CBMEM: Do not use get_top_of_ram() with DYNAMIC_CBMEM

The name was always obscure and confusing. Instead define cbmem_top()
directly in the chipset code for x86 like on ARMs.

TODO: Check TSEG alignment, it used for MTRR programming.

Change-Id: Ibbe5f05ab9c7d87d09caa673766cd17d192cd045
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7888
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/src/northbridge/intel/gm45/ram_calc.c b/src/northbridge/intel/gm45/ram_calc.c
index c8c15d3a76..d9d335709f 100644
--- a/src/northbridge/intel/gm45/ram_calc.c
+++ b/src/northbridge/intel/gm45/ram_calc.c
@@ -86,7 +86,7 @@ u32 decode_igd_gtt_size(const u32 gsm)
 	}
 }
 
-unsigned long get_top_of_ram(void)
+static uintptr_t smm_region_start(void)
 {
 	const pci_devfn_t dev = PCI_DEV(0, 0, 0);
 
@@ -105,3 +105,8 @@ unsigned long get_top_of_ram(void)
 	}
 	return tor;
 }
+
+void *cbmem_top(void)
+{
+	return (void *) smm_region_start();
+}