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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) |
29 | #include <stack.h> |
30 | - | ||
31 | #define PSTATE_AM_BIT 8 |
30 | #include <register.h> |
32 | 31 | ||
33 | .text |
32 | .text |
34 | 33 | ||
35 | .global halt |
34 | .global halt |
36 | .global memcpy |
35 | .global memcpy |
37 | .global jump_to_kernel |
36 | .global jump_to_kernel |
38 | 37 | ||
39 | halt: |
38 | halt: |
40 | b halt |
39 | b halt |
41 | nop |
40 | nop |
42 | 41 | ||
43 | memcpy: |
42 | memcpy: |
44 | .register %g2, #scratch |
43 | .register %g2, #scratch |
45 | .register %g3, #scratch |
44 | .register %g3, #scratch |
46 | add %o1, 7, %g1 |
45 | add %o1, 7, %g1 |
47 | and %g1, -8, %g1 |
46 | and %g1, -8, %g1 |
48 | cmp %o1, %g1 |
47 | cmp %o1, %g1 |
49 | be,pn %xcc, 3f |
48 | be,pn %xcc, 3f |
50 | add %o0, 7, %g1 |
49 | add %o0, 7, %g1 |
51 | mov 0, %g3 |
50 | mov 0, %g3 |
52 | 0: |
51 | 0: |
53 | brz,pn %o2, 2f |
52 | brz,pn %o2, 2f |
54 | mov 0, %g2 |
53 | mov 0, %g2 |
55 | 1: |
54 | 1: |
56 | ldub [%g3 + %o1], %g1 |
55 | ldub [%g3 + %o1], %g1 |
57 | add %g2, 1, %g2 |
56 | add %g2, 1, %g2 |
58 | cmp %o2, %g2 |
57 | cmp %o2, %g2 |
59 | stb %g1, [%g3 + %o0] |
58 | stb %g1, [%g3 + %o0] |
60 | bne,pt %xcc, 1b |
59 | bne,pt %xcc, 1b |
61 | mov %g2, %g3 |
60 | mov %g2, %g3 |
62 | 2: |
61 | 2: |
63 | jmp %o7 + 8 ! exit point |
62 | jmp %o7 + 8 ! exit point |
64 | mov %o1, %o0 |
63 | mov %o1, %o0 |
65 | 3: |
64 | 3: |
66 | and %g1, -8, %g1 |
65 | and %g1, -8, %g1 |
67 | cmp %o0, %g1 |
66 | cmp %o0, %g1 |
68 | bne,pt %xcc, 0b |
67 | bne,pt %xcc, 0b |
69 | mov 0, %g3 |
68 | mov 0, %g3 |
70 | srlx %o2, 3, %g4 |
69 | srlx %o2, 3, %g4 |
71 | brz,pn %g4, 5f |
70 | brz,pn %g4, 5f |
72 | mov 0, %g5 |
71 | mov 0, %g5 |
73 | 4: |
72 | 4: |
74 | sllx %g3, 3, %g2 |
73 | sllx %g3, 3, %g2 |
75 | add %g5, 1, %g3 |
74 | add %g5, 1, %g3 |
76 | ldx [%o1 + %g2], %g1 |
75 | ldx [%o1 + %g2], %g1 |
77 | mov %g3, %g5 |
76 | mov %g3, %g5 |
78 | cmp %g4, %g3 |
77 | cmp %g4, %g3 |
79 | bne,pt %xcc, 4b |
78 | bne,pt %xcc, 4b |
80 | stx %g1, [%o0 + %g2] |
79 | stx %g1, [%o0 + %g2] |
81 | 5: |
80 | 5: |
82 | and %o2, 7, %o2 |
81 | and %o2, 7, %o2 |
83 | brz,pn %o2, 2b |
82 | brz,pn %o2, 2b |
84 | sllx %g4, 3, %g1 |
83 | sllx %g4, 3, %g1 |
85 | mov 0, %g2 |
84 | mov 0, %g2 |
86 | add %g1, %o0, %o0 |
85 | add %g1, %o0, %o0 |
87 | add %g1, %o1, %g4 |
86 | add %g1, %o1, %g4 |
88 | mov 0, %g3 |
87 | mov 0, %g3 |
89 | 6: |
88 | 6: |
90 | ldub [%g2 + %g4], %g1 |
89 | ldub [%g2 + %g4], %g1 |
91 | stb %g1, [%g2 + %o0] |
90 | stb %g1, [%g2 + %o0] |
92 | add %g3, 1, %g2 |
91 | add %g3, 1, %g2 |
93 | cmp %o2, %g2 |
92 | cmp %o2, %g2 |
94 | bne,pt %xcc, 6b |
93 | bne,pt %xcc, 6b |
95 | mov %g2, %g3 |
94 | mov %g2, %g3 |
96 | 95 | ||
97 | jmp %o7 + 8 ! exit point |
96 | jmp %o7 + 8 ! exit point |
98 | mov %o1, %o0 |
97 | mov %o1, %o0 |
99 | 98 | ||
100 | jump_to_kernel: |
99 | jump_to_kernel: |
101 | mov %o0, %l1 |
100 | mov %o0, %l1 |
102 | mov %o1, %o0 |
101 | mov %o1, %o0 |
103 | mov %o2, %o1 |
102 | mov %o2, %o1 |
104 | jmp %l1 ! jump to kernel |
103 | jmp %l1 ! jump to kernel |
105 | nop |
104 | nop |
106 | 105 | ||
107 | .global ofw |
106 | .global ofw |
108 | ofw: |
107 | ofw: |
109 | save %sp, -STACK_WINDOW_SAVE_AREA_SIZE, %sp |
108 | save %sp, -STACK_WINDOW_SAVE_AREA_SIZE, %sp |
110 | set ofw_cif, %l0 |
109 | set ofw_cif, %l0 |
111 | ldx [%l0], %l0 |
110 | ldx [%l0], %l0 |
112 | 111 | ||
113 | rdpr %pstate, %l1 |
112 | rdpr %pstate, %l1 |
114 | and %l1, ~PSTATE_AM_BIT, %l2 |
113 | and %l1, ~PSTATE_AM_BIT, %l2 |
115 | wrpr %l2, 0, %pstate |
114 | wrpr %l2, 0, %pstate |
116 | 115 | ||
117 | jmpl %l0, %o7 |
116 | jmpl %l0, %o7 |
118 | mov %i0, %o0 |
117 | mov %i0, %o0 |
119 | 118 | ||
120 | wrpr %l1, 0, %pstate |
119 | wrpr %l1, 0, %pstate |
121 | 120 | ||
122 | ret |
121 | ret |
123 | restore %o0, 0, %o0 |
122 | restore %o0, 0, %o0 |
124 | 123 |