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nb/intel/gm45/igd: Hide IGD while disabling

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Hide the IGD to make sure ramstage doesn't detect it.

Change-Id: If389016f3bb0c4c2fd0b826914997a87a9137201
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/18194
Tested-by: build bot (Jenkins)
Reviewed-by: Nico Huber <nico.h@gmx.de>
This commit is contained in:
Patrick Rudolph
2017-01-21 10:43:52 +01:00
committed by Martin Roth
parent a5c2ac6256
commit bb1af99622
1 changed files with 5 additions and 0 deletions
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5
src/northbridge/intel/gm45/igd.c
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@@ -127,6 +127,11 @@ static void disable_igd(const sysinfo_t *const sysinfo)
MCHBAR16(0x119e) = (MCHBAR16(0x119e) & ~(7 << 13)) | (4 << 13);
MCHBAR16(0x119e) |= (1 << 12);
}
/* Hide IGD. */
u32 deven = pci_read_config32(mch_dev, D0F0_DEVEN);
deven &= ~(3 << 3);
pci_write_config32(mch_dev, D0F0_DEVEN, deven);
}
void init_igd(const sysinfo_t *const sysinfo)