bsps: Shared ARMv7-M interrupt support

c/src/lib/libbsp/arm/lm3s69xx/Makefile.am

@@ -42,6 +42,7 @@ include_bsp_HEADERS += ../../shared/include/irq-info.h
 include_bsp_HEADERS += ../../shared/include/stackalloc.h
 include_bsp_HEADERS += ../../shared/tod.h
 include_bsp_HEADERS += ../shared/include/start.h
+include_bsp_HEADERS += ../shared/armv7m/include/armv7m-irq.h
 include_bsp_HEADERS += include/irq.h
 include_bsp_HEADERS += include/uart.h
 include_bsp_HEADERS += include/lm3s69xx.h
@@ -82,7 +83,8 @@ libbsp_a_SOURCES += ../../shared/src/irq-info.c
 libbsp_a_SOURCES += ../../shared/src/irq-legacy.c
 libbsp_a_SOURCES += ../../shared/src/irq-server.c
 libbsp_a_SOURCES += ../../shared/src/irq-shell.c
-libbsp_a_SOURCES += irq/irq.c
+libbsp_a_SOURCES += ../shared/armv7m/irq/armv7m-irq.c
+libbsp_a_SOURCES += ../shared/armv7m/irq/armv7m-irq-dispatch.c
 
 # Console
 libbsp_a_SOURCES += ../../shared/console.c

c/src/lib/libbsp/arm/lm3s69xx/irq/irq.c

@@ -1,47 +0,0 @@
-/*
- * Copyright (c) 2011 Sebastian Huber.  All rights reserved.
- *
- *  embedded brains GmbH
- *  Obere Lagerstr. 30
- *  82178 Puchheim
- *  Germany
- *  <rtems@embedded-brains.de>
- *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rtems.com/license/LICENSE.
- */
-
-#include <string.h>
-
-#include <rtems/score/armv7m.h>
-
-#include <bsp.h>
-#include <bsp/irq.h>
-#include <bsp/irq-generic.h>
-#include <bsp/lm3s69xx.h>
-
-static __attribute__((aligned(128))) ARMV7M_Exception_handler
-  lm3s69xx_vector_table [BSP_INTERRUPT_VECTOR_MAX + 1];
-
-void bsp_interrupt_dispatch(void)
-{
-}
-
-rtems_status_code bsp_interrupt_vector_enable(rtems_vector_number vector)
-{
-  return RTEMS_SUCCESSFUL;
-}
-
-rtems_status_code bsp_interrupt_vector_disable(rtems_vector_number vector)
-{
-  return RTEMS_SUCCESSFUL;
-}
-
-rtems_status_code bsp_interrupt_facility_initialize(void)
-{
-  memcpy(&lm3s69xx_vector_table [0], (void *) 0, sizeof(lm3s69xx_vector_table));
-  _ARMV7M_SCB->vtor = &lm3s69xx_vector_table [0];
-
-  return RTEMS_SUCCESSFUL;
-}

c/src/lib/libbsp/arm/lm3s69xx/preinstall.am

@@ -89,6 +89,10 @@ $(PROJECT_INCLUDE)/bsp/start.h: ../shared/include/start.h $(PROJECT_INCLUDE)/bsp
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/start.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/start.h
 
+$(PROJECT_INCLUDE)/bsp/armv7m-irq.h: ../shared/armv7m/include/armv7m-irq.h $(PROJECT_INCLUDE)/bsp/$(dirstamp)
+	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/armv7m-irq.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/armv7m-irq.h
+
 $(PROJECT_INCLUDE)/bsp/irq.h: include/irq.h $(PROJECT_INCLUDE)/bsp/$(dirstamp)
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/irq.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/irq.h

c/src/lib/libbsp/arm/lpc24xx/Makefile.am

@@ -39,6 +39,7 @@ include_bsp_HEADERS += ../shared/lpc/include/lpc-i2s.h
 include_bsp_HEADERS += ../shared/lpc/include/lpc-emc.h
 include_bsp_HEADERS += ../shared/lpc/include/lpc-dma.h
 include_bsp_HEADERS += ../shared/lpc/include/lpc-lcd.h
+include_bsp_HEADERS += ../shared/armv7m/include/armv7m-irq.h
 include_bsp_HEADERS += include/dma.h
 include_bsp_HEADERS += include/i2c.h
 include_bsp_HEADERS += include/io.h
@@ -112,6 +113,8 @@ libbsp_a_SOURCES += ../../shared/src/irq-info.c
 libbsp_a_SOURCES += ../../shared/src/irq-legacy.c
 libbsp_a_SOURCES += ../../shared/src/irq-server.c
 libbsp_a_SOURCES += ../../shared/src/irq-shell.c
+libbsp_a_SOURCES += ../shared/armv7m/irq/armv7m-irq.c
+libbsp_a_SOURCES += ../shared/armv7m/irq/armv7m-irq-dispatch.c
 libbsp_a_SOURCES += irq/irq.c
 libbsp_a_SOURCES += irq/irq-dispatch.c
 

c/src/lib/libbsp/arm/lpc24xx/include/irq.h

@@ -133,8 +133,6 @@ void lpc24xx_irq_set_priority(rtems_vector_number vector, unsigned priority);
 
 unsigned lpc24xx_irq_get_priority(rtems_vector_number vector);
 
-void bsp_interrupt_dispatch(void);
-
 #endif /* ASM */
 
 /** @} */

c/src/lib/libbsp/arm/lpc24xx/irq/irq-dispatch.c

@@ -20,36 +20,29 @@
  * http://www.rtems.com/license/LICENSE.
  */
 
-#include <rtems/score/armv7m.h>
-
 #include <bsp.h>
 #include <bsp/irq.h>
 #include <bsp/irq-generic.h>
 #include <bsp/lpc24xx.h>
 
+#ifdef ARM_MULTILIB_ARCH_V4
+
 void bsp_interrupt_dispatch(void)
 {
-  #ifdef ARM_MULTILIB_ARCH_V4
+  /* Read current vector number */
-    /* Read current vector number */
+  rtems_vector_number vector = VICVectAddr;
-    rtems_vector_number vector = VICVectAddr;
 
-    /* Enable interrupts in program status register */
+  /* Enable interrupts in program status register */
-    uint32_t psr = arm_status_irq_enable();
+  uint32_t psr = arm_status_irq_enable();
 
-    /* Dispatch interrupt handlers */
+  /* Dispatch interrupt handlers */
-    bsp_interrupt_handler_dispatch(vector);
+  bsp_interrupt_handler_dispatch(vector);
 
-    /* Restore program status register */
+  /* Restore program status register */
-    arm_status_restore(psr);
+  arm_status_restore(psr);
 
-    /* Acknowledge interrupt */
+  /* Acknowledge interrupt */
-    VICVectAddr = 0;
+  VICVectAddr = 0;
-  #else
-    rtems_vector_number vector =
-      ARMV7M_SCB_ICSR_VECTACTIVE_GET(_ARMV7M_SCB->icsr);
-
-    _ARMV7M_Interrupt_service_enter();
-    bsp_interrupt_handler_dispatch(ARMV7M_IRQ_OF_VECTOR(vector));
-    _ARMV7M_Interrupt_service_leave();
-  #endif
 }
+
+#endif /* ARM_MULTILIB_ARCH_V4 */

c/src/lib/libbsp/arm/lpc24xx/irq/irq.c

@@ -61,86 +61,61 @@ unsigned lpc24xx_irq_get_priority(rtems_vector_number vector)
   }
 }
 
+#ifdef ARM_MULTILIB_ARCH_V4
+
 rtems_status_code bsp_interrupt_vector_enable(rtems_vector_number vector)
 {
-  #ifdef ARM_MULTILIB_ARCH_V4
+  VICIntEnable = 1U << vector;
-    VICIntEnable = 1U << vector;
-  #else
-    _ARMV7M_NVIC_Set_enable((int) vector);
-  #endif
 
   return RTEMS_SUCCESSFUL;
 }
 
 rtems_status_code bsp_interrupt_vector_disable(rtems_vector_number vector)
 {
-  #ifdef ARM_MULTILIB_ARCH_V4
+  VICIntEnClear = 1U << vector;
-    VICIntEnClear = 1U << vector;
-  #else
-    _ARMV7M_NVIC_Clear_enable((int) vector);
-  #endif
 
   return RTEMS_SUCCESSFUL;
 }
 
 rtems_status_code bsp_interrupt_facility_initialize(void)
 {
-  #ifdef ARM_MULTILIB_ARCH_V4
+  volatile uint32_t *addr = VICVectAddrBase;
-    volatile uint32_t *addr = VICVectAddrBase;
+  volatile uint32_t *prio = VICVectPriorityBase;
-    volatile uint32_t *prio = VICVectPriorityBase;
+  rtems_vector_number i = 0;
-    rtems_vector_number i = 0;
 
-    /* Disable all interrupts */
+  /* Disable all interrupts */
-    VICIntEnClear = 0xffffffff;
+  VICIntEnClear = 0xffffffff;
 
-    /* Clear all software interrupts */
+  /* Clear all software interrupts */
-    VICSoftIntClear = 0xffffffff;
+  VICSoftIntClear = 0xffffffff;
 
-    /* Use IRQ category */
+  /* Use IRQ category */
-    VICIntSelect = 0;
+  VICIntSelect = 0;
 
-    for (i = BSP_INTERRUPT_VECTOR_MIN; i <= BSP_INTERRUPT_VECTOR_MAX; ++i) {
+  for (i = BSP_INTERRUPT_VECTOR_MIN; i <= BSP_INTERRUPT_VECTOR_MAX; ++i) {
-      /* Use the vector address register to store the vector number */
+    /* Use the vector address register to store the vector number */
-      addr [i] = i;
+    addr [i] = i;
 
-      /* Give vector lowest priority */
+    /* Give vector lowest priority */
-      prio [i] = 15;
+    prio [i] = 15;
-    }
+  }
 
-    /* Reset priority mask register */
+  /* Reset priority mask register */
-    VICSWPrioMask = 0xffff;
+  VICSWPrioMask = 0xffff;
 
-    /* Acknowledge interrupts for all priorities */
+  /* Acknowledge interrupts for all priorities */
-    for (
+  for (
-      i = LPC24XX_IRQ_PRIORITY_VALUE_MIN;
+    i = LPC24XX_IRQ_PRIORITY_VALUE_MIN;
-      i <= LPC24XX_IRQ_PRIORITY_VALUE_MAX;
+    i <= LPC24XX_IRQ_PRIORITY_VALUE_MAX;
-      ++i
+    ++i
-    ) {
+  ) {
-      VICVectAddr = 0;
+    VICVectAddr = 0;
-    }
+  }
 
-    /* Install the IRQ exception handler */
+  /* Install the IRQ exception handler */
-    _CPU_ISR_install_vector(ARM_EXCEPTION_IRQ, arm_exc_interrupt, NULL);
+  _CPU_ISR_install_vector(ARM_EXCEPTION_IRQ, arm_exc_interrupt, NULL);
-  #else
-    rtems_vector_number i = 0;
-    ARMV7M_Exception_handler *vector_table =
-      (ARMV7M_Exception_handler *) bsp_vector_table_begin;
-
-    memcpy(
-      vector_table,
-      bsp_start_vector_table_begin,
-      (size_t) bsp_vector_table_size
-    );
-
-    for (i = BSP_INTERRUPT_VECTOR_MIN; i <= BSP_INTERRUPT_VECTOR_MAX; ++i) {
-      vector_table [ARMV7M_VECTOR_IRQ(i)] = bsp_interrupt_dispatch;
-      _ARMV7M_NVIC_Clear_enable(i);
-      _ARMV7M_NVIC_Clear_pending(i);
-      lpc24xx_irq_set_priority(i, LPC24XX_IRQ_PRIORITY_VALUE_MAX - 1);
-    }
-
-    _ARMV7M_SCB->vtor = vector_table;
-  #endif
 
   return RTEMS_SUCCESSFUL;
 }
+
+#endif /* ARM_MULTILIB_ARCH_V4 */

c/src/lib/libbsp/arm/lpc24xx/preinstall.am

@@ -101,6 +101,10 @@ $(PROJECT_INCLUDE)/bsp/lpc-lcd.h: ../shared/lpc/include/lpc-lcd.h $(PROJECT_INCL
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/lpc-lcd.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/lpc-lcd.h
 
+$(PROJECT_INCLUDE)/bsp/armv7m-irq.h: ../shared/armv7m/include/armv7m-irq.h $(PROJECT_INCLUDE)/bsp/$(dirstamp)
+	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/armv7m-irq.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/armv7m-irq.h
+
 $(PROJECT_INCLUDE)/bsp/dma.h: include/dma.h $(PROJECT_INCLUDE)/bsp/$(dirstamp)
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/dma.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/dma.h

c/src/lib/libbsp/arm/shared/armv7m/include/armv7m-irq.h

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2012 Sebastian Huber.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#ifndef LIBBSP_ARM_SHARED_ARMV7M_IRQ_H
+#define LIBBSP_ARM_SHARED_ARMV7M_IRQ_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void _ARMV7M_NVIC_Interrupt_dispatch(void);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* LIBBSP_ARM_SHARED_ARMV7M_IRQ_H */

c/src/lib/libbsp/arm/shared/armv7m/irq/armv7m-irq-dispatch.c

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2011-2012 Sebastian Huber.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#include <rtems/score/armv7m.h>
+
+#include <bsp/irq-generic.h>
+#include <bsp/armv7m-irq.h>
+
+#ifdef ARM_MULTILIB_ARCH_V7M
+
+void _ARMV7M_NVIC_Interrupt_dispatch(void)
+{
+  rtems_vector_number vector =
+    ARMV7M_SCB_ICSR_VECTACTIVE_GET(_ARMV7M_SCB->icsr);
+
+  _ARMV7M_Interrupt_service_enter();
+  bsp_interrupt_handler_dispatch(ARMV7M_IRQ_OF_VECTOR(vector));
+  _ARMV7M_Interrupt_service_leave();
+}
+
+#endif /* ARM_MULTILIB_ARCH_V7M */

c/src/lib/libbsp/arm/shared/armv7m/irq/armv7m-irq.c

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2011-2012 Sebastian Huber.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#include <rtems/score/armv7m.h>
+
+#include <bsp.h>
+#include <bsp/irq.h>
+#include <bsp/irq-generic.h>
+#include <bsp/linker-symbols.h>
+#include <bsp/armv7m-irq.h>
+
+#ifdef ARM_MULTILIB_ARCH_V7M
+
+rtems_status_code bsp_interrupt_vector_enable(rtems_vector_number vector)
+{
+  _ARMV7M_NVIC_Set_enable((int) vector);
+
+  return RTEMS_SUCCESSFUL;
+}
+
+rtems_status_code bsp_interrupt_vector_disable(rtems_vector_number vector)
+{
+  _ARMV7M_NVIC_Clear_enable((int) vector);
+
+  return RTEMS_SUCCESSFUL;
+}
+
+rtems_status_code bsp_interrupt_facility_initialize(void)
+{
+  int i;
+  ARMV7M_Exception_handler *vector_table =
+    (ARMV7M_Exception_handler *) bsp_vector_table_begin;
+
+  memcpy(
+    vector_table,
+    bsp_start_vector_table_begin,
+    (size_t) bsp_vector_table_size
+  );
+
+  for (i = BSP_INTERRUPT_VECTOR_MIN; i <= BSP_INTERRUPT_VECTOR_MAX; ++i) {
+    vector_table [ARMV7M_VECTOR_IRQ(i)] = _ARMV7M_NVIC_Interrupt_dispatch;
+    _ARMV7M_NVIC_Clear_enable(i);
+    _ARMV7M_NVIC_Clear_pending(i);
+    _ARMV7M_NVIC_Set_priority(i, ARMV7M_EXCEPTION_PRIORITY_LOWEST);
+  }
+
+  _ARMV7M_SCB->vtor = vector_table;
+
+  return RTEMS_SUCCESSFUL;
+}
+
+#endif /* ARM_MULTILIB_ARCH_V7M */