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Joel Sherrill
7c4c284c4a
* cpu.h: corrected the registers in Context_Control and in CPU_Interrupt_frame to correspond to the saved frame in cpu_asm.S Also switched on CPU_ISR_PASSES_FRAME_POINTER. * cpu_asm.S: Moved the restore part of _CPU_Context_switch for easier reading. Fixed _CPU_Context_restore, it now moves the argument and branches to a label in _CPU_Context_switch. Removed unnecessary saves of registers in context switch and irq handling. Rewrote irq code to call the C helper. Added some documentation * irq.c: New file derived from c4x and nios2.