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libfdt: Sequential write support

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This patch adds code to libfdt to create flat trees from scratch, writing
sequentially.
This commit is contained in:
David Gibson 2006-11-29 16:45:46 +11:00
parent 3aa4cfd66b
commit 063693a9e4
10 changed files with 386 additions and 11 deletions
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22
fdt_ro.c
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@ -25,12 +25,24 @@
static int check_header(const struct fdt_header *fdt)
{
if (fdt32_to_cpu(fdt->magic) != FDT_MAGIC)
uint32_t magic = fdt32_to_cpu(fdt->magic);
uint32_t version = fdt32_to_cpu(fdt->version);
uint32_t last_comp_version = fdt32_to_cpu(fdt->last_comp_version);
if (magic == FDT_MAGIC) {
/* Complete tree */
if (version < FDT_FIRST_SUPPORTED_VERSION)
return FDT_ERR_BADVERSION;
if (last_comp_version > FDT_LAST_SUPPORTED_VERSION)
return FDT_ERR_BADVERSION;
} else if (magic == SW_MAGIC) {
/* Unfinished sequential-write blob */
if (SW_SIZE_DT_STRUCT(fdt) == 0)
return FDT_ERR_BADSTATE;
} else {
return FDT_ERR_BADMAGIC;
if (fdt32_to_cpu(fdt->version) < FDT_FIRST_SUPPORTED_VERSION)
return FDT_ERR_BADVERSION;
if (fdt32_to_cpu(fdt->last_comp_version) > FDT_LAST_SUPPORTED_VERSION)
return FDT_ERR_BADVERSION;
}
return 0;
}