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Diffstat (limited to '')
| -rw-r--r-- | c/src/exec/score/cpu/c4x/cpu.c | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/c/src/exec/score/cpu/c4x/cpu.c b/c/src/exec/score/cpu/c4x/cpu.c deleted file mode 100644 index 44d43f837a..0000000000 --- a/c/src/exec/score/cpu/c4x/cpu.c +++ /dev/null @@ -1,199 +0,0 @@ -/* - * C4x CPU Dependent Source - * - * - * COPYRIGHT (c) 1989-1999. - * 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.OARcorp.com/rtems/license.html. - * - * $Id$ - */ - -#include <rtems/system.h> -#include <rtems/score/isr.h> -#include <rtems/score/wkspace.h> - - -/* _CPU_Initialize - * - * This routine performs processor dependent initialization. - * - * INPUT PARAMETERS: - * cpu_table - CPU table to initialize - * thread_dispatch - address of disptaching routine - * - * C4x Specific Information: - * - */ - -void _CPU_Initialize( - rtems_cpu_table *cpu_table, - void (*thread_dispatch) /* ignored on this CPU */ -) -{ -#if 0 - /* - * The thread_dispatch argument is the address of the entry point - * for the routine called at the end of an ISR once it has been - * decided a context switch is necessary. On some compilation - * systems it is difficult to call a high-level language routine - * from assembly. This allows us to trick these systems. - * - * If you encounter this problem save the entry point in a CPU - * dependent variable. - */ - - _CPU_Thread_dispatch_pointer = thread_dispatch; -#endif - -#if (CPU_HARDWARE_FP == TRUE) - /* - * If there is not an easy way to initialize the FP context - * during Context_Initialize, then it is usually easier to - * save an "uninitialized" FP context here and copy it to - * the task's during Context_Initialize. - */ - - /* FP context initialization support goes here */ -#endif - - _CPU_Table = *cpu_table; -} - -/*PAGE - * - * _CPU_ISR_install_raw_handler - * - * C4x Specific Information: - * - */ - -void _CPU_ISR_install_raw_handler( - unsigned32 vector, - proc_ptr new_handler, - proc_ptr *old_handler -) -{ - void **ittp; - - /* - * This is where we install the interrupt handler into the "raw" interrupt - * table used by the CPU to dispatch interrupt handlers. - */ - - ittp = c4x_get_ittp(); - *old_handler = ittp[ vector ]; - ittp[ vector ] = new_handler; -} - -/*XXX */ - -#define C4X_CACHE 1 -#define C4X_BASE_ST (C4X_CACHE==1) ? 0x4800 : 0x4000 - -void _CPU_Context_Initialize( - Context_Control *_the_context, - void *_stack_base, - unsigned32 _size, - unsigned32 _isr, - void (*_entry_point)(void), - int _is_fp -) -{ - unsigned int *_stack; - _stack = (unsigned int *)_stack_base; - - *_stack = (unsigned int) _entry_point; - _the_context->sp = (unsigned int) _stack; - _the_context->st = C4X_BASE_ST; - if ( _isr == 0 ) - _the_context->st |= C4X_ST_GIE; -} - -/*PAGE - * - * _CPU_ISR_install_vector - * - * This kernel routine installs the RTEMS handler for the - * specified vector. - * - * Input parameters: - * vector - interrupt vector number - * old_handler - former ISR for this vector number - * new_handler - replacement ISR for this vector number - * - * Output parameters: NONE - * - * - * C4x Specific Information: - * - */ - -void _CPU_ISR_install_vector( - unsigned32 vector, - proc_ptr new_handler, - proc_ptr *old_handler -) -{ - proc_ptr ignored; - extern void rtems_irq_prologue_0(void); - extern void rtems_irq_prologue_1(void); - void *entry; - - *old_handler = _ISR_Vector_table[ vector ]; - - /* - * If the interrupt vector table is a table of pointer to isr entry - * points, then we need to install the appropriate RTEMS interrupt - * handler for this vector number. - */ - - entry = (void *)rtems_irq_prologue_0 + - ((rtems_irq_prologue_1 - rtems_irq_prologue_0) * vector); - _CPU_ISR_install_raw_handler( vector, entry, &ignored ); - - /* - * We put the actual user ISR address in '_ISR_vector_table'. This will - * be used by the _ISR_Handler so the user gets control. - */ - - _ISR_Vector_table[ vector ] = new_handler; -} - -/*PAGE - * - * _CPU_Thread_Idle_body - * - * NOTES: - * - * 1. This is the same as the regular CPU independent algorithm. - * - * 2. If you implement this using a "halt", "idle", or "shutdown" - * instruction, then don't forget to put it in an infinite loop. - * - * 3. Be warned. Some processors with onboard DMA have been known - * to stop the DMA if the CPU were put in IDLE mode. This might - * also be a problem with other on-chip peripherals. So use this - * hook with caution. - * - * C4x Specific Information: - * - * - */ - -#if (CPU_PROVIDES_IDLE_THREAD_BODY == 1) -void _CPU_Thread_Idle_body( void ) -{ - - for( ; ; ) { - __asm__( "idle" ); - __asm__( "nop" ); - __asm__( "nop" ); - __asm__( "nop" ); - /* insert your "halt" instruction here */ ; - } -} -#endif |