diff options
Diffstat (limited to 'kexec/arch/ppc/kexec-ppc.c')
| -rw-r--r-- | kexec/arch/ppc/kexec-ppc.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/kexec/arch/ppc/kexec-ppc.c b/kexec/arch/ppc/kexec-ppc.c index d046110..03bec36 100644 --- a/kexec/arch/ppc/kexec-ppc.c +++ b/kexec/arch/ppc/kexec-ppc.c @@ -423,6 +423,30 @@ err_out: return -1; } +/* Return 0 if fname/value valid, -1 otherwise */ +int get_devtree_value(const char *fname, unsigned long long *value) +{ + FILE *file; + char buf[MAXBYTES]; + int n = -1; + + if ((file = fopen(fname, "r"))) { + n = fread(buf, 1, MAXBYTES, file); + fclose(file); + } + + if (n == sizeof(uint32_t)) + *value = ((uint32_t *)buf)[0]; + else if (n == sizeof(uint64_t)) + *value = ((uint64_t *)buf)[0]; + else { + fprintf(stderr, "%s node has invalid size: %d\n", fname, n); + return -1; + } + + return 0; +} + /* Get devtree details and create exclude_range array * Also create usablemem_ranges for KEXEC_ON_CRASH */ |