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108 lines
2.4 KiB
108 lines
2.4 KiB
/* |
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* libfdt - Flat Device Tree manipulation |
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* Copyright (C) 2006 David Gibson, IBM Corporation. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public License |
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* as published by the Free Software Foundation; either version 2.1 of |
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* the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libfdt_env.h" |
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#include <fdt.h> |
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#include <libfdt.h> |
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#include "libfdt_internal.h" |
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int fdt_setprop_inplace(struct fdt_header *fdt, int nodeoffset, const char *name, |
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const void *val, int len) |
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{ |
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void *propval; |
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int proplen; |
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int err; |
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propval = fdt_getprop(fdt, nodeoffset, name, &proplen); |
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if ((err = fdt_ptr_error(propval))) |
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return err; |
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if (proplen != len) |
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return FDT_ERR_SIZE_MISMATCH; |
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memcpy(propval, val, len); |
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return 0; |
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} |
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static void nop_region(void *start, int len) |
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{ |
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uint32_t *p; |
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for (p = start; (void *)p < (start + len); p++) |
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*p = FDT_NOP; |
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} |
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int fdt_nop_property(struct fdt_header *fdt, int nodeoffset, const char *name) |
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{ |
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struct fdt_property *prop; |
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int len; |
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int err; |
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prop = _fdt_getprop(fdt, nodeoffset, name, &len); |
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if ((err = fdt_ptr_error(prop))) |
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return err; |
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nop_region(prop, len + sizeof(*prop)); |
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return 0; |
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} |
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int fdt_nop_node(struct fdt_header *fdt, int nodeoffset) |
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{ |
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int level = 0; |
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int err = 0; |
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uint32_t tag; |
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int offset, nextoffset; |
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tag = _fdt_next_tag(fdt, nodeoffset, &nextoffset); |
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if (tag != FDT_BEGIN_NODE) |
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return FDT_ERR_BADOFFSET; |
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do { |
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offset = nextoffset; |
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tag = _fdt_next_tag(fdt, offset, &nextoffset); |
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switch (tag) { |
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case FDT_END: |
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level = -1; |
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err = FDT_ERR_TRUNCATED; |
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break; |
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case FDT_BEGIN_NODE: |
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level++; |
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break; |
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case FDT_END_NODE: |
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level--; |
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break; |
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case FDT_PROP: |
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case FDT_NOP: |
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break; |
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default: |
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return FDT_ERR_BADSTRUCTURE; |
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} |
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} while (level >= 0); |
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nop_region(fdt_offset_ptr(fdt, nodeoffset, 0), nextoffset - nodeoffset); |
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return err; |
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}
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