Push old Amlogic BL2 sourcesHEADmaster

1 files changed, 136 insertions, 0 deletions

diff --git a/plat/fvp/fvp_security.c b/plat/fvp/fvp_security.c
new file mode 100644
index 0000000..76c4541
--- /dev/null
+++ b/plat/fvp/fvp_security.c
@@ -0,0 +1,136 @@
+/*
+ * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <assert.h>
+#include <debug.h>
+#include <tzc400.h>
+#include "fvp_def.h"
+#include "fvp_private.h"
+
+/* Used to improve readability for configuring regions. */
+#define FILTER_SHIFT(filter)	(1 << filter)
+
+/*
+ * For the moment we assume that all security programming is done by the
+ * primary core.
+ * TODO:
+ * Might want to enable interrupt on violations when supported?
+ */
+void fvp_security_setup(void)
+{
+	tzc_instance_t controller;
+
+	/*
+	 * The Base FVP has a TrustZone address space controller, the Foundation
+	 * FVP does not. Trying to program the device on the foundation FVP will
+	 * cause an abort.
+	 *
+	 * If the platform had additional peripheral specific security
+	 * configurations, those would be configured here.
+	 */
+
+	if (!fvp_get_cfgvar(CONFIG_HAS_TZC))
+		return;
+
+	/*
+	 * The TrustZone controller controls access to main DRAM. Give
+	 * full NS access for the moment to use with OS.
+	 */
+	INFO("Configuring TrustZone Controller\n");
+
+	/*
+	 * The driver does some error checking and will assert.
+	 * - Provide base address of device on platform.
+	 * - Provide width of ACE-Lite IDs on platform.
+	 */
+	controller.base = TZC400_BASE;
+	controller.aid_width = FVP_AID_WIDTH;
+	tzc_init(&controller);
+
+	/*
+	 * Currently only filters 0 and 2 are connected on Base FVP.
+	 * Filter 0 : CPU clusters (no access to DRAM by default)
+	 * Filter 1 : not connected
+	 * Filter 2 : LCDs (access to VRAM allowed by default)
+	 * Filter 3 : not connected
+	 * Programming unconnected filters will have no effect at the
+	 * moment. These filter could, however, be connected in future.
+	 * So care should be taken not to configure the unused filters.
+	 */
+
+	/* Disable all filters before programming. */
+	tzc_disable_filters(&controller);
+
+	/*
+	 * Allow only non-secure access to all DRAM to supported devices.
+	 * Give access to the CPUs and Virtio. Some devices
+	 * would normally use the default ID so allow that too. We use
+	 * two regions to cover the blocks of physical memory in the FVPs.
+	 *
+	 * Software executing in the secure state, such as a secure
+	 * boot-loader, can access the DRAM by using the NS attributes in
+	 * the MMU translation tables and descriptors.
+	 */
+
+	/* Set to cover the first block of DRAM */
+	tzc_configure_region(&controller, FILTER_SHIFT(0), 1,
+			DRAM1_BASE, DRAM1_END - DRAM1_SEC_SIZE,
+			TZC_REGION_S_NONE,
+			TZC_REGION_ACCESS_RDWR(FVP_NSAID_DEFAULT) |
+			TZC_REGION_ACCESS_RDWR(FVP_NSAID_PCI) |
+			TZC_REGION_ACCESS_RDWR(FVP_NSAID_AP) |
+			TZC_REGION_ACCESS_RDWR(FVP_NSAID_VIRTIO) |
+			TZC_REGION_ACCESS_RDWR(FVP_NSAID_VIRTIO_OLD));
+
+	/* Set to cover the secure reserved region */
+	tzc_configure_region(&controller, FILTER_SHIFT(0), 3,
+			(DRAM1_END - DRAM1_SEC_SIZE) + 1 , DRAM1_END,
+			TZC_REGION_S_RDWR,
+			0x0);
+
+	/* Set to cover the second block of DRAM */
+	tzc_configure_region(&controller, FILTER_SHIFT(0), 2,
+			DRAM2_BASE, DRAM2_END, TZC_REGION_S_NONE,
+			TZC_REGION_ACCESS_RDWR(FVP_NSAID_DEFAULT) |
+			TZC_REGION_ACCESS_RDWR(FVP_NSAID_PCI) |
+			TZC_REGION_ACCESS_RDWR(FVP_NSAID_AP) |
+			TZC_REGION_ACCESS_RDWR(FVP_NSAID_VIRTIO) |
+			TZC_REGION_ACCESS_RDWR(FVP_NSAID_VIRTIO_OLD));
+
+	/*
+	 * TODO: Interrupts are not currently supported. The only
+	 * options we have are for access errors to occur quietly or to
+	 * cause an exception. We choose to cause an exception.
+	 */
+	tzc_set_action(&controller, TZC_ACTION_ERR);
+
+	/* Enable filters. */
+	tzc_enable_filters(&controller);
+}