riscv: Rework exception handling

Remove _CPU_ISR_install_raw_handler() and _CPU_ISR_install_vector()
functions.  Applications can install an exception handler via the fatal
error handler to handle synchronous exceptions.

Handle interrupt exceptions via _RISCV_Interrupt_dispatch() which must
be provided by the BSP.

Update #3433.

1 files changed, 7 insertions, 0 deletions

diff --git a/cpukit/score/cpu/riscv/include/rtems/score/cpuimpl.h b/cpukit/score/cpu/riscv/include/rtems/score/cpuimpl.h
index cb60a528de..313b671da0 100644
--- a/cpukit/score/cpu/riscv/include/rtems/score/cpuimpl.h
+++ b/cpukit/score/cpu/riscv/include/rtems/score/cpuimpl.h
@@ -289,6 +289,13 @@ typedef struct {
 } CPU_Per_CPU_control;
 #endif
 
+struct Per_CPU_Control;
+
+void _RISCV_Interrupt_dispatch(
+  uintptr_t               mcause,
+  struct Per_CPU_Control *cpu_self
+);
+
 static inline uint32_t _RISCV_Read_FCSR( void )
 {
   uint32_t fcsr;