[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]

; 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
	36	; turn off unused serial ports
	37
	38	mov r8, #0
	39	ldr r9, =0x80010000
	40	str r8, [r9, #0xC]
	41	ldr r9, =0x80050000
	42	str r8, [r9, #0xC]
	43
	44	; #endif
	45
	46	add r9, r1, #0x100
	47
	48	; #if xscale
	49	; ldr r5, =0xa0000100
	50	; ldr r7, =0xa0400000
	51
	52	; #elif strongarm
	53	ldr r5, =0xc0000100
	54	ldr r7, =0xc0400000
	55	; #endif
	56
	57
	58	label ldr r8, [r9]
	59	str r8, [r5]
	60	add r9, r9, #4
	61	add r5, r5, #4
	62	cmp r5, r7
	63	blt label
	64
65	; #if xscale
66	; MOV r4, #0xA0000000
67
68	; #elif strongarm
69	MOV r4, #0xc0000000
70	; #endif
71
72	add r11,r4,#0x8000
73
74	mov r10,r2 ;machine number passed from DRAMloader
75
76	mcr p15, 0, r0, c8, c7, 0x00 ;/* invalidate I+D TLB */
77	mrc p15, 0, r0, c2, c0, 0
78	mov r0, r0
79	sub pc, pc, #4
80
81	; they skipped this, unnecessary? seems like we need to do this
82
83	mcr p15, 0, r0, c7, c5, 0 ;/* invalidate i cache & BTB */
84
85	mov r0, #0
86	mcr p15, 0, r0, c13, c0, 0
87	mrc p15, 0, r0, c2, c0, 0
88	mov r0, r0
89	sub pc, pc, #4
90
939a9730	91	; This is needed to get Linux 2.6 booting
	92	mov r0, #0
	93	mcr p15, 0, r0, c7, c10, 4 ; Drain write buffer
	94	mcr p15, 0, r0, c7, c7, 0 ; invalidate I+D & BTB
	95
	96	mrc p15, 0, r0, c1, c0, 0
	97	bic r0, r0, #5 ; MMU & Dcache off
	98	bic r0, r0, #0x1000 ; Icache off
	99	mcr p15, 0, r0, c1, c0, 0 ; disable the MMU & caches
	100	mrc p15, 0, r0, c2, c0, 0
	101	mov r0, r0
	102	sub pc, pc, #4
	103
	104
	105	mov r0, #0
	106	mcr p15, 0, r0, c13, c0, 0 ; clear PID
	107	mcr p15, 0, r0, c8, c7, 0 ; invalidate I+D TLB
	108	mrc p15, 0, r0, c2, c0, 0
	109	mov r0, r0
	110	sub pc, pc, #4
	111
	112	;Set parameters for kernel
c5f1f439	113	mov r0, #0
	114	mov r1, r10
	115	ldr r2, [r2, #0]
	116	mov r2, #0
	117
	118	; Jump into the kernel:
	119	mov pc, r11
	120
	121
	122	\|$M221\|
	123	ENDP ; \|?do_it@@YAXXZ\|, do_it
	124	END
	125