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+/*
+ * Copyright (c) 2015, 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 <arch_helpers.h>
+#include <assert.h>
+#include <bl_common.h>
+#include <cassert.h>
+#include <gic_common.h>
+#include <gicv3.h>
+#include <interrupt_mgmt.h>
+#include <platform.h>
+
+#if IMAGE_BL31
+
+/*
+ * The following platform GIC functions are weakly defined. They
+ * provide typical implementations that may be re-used by multiple
+ * platforms but may also be overridden by a platform if required.
+ */
+#pragma weak plat_ic_get_pending_interrupt_id
+#pragma weak plat_ic_get_pending_interrupt_type
+#pragma weak plat_ic_acknowledge_interrupt
+#pragma weak plat_ic_get_interrupt_type
+#pragma weak plat_ic_end_of_interrupt
+#pragma weak plat_interrupt_type_to_line
+
+CASSERT((INTR_TYPE_S_EL1 == INTR_GROUP1S) &&
+ (INTR_TYPE_NS == INTR_GROUP1NS) &&
+ (INTR_TYPE_EL3 == INTR_GROUP0), assert_interrupt_type_mismatch);
+
+/*
+ * This function returns the highest priority pending interrupt at
+ * the Interrupt controller
+ */
+uint32_t plat_ic_get_pending_interrupt_id(void)
+{
+ unsigned int irqnr;
+
+ assert(IS_IN_EL3());
+ irqnr = gicv3_get_pending_interrupt_id();
+ return (gicv3_is_intr_id_special_identifier(irqnr)) ?
+ INTR_ID_UNAVAILABLE : irqnr;
+}
+
+/*
+ * This function returns the type of the highest priority pending interrupt
+ * at the Interrupt controller. In the case of GICv3, the Highest Priority
+ * Pending interrupt system register (`ICC_HPPIR0_EL1`) is read to determine
+ * the id of the pending interrupt. The type of interrupt depends upon the
+ * id value as follows.
+ * 1. id = PENDING_G1S_INTID (1020) is reported as a S-EL1 interrupt
+ * 2. id = PENDING_G1NS_INTID (1021) is reported as a Non-secure interrupt.
+ * 3. id = GIC_SPURIOUS_INTERRUPT (1023) is reported as an invalid interrupt
+ * type.
+ * 4. All other interrupt id's are reported as EL3 interrupt.
+ */
+uint32_t plat_ic_get_pending_interrupt_type(void)
+{
+ unsigned int irqnr;
+
+ assert(IS_IN_EL3());
+ irqnr = gicv3_get_pending_interrupt_type();
+
+ switch (irqnr) {
+ case PENDING_G1S_INTID:
+ return INTR_TYPE_S_EL1;
+ case PENDING_G1NS_INTID:
+ return INTR_TYPE_NS;
+ case GIC_SPURIOUS_INTERRUPT:
+ return INTR_TYPE_INVAL;
+ default:
+ return INTR_TYPE_EL3;
+ }
+}
+
+/*
+ * This function returns the highest priority pending interrupt at
+ * the Interrupt controller and indicates to the Interrupt controller
+ * that the interrupt processing has started.
+ */
+uint32_t plat_ic_acknowledge_interrupt(void)
+{
+ assert(IS_IN_EL3());
+ return gicv3_acknowledge_interrupt();
+}
+
+/*
+ * This function returns the type of the interrupt `id`, depending on how
+ * the interrupt has been configured in the interrupt controller
+ */
+uint32_t plat_ic_get_interrupt_type(uint32_t id)
+{
+ assert(IS_IN_EL3());
+ return gicv3_get_interrupt_type(id, plat_my_core_pos());
+}
+
+/*
+ * This functions is used to indicate to the interrupt controller that
+ * the processing of the interrupt corresponding to the `id` has
+ * finished.
+ */
+void plat_ic_end_of_interrupt(uint32_t id)
+{
+ assert(IS_IN_EL3());
+ gicv3_end_of_interrupt(id);
+}
+
+/*
+ * An ARM processor signals interrupt exceptions through the IRQ and FIQ pins.
+ * The interrupt controller knows which pin/line it uses to signal a type of
+ * interrupt. It lets the interrupt management framework determine for a type of
+ * interrupt and security state, which line should be used in the SCR_EL3 to
+ * control its routing to EL3. The interrupt line is represented as the bit
+ * position of the IRQ or FIQ bit in the SCR_EL3.
+ */
+uint32_t plat_interrupt_type_to_line(uint32_t type,
+ uint32_t security_state)
+{
+ assert(type == INTR_TYPE_S_EL1 ||
+ type == INTR_TYPE_EL3 ||
+ type == INTR_TYPE_NS);
+
+ assert(sec_state_is_valid(security_state));
+ assert(IS_IN_EL3());
+
+ switch (type) {
+ case INTR_TYPE_S_EL1:
+ /*
+ * The S-EL1 interrupts are signaled as IRQ in S-EL0/1 contexts
+ * and as FIQ in the NS-EL0/1/2 contexts
+ */
+ if (security_state == SECURE)
+ return __builtin_ctz(SCR_IRQ_BIT);
+ else
+ return __builtin_ctz(SCR_FIQ_BIT);
+ case INTR_TYPE_NS:
+ /*
+ * The Non secure interrupts will be signaled as FIQ in S-EL0/1
+ * contexts and as IRQ in the NS-EL0/1/2 contexts.
+ */
+ if (security_state == SECURE)
+ return __builtin_ctz(SCR_FIQ_BIT);
+ else
+ return __builtin_ctz(SCR_IRQ_BIT);
+ default:
+ assert(0);
+ /* Fall through in the release build */
+ case INTR_TYPE_EL3:
+ /*
+ * The EL3 interrupts are signaled as FIQ in both S-EL0/1 and
+ * NS-EL0/1/2 contexts
+ */
+ return __builtin_ctz(SCR_FIQ_BIT);
+ }
+}
+#endif
+#if IMAGE_BL32
+
+#pragma weak plat_ic_get_pending_interrupt_id
+#pragma weak plat_ic_acknowledge_interrupt
+#pragma weak plat_ic_end_of_interrupt
+
+/*
+ * This function returns the highest priority pending interrupt at
+ * the Interrupt controller
+ */
+uint32_t plat_ic_get_pending_interrupt_id(void)
+{
+ unsigned int irqnr;
+
+ assert(IS_IN_EL1());
+ irqnr = gicv3_get_pending_interrupt_id_sel1();
+ return (irqnr == GIC_SPURIOUS_INTERRUPT) ?
+ INTR_ID_UNAVAILABLE : irqnr;
+}
+
+/*
+ * This function returns the highest priority pending interrupt at
+ * the Interrupt controller and indicates to the Interrupt controller
+ * that the interrupt processing has started.
+ */
+uint32_t plat_ic_acknowledge_interrupt(void)
+{
+ assert(IS_IN_EL1());
+ return gicv3_acknowledge_interrupt_sel1();
+}
+
+/*
+ * This functions is used to indicate to the interrupt controller that
+ * the processing of the interrupt corresponding to the `id` has
+ * finished.
+ */
+void plat_ic_end_of_interrupt(uint32_t id)
+{
+ assert(IS_IN_EL1());
+ gicv3_end_of_interrupt_sel1(id);
+}
+#endif