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authorSimon Glass <sjg@chromium.org>2014-10-23 18:58:56 -0600
committerSimon Glass <sjg@chromium.org>2014-11-21 04:43:18 +0100
commit2640387148ad5e0197a8ac80c24f3473dee42a65 (patch)
treebb174337344044010875651980e4562dacad08a1 /include/fdtdec.h
parent41f09bbe594aac18fea208423494729d52b85eee (diff)
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fdt: Add a function to decode a named memory region
Permit decoding of a named memory region from the device tree. This allows easy run-time configuration of the address of on-chip SRAM, SDRAM, etc. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'include/fdtdec.h')
-rw-r--r--include/fdtdec.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 1a931e8..a7655dc 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -677,4 +677,31 @@ int fdt_get_named_resource(const void *fdt, int node, const char *property,
*/
int fdtdec_pci_get_bdf(const void *fdt, int node, int *bdf);
+/**
+ * Decode a named region within a memory bank of a given type.
+ *
+ * This function handles selection of a memory region. The region is
+ * specified as an offset/size within a particular type of memory.
+ *
+ * The properties used are:
+ *
+ * <mem_type>-memory<suffix> for the name of the memory bank
+ * <mem_type>-offset<suffix> for the offset in that bank
+ *
+ * The property value must have an offset and a size. The function checks
+ * that the region is entirely within the memory bank.5
+ *
+ * @param blob FDT blob
+ * @param node Node containing the properties (-1 for /config)
+ * @param mem_type Type of memory to use, which is a name, such as
+ * "u-boot" or "kernel".
+ * @param suffix String to append to the memory/offset
+ * property names
+ * @param basep Returns base of region
+ * @param sizep Returns size of region
+ * @return 0 if OK, -ive on error
+ */
+int fdtdec_decode_memory_region(const void *blob, int node,
+ const char *mem_type, const char *suffix,
+ fdt_addr_t *basep, fdt_size_t *sizep);
#endif