diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2020-11-12 20:41:57 +0100 |
|---|---|---|
| committer | Arthur Heymans <arthur@aheymans.xyz> | 2020-11-20 10:13:31 +0000 |
| commit | a8798a317983508385138bb39f41e5e614e957f6 (patch) | |
| tree | 666bd2fe52dda1d5c4e73f41d7a2bbabb0c92aa3 /src/soc | |
| parent | 7ba970aa78816dd29052cd34304b6ea67953c003 (diff) | |
soc/intel/common/p2sb: Add helper function to determine p2sb state
Change-Id: I1d6f9c18160806e289e98c2fa5d290c61434112f
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47530
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Christian Walter <christian.walter@9elements.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc')
| -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 d97cd8d2d4..9673a2cf71 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"); } |