[PATCH 4/6] bsp/lpc32xx: bsp_interrupt_is_valid_vector()

[Sebastian Huber]

Provide custom bsp_interrupt_is_valid_vector() implementation since
several interrupt vectors are reserved.
---
 bsps/arm/lpc32xx/include/bsp/irq.h |  4 ++++
 bsps/arm/lpc32xx/irq/irq.c         | 27 +++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/bsps/arm/lpc32xx/include/bsp/irq.h b/bsps/arm/lpc32xx/include/bsp/irq.h
index d8ad65b3d2..255c556a96 100644
--- a/bsps/arm/lpc32xx/include/bsp/irq.h
+++ b/bsps/arm/lpc32xx/include/bsp/irq.h
@@ -136,8 +136,12 @@ extern "C" {
 
 #define BSP_INTERRUPT_VECTOR_COUNT (LPC32XX_IRQ_SYSCLK + 1)
 
+#define BSP_INTERRUPT_CUSTOM_VALID_VECTOR
+
 #define LPC32XX_IRQ_COUNT BSP_INTERRUPT_VECTOR_COUNT
 
+bool bsp_interrupt_is_valid_vector(rtems_vector_number vector);
+
 void lpc32xx_irq_set_priority(rtems_vector_number vector, unsigned priority);
 
 unsigned lpc32xx_irq_get_priority(rtems_vector_number vector);
diff --git a/bsps/arm/lpc32xx/irq/irq.c b/bsps/arm/lpc32xx/irq/irq.c
index 947faca52c..a62eee6dd5 100644
--- a/bsps/arm/lpc32xx/irq/irq.c
+++ b/bsps/arm/lpc32xx/irq/irq.c
@@ -41,6 +41,14 @@ static lpc32xx_irq_fields lpc32xx_irq_priority_masks [LPC32XX_IRQ_PRIORITY_COUNT
 
 static lpc32xx_irq_fields lpc32xx_irq_enable;
 
+static const lpc32xx_irq_fields lpc32xx_irq_is_valid = {
+  .field = {
+    .mic = 0x3fffeff8U,
+    .sic_1 = 0xffde71d6U,
+    .sic_2 = 0x9fdc9fffU
+  }
+};
+
 static inline bool lpc32xx_irq_priority_is_valid(unsigned priority)
 {
   return priority <= LPC32XX_IRQ_PRIORITY_LOWEST;
@@ -84,6 +92,16 @@ static inline void lpc32xx_irq_clear_bit_in_register(unsigned index, unsigned re
   *reg &= ~(1U << bit);
 }
 
+static inline bool lpc32xx_irq_is_bit_set_in_field(
+  unsigned index,
+  const lpc32xx_irq_fields *fields
+)
+{
+  LPC32XX_IRQ_BIT_OPS_DEFINE;
+
+  return fields->fields_table [module] & (1U << bit);
+}
+
 static inline void lpc32xx_irq_set_bit_in_field(unsigned index, lpc32xx_irq_fields *fields)
 {
   LPC32XX_IRQ_BIT_OPS_DEFINE;
@@ -98,6 +116,15 @@ static inline void lpc32xx_irq_clear_bit_in_field(unsigned index, lpc32xx_irq_fi
   fields->fields_table [module] &= ~(1U << bit);
 }
 
+bool bsp_interrupt_is_valid_vector(rtems_vector_number vector)
+{
+  if (vector >= BSP_INTERRUPT_VECTOR_COUNT) {
+    return false;
+  }
+
+  return lpc32xx_irq_is_bit_set_in_field(vector, &lpc32xx_irq_is_valid);
+}
+
 static inline unsigned lpc32xx_irq_get_index(uint32_t val)
 {
   ARM_SWITCH_REGISTERS;
-- 
2.35.3