| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2013 Vladimir Serbinenko. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #define __SIMPLE_DEVICE__ |
| |
| #include <arch/io.h> |
| #include <cbmem.h> |
| #include "nehalem.h" |
| |
| static uintptr_t smm_region_start(void) |
| { |
| /* Base of TSEG is top of usable DRAM */ |
| uintptr_t tom = pci_read_config32(PCI_DEV(0,0,0), TSEG); |
| return tom; |
| } |
| |
| void *cbmem_top(void) |
| { |
| return (void *) smm_region_start(); |
| } |