gfd_usb_int.s

最近在國外網站抓到的作業系統 以Arm為基礎去開發的

 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;
 ;  (c) 2004 ASIC,all rights reserved
 ;         
 ;           
 ;	This source code and any compilation or derivative thereof 
 ;is proprietary information and is confidential in nature.
 ;	Under no circumstance is this software to be exposed or placed
 ;under an open source License of any type without expressed
 ;written permission of ASIC.  
 ;
 ;filename:	HA_INT_USB.s          
 ;history:
 ;
 ;    Version         Date            Author            Comments
 ;------------------------------------------------------------------------------------    
 ;     1.0          2004.9.24           lmq             Initial Creation
 ;     
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
  

	AREA ENT_INT_USB2APP1 , CODE, READONLY                                                     
	       ENTRY                           ; Mark first instruction to execute 
	       
	 include hardware_gfd.h

	       
	       
ENT_INT_USB2APP 
	EXPORT ENT_INT_USB2APP 
	 
	;*****************************************ENT_INT_UART1
	ldmfd	sp!, R_ALL_0_12

	msr		cpsr_c,	#0xd3  ;CHANGE MODLE TO THE SVC MODLE
	;NOW IN THE SVC MODLE 
	stmfd	sp!, {RTA}    ;save the temp value  
	
	IMPORT	LR_IRQ
	IMPORT	SPSR_IRQ
	ldr		RTA, =LR_IRQ
	ldr		RTA, [RTA]   ;;LOAD THE LR
	

	sub		RTA,RTA,#4
	stmfd	sp!, {RTA}	;SAVE THE LR_IRQ-4 TO THE SP_SYS
	
	ldr		RTA, =SPSR_IRQ
	ldr		RTA, [RTA]   ;;LOAD THE SPSR_IRQ

	stmfd	sp!, {RTA}	;SAVE THE SPSR_IRQ TO THE SP_SYS   ;stmfd sp!, {spsr, lr}
		;____________________________________________________one layer

	
	stmfd	sp!, R_ALL_0_12
	
	ldr		RTA, =INTC_PLV  ;//read the plv  and store in the stack
	ldr		RTA, [RTA]  
	
	stmfd	sp!, {RTA}        ;//SAVE THE PLV INTO THE SVC'S STACK

	;set the plv
	ldr		RTA, =INTC_PLV
	mov		RTB, #0X0B
	str		RTB,  [RTA]
	
;	IMPORT	ent_int
;	bl		ent_int
	
	;open the irq
	;mrs		RTA, cpsr
	;bic		RTA, RTA, #0x80  ;OPEN IRQ
	;bic		RTA, RTA, #0x80  ;OPEN IRQ
	;bic		RTA, RTA, #0x80  ;OPEN IRQ
	;msr		cpsr_c, RTA
	;jump to the int_handler
	
	
	IMPORT HA_GFDUSB_INTHANDLE
	
	bl HA_GFDUSB_INTHANDLE
	
	
	IF :DEF: HA_DEBUG
	
	ENDIF
	
	;CLOSE THE IRQ
	mrs		RTA, cpsr
	orr		RTA, RTA, #0X80   ;CLOSE IRQ
	msr		cpsr_c, RTA
	
	IMPORT	END_INT
	b		END_INT
		;=========================================END OF ENT_INT_EXTINT0
	end