1 files changed, 151 insertions, 0 deletions
diff --git a/bsps/sparc/leon3/include/bsp/irqimpl.h b/bsps/sparc/leon3/include/bsp/irqimpl.h
new file mode 100644
index 0000000000..9a9eae51f7
--- /dev/null
+++ b/bsps/sparc/leon3/include/bsp/irqimpl.h
@@ -0,0 +1,151 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup RTEMSBSPsSPARCLEON3
+ *
+ * @brief This header file provides interfaces used by the interrupt support
+ *   implementation.
+ */
+
+/*
+ * Copyright (C) 2021 embedded brains GmbH & Co. KG
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * 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 OWNER 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.
+ */
+
+#ifndef LIBBSP_SPARC_LEON3_BSP_IRQIMPL_H
+#define LIBBSP_SPARC_LEON3_BSP_IRQIMPL_H
+
+#include <rtems.h>
+#include <grlib/irqamp-regs.h>
+#include <grlib/io.h>
+
+#include <bspopts.h>
+
+struct ambapp_dev;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @addtogroup RTEMSBSPsSPARCLEON3
+ *
+ * @{
+ */
+
+/**
+ * @brief This object provides the index of the boot processor.
+ *
+ * This object should be read-only after initialization.
+ */
+extern uint32_t LEON3_Cpu_Index;
+
+/**
+ * @brief This lock serializes the interrupt controller access.
+ */
+extern rtems_interrupt_lock LEON3_IrqCtrl_Lock;
+
+/**
+ * @brief Acquires the interrupt controller lock.
+ *
+ * @param[out] _lock_context is the lock context.
+ */
+#define LEON3_IRQCTRL_ACQUIRE( _lock_context ) \
+  rtems_interrupt_lock_acquire( &LEON3_IrqCtrl_Lock, _lock_context )
+
+/**
+ * @brief Releases the interrupt controller lock.
+ *
+ * @param[in, out] _lock_context is the lock context.
+ */
+#define LEON3_IRQCTRL_RELEASE( _lock_context ) \
+  rtems_interrupt_lock_release( &LEON3_IrqCtrl_Lock, _lock_context )
+
+/**
+ * @brief This pointer provides the IRQ(A)MP register block address.
+ */
+#if defined(LEON3_IRQAMP_BASE)
+#define LEON3_IrqCtrl_Regs ((irqamp *) LEON3_IRQAMP_BASE)
+#else
+extern irqamp *LEON3_IrqCtrl_Regs;
+
+/**
+ * @brief This pointer provides the IRQ(A)MP device information block.
+ */
+extern struct ambapp_dev *LEON3_IrqCtrl_Adev;
+#endif
+
+/**
+ * @brief This object provides the interrupt number used to multiplex extended
+ *   interrupts or is zero if no extended interrupts are available.
+ *
+ * This object should be read-only after initialization.
+ */
+#if defined(LEON3_IRQAMP_EXTENDED_INTERRUPT)
+#define LEON3_IrqCtrl_EIrq LEON3_IRQAMP_EXTENDED_INTERRUPT
+#else
+extern uint32_t LEON3_IrqCtrl_EIrq;
+#endif
+
+/**
+ * @brief Initializes the interrupt controller for the boot processor.
+ *
+ * @param[in, out] regs is the IRQ(A)MP register block address.
+ */
+void leon3_ext_irq_init( irqamp *regs );
+
+/**
+ * @brief Acknowledges and maps extended interrupts if this feature is
+ * available and the interrupt for extended interrupts is present.
+ *
+ * @param irq is the standard interrupt number.
+ */
+static inline uint32_t bsp_irq_fixup( uint32_t irq )
+{
+  uint32_t eirq;
+  uint32_t cpu_self;
+
+  if ( irq != LEON3_IrqCtrl_EIrq ) {
+    return irq;
+  }
+
+  cpu_self = _LEON3_Get_current_processor();
+  eirq = grlib_load_32( &LEON3_IrqCtrl_Regs->pextack[ cpu_self ] );
+  eirq = IRQAMP_PEXTACK_EID_4_0_GET( eirq );
+
+  if ( eirq < 16 ) {
+    return irq;
+  }
+
+  return eirq;
+}
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LIBBSP_SPARC_LEON3_BSP_IRQIMPL_H */