arch: inline up_interrupt_context()

inline the up_interrupt_context() to avoid unnecessary stack pushes

Signed-off-by: chao.an <anchao@xiaomi.com>

arch/or1k/include/irq.h

@@ -29,6 +29,11 @@
  * Included Files
  ****************************************************************************/
 
+#include <sys/types.h>
+#ifndef __ASSEMBLY__
+#  include <stdbool.h>
+#endif
+
 /* Include NuttX-specific IRQ definitions */
 
 #include <nuttx/irq.h>
@@ -37,4 +42,90 @@
 
 #include <arch/chip/irq.h>
 
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/* g_current_regs[] holds a references to the current interrupt level
+ * register storage structure.  If is non-NULL only during interrupt
+ * processing.  Access to g_current_regs[] must be through the macro
+ * CURRENT_REGS for portability.
+ */
+
+/* For the case of architectures with multiple CPUs, then there must be one
+ * such value for each processor that can receive an interrupt.
+ */
+
+EXTERN volatile uint32_t *g_current_regs[CONFIG_SMP_NCPUS];
+#define CURRENT_REGS (g_current_regs[up_cpu_index()])
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_cpu_index
+ *
+ * Description:
+ *   Return an index in the range of 0 through (CONFIG_SMP_NCPUS-1) that
+ *   corresponds to the currently executing CPU.
+ *
+ * Input Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   An integer index in the range of 0 through (CONFIG_SMP_NCPUS-1) that
+ *   corresponds to the currently executing CPU.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_SMP
+int up_cpu_index(void);
+#else
+#  define up_cpu_index() (0)
+#endif
+
+/****************************************************************************
+ * Inline functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_interrupt_context
+ *
+ * Description:
+ *   Return true is we are currently executing in the interrupt
+ *   handler context.
+ *
+ ****************************************************************************/
+
+static inline bool up_interrupt_context(void)
+{
+#ifdef CONFIG_SMP
+  irqstate_t flags = up_irq_save();
+#endif
+
+  bool ret = CURRENT_REGS != NULL;
+
+#ifdef CONFIG_SMP
+  up_irq_restore(flags);
+#endif
+
+  return ret;
+}
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+#endif /* __ASSEMBLY__ */
+
 #endif /* __ARCH_OR1K_INCLUDE_IRQ_H */