diff options
author | Kumar Gala <galak@kernel.crashing.org> | 2007-11-28 10:21:12 -0600 |
---|---|---|
committer | Jon Loeliger <jdl@freescale.com> | 2007-12-04 07:26:47 -0600 |
commit | 2b7dc8dce549ad72ad437b254bf756d7ba4c2a5a (patch) | |
tree | 283f79de68c8ce5d2ee125780372eea046e7bcd2 | |
parent | 7c44c2f9cb1cc2df7aacd13decfc4e64b73d1730 (diff) | |
download | dtc-2b7dc8dce549ad72ad437b254bf756d7ba4c2a5a.tar.gz |
Add an option to pad the blob that is generated
There are times when we need extra space in the blob and just want
to have it added on w/o know the exact size to make it.
The padding and min size options are mutually exclusive.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
-rw-r--r-- | dtc.c | 14 | ||||
-rw-r--r-- | dtc.h | 1 | ||||
-rw-r--r-- | flattree.c | 20 |
3 files changed, 27 insertions, 8 deletions
@@ -29,6 +29,7 @@ int quiet; /* Level of quietness */ int reservenum; /* Number of memory reservation slots */ int minsize; /* Minimum blob size */ +int padsize; /* Additional padding to blob */ char *join_path(char *path, char *name) { @@ -97,6 +98,8 @@ static void __attribute__ ((noreturn)) usage(void) fprintf(stderr, "\t\tMake space for <number> reserve map entries (relevant for \n\t\tdtb and asm output only)\n"); fprintf(stderr, "\t-S <bytes>\n"); fprintf(stderr, "\t\tMake the blob at least <bytes> long (extra space)\n"); + fprintf(stderr, "\t-p <bytes>\n"); + fprintf(stderr, "\t\tAdd padding to the blob of <bytes> long (extra space)\n"); fprintf(stderr, "\t-b <number>\n"); fprintf(stderr, "\t\tSet the physical boot cpu\n"); fprintf(stderr, "\t-f\n"); @@ -124,8 +127,9 @@ int main(int argc, char *argv[]) quiet = 0; reservenum = 0; minsize = 0; + padsize = 0; - while ((opt = getopt(argc, argv, "hI:O:o:V:R:S:fcqb:v")) != EOF) { + while ((opt = getopt(argc, argv, "hI:O:o:V:R:S:p:fcqb:v")) != EOF) { switch (opt) { case 'I': inform = optarg; @@ -145,6 +149,9 @@ int main(int argc, char *argv[]) case 'S': minsize = strtol(optarg, NULL, 0); break; + case 'p': + padsize = strtol(optarg, NULL, 0); + break; case 'f': force = 1; break; @@ -173,6 +180,11 @@ int main(int argc, char *argv[]) else arg = argv[optind]; + /* minsize and padsize are mutually exclusive */ + if ((minsize) && (padsize)) { + die("Can't set both -p and -S\n"); + } + fprintf(stderr, "DTC: %s->%s on file \"%s\"\n", inform, outform, arg); @@ -43,6 +43,7 @@ extern int quiet; /* Level of quietness */ extern int reservenum; /* Number of memory reservation slots */ extern int minsize; /* Minimum blob size */ +extern int padsize; /* Additional padding to blob */ static inline void __attribute__((noreturn)) die(char * str, ...) { @@ -367,7 +367,7 @@ void dt_to_blob(FILE *f, struct boot_info *bi, int version, struct data dtbuf = empty_data; struct data strbuf = empty_data; struct fdt_header fdt; - int padlen; + int padlen = 0; for (i = 0; i < ARRAY_SIZE(version_table); i++) { if (version_table[i].version == version) @@ -388,16 +388,17 @@ void dt_to_blob(FILE *f, struct boot_info *bi, int version, /* * If the user asked for more space than is used, adjust the totalsize. */ - padlen = minsize - be32_to_cpu(fdt.totalsize); - if (padlen > 0) { - fdt.totalsize = cpu_to_be32(minsize); - } else { - if ((minsize > 0) && (quiet < 1)) + if (minsize > 0) { + padlen = minsize - be32_to_cpu(fdt.totalsize); + if ((padlen < 0) && (quiet < 1)) fprintf(stderr, "Warning: blob size %d >= minimum size %d\n", be32_to_cpu(fdt.totalsize), minsize); } + if (padsize > 0) + padlen = padsize; + /* * Assemble the blob: start with the header, add with alignment * the reserve buffer, add the reserve map terminating zeroes, @@ -414,8 +415,10 @@ void dt_to_blob(FILE *f, struct boot_info *bi, int version, * If the user asked for more space than is used, pad out the blob. */ if (padlen > 0) { + int tsize = be32_to_cpu(fdt.totalsize); + tsize += padlen; blob = data_append_zeroes(blob, padlen); - fdt.totalsize = cpu_to_be32(minsize); + fdt.totalsize = cpu_to_be32(tsize); } fwrite(blob.val, blob.len, 1, f); @@ -545,6 +548,9 @@ void dt_to_asm(FILE *f, struct boot_info *bi, int version, int boot_cpuid_phys) fprintf(f, "\t.space\t%d - (_%s_blob_end - _%s_blob_start), 0\n", minsize, symprefix, symprefix); } + if (padsize > 0) { + fprintf(f, "\t.space\t%d, 0\n", padsize); + } emit_label(f, symprefix, "blob_abs_end"); data_free(strbuf); |