[linexec-j720] / asm / asm.asm

	TTL	C:\pocket\test\asm.cpp

	AREA	|.drectve|, DRECTVE
	DCB	"-defaultlib:coredll.lib "
	DCB	"-defaultlib:corelibc.lib "

	EXPORT	|?do_it@@YAXXZ|				; do_it
	AREA	|.pdata|, PDATA
|$T222|	DCD	|?do_it@@YAXXZ|
	DCD	0x40000100
	AREA	|.text|, CODE
|?do_it@@YAXXZ| PROC					; do_it
|$M220|


		mcr     p15, 0, r0, c7, c5, 0 	;/* invalidate i cache & BTB */
		mrc	p15, 0, r0, c2, c0, 0
		mov	r0, r0
		sub 	pc, pc, #4		


; turn off LCD controller...
; I couldn't figure out how to use armasm.exe conditional with variables
; #if xscale
;		ldr	r9, =0x44000000
;		ldr	r8, [r9]
;		orr	r8, r8, #0x400
;		str	r8, [r9]

; #elif strongarm
		ldr	r9, =0xb0100000
		ldr	r8, [r9]
		bic	r8, r8, #1
		str	r8, [r9]

		mov	r8, #0
		ldr	r9, =0x48000000
		str	r8, [r9, #0x1FC]


; turn off unused serial ports

		mov r8, #0
		ldr r9, =0x80010000
		str r8, [r9, #0xC]
		ldr r9, =0x80050000
		str r8, [r9, #0xC]

; #endif

		add	r9, r1, #0x100

; #if xscale
;		ldr	r5, =0xa0000100
;		ldr	r7, =0xa0400000

; #elif strongarm
		ldr	r5, =0xc0000100
		ldr	r7, =0xc0400000
; #endif


label		ldr     r8, [r9]
        	str     r8, [r5]
		add     r9, r9, #4 
		add     r5, r5, #4 
		cmp     r5, r7
        	blt     label

; #if xscale
;		MOV	r4, #0xA0000000

; #elif strongarm
		MOV	r4, #0xc0000000
; #endif

		add	r11,r4,#0x8000

		mov 	r10,r2		;machine number passed from DRAMloader

		mcr	p15, 0, r0, c8, c7, 0x00 ;/* invalidate I+D TLB */
		mrc	p15, 0, r0, c2, c0, 0
		mov	r0, r0
		sub 	pc, pc, #4		

; they skipped this, unnecessary? seems like we need to do this

		mcr     p15, 0, r0, c7, c5, 0 	;/* invalidate i cache & BTB */
	
		mov	r0, #0
		mcr	p15, 0, r0, c13, c0, 0
		mrc	p15, 0, r0, c2, c0, 0
		mov	r0, r0
		sub 	pc, pc, #4		

; This is needed to get Linux 2.6 booting
		mov	r0, #0
		mcr	p15, 0, r0, c7, c10, 4	; Drain write buffer
		mcr	p15, 0, r0, c7, c7, 0	; invalidate I+D & BTB
		
		mrc	p15, 0, r0, c1, c0, 0
		bic	r0, r0, #5		; MMU & Dcache off
		bic	r0, r0, #0x1000		; Icache off
		mcr	p15, 0, r0, c1, c0, 0	; disable the MMU & caches
		mrc	p15, 0, r0, c2, c0, 0
		mov	r0, r0
		sub	pc, pc, #4
		
		
		mov	r0, #0
		mcr	p15, 0, r0, c13, c0, 0	; clear PID
		mcr	p15, 0, r0, c8, c7, 0	; invalidate I+D TLB
		mrc	p15, 0, r0, c2, c0, 0
		mov	r0, r0
		sub	pc, pc, #4

;Set parameters for kernel
		mov     r0, #0
	        mov     r1, r10
		ldr     r2, [r2, #0]
		mov     r2, #0

; Jump into the kernel:
		mov		pc, r11	


|$M221|
	ENDP  ; |?do_it@@YAXXZ|, do_it
	END
Commit	Line	Data
c5f1f439	1	TTL C:\pocket\test\asm.cpp
	2
	3	AREA \|.drectve\|, DRECTVE
	4	DCB "-defaultlib:coredll.lib "
	5	DCB "-defaultlib:corelibc.lib "
	6
	7	EXPORT \|?do_it@@YAXXZ\| ; do_it
	8	AREA \|.pdata\|, PDATA
	9	\|$T222\| DCD \|?do_it@@YAXXZ\|
	10	DCD 0x40000100
	11	AREA \|.text\|, CODE
	12	\|?do_it@@YAXXZ\| PROC ; do_it
	13	\|$M220\|
	14
	15
	16	mcr p15, 0, r0, c7, c5, 0 ;/* invalidate i cache & BTB */
	17	mrc p15, 0, r0, c2, c0, 0
	18	mov r0, r0
	19	sub pc, pc, #4
	20
	21
	22	; turn off LCD controller...
	23	; I couldn't figure out how to use armasm.exe conditional with variables
	24	; #if xscale
	25	; ldr r9, =0x44000000
	26	; ldr r8, [r9]
	27	; orr r8, r8, #0x400
	28	; str r8, [r9]
	29
	30	; #elif strongarm
	31	ldr r9, =0xb0100000
	32	ldr r8, [r9]
	33	bic r8, r8, #1
	34	str r8, [r9]
	35
1cc7039e	36	mov r8, #0
	37	ldr r9, =0x48000000
	38	str r8, [r9, #0x1FC]
	39
	40
c5f1f439	41	; turn off unused serial ports
	42
	43	mov r8, #0
	44	ldr r9, =0x80010000
	45	str r8, [r9, #0xC]
	46	ldr r9, =0x80050000
	47	str r8, [r9, #0xC]
	48
	49	; #endif
	50
	51	add r9, r1, #0x100
	52
	53	; #if xscale
	54	; ldr r5, =0xa0000100
	55	; ldr r7, =0xa0400000
	56
	57	; #elif strongarm
	58	ldr r5, =0xc0000100
	59	ldr r7, =0xc0400000
	60	; #endif
	61
	62
	63	label ldr r8, [r9]
	64	str r8, [r5]
	65	add r9, r9, #4
	66	add r5, r5, #4
	67	cmp r5, r7
	68	blt label
	69
	70	; #if xscale
	71	; MOV r4, #0xA0000000
	72
	73	; #elif strongarm
	74	MOV r4, #0xc0000000
	75	; #endif
	76
	77	add r11,r4,#0x8000
	78
	79	mov r10,r2 ;machine number passed from DRAMloader
	80
	81	mcr p15, 0, r0, c8, c7, 0x00 ;/* invalidate I+D TLB */
	82	mrc p15, 0, r0, c2, c0, 0
	83	mov r0, r0
	84	sub pc, pc, #4
	85
	86	; they skipped this, unnecessary? seems like we need to do this
	87
	88	mcr p15, 0, r0, c7, c5, 0 ;/* invalidate i cache & BTB */
	89
	90	mov r0, #0
	91	mcr p15, 0, r0, c13, c0, 0
	92	mrc p15, 0, r0, c2, c0, 0
	93	mov r0, r0
	94	sub pc, pc, #4
	95
939a9730	96	; This is needed to get Linux 2.6 booting
	97	mov r0, #0
	98	mcr p15, 0, r0, c7, c10, 4 ; Drain write buffer
	99	mcr p15, 0, r0, c7, c7, 0 ; invalidate I+D & BTB
	100
	101	mrc p15, 0, r0, c1, c0, 0
	102	bic r0, r0, #5 ; MMU & Dcache off
	103	bic r0, r0, #0x1000 ; Icache off
	104	mcr p15, 0, r0, c1, c0, 0 ; disable the MMU & caches
	105	mrc p15, 0, r0, c2, c0, 0
	106	mov r0, r0
	107	sub pc, pc, #4
	108
	109
	110	mov r0, #0
	111	mcr p15, 0, r0, c13, c0, 0 ; clear PID
	112	mcr p15, 0, r0, c8, c7, 0 ; invalidate I+D TLB
	113	mrc p15, 0, r0, c2, c0, 0
	114	mov r0, r0
	115	sub pc, pc, #4
	116
	117	;Set parameters for kernel
c5f1f439	118	mov r0, #0
	119	mov r1, r10
	120	ldr r2, [r2, #0]
	121	mov r2, #0
	122
	123	; Jump into the kernel:
	124	mov pc, r11
	125
	126
	127	\|$M221\|
	128	ENDP ; \|?do_it@@YAXXZ\|, do_it
	129	END
	130