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| author | Wesley W. Terpstra <wesley@sifive.com> | 2017-03-23 19:11:44 -0700 |
|---|---|---|
| committer | Wesley W. Terpstra <wesley@sifive.com> | 2017-03-23 19:17:22 -0700 |
| commit | a1a5cbcacbbb43527fb6a4991ead1ae64cf18463 (patch) | |
| tree | ff7a3fc6d9969d19d125af3d4713f398c47c309e | |
| parent | fc1af65c1585b2a9ad1dd2cf1b50d552ee65c742 (diff) | |
| download | riscv-pk-a1a5cbcacbbb43527fb6a4991ead1ae64cf18463.zip riscv-pk-a1a5cbcacbbb43527fb6a4991ead1ae64cf18463.tar.gz riscv-pk-a1a5cbcacbbb43527fb6a4991ead1ae64cf18463.tar.bz2 | |
fdt: add a size method
| -rw-r--r-- | machine/fdt.c | 10 | ||||
| -rw-r--r-- | machine/fdt.h | 1 |
2 files changed, 11 insertions, 0 deletions
diff --git a/machine/fdt.c b/machine/fdt.c index f297e52..a040e87 100644 --- a/machine/fdt.c +++ b/machine/fdt.c @@ -68,6 +68,16 @@ void fdt_scan(uintptr_t fdt, fdt_cb cb, void *extra) fdt_scan_helper(lex, strings, "/", 0, cb, extra); } +uint32_t fdt_size(uintptr_t fdt) +{ + struct fdt_header *header = (struct fdt_header *)fdt; + + // Only process FDT that we understand + if (bswap(header->magic) != FDT_MAGIC || + bswap(header->last_comp_version) > FDT_VERSION) return 0; + return bswap(header->totalsize); +} + const uint32_t *fdt_get_address(const struct fdt_scan_node *node, const uint32_t *value, uintptr_t *result) { *result = 0; diff --git a/machine/fdt.h b/machine/fdt.h index 71726ce..8b01bc8 100644 --- a/machine/fdt.h +++ b/machine/fdt.h @@ -41,6 +41,7 @@ struct fdt_scan_prop { // Scan the contents of FDT typedef void (*fdt_cb)(const struct fdt_scan_prop *prop, void *extra); void fdt_scan(uintptr_t fdt, fdt_cb cb, void *extra); +uint32_t fdt_size(uintptr_t fdt); // Extract fields const uint32_t *fdt_get_address(const struct fdt_scan_node *node, const uint32_t *base, uintptr_t *value); |