FreeRTOS Ported to RH850

mikisama · July 25, 2022, 8:30am

Well, I now know what multiple interrupts is. Before I only knew it by another name, interrupt nesting, which is already enabled.

github.com

mikisama/FreeRTOS_RH850/blob/ccc9f3a77f2cfba4be251308d7eb5b829ccb344d/freertos/portable/CCRH/RH850/portasm.s#L138


      
              mov #_pxCurrentTCB, r2              ;     pxCurrentTCB->pxTopOfStack = SP
              ld.w 0[r2], r2                      ;     SP = MainStackTop
              st.w sp, 0[r2]                      ; }
              mov #__E_stack_bss, sp
          aa:
              add 0x1, r7                         ; xInterruptNesting++
              st.w r7, 0[r6]
          
          
    stsr EIIC, r6                       ; Save EI level Interrupt Cause
          
          
    ei                                  ; Enable interrupt (enable interrupt nesting)
              jarl _vISRHandler, lp               ; Call the ISR Handler
              di                                  ; Disable interrupt (disable interrupt nesting)
          
          
    mov #_xInterruptNesting, r6
              ld.w 0[r6], r7
              cmp 0x0, r7                         ; if ( xInterruptNesting > 0 )
              be bb                               ; {
              add -1, r7                          ;     xInterruptNesting--
              st.w r7, 0[r6]                      ; }
          bb: