drivers: add tzc380 support

Add tzc380 support.

Signed-off-by: Peng Fan <peng.fan@nxp.com>

1 files changed, 174 insertions, 0 deletions

diff --git a/drivers/arm/tzc/tzc380.c b/drivers/arm/tzc/tzc380.c
new file mode 100644
index 00000000..03cd3ed4
--- /dev/null
+++ b/drivers/arm/tzc/tzc380.c
@@ -0,0 +1,174 @@
+/*
+ * Copyright 2017 NXP
+ *
+ * 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 <mmio.h>
+#include <stddef.h>
+#include <tzc380.h>
+
+struct tzc380_instance {
+	uintptr_t base;
+	uint8_t addr_width;
+	uint8_t num_regions;
+};
+
+struct tzc380_instance tzc380;
+
+static unsigned int tzc380_read_build_config(uintptr_t base)
+{
+	return mmio_read_32(base + BUILD_CONFIG_OFF);
+}
+
+static void tzc380_write_action(uintptr_t base, tzc_action_t action)
+{
+	mmio_write_32(base + ACTION_OFF, action);
+}
+
+static void tzc380_write_region_base_low(uintptr_t base, unsigned int region,
+				      unsigned int val)
+{
+	mmio_write_32(base + REGION_SETUP_LOW_OFF(region), val);
+}
+
+static void tzc380_write_region_base_high(uintptr_t base, unsigned int region,
+				       unsigned int val)
+{
+	mmio_write_32(base + REGION_SETUP_HIGH_OFF(region), val);
+}
+
+static void tzc380_write_region_attributes(uintptr_t base, unsigned int region,
+					unsigned int val)
+{
+	mmio_write_32(base + REGION_ATTRIBUTES_OFF(region), val);
+}
+
+void tzc380_init(uintptr_t base)
+{
+	unsigned int tzc_build;
+
+	assert(base);
+	tzc380.base = base;
+
+	/* Save values we will use later. */
+	tzc_build = tzc380_read_build_config(tzc380.base);
+	tzc380.addr_width  = ((tzc_build >> BUILD_CONFIG_AW_SHIFT) &
+			      BUILD_CONFIG_AW_MASK) + 1;
+	tzc380.num_regions = ((tzc_build >> BUILD_CONFIG_NR_SHIFT) &
+			       BUILD_CONFIG_NR_MASK) + 1;
+}
+
+static unsigned int addr_low(uintptr_t addr)
+{
+	return (unsigned int)addr;
+}
+
+static unsigned int addr_high(uintptr_t addr __unused)
+{
+#if (UINTPTR_MAX == UINT64_MAX)
+	return addr >> 32;
+#else
+	return 0;
+#endif
+}
+
+
+/*
+ * `tzc380_configure_region` is used to program regions into the TrustZone
+ * controller.
+ */
+void tzc380_configure_region(uint8_t region, uintptr_t region_base, unsigned int attr)
+{
+	assert(tzc380.base);
+
+	assert(region < tzc380.num_regions);
+
+	tzc380_write_region_base_low(tzc380.base, region, addr_low(region_base));
+	tzc380_write_region_base_high(tzc380.base, region, addr_high(region_base));
+	tzc380_write_region_attributes(tzc380.base, region, attr);
+}
+
+void tzc380_set_action(tzc_action_t action)
+{
+	assert(tzc380.base);
+
+	/*
+	 * - Currently no handler is provided to trap an error via interrupt
+	 *   or exception.
+	 * - The interrupt action has not been tested.
+	 */
+	tzc380_write_action(tzc380.base, action);
+}
+
+#if LOG_LEVEL >= LOG_LEVEL_INFO
+
+static unsigned int tzc380_read_region_attributes(uintptr_t base, unsigned int region)
+{
+	return mmio_read_32(base + REGION_ATTRIBUTES_OFF(region));
+}
+
+static unsigned int tzc380_read_region_base_low(uintptr_t base, unsigned int region)
+{
+	return mmio_read_32(base + REGION_SETUP_LOW_OFF(region));
+}
+
+static unsigned int tzc380_read_region_base_high(uintptr_t base, unsigned int region)
+{
+	return mmio_read_32(base + REGION_SETUP_HIGH_OFF(region));
+}
+
+#define	REGION_MAX	16
+void tzc380_dump_state(void)
+{
+	unsigned int n;
+	unsigned int temp_32reg, temp_32reg_h;
+
+	INFO("enter\n");
+	INFO("security_inversion_en %x\n",
+	     mmio_read_32(tzc380.base + SECURITY_INV_EN_OFF));
+	for (n = 0; n <= REGION_MAX; n++) {
+		temp_32reg = tzc380_read_region_attributes(tzc380.base, n);
+		if (!(temp_32reg & TZC_ATTR_REGION_EN_MASK))
+			continue;
+
+		INFO("\n");
+		INFO("region %d\n", n);
+		temp_32reg = tzc380_read_region_base_low(tzc380.base, n);
+		temp_32reg_h = tzc380_read_region_base_high(tzc380.base, n);
+		INFO("region_base: 0x%08x%08x\n", temp_32reg_h, temp_32reg);
+		temp_32reg = tzc380_read_region_attributes(tzc380.base, n);
+		INFO("region sp: %x\n", temp_32reg >> TZC_ATTR_SP_SHIFT);
+		INFO("region size: %x\n", (temp_32reg & TZC_REGION_SIZE_MASK) >>
+				TZC_REGION_SIZE_SHIFT);
+	}
+	INFO("exit\n");
+}
+
+#endif