From cfa435a0fffad43d18b7251cb8d73c61a938eb2f Mon Sep 17 00:00:00 2001
From: Werner Zeh <werner.zeh@siemens.com>
Date: Fri, 14 Dec 2018 15:14:10 +0100
Subject: intel/apollolake: Add fixed resources for VTd to system resources

If the VTd feature is enabled, there will be up to two fixed resources
which are set up by the FSP. Add these resources to the list of system
resources so that the PCI enumerator will know them.

Change-Id: If96fc1c93746e3c7f510e5b3095ea3090e1b8807
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/30991
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
 src/soc/intel/apollolake/systemagent.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'src/soc/intel/apollolake')

diff --git a/src/soc/intel/apollolake/systemagent.c b/src/soc/intel/apollolake/systemagent.c
index c8f1330e78..fd9108208c 100644
--- a/src/soc/intel/apollolake/systemagent.c
+++ b/src/soc/intel/apollolake/systemagent.c
@@ -4,6 +4,7 @@
  * Copyright (C) 2015 Intel Corp.
  * (Written by Andrey Petrov <andrey.petrov@intel.com> for Intel Corp.)
  * (Written by Alexandru Gagniuc <alexandrux.gagniuc@intel.com> for Intel Corp.)
+ * Copyright (C) 2019 Siemens AG
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,6 +20,7 @@
 #include <cpu/cpu.h>
 #include <console/console.h>
 #include <device/device.h>
+#include <device/pci_ops.h>
 #include <fsp/util.h>
 #include <intelblocks/systemagent.h>
 #include <soc/iomap.h>
@@ -40,6 +42,24 @@ void soc_add_fixed_mmio_resources(struct device *dev, int *index)
 
 	sa_add_fixed_mmio_resources(dev, index, soc_fixed_resources,
 			ARRAY_SIZE(soc_fixed_resources));
+
+	/* Add VTd resources if VTd is enabled. These resources were
+	   set up by the FSP-S call. */
+	if ((pci_read_config32(dev, CAPID0_A) & VTD_DISABLE))
+		return;
+
+	if (MCHBAR32(GFXVTBAR) & VTBAR_ENABLED) {
+		mmio_resource(dev, *index,
+			      (MCHBAR64(GFXVTBAR) & VTBAR_MASK) / KiB,
+			      VTBAR_SIZE / KiB);
+		(*index)++;
+	}
+	if (MCHBAR32(DEFVTBAR) & VTBAR_ENABLED) {
+		mmio_resource(dev, *index,
+			      (MCHBAR64(DEFVTBAR) & VTBAR_MASK) / KiB,
+			      VTBAR_SIZE / KiB);
+		(*index)++;
+	}
 }
 
 int soc_get_uncore_prmmr_base_and_mask(uint64_t *prmrr_base,
-- 
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