| 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 | } |