diff options
Diffstat (limited to 'src/northbridge/intel/gm45')
| -rw-r--r-- | src/northbridge/intel/gm45/northbridge.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/northbridge/intel/gm45/northbridge.c b/src/northbridge/intel/gm45/northbridge.c index e14f843f9f..405eb5d324 100644 --- a/src/northbridge/intel/gm45/northbridge.c +++ b/src/northbridge/intel/gm45/northbridge.c @@ -13,6 +13,7 @@ * GNU General Public License for more details. */ +#include <cbmem.h> #include <console/console.h> #include <arch/io.h> #include <stdint.h> @@ -72,7 +73,7 @@ static int decode_pcie_bar(u32 *const base, u32 *const len) static void mch_domain_read_resources(struct device *dev) { u64 tom, touud; - u32 tomk, tolud, uma_sizek = 0; + u32 tomk, tolud, uma_sizek = 0, delta_cbmem; u32 pcie_config_base, pcie_config_size; /* Total Memory 2GB example: @@ -138,6 +139,15 @@ static void mch_domain_read_resources(struct device *dev) tomk -= tseg_sizek; uma_sizek += tseg_sizek; + /* cbmem_top can be shifted downwards due to alignment. + Mark the region between cbmem_top and tomk as unusable */ + delta_cbmem = tomk - ((uint32_t)cbmem_top() >> 10); + tomk -= delta_cbmem; + uma_sizek += delta_cbmem; + + printk(BIOS_DEBUG, "Unused RAM between cbmem_top and TOM: 0x%xK\n", + delta_cbmem); + printk(BIOS_INFO, "Available memory below 4GB: %uM\n", tomk >> 10); /* Report the memory regions */ |