Change in coreboot[master]: soc/intel/cannonlake: Set IGD stolen memory size to 64MB

[Subrata Banik (Code Review)]

Subrata Banik has uploaded this change for review. ( https://review.coreboot.org/21341

Change subject: soc/intel/cannonlake: Set IGD stolen memory size to 64MB
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soc/intel/cannonlake: Set IGD stolen memory size to 64MB

This patch to override default FSP IGD stolen memory size
UPD value which ease the hardware register based CNL memory
layout calculation.

TEST=Ensures FSP-M UPD "IgdDvmt50PreAlloc" value is 0x2 (64MB)

Change-Id: I63d992e139810ad203137b34c98d1a463f88b92d
Signed-off-by: Subrata Banik 
---
M src/soc/intel/cannonlake/romstage/romstage.c
1 file changed, 2 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/41/21341/1

diff --git a/src/soc/intel/cannonlake/romstage/romstage.c b/src/soc/intel/cannonlake/romstage/romstage.c
index 483f44b..a9ad1d8 100644
--- a/src/soc/intel/cannonlake/romstage/romstage.c
+++ b/src/soc/intel/cannonlake/romstage/romstage.c
@@ -71,6 +71,8 @@
    unsigned int i;
    uint32_t mask = 0;

+	/* Set IGD stolen size to 64MB. */
+	m_cfg->IgdDvmt50PreAlloc = 2;
    m_cfg->TsegSize = CONFIG_SMM_TSEG_SIZE;
    m_cfg->IedSize = CONFIG_IED_REGION_SIZE;
    m_cfg->SaGv = config->SaGv;