path: root/cpukit/score/cpu/moxie/cpu_asm.S

/*
 * Moxie CPU functions
 *   Copyright (C) 2011 Anthony Green
 *
 *  Based on example code and other ports with this copyright:
 *
 *  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.rtems.org/license/LICENSE.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <rtems/asm.h>

        .text
        .align 2

        .global SYM(_CPU_Context_switch)

SYM(_CPU_Context_switch):
        sto.l   0($r0), $fp
        sto.l   4($r0), $sp
        sto.l   8($r0), $r0
        sto.l   12($r0), $r1
        sto.l   16($r0), $r2
        sto.l   20($r0), $r3
        sto.l   24($r0), $r4
        sto.l   28($r0), $r5
        sto.l   32($r0), $r6
        sto.l   36($r0), $r7
        sto.l   40($r0), $r8
        sto.l   44($r0), $r9
        sto.l   48($r0), $r10
        sto.l   52($r0), $r11
        sto.l   56($r0), $r12
        sto.l   60($r0), $r13

restore:
        ldo.l   $fp, 0($r1)
        ldo.l   $sp, 4($r1)
        ldo.l   $r0, 8($r1)
        ldo.l   $r2, 16($r1)
        ldo.l   $r3, 20($r1)
        ldo.l   $r4, 24($r1)
        ldo.l   $r5, 28($r1)
        ldo.l   $r6, 32($r1)
        ldo.l   $r7, 36($r1)
        ldo.l   $r8, 40($r1)
        ldo.l   $r9, 44($r1)
        ldo.l   $r10, 48($r1)
        ldo.l   $r11, 52($r1)
        ldo.l   $r12, 56($r1)
        ldo.l   $r13, 60($r1)
        ldo.l   $r1, 12($r1)

        ret

        .align 2

        .global SYM(_CPU_Context_restore)

SYM(_CPU_Context_restore):
        mov     $r1, $r0
        jmpa    restore


/*
        VHandler for Vectored Interrupts

        All IRQ's are vectored to routine _ISR_#vector_number
        This routine stacks er0 and loads er0 with vector number
        before transferring to here

*/
        .align 2
        .global SYM(_ISR_Handler)
        .extern SYM(_Vector_table)


SYM(_ISR_Handler):
        brk


/*
        Called from ISR_Handler as a way of ending IRQ
        but allowing dispatch to another task.
        Must use RTE as CCR is still on stack but IRQ has been serviced.
        CCR and PC occupy same word so rte can be used.
        now using task stack
*/

        .align 2
        .global SYM(_ISR_Dispatch)

SYM(_ISR_Dispatch):
        brk


        .align 2
        .global SYM(_CPU_Context_save_fp)

SYM(_CPU_Context_save_fp):
        brk


        .align 2
        .global SYM(_CPU_Context_restore_fp)

SYM(_CPU_Context_restore_fp):
        brk