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Differential D13968 Diff 38358 head/stand/fdt/fdt_loader_cmd.c

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head/stand/fdt/fdt_loader_cmd.c

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/* Size of FDT blob */ /* Size of FDT blob */
static size_t fdtp_size = 0; static size_t fdtp_size = 0;
/* Location of FDT in kernel or module. */ /* Location of FDT in kernel or module. */
/* This won't be set if FDT is loaded from disk or memory. */ /* This won't be set if FDT is loaded from disk or memory. */
/* If it is set, we'll update it when fdt_copy() gets called. */ /* If it is set, we'll update it when fdt_copy() gets called. */
static vm_offset_t fdtp_va = 0; static vm_offset_t fdtp_va = 0;
static int fdt_load_dtb(vm_offset_t va); static int fdt_load_dtb(vm_offset_t va);
static void fdt_print_overlay_load_error(int err, const char *filename);
static int fdt_cmd_nyi(int argc, char *argv[]); static int fdt_cmd_nyi(int argc, char *argv[]);
static int fdt_cmd_addr(int argc, char *argv[]); static int fdt_cmd_addr(int argc, char *argv[]);
static int fdt_cmd_mkprop(int argc, char *argv[]); static int fdt_cmd_mkprop(int argc, char *argv[]);
static int fdt_cmd_cd(int argc, char *argv[]); static int fdt_cmd_cd(int argc, char *argv[]);
static int fdt_cmd_hdr(int argc, char *argv[]); static int fdt_cmd_hdr(int argc, char *argv[]);
static int fdt_cmd_ls(int argc, char *argv[]); static int fdt_cmd_ls(int argc, char *argv[]);
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fdt_load_dtb_overlay(const char * filename) fdt_load_dtb_overlay(const char * filename)
{ {
struct preloaded_file *bfp; struct preloaded_file *bfp;
struct fdt_header header; struct fdt_header header;
int err; int err;
debugf("fdt_load_dtb_overlay(%s)\n", filename); debugf("fdt_load_dtb_overlay(%s)\n", filename);
/* Attempt to load and validate a new dtb from a file. */ /* Attempt to load and validate a new dtb from a file. FDT_ERR_NOTFOUND
if ((bfp = file_loadraw(filename, "dtbo", 1)) == NULL) { * is normally a libfdt error code, but libfdt would actually return
printf("failed to load file '%s'\n", filename); * -FDT_ERR_NOTFOUND. We re-purpose the error code here to convey a
return (1); * similar meaning: the file itself was not found, which can still be
} * considered an error dealing with FDT pieces.
*/
if ((bfp = file_loadraw(filename, "dtbo", 1)) == NULL)
return (FDT_ERR_NOTFOUND);
COPYOUT(bfp->f_addr, &header, sizeof(header)); COPYOUT(bfp->f_addr, &header, sizeof(header));
err = fdt_check_header(&header); err = fdt_check_header(&header);
if (err < 0) { if (err < 0) {
file_discard(bfp); file_discard(bfp);
if (err == -FDT_ERR_BADVERSION) return (err);
printf("incompatible blob version: %d, should be: %d\n",
fdt_version(fdtp), FDT_LAST_SUPPORTED_VERSION);
else
printf("error validating blob: %s\n",
fdt_strerror(err));
return (1);
} }
return (0); return (0);
} }
static void
fdt_print_overlay_load_error(int err, const char *filename)
{
switch (err) {
case FDT_ERR_NOTFOUND:
printf("%s: failed to load file\n", filename);
break;
case -FDT_ERR_BADVERSION:
printf("%s: incompatible blob version: %d, should be: %d\n",
filename, fdt_version(fdtp),
FDT_LAST_SUPPORTED_VERSION);
break;
default:
/* libfdt errs are negative */
if (err < 0)
printf("%s: error validating blob: %s\n",
filename, fdt_strerror(err));
else
printf("%s: unknown load error\n", filename);
break;
}
}
int int
fdt_load_dtb_overlays(const char * filenames) fdt_load_dtb_overlays(const char * filenames)
{ {
char *names; char *names;
char *name; char *name, *name_ext;
char *comaptr; char *comaptr;
int err, namesz;
debugf("fdt_load_dtb_overlay(%s)\n", filenames); debugf("fdt_load_dtb_overlay(%s)\n", filenames);
names = strdup(filenames); names = strdup(filenames);
if (names == NULL) if (names == NULL)
return (1); return (1);
name = names; name = names;
do { do {
comaptr = strchr(name, ','); comaptr = strchr(name, ',');
if (comaptr) if (comaptr)
*comaptr = '\0'; *comaptr = '\0';
fdt_load_dtb_overlay(name); err = fdt_load_dtb_overlay(name);
if (err == FDT_ERR_NOTFOUND) {
/* Allocate enough to append ".dtbo" */
namesz = strlen(name) + 6;
name_ext = malloc(namesz);
if (name_ext == NULL) {
fdt_print_overlay_load_error(err, name);
name = comaptr + 1;
continue;
}
snprintf(name_ext, namesz, "%s.dtbo", name);
err = fdt_load_dtb_overlay(name_ext);
free(name_ext);
}
/* Catch error with either initial load or fallback load */
if (err != 0)
fdt_print_overlay_load_error(err, name);
name = comaptr + 1; name = comaptr + 1;
} while(comaptr); } while(comaptr);
free(names); free(names);
return (0); return (0);
} }
void void
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