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authorWolfgang Denk <wd@denx.de>2007-04-18 17:47:39 +0200
committerWolfgang Denk <wd@denx.de>2007-04-18 17:47:39 +0200
commit5cca4092bd23d255ed304b8f76cd18ac11adb785 (patch)
tree0159b09bbed29dab7b44fc76fd54f8ce7906fec6 /libfdt/fdt_ro.c
parentfd094c6379e2ef8a4d0ceb5640b24cb0c8d04449 (diff)
parentf35a53fc7b0c79fcfe7bdc01163c4b34aaba1460 (diff)
downloadu-boot-imx-5cca4092bd23d255ed304b8f76cd18ac11adb785.zip
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Merge with /home/wd/git/u-boot/custodian/u-boot-fdt
Diffstat (limited to 'libfdt/fdt_ro.c')
-rw-r--r--libfdt/fdt_ro.c76
1 files changed, 74 insertions, 2 deletions
diff --git a/libfdt/fdt_ro.c b/libfdt/fdt_ro.c
index ce01dc7..af33336 100644
--- a/libfdt/fdt_ro.c
+++ b/libfdt/fdt_ro.c
@@ -25,7 +25,7 @@
#define CHECK_HEADER(fdt) { \
int err; \
- if ((err = _fdt_check_header(fdt)) != 0) \
+ if ((err = fdt_check_header(fdt)) != 0) \
return err; \
}
@@ -188,7 +188,7 @@ struct fdt_property *fdt_get_property(const void *fdt,
int offset, nextoffset;
int err;
- if ((err = _fdt_check_header(fdt)) != 0)
+ if ((err = fdt_check_header(fdt)) != 0)
goto fail;
err = -FDT_ERR_BADOFFSET;
@@ -329,3 +329,75 @@ uint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset, char **namep
return tag;
}
+
+/*
+ * Return the number of used reserve map entries and total slots available.
+ */
+int fdt_num_reservemap(void *fdt, int *used, int *total)
+{
+ struct fdt_reserve_entry *re;
+ int start;
+ int end;
+ int err = fdt_check_header(fdt);
+
+ if (err != 0)
+ return err;
+
+ start = fdt_off_mem_rsvmap(fdt);
+
+ /*
+ * Convention is that the reserve map is before the dt_struct,
+ * but it does not have to be.
+ */
+ end = fdt_totalsize(fdt);
+ if (end > fdt_off_dt_struct(fdt))
+ end = fdt_off_dt_struct(fdt);
+ if (end > fdt_off_dt_strings(fdt))
+ end = fdt_off_dt_strings(fdt);
+
+ /*
+ * Since the reserved area list is zero terminated, you get one fewer.
+ */
+ if (total)
+ *total = ((end - start) / sizeof(struct fdt_reserve_entry)) - 1;
+
+ if (used) {
+ *used = 0;
+ while (start < end) {
+ re = (struct fdt_reserve_entry *)(fdt + start);
+ if (re->size == 0)
+ return 0; /* zero size terminates the list */
+
+ *used += 1;
+ start += sizeof(struct fdt_reserve_entry);
+ }
+ /*
+ * If we get here, there was no zero size termination.
+ */
+ return -FDT_ERR_BADLAYOUT;
+ }
+ return 0;
+}
+
+/*
+ * Return the nth reserve map entry.
+ */
+int fdt_get_reservemap(void *fdt, int n, struct fdt_reserve_entry *re)
+{
+ int used;
+ int total;
+ int err;
+
+ err = fdt_num_reservemap(fdt, &used, &total);
+ if (err != 0)
+ return err;
+
+ if (n >= total)
+ return -FDT_ERR_NOSPACE;
+ if (re) {
+ *re = *(struct fdt_reserve_entry *)
+ _fdt_offset_ptr(fdt, n * sizeof(struct fdt_reserve_entry));
+ }
+ return 0;
+}
+