1 files changed, 132 insertions, 0 deletions
diff --git a/libcpu/rx/context_iar.S b/libcpu/rx/context_iar.S
new file mode 100644
index 0000000000..143ae00315
--- /dev/null
+++ b/libcpu/rx/context_iar.S
@@ -0,0 +1,132 @@
+#include "cpuconfig.h"
+
+//#include "iorx62n.h"
+    EXTERN _rt_thread_switch_interrupt_flag
+    EXTERN _rt_interrupt_from_thread
+    EXTERN _rt_interrupt_to_thread
+    EXTERN _rt_hw_hard_fault_exception
+    EXTERN _rt_hw_cpu_shutdown 
+    
+    /*PUBLIC _Interrupt_SWINT*/
+    PUBLIC ___interrupt_27
+    PUBLIC ___interrupt_0
+    RSEG CODE:CODE(4)
+
+;/*
+; * rt_base_t rt_hw_interrupt_disable();
+; */
+    PUBLIC _rt_hw_interrupt_disable
+_rt_hw_interrupt_disable:
+     MVTIPL      #MAX_SYSCALL_INTERRUPT_PRIORITY
+     RTS
+
+;/*
+; * void rt_hw_interrupt_enable(rt_base_t level);
+; */
+    PUBLIC  _rt_hw_interrupt_enable
+_rt_hw_interrupt_enable:
+     MVTIPL     #KERNEL_INTERRUPT_PRIORITY
+     RTS
+
+; r0 --> swith from thread stack
+; r1 --> swith to thread stack
+; psr, pc, lr, r12, r3, r2, r1, r0 are pushed into [from] stack
+___interrupt_27:
+
+/* enable interrupt because enter the interrupt,it will be clear */
+    SETPSW   I
+    MVTIPL   #MAX_SYSCALL_INTERRUPT_PRIORITY
+    PUSH.L   R15
+
+/* justage if it should switch thread*/
+    MOV.L    #_rt_thread_switch_interrupt_flag, R15
+    MOV.L    [ R15 ], R15
+    CMP      #0, R15
+    BEQ      notask_exit
+/* clean the flag*/
+    MOV.L    #_rt_thread_switch_interrupt_flag, R15
+    MOV.L    #0, [ R15 ]
+
+/* justage if it should save the register*/
+    MOV.L    #_rt_interrupt_from_thread, R15
+    MOV.L    [ R15 ], R15
+    CMP      #0, R15
+    BEQ      need_modify_isp
+    /*save register*/
+    MVFC     USP, R15
+    SUB      #12, R15
+    MVTC     R15, USP
+    MOV.L    [ R0 ], [ R15 ] ;PSW
+    MOV.L    4[ R0 ], 4[ R15 ];PC
+    MOV.L    8[ R0 ], 8[ R15 ] ;R15
+    ADD      #12, R0
+    SETPSW   U
+    PUSHM    R1-R14
+    MVFC     FPSW, R15
+    PUSH.L   R15
+    MVFACHI  R15
+    PUSH.L   R15
+    MVFACMI  R15 ; Middle order word.
+    SHLL     #16, R15 ; Shifted left as it is restored to the low orde  r w
+    PUSH.L   R15
+    /*save thread stack pointer and switch to new thread*/
+    MOV.L    #_rt_interrupt_from_thread, R15
+    MOV.L    [ R15 ], R15
+    MOV.L    R0, [ R15 ]
+    BRA      swtich_to_thread
+need_modify_isp:
+    MVFC     ISP, R15                
+    ADD      #12, R15
+    MVTC     R15, ISP
+swtich_to_thread:
+    SETPSW   U
+    MOV.L    #_rt_interrupt_to_thread, R15
+    MOV.L    [ R15 ], R15
+    MOV.L    [ R15 ], R0
+    POP      R15
+    MVTACLO  R15
+    POP      R15
+    MVTACHI  R15
+    POP      R15
+    MVTC     R15, FPSW
+    POPM     R1-R15
+    BRA      pendsv_exit
+notask_exit:
+    POP     R15
+pendsv_exit:
+
+     MVTIPL     #KERNEL_INTERRUPT_PRIORITY
+     RTE
+     NOP
+     NOP
+/*exception interrupt*/ 
+___interrupt_0:
+    PUSH.L   R15
+    /*save the register for infomation*/
+    MVFC     USP, R15
+    SUB      #12, R15
+    MVTC     R15, USP
+    MOV.L    [ R0 ], [ R15 ] ;PSW
+    MOV.L    4[ R0 ], 4[ R15 ];PC
+    MOV.L    8[ R0 ], 8[ R15 ] ;R15
+    ADD      #12, R0
+    SETPSW   U
+    PUSHM    R1-R14
+    MVFC     FPSW, R15
+    PUSH.L   R15
+    MVFACHI  R15
+    PUSH.L   R15
+    MVFACMI  R15 ; Middle order word.
+    SHLL     #16, R15 ; Shifted left as it is restored to the low orde  r w
+    PUSH.L   R15
+    /*save the exception infomation add R1 as a parameter of
+	* function rt_hw_hard_fault_exception
+	*/
+     MOV.L    R0, R1
+     BRA _rt_hw_hard_fault_exception   
+     BRA _rt_hw_cpu_shutdown 
+     RTE
+     NOP
+     NOP
+     END
+