diff options
Diffstat (limited to 'EmbeddedPkg/Library/FdtLib/fdt_sw.c')
| -rw-r--r-- | EmbeddedPkg/Library/FdtLib/fdt_sw.c | 48 |
1 files changed, 46 insertions, 2 deletions
diff --git a/EmbeddedPkg/Library/FdtLib/fdt_sw.c b/EmbeddedPkg/Library/FdtLib/fdt_sw.c index 991919b436..3c2c710186 100644 --- a/EmbeddedPkg/Library/FdtLib/fdt_sw.c +++ b/EmbeddedPkg/Library/FdtLib/fdt_sw.c @@ -107,6 +107,38 @@ int fdt_create(void *buf, int bufsize) return 0;
}
+int fdt_resize(void *fdt, void *buf, int bufsize)
+{
+ size_t headsize, tailsize;
+ char *oldtail, *newtail;
+
+ FDT_SW_CHECK_HEADER(fdt);
+
+ headsize = fdt_off_dt_struct(fdt);
+ tailsize = fdt_size_dt_strings(fdt);
+
+ if ((headsize + tailsize) > bufsize)
+ return -FDT_ERR_NOSPACE;
+
+ oldtail = (char *)fdt + fdt_totalsize(fdt) - tailsize;
+ newtail = (char *)buf + bufsize - tailsize;
+
+ /* Two cases to avoid clobbering data if the old and new
+ * buffers partially overlap */
+ if (buf <= fdt) {
+ memmove(buf, fdt, headsize);
+ memmove(newtail, oldtail, tailsize);
+ } else {
+ memmove(newtail, oldtail, tailsize);
+ memmove(buf, fdt, headsize);
+ }
+
+ fdt_set_off_dt_strings(buf, bufsize);
+ fdt_set_totalsize(buf, bufsize);
+
+ return 0;
+}
+
int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size)
{
struct fdt_reserve_entry *re;
@@ -188,7 +220,7 @@ static int _fdt_find_add_string(void *fdt, const char *s) return offset;
}
-int fdt_property(void *fdt, const char *name, const void *val, int len)
+int fdt_property_placeholder(void *fdt, const char *name, int len, void **valp)
{
struct fdt_property *prop;
int nameoff;
@@ -206,7 +238,19 @@ int fdt_property(void *fdt, const char *name, const void *val, int len) prop->tag = cpu_to_fdt32(FDT_PROP);
prop->nameoff = cpu_to_fdt32(nameoff);
prop->len = cpu_to_fdt32(len);
- memcpy(prop->data, val, len);
+ *valp = prop->data;
+ return 0;
+}
+
+int fdt_property(void *fdt, const char *name, const void *val, int len)
+{
+ void *ptr;
+ int ret;
+
+ ret = fdt_property_placeholder(fdt, name, len, &ptr);
+ if (ret)
+ return ret;
+ memcpy(ptr, val, len);
return 0;
}
|