diff options
Diffstat (limited to 'c/src/lib/libbsp/sh/gensh2/startup/cpu_asm.c')
| -rw-r--r-- | c/src/lib/libbsp/sh/gensh2/startup/cpu_asm.c | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/c/src/lib/libbsp/sh/gensh2/startup/cpu_asm.c b/c/src/lib/libbsp/sh/gensh2/startup/cpu_asm.c deleted file mode 100644 index 47bc859dbd..0000000000 --- a/c/src/lib/libbsp/sh/gensh2/startup/cpu_asm.c +++ /dev/null @@ -1,182 +0,0 @@ -/* - * This file contains the basic algorithms for all assembly code used - * in an specific CPU port of RTEMS. These algorithms must be implemented - * in assembly language - * - * NOTE: This port uses a C file with inline assembler instructions - * - * Authors: Ralf Corsepius (corsepiu@faw.uni-ulm.de) and - * Bernd Becker (becker@faw.uni-ulm.de) - * - * COPYRIGHT (c) 1997-1998, FAW Ulm, Germany - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. - * - * - * COPYRIGHT (c) 1998. - * 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.org/license/LICENSE. - */ - -/* - * This is supposed to be an assembly file. This means that system.h - * and cpu.h should not be included in a "real" cpu_asm file. An - * implementation in assembly should include "cpu_asm.h" - */ - -#include <rtems/system.h> -#include <rtems/score/cpu.h> -#include <rtems/score/isr.h> -#include <rtems/score/threaddispatch.h> -#include <rtems/score/sh.h> - -#include <rtems/score/ispsh7045.h> -#include <rtems/score/iosh7045.h> -#include <rtems/score/sh_io.h> - -/* from cpu_isps.c */ -extern proc_ptr _Hardware_isr_Table[]; - -#if (CPU_HAS_SOFTWARE_INTERRUPT_STACK == TRUE) - unsigned long *_old_stack_ptr; -#endif - -register unsigned long *stack_ptr __asm__ ("r15"); - -/* - * sh_set_irq_priority - * - * this function sets the interrupt level of the specified interrupt - * - * parameters: - * - irq : interrupt number - * - prio: priority to set for this interrupt number - * - * returns: 0 if ok - * -1 on error - */ - -unsigned int sh_set_irq_priority( - unsigned int irq, - unsigned int prio ) -{ - uint32_t shiftcount; - uint32_t prioreg; - uint16_t temp16; - ISR_Level level; - - /* - * first check for valid interrupt - */ - if (( irq > 156) || (irq < 64) || (_Hardware_isr_Table[irq] == _dummy_isp)) - return -1; - /* - * check for valid irq priority - */ - if ( prio > 15 ) - return -1; - - /* - * look up appropriate interrupt priority register - */ - if ( irq > 71) - { - irq = irq - 72; - shiftcount = 12 - ((irq & ~0x03) % 16); - - switch( irq / 16) - { - case 0: { prioreg = INTC_IPRC; break;} - case 1: { prioreg = INTC_IPRD; break;} - case 2: { prioreg = INTC_IPRE; break;} - case 3: { prioreg = INTC_IPRF; break;} - case 4: { prioreg = INTC_IPRG; break;} - case 5: { prioreg = INTC_IPRH; break;} - default: return -1; - } - } - else - { - shiftcount = 12 - 4 * ( irq % 4); - if ( irq > 67) - prioreg = INTC_IPRB; - else - prioreg = INTC_IPRA; - } - - /* - * Set the interrupt priority register - */ - _ISR_Local_disable( level ); - - temp16 = read16( prioreg); - temp16 &= ~( 15 << shiftcount); - temp16 |= prio << shiftcount; - write16( temp16, prioreg); - - _ISR_Local_enable( level ); - - return 0; -} - -/* - * This routine provides the RTEMS interrupt management. - */ - -void __ISR_Handler( uint32_t vector) -{ - ISR_Level level; - - _ISR_Local_disable( level ); - - _Thread_Dispatch_disable(); - -#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; - } - -#endif - - _ISR_Nest_level++; - - _ISR_Local_enable( level ); - - /* call isp */ - if ( _ISR_Vector_table[ vector]) - (*_ISR_Vector_table[ vector ])( vector ); - - _ISR_Local_disable( level ); - - _Thread_Dispatch_unnest( _Per_CPU_Get() ); - - _ISR_Nest_level--; - -#if (CPU_HAS_SOFTWARE_INTERRUPT_STACK == TRUE) - - if ( _ISR_Nest_level == 0 ) - /* restore old stack pointer */ - stack_ptr = _old_stack_ptr; -#endif - - _ISR_Local_enable( level ); - - if ( _ISR_Nest_level ) - return; - - if ( !_Thread_Dispatch_is_enabled() ) { - return; - } - - if ( _Thread_Dispatch_necessary ) { - _Thread_Dispatch(); - } -} |