@@ -909,6 +909,28 @@ int fdtdec_decode_display_timing(const void *blob, int node, int index,
struct display_timing *config);
/**
+ * fdtdec_get_mem_size_base() - decode FDT to get ram size and base
+ *
+ * Decode the /memory 'reg' property to determine the size and start of the
+ * first memory bank, populate the global data with the size and start of the
+ * first bank of memory.
+ *
+ * This function should be called from a boards dram_init(). This helper
+ * function allows for boards to query the device tree for DRAM size and start
+ * address instead of hard coding the value in the case where the memory size
+ * and start address cannot be detected automatically.
+ *
+ * @param blob FDT blob
+ * @param ram_size buffer to hold the ram size to set
+ * @param ram_base buffer to hold the ram base to set
+ *
+ * @return 0 if OK, -EINVAL if the /memory node or reg property is missing or
+ * invalid
+ */
+int fdtdec_get_mem_size_base(const void *blob,
+ phys_size_t *ram_size, unsigned long *ram_base);
+
+/**
* fdtdec_setup_mem_size_base_fdt() - decode and setup gd->ram_size and
* gd->ram_start
*
@@ -1030,6 +1030,30 @@ int fdtdec_decode_display_timing(const void *blob, int parent, int index,
return ret;
}
+int fdtdec_get_mem_size_base(const void *blob,
+ phys_size_t *ram_size, unsigned long *ram_base)
+{
+ int ret, mem;
+ struct fdt_resource res;
+
+ mem = fdt_path_offset(blob, "/memory");
+ if (mem < 0) {
+ debug("%s: Missing /memory node\n", __func__);
+ return -EINVAL;
+ }
+
+ ret = fdt_get_resource(blob, mem, "reg", 0, &res);
+ if (ret != 0) {
+ debug("%s: Unable to decode first memory bank\n", __func__);
+ return -EINVAL;
+ }
+
+ *ram_size = (phys_size_t)(res.end - res.start + 1);
+ *ram_base = (unsigned long)res.start;
+
+ return 0;
+}
+
int fdtdec_setup_mem_size_base_fdt(const void *blob)
{
int ret, mem;