[coreboot-gerrit] Change in coreboot[master]: soc/intel/common/block/p2sb: Add ioapic BDF functions

[Arthur Heymans (Code Review)]

Arthur Heymans has submitted this change. ( https://review.coreboot.org/c/coreboot/+/47534 )

Change subject: soc/intel/common/block/p2sb: Add ioapic BDF functions
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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 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47534
Reviewed-by: Angel Pons 
Tested-by: build bot (Jenkins) 
---
M src/soc/intel/common/block/include/intelblocks/p2sb.h
M src/soc/intel/common/block/p2sb/p2sb.c
2 files changed, 22 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Angel Pons: Looks good to me, approved

diff --git a/src/soc/intel/common/block/include/intelblocks/p2sb.h b/src/soc/intel/common/block/include/intelblocks/p2sb.h
index 819b940..436861c 100644
--- a/src/soc/intel/common/block/include/intelblocks/p2sb.h
+++ b/src/soc/intel/common/block/include/intelblocks/p2sb.h
@@ -40,6 +40,9 @@

union p2sb_bdf p2sb_get_hpet_bdf(void);
 void p2sb_set_hpet_bdf(union p2sb_bdf bdf);
+union p2sb_bdf p2sb_get_ioapic_bdf(void);
+void p2sb_set_ioapic_bdf(union p2sb_bdf bdf);
+

/* SOC overrides */
 /*
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;