projects / mirror_edk2.git / blame
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|---|---|---|
| a0992390 PB |
1 | /*\r |
| 2 | * libfdt - Flat Device Tree manipulation\r | |
| 3 | * Copyright (C) 2014 David Gibson <david@gibson.dropbear.id.au>\r | |
| 4 | *\r | |
| 5 | * libfdt is dual licensed: you can use it either under the terms of\r | |
| 6 | * the GPL, or the BSD license, at your option.\r | |
| 7 | *\r | |
| 8 | * a) This library is free software; you can redistribute it and/or\r | |
| 9 | * modify it under the terms of the GNU General Public License as\r | |
| 10 | * published by the Free Software Foundation; either version 2 of the\r | |
| 11 | * License, or (at your option) any later version.\r | |
| 12 | *\r | |
| 13 | * This library is distributed in the hope that it will be useful,\r | |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of\r | |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r | |
| 16 | * GNU General Public License for more details.\r | |
| 17 | *\r | |
| 18 | * You should have received a copy of the GNU General Public\r | |
| 19 | * License along with this library; if not, write to the Free\r | |
| 20 | * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,\r | |
| 21 | * MA 02110-1301 USA\r | |
| 22 | *\r | |
| 23 | * Alternatively,\r | |
| 24 | *\r | |
| 25 | * b) Redistribution and use in source and binary forms, with or\r | |
| 26 | * without modification, are permitted provided that the following\r | |
| 27 | * conditions are met:\r | |
| 28 | *\r | |
| 29 | * 1. Redistributions of source code must retain the above\r | |
| 30 | * copyright notice, this list of conditions and the following\r | |
| 31 | * disclaimer.\r | |
| 32 | * 2. Redistributions in binary form must reproduce the above\r | |
| 33 | * copyright notice, this list of conditions and the following\r | |
| 34 | * disclaimer in the documentation and/or other materials\r | |
| 35 | * provided with the distribution.\r | |
| 36 | *\r | |
| 37 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND\r | |
| 38 | * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,\r | |
| 39 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF\r | |
| 40 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\r | |
| 41 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR\r | |
| 42 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\r | |
| 43 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT\r | |
| 44 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\r | |
| 45 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r | |
| 46 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r | |
| 47 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR\r | |
| 48 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,\r | |
| 49 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r | |
| 50 | */\r | |
| 51 | #include "libfdt_env.h"\r | |
| 52 | \r | |
| 53 | #include <fdt.h>\r | |
| 54 | #include <libfdt.h>\r | |
| 55 | \r | |
| 56 | #include "libfdt_internal.h"\r | |
| 57 | \r | |
| 58 | int fdt_address_cells(const void *fdt, int nodeoffset)\r | |
| 59 | {\r | |
| 60 | const fdt32_t *ac;\r | |
| 61 | int val;\r | |
| 62 | int len;\r | |
| 63 | \r | |
| 64 | ac = fdt_getprop(fdt, nodeoffset, "#address-cells", &len);\r | |
| 65 | if (!ac)\r | |
| 66 | return 2;\r | |
| 67 | \r | |
| 68 | if (len != sizeof(*ac))\r | |
| 69 | return -FDT_ERR_BADNCELLS;\r | |
| 70 | \r | |
| 71 | val = fdt32_to_cpu(*ac);\r | |
| 72 | if ((val <= 0) || (val > FDT_MAX_NCELLS))\r | |
| 73 | return -FDT_ERR_BADNCELLS;\r | |
| 74 | \r | |
| 75 | return val;\r | |
| 76 | }\r | |
| 77 | \r | |
| 78 | int fdt_size_cells(const void *fdt, int nodeoffset)\r | |
| 79 | {\r | |
| 80 | const fdt32_t *sc;\r | |
| 81 | int val;\r | |
| 82 | int len;\r | |
| 83 | \r | |
| 84 | sc = fdt_getprop(fdt, nodeoffset, "#size-cells", &len);\r | |
| 85 | if (!sc)\r | |
| 86 | return 2;\r | |
| 87 | \r | |
| 88 | if (len != sizeof(*sc))\r | |
| 89 | return -FDT_ERR_BADNCELLS;\r | |
| 90 | \r | |
| 91 | val = fdt32_to_cpu(*sc);\r | |
| 92 | if ((val < 0) || (val > FDT_MAX_NCELLS))\r | |
| 93 | return -FDT_ERR_BADNCELLS;\r | |
| 94 | \r | |
| 95 | return val;\r | |
| 96 | }\r |