diff options
| author | Subrata Banik <subrata.banik@intel.com> | 2016-10-13 18:05:04 +0530 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2016-10-16 02:49:57 +0200 |
| commit | 29f8708fca820797a088c7e81eb830fc61b21d28 (patch) | |
| tree | 3270ceaf7ae8223cdf6f82776642e141e7436216 /src/soc/intel/skylake/bootblock/pch.c | |
| parent | c68ab5e8e5fbbd84c80e10ad70313a45fc8ca4db (diff) | |
soc/intel/skylake: Enable HECI BAR for ME communication
This patch programs and enables BAR for ME (bus:0/
device:0x16/function:0) device to have early ME communication.
BUG=none
BRANCH=none
TEST=Verified Global Reset MEI message can able to perform platform
global reset during romstage.
Change-Id: I99ce0ccd42610112a361a48ba31168c9feaa0332
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/17016
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src/soc/intel/skylake/bootblock/pch.c')
| -rw-r--r-- | src/soc/intel/skylake/bootblock/pch.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/bootblock/pch.c b/src/soc/intel/skylake/bootblock/pch.c index 22ab1090b8..57b5fedb24 100644 --- a/src/soc/intel/skylake/bootblock/pch.c +++ b/src/soc/intel/skylake/bootblock/pch.c @@ -251,6 +251,27 @@ static void soc_config_rtc(void) B_PCH_PCR_RTC_CONF_UCMOS_EN); } +static void enable_heci(void) +{ + device_t dev = PCH_DEV_ME; + u8 pcireg; + + /* Assign Resources to HECI1 */ + /* Clear BIT 1-2 of Command Register */ + pcireg = pci_read_config8(dev, PCI_COMMAND); + pcireg &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY); + pci_write_config8(dev, PCI_COMMAND, pcireg); + + /* Program Temporary BAR for HECI1 */ + pci_write_config32(dev, PCI_BASE_ADDRESS_0, HECI1_BASE_ADDRESS); + pci_write_config32(dev, PCI_BASE_ADDRESS_1, 0x0); + + /* Enable Bus Master and MMIO Space */ + pcireg = pci_read_config8(dev, PCI_COMMAND); + pcireg |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY; + pci_write_config8(dev, PCI_COMMAND, pcireg); +} + void pch_early_init(void) { /* @@ -281,4 +302,6 @@ void pch_early_init(void) enable_smbus(); soc_config_rtc(); + + enable_heci(); } |