WebSVN – HelenOS-historic – Diff – /boot/trunk/arch/sparc64/loader/asm.S


#
# Copyright (C) 2006 Martin Decky
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
# - The name of the author may not be used to endorse or promote products
#   derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
 
#define STACK_WINDOW_SAVE_AREA_SIZE     (16*8)
 
#define PSTATE_AM_BIT	8
 
.text
 
.global halt
.global memcpy
.global jump_to_kernel
 
halt:
	b halt
	nop
	
memcpy:
	.register       %g2, #scratch
        .register       %g3, #scratch
	add	%o1, 7, %g1
	and	%g1, -8, %g1
	cmp	%o1, %g1
	be,pn	%xcc, 3f
	add	%o0, 7, %g1
	mov	0, %g3
0:
	brz,pn	%o2, 2f
	mov	0, %g2
1:
	ldub	[%g3 + %o1], %g1
	add	%g2, 1, %g2
	cmp	%o2, %g2
	stb	%g1, [%g3 + %o0]
	bne,pt	%xcc, 1b
	mov	%g2, %g3
2:
	jmp	%o7 + 8			! exit point
	mov	%o1, %o0
3:
	and	%g1, -8, %g1
	cmp	%o0, %g1
	bne,pt	%xcc, 0b
	mov	0, %g3
	srlx	%o2, 3, %g4
	brz,pn	%g4, 5f
	mov	0, %g5
4:
	sllx	%g3, 3, %g2
	add	%g5, 1, %g3
	ldx	[%o1 + %g2], %g1
	mov	%g3, %g5
	cmp	%g4, %g3
	bne,pt	%xcc, 4b
	stx	%g1, [%o0 + %g2]
5:
	and	%o2, 7, %o2
	brz,pn	%o2, 2b
	sllx	%g4, 3, %g1
	mov	0, %g2
	add	%g1, %o0, %o0
	add	%g1, %o1, %g4
	mov	0, %g3
6:
	ldub	[%g2 + %g4], %g1
	stb	%g1, [%g2 + %o0]
	add	%g3, 1, %g2
	cmp	%o2, %g2
	bne,pt	%xcc, 6b
	mov	%g2, %g3
 
	jmp	%o7 + 8			! exit point
	mov	%o1, %o0
 
jump_to_kernel:
	set ofw_cif, %l0
	jmp %o0				! jump to kernel
	ldx [%l0], %o4			! pass OpenFirmware address in %o4
 
.global ofw
ofw:
	save %sp, -STACK_WINDOW_SAVE_AREA_SIZE, %sp
	set ofw_cif, %l0
	ldx [%l0], %l0
 
	rdpr  %pstate, %l1
	and  %l1, ~PSTATE_AM_BIT, %l2
	wrpr  %l2, 0, %pstate
    
	jmpl %l0, %o7
	mov %i0, %o0
 
	wrpr %l1, 0, %pstate
 
	ret
	restore %o0, 0, %o0
 

Rev 1778	Rev 1783
1	#	1	#
2	# Copyright (C) 2006 Martin Decky	2	# Copyright (C) 2006 Martin Decky
3	# All rights reserved.	3	# All rights reserved.
4	#	4	#
5	# Redistribution and use in source and binary forms, with or without	5	# Redistribution and use in source and binary forms, with or without
6	# modification, are permitted provided that the following conditions	6	# modification, are permitted provided that the following conditions
7	# are met:	7	# are met:
8	#	8	#
9	# - Redistributions of source code must retain the above copyright	9	# - Redistributions of source code must retain the above copyright
10	# notice, this list of conditions and the following disclaimer.	10	# notice, this list of conditions and the following disclaimer.
11	# - Redistributions in binary form must reproduce the above copyright	11	# - Redistributions in binary form must reproduce the above copyright
12	# notice, this list of conditions and the following disclaimer in the	12	# notice, this list of conditions and the following disclaimer in the
13	# documentation and/or other materials provided with the distribution.	13	# documentation and/or other materials provided with the distribution.
14	# - The name of the author may not be used to endorse or promote products	14	# - The name of the author may not be used to endorse or promote products
15	# derived from this software without specific prior written permission.	15	# derived from this software without specific prior written permission.
16	#	16	#
17	# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	#	27	#
28		28
-		29	#define STACK_WINDOW_SAVE_AREA_SIZE (16*8)
-		30
-		31	#define PSTATE_AM_BIT 8
-		32
29	.text	33	.text
30		34
31	.global halt	35	.global halt
32	.global memcpy	36	.global memcpy
33	.global jump_to_kernel	37	.global jump_to_kernel
34		38
35	halt:	39	halt:
36	b halt	40	b halt
37	nop	41	nop
38		42
39	memcpy:	43	memcpy:
40	.register %g2, #scratch	44	.register %g2, #scratch
41	.register %g3, #scratch	45	.register %g3, #scratch
42	add %o1, 7, %g1	46	add %o1, 7, %g1
43	and %g1, -8, %g1	47	and %g1, -8, %g1
44	cmp %o1, %g1	48	cmp %o1, %g1
45	be,pn %xcc, 3f	49	be,pn %xcc, 3f
46	add %o0, 7, %g1	50	add %o0, 7, %g1
47	mov 0, %g3	51	mov 0, %g3
48	0:	52	0:
49	brz,pn %o2, 2f	53	brz,pn %o2, 2f
50	mov 0, %g2	54	mov 0, %g2
51	1:	55	1:
52	ldub [%g3 + %o1], %g1	56	ldub [%g3 + %o1], %g1
53	add %g2, 1, %g2	57	add %g2, 1, %g2
54	cmp %o2, %g2	58	cmp %o2, %g2
55	stb %g1, [%g3 + %o0]	59	stb %g1, [%g3 + %o0]
56	bne,pt %xcc, 1b	60	bne,pt %xcc, 1b
57	mov %g2, %g3	61	mov %g2, %g3
58	2:	62	2:
59	jmp %o7 + 8 ! exit point	63	jmp %o7 + 8 ! exit point
60	mov %o1, %o0	64	mov %o1, %o0
61	3:	65	3:
62	and %g1, -8, %g1	66	and %g1, -8, %g1
63	cmp %o0, %g1	67	cmp %o0, %g1
64	bne,pt %xcc, 0b	68	bne,pt %xcc, 0b
65	mov 0, %g3	69	mov 0, %g3
66	srlx %o2, 3, %g4	70	srlx %o2, 3, %g4
67	brz,pn %g4, 5f	71	brz,pn %g4, 5f
68	mov 0, %g5	72	mov 0, %g5
69	4:	73	4:
70	sllx %g3, 3, %g2	74	sllx %g3, 3, %g2
71	add %g5, 1, %g3	75	add %g5, 1, %g3
72	ldx [%o1 + %g2], %g1	76	ldx [%o1 + %g2], %g1
73	mov %g3, %g5	77	mov %g3, %g5
74	cmp %g4, %g3	78	cmp %g4, %g3
75	bne,pt %xcc, 4b	79	bne,pt %xcc, 4b
76	stx %g1, [%o0 + %g2]	80	stx %g1, [%o0 + %g2]
77	5:	81	5:
78	and %o2, 7, %o2	82	and %o2, 7, %o2
79	brz,pn %o2, 2b	83	brz,pn %o2, 2b
80	sllx %g4, 3, %g1	84	sllx %g4, 3, %g1
81	mov 0, %g2	85	mov 0, %g2
82	add %g1, %o0, %o0	86	add %g1, %o0, %o0
83	add %g1, %o1, %g4	87	add %g1, %o1, %g4
84	mov 0, %g3	88	mov 0, %g3
85	6:	89	6:
86	ldub [%g2 + %g4], %g1	90	ldub [%g2 + %g4], %g1
87	stb %g1, [%g2 + %o0]	91	stb %g1, [%g2 + %o0]
88	add %g3, 1, %g2	92	add %g3, 1, %g2
89	cmp %o2, %g2	93	cmp %o2, %g2
90	bne,pt %xcc, 6b	94	bne,pt %xcc, 6b
91	mov %g2, %g3	95	mov %g2, %g3
92		96
93	jmp %o7 + 8 ! exit point	97	jmp %o7 + 8 ! exit point
94	mov %o1, %o0	98	mov %o1, %o0
95		99
96	jump_to_kernel:	100	jump_to_kernel:
97	set ofw, %l0	101	set ofw_cif, %l0
98	jmp %o0 ! jump to kernel	102	jmp %o0 ! jump to kernel
99	ldx [%l0], %o4 ! pass OpenFirmware address in %o4	103	ldx [%l0], %o4 ! pass OpenFirmware address in %o4
-		104
-		105	.global ofw
-		106	ofw:
-		107	save %sp, -STACK_WINDOW_SAVE_AREA_SIZE, %sp
-		108	set ofw_cif, %l0
-		109	ldx [%l0], %l0
-		110
-		111	rdpr %pstate, %l1
-		112	and %l1, ~PSTATE_AM_BIT, %l2
-		113	wrpr %l2, 0, %pstate
-		114
-		115	jmpl %l0, %o7
-		116	mov %i0, %o0
-		117
-		118	wrpr %l1, 0, %pstate
-		119
-		120	ret
-		121	restore %o0, 0, %o0
100		122

Subversion Repositories HelenOS-historic

(root)/boot/trunk/arch/sparc64/loader/asm.S – Rev 1778 → 1783