New patch to review for coreboot: 049c4e5 haswell: cbmem_get_table_location() implementation

[Stefan Reinauer]

Stefan Reinauer ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2798

-gerrit

commit 049c4e5c6cff3bca43d1aea8818076bd50f1de56
Author: Aaron Durbin 
Date:   Tue Feb 12 00:46:17 2013 -0600

haswell: cbmem_get_table_location() implementation

Provide the implemenation of cbmem_get_table_location() so that
    cbmem can be initialized early in ramstage when CONFIG_EARLY_CBMEM_INIT
    is enabled. The cbmem tables are located just below the TSEG region.

Change-Id: Ia160ac6aff583fc52bf403d047529aaa07088085
    Signed-off-by: Aaron Durbin 
---
 src/northbridge/intel/haswell/northbridge.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/src/northbridge/intel/haswell/northbridge.c b/src/northbridge/intel/haswell/northbridge.c
index c8c1704..23bbd29 100644
--- a/src/northbridge/intel/haswell/northbridge.c
+++ b/src/northbridge/intel/haswell/northbridge.c
@@ -418,10 +418,6 @@ static void mc_add_dram_resources(device_t dev)
    mmio_resource(dev, index++, CONFIG_CHROMEOS_RAMOOPS_RAM_START >> 10,
    		CONFIG_CHROMEOS_RAMOOPS_RAM_SIZE >> 10);
 #endif
-
-	/* Leave some space for ACPI, PIRQ and MP tables */
-	high_tables_size = HIGH_MEMORY_SIZE;
-	high_tables_base = mc_values[TSEG_REG] - high_tables_size;
 }

static void mc_read_resources(device_t dev)
@@ -546,6 +542,21 @@ static void northbridge_init(struct device *dev)
    MCHBAR32(0x5500) = 0x00100001;
 }

+#if CONFIG_EARLY_CBMEM_INIT
+int cbmem_get_table_location(uint64_t *tables_base, uint64_t *tables_size)
+{
+	uint32_t tseg;
+
+	/* Put the CBMEM location just below TSEG. */
+	*tables_size = HIGH_MEMORY_SIZE;
+	tseg = (pci_read_config32(dev_find_slot(0, PCI_DEVFN(0, 0)),
+	                          TSEG) & ~((1 << 20) - 1)) - HIGH_MEMORY_SIZE;
+	*tables_base = tseg;
+
+	return 0;
+}
+#endif
+
 static void northbridge_enable(device_t dev)
 {
 #if CONFIG_HAVE_ACPI_RESUME