soc/intel/common/block: Move p2sb common functions into block/p2sb

This patch cleans soc/intel/{apollolake/cannonlake/skylake} by moving
common soc code into common/block/p2sb.

BUG=b:78109109
BRANCH=none
TEST=Build and boot KBL/CNL/APL platform.

Change-Id: Ie9fd933d155b3fcd0d616b41cdf042cefe2c649a
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/26132
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/src/soc/intel/skylake/p2sb.c b/src/soc/intel/skylake/p2sb.c
new file mode 100644
index 0000000000..c1e9118248
--- /dev/null
+++ b/src/soc/intel/skylake/p2sb.c
@@ -0,0 +1,46 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2018 Intel Corporation.
+ *
+ * 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
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <console/console.h>
+#include <intelblocks/p2sb.h>
+
+void p2sb_soc_get_sb_mask(uint32_t *ep_mask, size_t count)
+{
+	uint32_t mask;
+
+	if (count != P2SB_EP_MASK_MAX_REG) {
+		printk(BIOS_ERR, "Unable to program EPMASK registers\n");
+		return;
+	}
+
+	/*
+	 * Set p2sb PCI offset EPMASK5 [29, 28, 27, 26] to disable Sideband
+	 * access for PCI Root Bridge.
+	 * Set p2sb PCI offset EPMASK5 [17, 16,10, 1] to disable Sideband
+	 * access for MIPI controller.
+	 */
+	mask = (1 << 29) | (1 << 28) | (1 << 27) | (1 << 26) | (1 << 17) |
+			 (1 << 16) | (1 << 10) | (1 << 1);
+
+	ep_mask[P2SB_EP_MASK_5_REG] = mask;
+
+	/*
+	 * Set p2sb PCI offset EPMASK7 [6, 5] to disable Sideband
+	 * access for XHCI controller.
+	 */
+	mask = (1 << 6) | (1 << 5);
+
+	ep_mask[P2SB_EP_MASK_7_REG] = mask;
+}