bsp/leon3: Untangle interrupt controller support

Separate the probing of the interrupt controller from the
initialization.

bsps/sparc/leon3/include/bsp/irqimpl.h

@@ -0,0 +1,83 @@
+/* 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/grlib.h>
+
+struct ambapp_dev;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @addtogroup RTEMSBSPsSPARCLEON3
+ *
+ * @{
+ */
+
+/**
+ * @brief This lock serializes the interrupt controller access.
+ */
+extern rtems_interrupt_lock LEON3_IrqCtrl_Lock;
+
+/**
+ * @brief This pointer provides the IRQ(A)MP register block address.
+ */
+extern volatile struct irqmp_regs *LEON3_IrqCtrl_Regs;
+
+/**
+ * @brief This pointer provides the IRQ(A)MP device information block.
+ */
+extern struct ambapp_dev *LEON3_IrqCtrl_Adev;
+
+/**
+ * @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( volatile struct irqmp_regs *regs );
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LIBBSP_SPARC_LEON3_BSP_IRQIMPL_H */

bsps/sparc/leon3/include/leon.h

@@ -44,6 +44,7 @@
 
 #include <rtems.h>
 #include <amba.h>
+#include <bsp/irqimpl.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -146,10 +147,6 @@ extern "C" {
 #define LEON3_REG_CACHE_CTRL_FI      0x00200000 /* Flush instruction cache */
 #define LEON3_REG_CACHE_CTRL_DS      0x00800000 /* Data cache snooping */
 
-/* LEON3 Interrupt Controller */
-extern volatile struct irqmp_regs *LEON3_IrqCtrl_Regs;
-extern struct ambapp_dev *LEON3_IrqCtrl_Adev;
-
 /* LEON3 GP Timer */
 extern volatile struct gptimer_regs *LEON3_Timer_Regs;
 extern struct ambapp_dev *LEON3_Timer_Adev;
@@ -193,8 +190,6 @@ static __inline__ int bsp_irq_fixup(int irq)
  *        store the result back are vulnerable.
  */
 
-extern rtems_interrupt_lock LEON3_IrqCtrl_Lock;
-
 #define LEON3_IRQCTRL_ACQUIRE( _lock_context ) \
   rtems_interrupt_lock_acquire( &LEON3_IrqCtrl_Lock, _lock_context )
 
@@ -410,9 +405,6 @@ extern int leon3_timer_core_index;
  */
 extern unsigned int leon3_timer_prescaler;
 
-/* GRLIB extended IRQ controller register */
-void leon3_ext_irq_init(void);
-
 RTEMS_NO_RETURN void leon3_power_down_loop(void);
 
 static inline uint32_t leon3_get_cpu_count(

bsps/sparc/leon3/start/amba.c

@@ -115,9 +115,6 @@ RTEMS_SYSINIT_ITEM(
 );
 #endif
 
-rtems_interrupt_lock LEON3_IrqCtrl_Lock =
-  RTEMS_INTERRUPT_LOCK_INITIALIZER("LEON3 IrqCtrl");
-
 /* Pointers to Interrupt Controller configuration registers */
 volatile struct irqmp_regs *LEON3_IrqCtrl_Regs;
 struct ambapp_dev *LEON3_IrqCtrl_Adev;
@@ -166,12 +163,6 @@ static void amba_initialize(void)
     icsel = (icsel >> ((7 - (LEON3_Cpu_Index & 0x7)) * 4)) & 0xf;
     LEON3_IrqCtrl_Regs += icsel;
   }
-  LEON3_IrqCtrl_Regs->mask[LEON3_Cpu_Index] = 0;
-  LEON3_IrqCtrl_Regs->force[LEON3_Cpu_Index] = 0;
-  LEON3_IrqCtrl_Regs->iclear = 0xffffffff;
-
-  /* Init Extended IRQ controller if available */
-  leon3_ext_irq_init();
 
   /* find GP Timer */
   adev = (void *)ambapp_for_each(plb, (OPTIONS_ALL|OPTIONS_APB_SLVS),

bsps/sparc/leon3/start/eirq.c

@@ -38,12 +38,19 @@
 /* GRLIB extended IRQ controller IRQ number */
 int LEON3_IrqCtrl_EIrq = -1;
 
+rtems_interrupt_lock LEON3_IrqCtrl_Lock =
+  RTEMS_INTERRUPT_LOCK_INITIALIZER("LEON3 IrqCtrl");
+
 /* Initialize Extended Interrupt controller */
-void leon3_ext_irq_init(void)
+void leon3_ext_irq_init(volatile struct irqmp_regs *regs)
 {
-  if ( (LEON3_IrqCtrl_Regs->mpstat >> 16) & 0xf ) {
+  regs->mask[LEON3_Cpu_Index] = 0;
+  regs->force[LEON3_Cpu_Index] = 0;
+  regs->iclear = 0xffffffff;
+
+  if ( (regs->mpstat >> 16) & 0xf ) {
     /* Extended IRQ controller available */
-    LEON3_IrqCtrl_EIrq = (LEON3_IrqCtrl_Regs->mpstat >> 16) & 0xf;
+    LEON3_IrqCtrl_EIrq = (regs->mpstat >> 16) & 0xf;
   }
 }
 
@@ -76,6 +83,8 @@ void bsp_interrupt_facility_initialize(void)
     leon3_interrupt_affinities[i] = affinity;
   }
 #endif
+
+  leon3_ext_irq_init(LEON3_IrqCtrl_Regs);
 }
 
 rtems_status_code bsp_interrupt_get_attributes(

spec/build/bsps/sparc/leon3/obj.yml

@@ -16,6 +16,7 @@ install:
 - destination: ${BSP_INCLUDEDIR}/bsp
   source:
   - bsps/sparc/leon3/include/bsp/irq.h
+  - bsps/sparc/leon3/include/bsp/irqimpl.h
   - bsps/sparc/leon3/include/bsp/watchdog.h
 - destination: ${BSP_LIBDIR}
   source: