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author | Jeffrey O. Hill <hill@wombat.lanl.gov> | 2013-02-05 18:10:32 +0100 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2013-03-11 17:57:41 +0100 |
commit | 3ac61e52627c62e1641f954688c4327ca2170dc5 (patch) | |
tree | f38e588a8c0120371446f2cb53664fc3b866a381 /cpukit/score/cpu/nios2/irq.c | |
parent | nios2: Add optimized IP checksum support (diff) | |
download | rtems-3ac61e52627c62e1641f954688c4327ca2170dc5.tar.bz2 |
nios2: Rename file
Diffstat (limited to 'cpukit/score/cpu/nios2/irq.c')
-rw-r--r-- | cpukit/score/cpu/nios2/irq.c | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/cpukit/score/cpu/nios2/irq.c b/cpukit/score/cpu/nios2/irq.c deleted file mode 100644 index 5750f1311f..0000000000 --- a/cpukit/score/cpu/nios2/irq.c +++ /dev/null @@ -1,137 +0,0 @@ -/** - * @file - * - * @brief NIOS2 Exception and Interrupt Handler - * - * @note Derived from c4x/irq.c - */ - -/* - * COPYRIGHT (c) 1989-2007. - * On-Line Applications Research Corporation (OAR). - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.com/license/LICENSE. - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include <rtems/system.h> -#include <rtems/score/cpu.h> -#include <rtems/score/isr.h> -#include <rtems/score/thread.h> -#include <rtems/score/nios2-utility.h> - -/* - * This routine provides the RTEMS interrupt management. - * - * Upon entry, interrupts are disabled - */ - -#if( CPU_HAS_SOFTWARE_INTERRUPT_STACK == TRUE) - unsigned long *_old_stack_ptr; -#endif - -register unsigned long *stack_ptr __asm__ ("sp"); - -RTEMS_INLINE_ROUTINE void __IIC_Handler(void) -{ - uint32_t active; - uint32_t mask; - uint32_t vector; - - /* - * Obtain from the interrupt controller a bit list of pending interrupts, - * and then process the highest priority interrupt. This process loops, - * loading the active interrupt list on each pass until ipending - * return zero. - * - * The maximum interrupt latency for the highest priority interrupt is - * reduced by finding out which interrupts are pending as late as possible. - * Consider the case where the high priority interupt is asserted during - * the interrupt entry sequence for a lower priority interrupt to see why - * this is the case. - */ - - active = _Nios2_Get_ctlreg_ipending(); - - while (active) - { - vector = 0; - mask = 1; - - /* - * Test each bit in turn looking for an active interrupt. Once one is - * found call it to clear the interrupt condition. - */ - - while (active) - { - if (active & mask) - { - if ( _ISR_Vector_table[ vector] ) - (*_ISR_Vector_table[ vector ])(vector, NULL); - active &= ~mask; - } - mask <<= 1; - ++vector; - }; - - active = _Nios2_Get_ctlreg_ipending(); - } - -} - -void __ISR_Handler(void) -{ - register uint32_t level; - - /* Interrupts are disabled upon entry to this Handler */ - -#if( CPU_HAS_SOFTWARE_INTERRUPT_STACK == TRUE) - if ( _ISR_Nest_level == 0 ) { - /* Install irq stack */ - _old_stack_ptr = stack_ptr; - stack_ptr = _CPU_Interrupt_stack_high - 4; - } -#endif - - _ISR_Nest_level++; - - _Thread_Dispatch_increment_disable_level(); - - __IIC_Handler(); - - /* Make sure that interrupts are disabled again */ - _CPU_ISR_Disable( level ); - - _Thread_Dispatch_decrement_disable_level(); - - _ISR_Nest_level--; - - if( _ISR_Nest_level == 0) { -#if( CPU_HAS_SOFTWARE_INTERRUPT_STACK == TRUE) - stack_ptr = _old_stack_ptr; -#endif - - if( !_Thread_Dispatch_in_critical_section() ) - { - if ( _Thread_Dispatch_necessary ) { - _CPU_ISR_Enable( level ); - _Thread_Dispatch(); - /* may have switched to another task and not return here immed. */ - _CPU_ISR_Disable( level ); /* Keep _pairs_ of Enable/Disable */ - } - } - } - - _CPU_ISR_Enable( level ); -} - -void __Exception_Handler(CPU_Exception_frame *efr) -{ - _CPU_Fatal_halt(0xECC0); -} |