From 102b0d2daa97dae68d3eed54d8fe37a9cc38a892 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 28 Apr 2024 11:13:47 +0200
Subject: Adding upstream version 2.8.0+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 plat/arm/soc/common/soc_css_security.c | 73 ++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 plat/arm/soc/common/soc_css_security.c

(limited to 'plat/arm/soc/common/soc_css_security.c')

diff --git a/plat/arm/soc/common/soc_css_security.c b/plat/arm/soc/common/soc_css_security.c
new file mode 100644
index 0000000..4f6bf61
--- /dev/null
+++ b/plat/arm/soc/common/soc_css_security.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <platform_def.h>
+
+#include <drivers/arm/nic_400.h>
+#include <lib/mmio.h>
+#include <plat/arm/soc/common/soc_css.h>
+
+void soc_css_init_nic400(void)
+{
+	/*
+	 * NIC-400 Access Control Initialization
+	 *
+	 * Define access privileges by setting each corresponding bit to:
+	 *   0 = Secure access only
+	 *   1 = Non-secure access allowed
+	 */
+
+	/*
+	 * Allow non-secure access to some SOC regions, excluding UART1, which
+	 * remains secure (unless CSS_NON_SECURE_UART is set).
+	 * Note: This is the NIC-400 device on the SOC
+	 */
+	mmio_write_32(SOC_CSS_NIC400_BASE +
+		NIC400_ADDR_CTRL_SECURITY_REG(SOC_CSS_NIC400_USB_EHCI), ~0);
+	mmio_write_32(SOC_CSS_NIC400_BASE +
+		NIC400_ADDR_CTRL_SECURITY_REG(SOC_CSS_NIC400_TLX_MASTER), ~0);
+	mmio_write_32(SOC_CSS_NIC400_BASE +
+		NIC400_ADDR_CTRL_SECURITY_REG(SOC_CSS_NIC400_USB_OHCI), ~0);
+	mmio_write_32(SOC_CSS_NIC400_BASE +
+		NIC400_ADDR_CTRL_SECURITY_REG(SOC_CSS_NIC400_PL354_SMC), ~0);
+	mmio_write_32(SOC_CSS_NIC400_BASE +
+		NIC400_ADDR_CTRL_SECURITY_REG(SOC_CSS_NIC400_APB4_BRIDGE), ~0);
+#if  CSS_NON_SECURE_UART
+	/* Configure UART for non-secure access */
+	mmio_write_32(SOC_CSS_NIC400_BASE +
+		NIC400_ADDR_CTRL_SECURITY_REG(SOC_CSS_NIC400_BOOTSEC_BRIDGE), ~0);
+#else
+	mmio_write_32(SOC_CSS_NIC400_BASE +
+		NIC400_ADDR_CTRL_SECURITY_REG(SOC_CSS_NIC400_BOOTSEC_BRIDGE),
+		~SOC_CSS_NIC400_BOOTSEC_BRIDGE_UART1);
+#endif /* CSS_NON_SECURE_UART */
+
+}
+
+
+#define PCIE_SECURE_REG		0x3000
+/* Mask uses REG and MEM access bits */
+#define PCIE_SEC_ACCESS_MASK	((1 << 0) | (1 << 1))
+
+void soc_css_init_pcie(void)
+{
+#if !PLAT_juno
+	/*
+	 * Do not initialize PCIe in emulator environment.
+	 * Platform ID register not supported on Juno
+	 */
+	if (BOARD_CSS_GET_PLAT_TYPE(BOARD_CSS_PLAT_ID_REG_ADDR) ==
+			BOARD_CSS_PLAT_TYPE_EMULATOR)
+		return;
+#endif /* PLAT_juno */
+
+	/*
+	 * PCIE Root Complex Security settings to enable non-secure
+	 * access to config registers.
+	 */
+	mmio_write_32(SOC_CSS_PCIE_CONTROL_BASE + PCIE_SECURE_REG,
+			PCIE_SEC_ACCESS_MASK);
+}
-- 
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