diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/p2sb.h | 12 | ||||
| -rw-r--r-- | src/soc/intel/common/block/p2sb/p2sb.c | 19 |
2 files changed, 31 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/include/intelblocks/p2sb.h b/src/soc/intel/common/block/include/intelblocks/p2sb.h index 71f9c6255d..819b9403a3 100644 --- a/src/soc/intel/common/block/include/intelblocks/p2sb.h +++ b/src/soc/intel/common/block/include/intelblocks/p2sb.h @@ -29,6 +29,18 @@ void p2sb_disable_sideband_access(void); void p2sb_enable_bar(void); void p2sb_configure_hpet(void); +union p2sb_bdf { + struct { + uint16_t fn : 3; + uint16_t dev : 5; + uint16_t bus : 8; + }; + uint16_t raw; +}; + +union p2sb_bdf p2sb_get_hpet_bdf(void); +void p2sb_set_hpet_bdf(union p2sb_bdf bdf); + /* SOC overrides */ /* * Each SoC should implement EP Mask register to disable SB access diff --git a/src/soc/intel/common/block/p2sb/p2sb.c b/src/soc/intel/common/block/p2sb/p2sb.c index 9673a2cf71..fd54a08dda 100644 --- a/src/soc/intel/common/block/p2sb/p2sb.c +++ b/src/soc/intel/common/block/p2sb/p2sb.c @@ -54,6 +54,25 @@ void p2sb_configure_hpet(void) pci_write_config8(PCH_DEV_P2SB, HPTC_OFFSET, HPTC_ADDR_ENABLE_BIT); } +union p2sb_bdf p2sb_get_hpet_bdf(void) +{ + const bool was_hidden = p2sb_is_hidden(); + if (was_hidden) + p2sb_unhide(); + + union p2sb_bdf bdf = { .raw = pci_read_config16(PCH_DEV_P2SB, PCH_P2SB_HBDF) }; + + if (was_hidden) + p2sb_hide(); + + return bdf; +} + +void p2sb_set_hpet_bdf(union p2sb_bdf bdf) +{ + pci_write_config16(PCH_DEV_P2SB, PCH_P2SB_HBDF, bdf.raw); +} + static void p2sb_set_hide_bit(int hide) { const uint16_t reg = PCH_P2SB_E0 + 1; |