Intel e7505: provide get_top_of_ram

This is required to enable EARLY_CBMEM_INIT.

Change-Id: I6d8caf382aa48eded81c1e94bbbcd3975ea88a1a
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/2550
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/northbridge/intel/e7505/raminit.c

@@ -1889,6 +1889,12 @@ void e7505_mch_init(const struct mem_controller *memctrl)
 	sdram_enable(memctrl);
 }
 
+unsigned long get_top_of_ram(void)
+{
+	u32 tolm = (pci_read_config16(MCHDEV, TOLM) & ~0x7ff) << 16;
+	return (unsigned long) tolm;
+}
+
 /**
  * Scrub and reset error counts for ECC dimms.
  *

src/northbridge/intel/e7505/raminit.h

@@ -20,6 +20,7 @@ void e7505_mch_scrub_ecc(unsigned long ret_addr);
 void e7505_mch_done(const struct mem_controller *memctrl);
 int e7505_mch_is_ready(void);
 
+unsigned long get_top_of_ram(void);
 
 /* Mainboard exports this. */
 int spd_read_byte(unsigned device, unsigned address);