Rob Herring | 12869ec | 2019-06-21 08:18:32 -0600 | [diff] [blame] | 1 | // SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 2 | /* |
| 3 | * libfdt - Flat Device Tree manipulation |
| 4 | * Copyright (C) 2006 David Gibson, IBM Corporation. |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 5 | */ |
| 6 | #include "libfdt_env.h" |
| 7 | |
| 8 | #include <fdt.h> |
| 9 | #include <libfdt.h> |
| 10 | |
| 11 | #include "libfdt_internal.h" |
| 12 | |
Rob Herring | 6f05afc | 2017-01-04 10:45:20 -0600 | [diff] [blame] | 13 | int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset, |
| 14 | const char *name, int namelen, |
| 15 | uint32_t idx, const void *val, |
| 16 | int len) |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 17 | { |
| 18 | void *propval; |
| 19 | int proplen; |
| 20 | |
Rob Herring | 6f05afc | 2017-01-04 10:45:20 -0600 | [diff] [blame] | 21 | propval = fdt_getprop_namelen_w(fdt, nodeoffset, name, namelen, |
| 22 | &proplen); |
| 23 | if (!propval) |
| 24 | return proplen; |
| 25 | |
Rob Herring | 6e9c968 | 2020-10-12 09:58:15 -0500 | [diff] [blame] | 26 | if ((unsigned)proplen < (len + idx)) |
Rob Herring | 6f05afc | 2017-01-04 10:45:20 -0600 | [diff] [blame] | 27 | return -FDT_ERR_NOSPACE; |
| 28 | |
| 29 | memcpy((char *)propval + idx, val, len); |
| 30 | return 0; |
| 31 | } |
| 32 | |
| 33 | int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name, |
| 34 | const void *val, int len) |
| 35 | { |
| 36 | const void *propval; |
| 37 | int proplen; |
| 38 | |
| 39 | propval = fdt_getprop(fdt, nodeoffset, name, &proplen); |
Rob Herring | 4201d05 | 2017-10-03 11:37:04 -0500 | [diff] [blame] | 40 | if (!propval) |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 41 | return proplen; |
| 42 | |
| 43 | if (proplen != len) |
| 44 | return -FDT_ERR_NOSPACE; |
| 45 | |
Rob Herring | 6f05afc | 2017-01-04 10:45:20 -0600 | [diff] [blame] | 46 | return fdt_setprop_inplace_namelen_partial(fdt, nodeoffset, name, |
| 47 | strlen(name), 0, |
| 48 | val, len); |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 49 | } |
| 50 | |
Rob Herring | 9130ba8 | 2018-02-27 17:40:38 -0600 | [diff] [blame] | 51 | static void fdt_nop_region_(void *start, int len) |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 52 | { |
Rob Herring | 4760597 | 2015-04-29 16:00:05 -0500 | [diff] [blame] | 53 | fdt32_t *p; |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 54 | |
David Gibson | ed95d74 | 2008-08-07 12:24:17 +1000 | [diff] [blame] | 55 | for (p = start; (char *)p < ((char *)start + len); p++) |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 56 | *p = cpu_to_fdt32(FDT_NOP); |
| 57 | } |
| 58 | |
| 59 | int fdt_nop_property(void *fdt, int nodeoffset, const char *name) |
| 60 | { |
| 61 | struct fdt_property *prop; |
| 62 | int len; |
| 63 | |
| 64 | prop = fdt_get_property_w(fdt, nodeoffset, name, &len); |
Rob Herring | 4201d05 | 2017-10-03 11:37:04 -0500 | [diff] [blame] | 65 | if (!prop) |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 66 | return len; |
| 67 | |
Rob Herring | 9130ba8 | 2018-02-27 17:40:38 -0600 | [diff] [blame] | 68 | fdt_nop_region_(prop, len + sizeof(*prop)); |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 69 | |
| 70 | return 0; |
| 71 | } |
| 72 | |
Rob Herring | 9130ba8 | 2018-02-27 17:40:38 -0600 | [diff] [blame] | 73 | int fdt_node_end_offset_(void *fdt, int offset) |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 74 | { |
Stephen Warren | cd29672 | 2012-09-28 21:25:59 +0000 | [diff] [blame] | 75 | int depth = 0; |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 76 | |
Stephen Warren | cd29672 | 2012-09-28 21:25:59 +0000 | [diff] [blame] | 77 | while ((offset >= 0) && (depth >= 0)) |
| 78 | offset = fdt_next_node(fdt, offset, &depth); |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 79 | |
Stephen Warren | cd29672 | 2012-09-28 21:25:59 +0000 | [diff] [blame] | 80 | return offset; |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | int fdt_nop_node(void *fdt, int nodeoffset) |
| 84 | { |
| 85 | int endoffset; |
| 86 | |
Rob Herring | 9130ba8 | 2018-02-27 17:40:38 -0600 | [diff] [blame] | 87 | endoffset = fdt_node_end_offset_(fdt, nodeoffset); |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 88 | if (endoffset < 0) |
| 89 | return endoffset; |
| 90 | |
Rob Herring | 9130ba8 | 2018-02-27 17:40:38 -0600 | [diff] [blame] | 91 | fdt_nop_region_(fdt_offset_ptr_w(fdt, nodeoffset, 0), |
David Gibson | ed95d74 | 2008-08-07 12:24:17 +1000 | [diff] [blame] | 92 | endoffset - nodeoffset); |
David Gibson | 1cade99 | 2007-12-10 14:28:39 +1100 | [diff] [blame] | 93 | return 0; |
| 94 | } |