diff options
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/intel/sandybridge/raminit_mrc.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/northbridge/intel/sandybridge/raminit_mrc.c b/src/northbridge/intel/sandybridge/raminit_mrc.c index a8acfbf980..29c766a59f 100644 --- a/src/northbridge/intel/sandybridge/raminit_mrc.c +++ b/src/northbridge/intel/sandybridge/raminit_mrc.c @@ -18,6 +18,7 @@ #include <bootmode.h> #include <cf9_reset.h> #include <string.h> +#include <device/device.h> #include <device/pci_ops.h> #include <arch/cpu.h> #include <cbmem.h> @@ -382,6 +383,16 @@ static void devicetree_fill_pei_data(struct pei_data *pei_data) pei_data->usb3.xhci_streams = cfg->usb3.xhci_streams; } +static void disable_p2p(void) +{ + /* Disable PCI-to-PCI bridge early to prevent probing by MRC. */ + const struct device *const p2p = pcidev_on_root(0x1e, 0); + if (p2p && p2p->enabled) + return; + + RCBA32(FD) |= PCH_DISABLE_P2P; +} + void perform_raminit(int s3resume) { int cbmem_was_initted; @@ -423,6 +434,8 @@ void perform_raminit(int s3resume) } } + disable_p2p(); + pei_data.boot_mode = s3resume ? 2 : 0; timestamp_add_now(TS_BEFORE_INITRAM); sdram_initialize(&pei_data); |