tequilaOS/platform_external_dtc
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Add an option to pad the blob that is generated

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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>
This commit is contained in:
Kumar Gala 2007-11-28 10:21:12 -06:00 committed by Jon Loeliger
parent 7c44c2f9cb
commit 2b7dc8dce5
3 changed files with 27 additions and 8 deletions
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14
dtc.c
View file

@ -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);

1
dtc.h
View file

@ -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, ...)
{

20
flattree.c
View file

@ -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);