driver.s

HAL硬件抽象层源码

;/*****************************************************************************
; * Copyright (C) ARM Limited 1998. All rights reserved. 
; * Copyright (C) Hynix Semiconductor Limited 2002. All rights reserved. 
; *****************************************************************************/
;/*****************************************************************************
;
;	Hynix HMS39C7092 specific assembly source code.  
;  
;******************************************************************************/

	INCLUDE	bits.s
	INCLUDE	sizes.s
	INCLUDE	platform.s
;remarked because 7092 does not have MMU.	INCLUDE	mmu_h.s
	GET	target.s


	EXPORT	uHALir_InitTargetMem	; Initialise memory
	EXPORT	uHALir_FindRAMTop		; Find top of memory

	IMPORT	uHALir_EnterLockedSvcMode	; Enter Supervisor mode & disable IRQ.
	IMPORT	uHALir_ExitSvcMode	; Exit Supervisor mode.
	IMPORT	uHALiv_TopOfMemory	; Top of RAM.

	KEEP
	AREA    |C$$code$$__pid|, CODE, READONLY


; -------------------------------------------------------------------
; Routine to initialise the target-specific RAM:
;
; See INIT_RAM macro for description

; NOTE:	lr contains return address
;	a1 returns top of memory

uHALir_InitTargetMem
	;; Initialise the DRAM (if present)
	;INIT_RAM	a1,v1,v2,v3,v4
	;LDR	a1, =uHAL_MEMORY_SIZE 
	;GET_RAMSIZE	a1,v1,v2,v3,v4	
	ldr	r0,=uHAL_MEMORY_SIZE
	MOV	pc, lr			; All done, return


uHALir_FindRAMTop
	;STMFD	r13!,{v1,v2,v3,v4}
	;GET_RAMSIZE	a1,v1,v2,v3,v4
	;LDMFD	r13!,{v1,v2,v3,v4}
	ldr	r0,=uHAL_MEMORY_SIZE
	MOV	pc, lr			; All done, return


	END