soc/intel/common/block/p2sb: Add ioapic BDF functions
This allows to get/set the IOAPIC bus device function.
Change-Id: Ib5bb409efbcbc5729cf0e996655c7ac3f6a78223
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47534
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/common/block/p2sb/p2sb.c b/src/soc/intel/common/block/p2sb/p2sb.c
index fd54a08..05bef2b 100644
--- a/src/soc/intel/common/block/p2sb/p2sb.c
+++ b/src/soc/intel/common/block/p2sb/p2sb.c
@@ -73,6 +73,25 @@
pci_write_config16(PCH_DEV_P2SB, PCH_P2SB_HBDF, bdf.raw);
}
+union p2sb_bdf p2sb_get_ioapic_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_IBDF) };
+
+ if (was_hidden)
+ p2sb_hide();
+
+ return bdf;
+}
+
+void p2sb_set_ioapic_bdf(union p2sb_bdf bdf)
+{
+ pci_write_config16(PCH_DEV_P2SB, PCH_P2SB_IBDF, bdf.raw);
+}
+
static void p2sb_set_hide_bit(int hide)
{
const uint16_t reg = PCH_P2SB_E0 + 1;