diff options
Diffstat (limited to 'cpukit/score/cpu/h8300/cpu_asm.S')
| -rw-r--r-- | cpukit/score/cpu/h8300/cpu_asm.S | 221 |
1 files changed, 0 insertions, 221 deletions
diff --git a/cpukit/score/cpu/h8300/cpu_asm.S b/cpukit/score/cpu/h8300/cpu_asm.S deleted file mode 100644 index e0fdf0a252..0000000000 --- a/cpukit/score/cpu/h8300/cpu_asm.S +++ /dev/null @@ -1,221 +0,0 @@ -/* - * Hitachi H8 Score CPU functions - * Copyright Comnet Technologies Ltd 1999 - * - * 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> -#include <rtems/score/percpu.h> - -;.equ RUNCONTEXT_ARG, er0 -;.equ HEIRCONTEXT_ARG, er1 - -/* - * Make sure we tell the assembler what type of CPU model we are - * being compiled for. - */ - -#if defined(__H8300H__) - .h8300h -#endif -#if defined(__H8300S__) - .h8300s -#endif -#if defined(__H8300SX__) - .h8300sx -#endif - .text - - .text -/* - GCC Compiled with optimisations and Wimplicit decs to ensure - that stack from doesn't change - - Supposedly R2 and R3 do not need to be saved but who knows - - Arg1 = er0 (not on stack) - Arg2 = er1 (not on stack) -*/ - - .align 2 - - .global SYM(_CPU_Context_switch) - -SYM(_CPU_Context_switch): - /* Save Context */ -#if defined(__H8300H__) || defined(__H8300S__) || defined(__H8300SX__) - stc.w ccr,@(0:16,er0) - mov.l er7,@(2:16,er0) - mov.l er6,@(6:16,er0) - mov.l er5,@(10:16,er0) - mov.l er4,@(14:16,er0) - mov.l er3,@(18:16,er0) - mov.l er2,@(22:16,er0) - - /* Install New context */ - -restore: - mov.l @(22:16,er1),er2 - mov.l @(18:16,er1),er3 - mov.l @(14:16,er1),er4 - mov.l @(10:16,er1),er5 - mov.l @(6:16,er1),er6 - mov.l @(2:16,er1),er7 - ldc.w @(0:16,er1),ccr -#endif - - rts - - .align 2 - - .global SYM(_CPU_Context_restore) - -SYM(_CPU_Context_restore): - -#if defined(__H8300H__) || defined(__H8300S__) || defined(__H8300SX__) - mov.l er0,er1 - jmp @restore:24 -#endif - - - -/* - 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): -#if defined(__H8300H__) || defined(__H8300S__) || defined(__H8300SX__) - mov.l er1,@-er7 - mov.l er2,@-er7 - mov.l er3,@-er7 - mov.l er4,@-er7 - mov.l er5,@-er7 - mov.l er6,@-er7 - -/* Set IRQ Stack */ - orc #0xc0,ccr - mov.l er7,er6 ; save stack pointer - mov.l @ISR_NEST_LEVEL,er1 - bne nested - mov.l @INTERRUPT_STACK_HIGH,er7 - -nested: - mov.l er6,@-er7 ; save sp so pop regardless of nest level - -;; Inc system counters - mov.l @ISR_NEST_LEVEL,er1 - inc.l #1,er1 - mov.l er1,@ISR_NEST_LEVEL - mov.l @THREAD_DISPATCH_DISABLE_LEVEL,er1 - inc.l #1,er1 - mov.l er1,@THREAD_DISPATCH_DISABLE_LEVEL - -/* Vector to ISR */ - - mov er0,er2 ; copy vector - shll.l er2 - shll.l er2 ; vector = vector * 4 (sizeof(int)) - mov.l @(SYM(_ISR_Vector_table), er2),er1 - jsr @er1 ; er0 = arg1 =vector - - orc #0xc0,ccr - mov.l @ISR_NEST_LEVEL,er1 - dec.l #1,er1 - mov.l er1,@ISR_NEST_LEVEL - mov.l @THREAD_DISPATCH_DISABLE_LEVEL,er1 - dec.l #1,er1 - mov.l er1,@THREAD_DISPATCH_DISABLE_LEVEL - bne exit - - mov.l @DISPATCH_NEEDED,er1 - beq exit ; If no then exit - - /* Context switch here through ISR_Dispatch */ -bframe: - orc #0xc0,ccr -/* Pop Stack */ - mov @er7+,er6 - mov er6,er7 - - /* Set up IRQ stack frame and dispatch to _ISR_Dispatch */ - - mov.l #0xc0000000,er2 /* Disable IRQ */ - or.l #SYM(_ISR_Dispatch),er2 - mov.l er2,@-er7 - rte - -/* Inner IRQ Return, pop flags and return */ -exit: -/* Pop Stack */ - orc #0x80,ccr - mov @er7+,er6 - mov er6,er7 - mov @er7+,er6 - mov @er7+,er5 - mov @er7+,er4 - mov @er7+,er3 - mov @er7+,er2 - mov @er7+,er1 - mov @er7+,er0 -#endif - rte - -/* - 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): - -#if defined(__H8300H__) || defined(__H8300S__) || defined(__H8300SX__) - jsr @SYM(_Thread_Dispatch) - mov @er7+,er6 - mov @er7+,er5 - mov @er7+,er4 - mov @er7+,er3 - mov @er7+,er2 - mov @er7+,er1 - mov @er7+,er0 -#endif - rte - - - .align 2 - .global SYM(_CPU_Context_save_fp) - -SYM(_CPU_Context_save_fp): - rts - - - .align 2 - .global SYM(_CPU_Context_restore_fp) - -SYM(_CPU_Context_restore_fp): - rts |