fdt_addr_t end;
};
+struct bd_info;
+
#ifdef CONFIG_SPL_BUILD
#define SPL_BUILD 1
#else
#define SPL_BUILD 0
#endif
+#if CONFIG_IS_ENABLED(OF_PRIOR_STAGE)
+extern phys_addr_t prior_stage_fdt_address;
+#endif
+
/*
* Information about a resource. start is the first address of the resource
* and end is the last address (inclusive). The length of the resource will
struct display_timing *config);
/**
- * fdtdec_setup_memory_size() - decode and setup gd->ram_size
+ * fdtdec_setup_mem_size_base() - decode and setup gd->ram_size and
+ * gd->ram_start
*
- * Decode the /memory 'reg' property to determine the size of the first memory
- * bank, populate the global data with the size of the first bank of memory.
+ * 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 instead of
- * hard coding the value in the case where the memory size cannot be detected
- * automatically.
+ * 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.
*
* @return 0 if OK, -EINVAL if the /memory node or reg property is missing or
* invalid
*/
-int fdtdec_setup_memory_size(void);
+int fdtdec_setup_mem_size_base(void);
/**
* fdtdec_setup_memory_banksize() - decode and populate gd->bd->bi_dram
* Called when CONFIG_OF_BOARD is defined, or if CONFIG_OF_SEPARATE is defined
* and the board implements it.
*/
-void *board_fdt_blob_setup(void);
+
+/*
+ * Decode the size of memory
+ *
+ * RAM size is normally set in a /memory node and consists of a list of
+ * (base, size) cells in the 'reg' property. This information is used to
+ * determine the total available memory as well as the address and size
+ * of each bank.
+ *
+ * Optionally the memory configuration can vary depending on a board id,
+ * typically read from strapping resistors or an EEPROM on the board.
+ *
+ * Finally, memory size can be detected (within certain limits) by probing
+ * the available memory. It is safe to do so within the limits provides by
+ * the board's device tree information. This makes it possible to produce
+ * boards with different memory sizes, where the device tree specifies the
+ * maximum memory configuration, and the smaller memory configuration is
+ * probed.
+ *
+ * This function decodes that information, returning the memory base address,
+ * size and bank information. See the memory.txt binding for full
+ * documentation.
+ *
+ * @param blob Device tree blob
+ * @param area Name of node to check (NULL means "/memory")
+ * @param board_id Board ID to look up
+ * @param basep Returns base address of first memory bank (NULL to
+ * ignore)
+ * @param sizep Returns total memory size (NULL to ignore)
+ * @param bd Updated with the memory bank information (NULL to skip)
+ * @return 0 if OK, -ve on error
+ */
+int fdtdec_decode_ram_size(const void *blob, const char *area, int board_id,
+ phys_addr_t *basep, phys_size_t *sizep,
+ struct bd_info *bd);
#endif