NetBSD/sys/arch/x68k/sdboot/sdboot.s

| file: boot.s
| author: chapuni(GBA02750@niftyserve.or.jp)
|.offset	$100000
|_header::	ds.l	8
|_image::

	.global	_header
	.global _image

_header=0x100000		| <EFBFBD>ޤ<EFBFBD><EFBFBD>ϡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Υ<EFBFBD><EFBFBD>ɥ쥹<EFBFBD><EFBFBD>
_image=_header+(8*4)		| <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɤ<EFBFBD><EFBFBD>ޤ<EFBFBD><EFBFBD><EFBFBD>

	.global	_bootufs
	.text
top:
		jra	entry:S
		.ascii	"SHARP/"
		.ascii	"X68030"
		.word	0x8199,0x94e6,0x82ea,0x82bd
		.word	0x8e9e,0x82c9,0x82cd,0x8cbb
		.word	0x8ec0,0x93a6,0x94f0,0x8149
| 2400(<EFBFBD>⤷<EFBFBD><EFBFBD><EFBFBD><EFBFBD>$3F0000)
| d4 <EFBFBD>ˤϤ<EFBFBD><EFBFBD>Ǥ<EFBFBD> SCSI ID <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>äƤ<EFBFBD><EFBFBD><EFBFBD>
| <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> jmp <EFBFBD>ޤǤϥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֥<EFBFBD><EFBFBD>˽񤫤ͤФʤ<EFBFBD><EFBFBD>ʤ<EFBFBD><EFBFBD><EFBFBD>
entry:
	lea	_edata:l,a0		| clear out BSS
	movl	#_end-4,d0		| (must be <= 256 kB)
	subl	#_edata,d0
	lsrl	#2,d0
1:	clrl	a0@+
	dbra	d0,1b

		lea	top:l,a1	| 0x3F0000 <EFBFBD>˥<EFBFBD><EFBFBD><EFBFBD><EFBFBD>å<EFBFBD><EFBFBD>ݥ<EFBFBD><EFBFBD>󥿤<EFBFBD>
		lea	a1@,sp		| <20><><EFBFBD>ꤹ<EFBFBD>롣<EFBFBD><EBA1A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD> :l <20><><EFBFBD>դ<EFBFBD><D5A4>Ƥʤ<C6A4><CAA4>ȥ<EFBFBD><C8A5><EFBFBD>
		moveq	#1,d5		| 512bytes/sec
		moveq	#8192/512,d3	| <EFBFBD>ɤ߹<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>祵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		moveq	#0x40,d2	| <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǥ<EFBFBD>(sd*a <EFBFBD>Τ<EFBFBD>)
		moveq	#0x21,d1	| read
		moveq	#0xFFFFFFF5,d0	| SCSI
		trap	#15
		movel	d4,_ID:l

| <EFBFBD>ƥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȥѥ<EFBFBD><EFBFBD>åȤν<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		moveq	#7,d3
		moveq	#0,d1
initpalet:
		moveq	#0,d2
		moveq	#0x14,d0		|TPALET2
		trap	#15
		addqw	#1,d1
		movel	#0xFFFF,d2
		moveq	#0x14,d0		|TPALET2
		trap	#15
		addqw	#1,d1
		dbra	d3,initpalet

		jmp	_bootufs:l		| 0x3Fxxxx <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǥ椯

| int RAW_READ(void *buf, int pos, size_t length);
|	.offset	16
|raw_read_buf:	ds.l	1
|raw_read_pos:	ds.l	1
|raw_read_len:	ds.l	1
|	.text
raw_read_buf= 4+(4*11)
raw_read_pos= raw_read_buf+4
raw_read_len= raw_read_buf+8

	.global _RAW_READ
_RAW_READ:
		moveml	a2-a6/d2-d7,sp@-
		movel	_ID:l,d4
		moveq	#1,d5		| 512bytes/sec
		movel	sp@(raw_read_buf),a1
		movel	sp@(raw_read_pos),d2
		movel	sp@(raw_read_len),d3
		addl	#511,d3
		moveq	#9,d1
		lsrl	d1,d2
		lsrl	d1,d3
		addl	#0x40,d2
		moveq	#0x21,d1
		moveq	#0xF5-0x100,d0
		trap	#15
		moveml	sp@+,a2-a6/d2-d7
		rts

	.global	_JISSFT
_JISSFT:
		movel	sp@(4),d1
		moveq	#0xFFFFFFA1,d0
		trap	#15
		rts

	.global	_B_SFTSNS
_B_SFTSNS:
		moveq	#0x02,d0
		trap	#15
		rts

	.global	_B_KEYINP
_B_KEYINP:
		moveq	#0x00,d0
		trap	#15
		rts

	.global _B_PUTC
_B_PUTC:
		movel	sp@(4),d1
		moveq	#0x20,d0
		trap	#15
		rts

	.global _B_PRINT
_B_PRINT:
		movel	sp@(4),a1
		moveq	#0x21,d0
		trap	#15
		rts

	.global _B_COLOR
_B_COLOR:
		movel	sp@(4),d1
		moveq	#0x22,d0
		trap	#15
		rts

	.global _B_LOCATE
_B_LOCATE:
		movel	d2,sp@-
		movel	sp@(8),d1
		movel	sp@(12),d2
		moveq	#0x23,d0
		trap	#15
		movel	sp@+,d2
		rts

	.global _B_CLR_ST
_B_CLR_ST:
		movel	sp@(4),d1
		moveq	#0x2A,d0
		trap	#15
		rts

|IOCS SYS_STAT   $AC
|
|<EFBFBD><EFBFBD><EFBFBD><EFBFBD> d1.l=0 <EFBFBD>ΤȤ<EFBFBD> d0.l <EFBFBD>˰ʲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|        bit0<EFBFBD><EFBFBD>7         0:68000, 1:68010, 2:68020, 3:68030
|        bit14           0:MMU<EFBFBD>ʤ<EFBFBD>, 1:MMU<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|        bit15           0:FPCP<EFBFBD>ʤ<EFBFBD>, 1:FPCP<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|        bit16<EFBFBD><EFBFBD>31       <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>å<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԡ<EFBFBD><EFBFBD><EFBFBD>
|
| X68000 <EFBFBD><EFBFBD> IOCS <EFBFBD>ˤ<EFBFBD> $AC <EFBFBD>Ϥʤ<EFBFBD><EFBFBD>Τǥ<EFBFBD><EFBFBD>顼<EFBFBD>ˤʤ<EFBFBD><EFBFBD>ޤ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Xellent30 <EFBFBD>ξ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|<EFBFBD><EFBFBD>ư<EFBFBD><EFBFBD><EFBFBD><EFBFBD> SRAM <EFBFBD><EFBFBD><EFBFBD>Ȥ߹<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ޤ<EFBFBD><EFBFBD><EFBFBD>
	.global	_SYS_STAT
_SYS_STAT:
		movel	sp@(4),d1
		moveq	#0xAC-0x100,d0
		trap	#15
		rts

		.global	_getcpu
_getcpu:
	movl	#0x200,d0		| data freeze bit
	movc	d0,cacr			|   only exists on 68030
	movc	cacr,d0			| read it back
	tstl	d0			| zero?
	jeq	Lnot68030		| yes, we have 68020/68040
	movq	#3,d0			| 68030
	rts
Lnot68030:
	bset	#31,d0			| data cache enable bit
	movc	d0,cacr			|   only exists on 68040
	movc	cacr,d0			| read it back
	tstl	d0			| zero?
	beq	Lis68020		| yes, we have 68020
	moveq	#0,d0			| now turn it back off
	movec	d0,cacr			|   before we access any data
	movq	#4,d0			| 68040
	rts
Lis68020:
	movq	#2,d0			| 68020
	rts

	.comm	_ID,4

	.end