pacint.s

Hyper Operating System。基于ITRON接口的实时操作系统。主页： https://sourceforge.jp/projects/hos

; --------------------------------------------------------------------------- 
;  Hyper Operating System V4  μITRON4.0慌屯 Real-Time OS                     
;    プロセッサ藐据步コンポ〖ネント (ARM脱)                                   
;    毋嘲ハンドラ                                                             
;                                                                             
;                                     Copyright (C) 1998-2002 by Project HOS  
;                                     http://sourceforge.jp/projects/hos/     
; --------------------------------------------------------------------------- 


				INCLUDE	pacarm.inc


				AREA	inthdr_code, CODE, READONLY

				EXPORT	_HOS_UndefinedHandler
				EXPORT  _HOS_SwiHandler
				EXPORT	_HOS_PrefetchHandler
				EXPORT	_HOS_AbortHandler


; ----------------------------------------------
;  Undefined ハンドラ
; ----------------------------------------------
_HOS_UndefinedHandler
				b		_HOS_UndefinedHandler



; ----------------------------------------------
;  SWI ハンドラ
; ----------------------------------------------
				IMPORT	hospac_arm_imsk
_HOS_SwiHandler
			; ---- SWI戎规粕み叫し
				ldr		r13, [lr, #-4]
				bic		r13, r13, #0xff000000

				teq 	r13, #0x10		; カ〖ネルコ〖ルは #10 とする
				bne 	swi_ret

			; ---- パラメ〖タ〖を冉年
				cmp		a1, #3
				and		a1, a1, #0x03
				addls	pc, pc, a1, lsl #2
				b		swi_ret
				b		swi_dis_int
				b		swi_ena_int

			; ---- IRQ/FIQからの牲耽 (a1 = 2)
				ldr		r13, =pac_arm_swi_ret
				ldmia	r13, {a1, r13, lr}
				msr		spsr_csxf, r13
				subs	pc, lr, #0

			; ---- 充り哈み敦贿(a1 = 0)
swi_dis_int
				mov		r13, #Mode_USR:OR:I_Bit:OR:F_Bit
				msr 	spsr_cf, r13
				subs	pc, lr, #0

			; ---- 充り哈み钓材(a1 = 1)
swi_ena_int
				ldr		r13, =hospac_arm_imsk
				ldr		r13, [r13]
				msr 	spsr_cf, r13

swi_ret
			; ---- 经丸ここに毋嘲借妄怠菇 
				subs	pc, lr, #0


; ----------------------------------------------
;  Prefetch ハンドラ
; ----------------------------------------------
_HOS_PrefetchHandler
				b		_HOS_PrefetchHandler



; ----------------------------------------------
;  Abort ハンドラ
; ----------------------------------------------
_HOS_AbortHandler
				b		_HOS_AbortHandler



; ----------------------------------------------
;  グロ〖バル恃眶
; ----------------------------------------------
				AREA	inthdr_bss, NOINIT

				EXPORT	pac_arm_swi_ret
pac_arm_swi_ret	%		12		; a1, cpsr, lr の猛畔し脱


				END


; --------------------------------------------------------------------------- 
;  Copyright (C) 1998-2002 by Project HOS                                     
; ---------------------------------------------------------------------------