diff options
| author | praveen hodagatta pranesh <praveenx.hodagatta.pranesh@intel.com> | 2017-12-09 00:51:21 +0800 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2017-12-13 02:19:54 +0000 |
| commit | d6dffdc1faa4ba97bd5d592997eb32d25ba54f7a (patch) | |
| tree | 3f6fc89dff19d19b59b8a8104fbb268895ee31c9 /src/soc | |
| parent | ac9d6b8c739939c45400a55c60f2104ba4eb5e5a (diff) | |
soc/intel/skylake: Enable LPC IO Decoding on PCR
According to the PCH BIOS Spec (Doc#549921/Rev-2.3.4),
section 2.5.1.6, it is a requirement to program the same
value programmed in LPC "PCI offset 82h" into "PCR[DMI]+2774h"
to fully enable the Lpc IO enable decoding which is missing in
current source.
Without above changes, Skylake Saddlebrook platform with a
SIO does not boot.
Change-Id: Ief26e2718325b9d74ea0f83d47d2f917e0972173
Signed-off-by: praveen <praveenx.hodagatta.pranesh@intel.com>
Reviewed-on: https://review.coreboot.org/22819
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/skylake/lpc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/lpc.c b/src/soc/intel/skylake/lpc.c index bd6fbc4542..9cd450b862 100644 --- a/src/soc/intel/skylake/lpc.c +++ b/src/soc/intel/skylake/lpc.c @@ -31,6 +31,7 @@ #include <reg_script.h> #include <soc/iomap.h> #include <soc/pcr_ids.h> +#include <soc/intel/common/block/lpc/lpc_def.h> /** PCH preserved MMIO range, 24 MB, from 0xFD000000 to 0xFE7FFFFF @@ -81,11 +82,17 @@ void soc_get_gen_io_dec_range(const struct device *dev, uint32_t *gen_io_dec) void soc_setup_dmi_pcr_io_dec(uint32_t *gen_io_dec) { + uint16_t lpc_en; + /* Mirror these same settings in DMI PCR */ pcr_write32(PID_DMI, PCR_DMI_LPCLGIR1, gen_io_dec[0]); pcr_write32(PID_DMI, PCR_DMI_LPCLGIR2, gen_io_dec[1]); pcr_write32(PID_DMI, PCR_DMI_LPCLGIR3, gen_io_dec[2]); pcr_write32(PID_DMI, PCR_DMI_LPCLGIR4, gen_io_dec[3]); + + /* LPC IO Decode Enable */ + lpc_en = pci_read_config16(PCH_DEV_LPC, LPC_IO_ENABLES); + pcr_write16(PID_DMI, PCR_DMI_LPCIOE, lpc_en); } static const struct reg_script pch_misc_init_script[] = { |