diff options
| -rw-r--r-- | src/soc/intel/common/block/p2sb/p2sb.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/src/soc/intel/common/block/p2sb/p2sb.c b/src/soc/intel/common/block/p2sb/p2sb.c index d97cd8d2d4fa..9673a2cf713b 100644 --- a/src/soc/intel/common/block/p2sb/p2sb.c +++ b/src/soc/intel/common/block/p2sb/p2sb.c @@ -15,6 +15,18 @@ #define HIDE_BIT (1 << 0) +static bool p2sb_is_hidden(void) +{ + const uint16_t pci_vid = pci_read_config16(PCH_DEV_P2SB, PCI_VENDOR_ID); + + if (pci_vid == 0xffff) + return true; + if (pci_vid == PCI_VENDOR_ID_INTEL) + return false; + printk(BIOS_ERR, "P2SB PCI_VENDOR_ID is invalid, unknown if hidden\n"); + return true; +} + void p2sb_enable_bar(void) { /* Enable PCR Base address in PCH */ @@ -59,8 +71,7 @@ void p2sb_unhide(void) { p2sb_set_hide_bit(0); - if (pci_read_config16(PCH_DEV_P2SB, PCI_VENDOR_ID) != - PCI_VENDOR_ID_INTEL) + if (p2sb_is_hidden()) die_with_post_code(POST_HW_INIT_FAILURE, "Unable to unhide PCH_DEV_P2SB device !\n"); } @@ -69,8 +80,7 @@ void p2sb_hide(void) { p2sb_set_hide_bit(1); - if (pci_read_config16(PCH_DEV_P2SB, PCI_VENDOR_ID) != - 0xFFFF) + if (!p2sb_is_hidden()) die_with_post_code(POST_HW_INIT_FAILURE, "Unable to hide PCH_DEV_P2SB device !\n"); } |