diff options
Diffstat (limited to 'cpukit/score/cpu/moxie/cpu_asm.S')
| -rw-r--r-- | cpukit/score/cpu/moxie/cpu_asm.S | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/cpukit/score/cpu/moxie/cpu_asm.S b/cpukit/score/cpu/moxie/cpu_asm.S new file mode 100644 index 0000000000..31d203934e --- /dev/null +++ b/cpukit/score/cpu/moxie/cpu_asm.S @@ -0,0 +1,117 @@ +/* + * 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.com/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 + |