Kyösti Mälkki (kyosti.malkki@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3513
-gerrit
commit 4c8ae00520bed65aa2eca7d8a069accfde983e0e Author: Kyösti Mälkki kyosti.malkki@gmail.com Date: Fri Jun 21 15:37:55 2013 +0300
intel/sandybridge: Locate CBMEM TOC early in ramstage
This patch allows the use of migrated CAR_GLOBAL variables from the very beginning of ramstage. Without the patch, CAR_GLOBALS were not available until northbridge set_resources().
Change-Id: Ifd4ab2ed52e07dcbe8c77e2e460dc483323e93c0 Signed-off-by: Kyösti Mälkki kyosti.malkki@gmail.com --- src/northbridge/intel/sandybridge/northbridge.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/src/northbridge/intel/sandybridge/northbridge.c b/src/northbridge/intel/sandybridge/northbridge.c index 0a413b4..d8e2e9d 100644 --- a/src/northbridge/intel/sandybridge/northbridge.c +++ b/src/northbridge/intel/sandybridge/northbridge.c @@ -51,6 +51,21 @@ int bridge_silicon_revision(void) return bridge_revision_id; }
+static unsigned long get_top_of_ram(void) +{ + /* Base of TSEG is top of usable DRAM */ + u32 tom = pci_read_config32(dev_find_slot(0, PCI_DEVFN(0,0)), TSEG); + return (unsigned long) tom; +} + +struct cbmem_entry *get_cbmem_toc(void) +{ + static struct cbmem_entry *toc = NULL; + if (!toc) + toc = (struct cbmem_entry *)(get_top_of_ram() - HIGH_MEMORY_SIZE); + return toc; +} + /* Reserve everything between A segment and 1MB: * * 0xa0000 - 0xbffff: legacy VGA