys(size, align, &physaddr) == -1) { | |
98 | ||
99 | /* | |
100 | * Request failed, free virtual address space and return. | |
101 | */ | |
102 | prom_free_virt(size, virt); | |
103 | return ((caddr_t)0); | |
104 | } | |
105 | ||
106 | /* | |
107 | * Next, create a mapping from the physical to virtual address, | |
108 | * using a default "mode". | |
109 | */ | |
110 | ||
111 | if (prom_map_phys(-1, size, virt, physaddr) == -1) { | |
112 | ||
113 | /* | |
114 | * The call failed; release the physical and virtual | |
115 | * addresses allocated or claimed, and return. | |
116 | */ | |
117 | ||
118 | prom_free_virt(size, virt); | |
119 | prom_free_phys(size, physaddr); | |
120 | return ((caddr_t)0); | |
121 | } | |
122 | return (virt); | |
123 | } | |
124 | ||
125 | /* | |
126 | * This is the generic client interface to "claim" memory. | |
127 | * These two routines belong in the common directory. | |
128 | */ | |
129 | caddr_t | |
130 | prom_malloc(caddr_t virt, size_t size, uint32_t align) | |
131 | { | |
132 | cell_t ci[7]; | |
133 | int32_t rv; | |
134 | ||
135 | ci[0] = p1275_ptr2cell("claim"); /* Service name */ | |
136 | ci[1] = (cell_t)3; /* #argument cells */ | |
137 | ci[2] = (cell_t)1; /* #result cells */ | |
138 | ci[3] = p1275_ptr2cell(virt); /* Arg1: virt */ | |
139 | ci[4] = p1275_size2cell(size); /* Arg2: size */ | |
140 | ci[5] = p1275_uint2cell(align); /* Arg3: align */ | |
141 | ||
142 | rv = p1275_cif_handler(&ci); | |
143 | ||
144 | if (rv == 0) | |
145 | return ((caddr_t)p1275_cell2ptr(ci[6])); /* Res1: base */ | |
146 | return ((caddr_t)-1); | |
147 | } | |
148 | ||
149 | ||
150 | void | |
151 | prom_free(caddr_t virt, size_t size) | |
152 | { | |
153 | cell_t ci[5]; | |
154 | ||
155 | ci[0] = p1275_ptr2cell("release"); /* Service name */ | |
156 | ci[1] = (cell_t)2; /* #argument cells */ | |
157 | ci[2] = (cell_t)0; /* #result cells */ | |
158 | ci[3] = p1275_ptr2cell(virt); /* Arg1: virt */ | |
159 | ci[4] = p1275_size2cell(size); /* Arg2: size */ | |
160 | ||
161 | (void) p1275_cif_handler(&ci); | |
162 | } |