Rev 2787 | Rev 3425 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
1018 | decky | 1 | # |
2071 | jermar | 2 | # Copyright (c) 2006 Martin Decky |
3 | # Copyright (c) 2006 Jakub Jermar |
||
1018 | decky | 4 | # All rights reserved. |
5 | # |
||
6 | # Redistribution and use in source and binary forms, with or without |
||
7 | # modification, are permitted provided that the following conditions |
||
8 | # are met: |
||
9 | # |
||
10 | # - Redistributions of source code must retain the above copyright |
||
11 | # notice, this list of conditions and the following disclaimer. |
||
12 | # - Redistributions in binary form must reproduce the above copyright |
||
13 | # notice, this list of conditions and the following disclaimer in the |
||
14 | # documentation and/or other materials provided with the distribution. |
||
15 | # - The name of the author may not be used to endorse or promote products |
||
16 | # derived from this software without specific prior written permission. |
||
17 | # |
||
18 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
19 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
20 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
21 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
22 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
23 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
24 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
25 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
26 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
27 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
28 | # |
||
29 | |||
1791 | jermar | 30 | #include <stack.h> |
31 | #include <register.h> |
||
1783 | jermar | 32 | |
1018 | decky | 33 | .text |
34 | |||
35 | .global halt |
||
1685 | decky | 36 | .global memcpy |
1018 | decky | 37 | .global jump_to_kernel |
38 | |||
39 | halt: |
||
40 | b halt |
||
41 | nop |
||
1685 | decky | 42 | |
43 | memcpy: |
||
1773 | jermar | 44 | .register %g2, #scratch |
45 | .register %g3, #scratch |
||
46 | add %o1, 7, %g1 |
||
47 | and %g1, -8, %g1 |
||
48 | cmp %o1, %g1 |
||
49 | be,pn %xcc, 3f |
||
50 | add %o0, 7, %g1 |
||
51 | mov 0, %g3 |
||
52 | 0: |
||
53 | brz,pn %o2, 2f |
||
54 | mov 0, %g2 |
||
55 | 1: |
||
56 | ldub [%g3 + %o1], %g1 |
||
57 | add %g2, 1, %g2 |
||
58 | cmp %o2, %g2 |
||
59 | stb %g1, [%g3 + %o0] |
||
60 | bne,pt %xcc, 1b |
||
61 | mov %g2, %g3 |
||
62 | 2: |
||
63 | jmp %o7 + 8 ! exit point |
||
64 | mov %o1, %o0 |
||
65 | 3: |
||
66 | and %g1, -8, %g1 |
||
67 | cmp %o0, %g1 |
||
68 | bne,pt %xcc, 0b |
||
69 | mov 0, %g3 |
||
70 | srlx %o2, 3, %g4 |
||
71 | brz,pn %g4, 5f |
||
72 | mov 0, %g5 |
||
73 | 4: |
||
74 | sllx %g3, 3, %g2 |
||
75 | add %g5, 1, %g3 |
||
76 | ldx [%o1 + %g2], %g1 |
||
77 | mov %g3, %g5 |
||
78 | cmp %g4, %g3 |
||
79 | bne,pt %xcc, 4b |
||
80 | stx %g1, [%o0 + %g2] |
||
81 | 5: |
||
82 | and %o2, 7, %o2 |
||
83 | brz,pn %o2, 2b |
||
84 | sllx %g4, 3, %g1 |
||
85 | mov 0, %g2 |
||
86 | add %g1, %o0, %o0 |
||
87 | add %g1, %o1, %g4 |
||
88 | mov 0, %g3 |
||
89 | 6: |
||
90 | ldub [%g2 + %g4], %g1 |
||
91 | stb %g1, [%g2 + %o0] |
||
92 | add %g3, 1, %g2 |
||
93 | cmp %o2, %g2 |
||
94 | bne,pt %xcc, 6b |
||
95 | mov %g2, %g3 |
||
1685 | decky | 96 | |
1773 | jermar | 97 | jmp %o7 + 8 ! exit point |
98 | mov %o1, %o0 |
||
99 | |||
1018 | decky | 100 | jump_to_kernel: |
3424 | svoboda | 101 | /* |
102 | * We have copied code and now we need to guarantee cache coherence. |
||
103 | * 1. Make sure that the code we have moved has drained to main memory. |
||
104 | * 2. Invalidate I-cache. |
||
105 | * 3. Flush instruction pipeline. |
||
106 | */ |
||
107 | call icache_flush |
||
108 | membar #StoreStore |
||
109 | flush %i7 |
||
110 | |||
1790 | jermar | 111 | mov %o0, %l1 |
112 | mov %o1, %o0 |
||
113 | mov %o2, %o1 |
||
1899 | jermar | 114 | mov %o3, %o2 |
1790 | jermar | 115 | jmp %l1 ! jump to kernel |
116 | nop |
||
1783 | jermar | 117 | |
3424 | svoboda | 118 | #define ICACHE_SIZE 8192 |
119 | #define ICACHE_LINE_SIZE 32 |
||
120 | #define ICACHE_SET_BIT (1 << 13) |
||
121 | #define ASI_ICACHE_TAG 0x67 |
||
122 | |||
123 | # Flush I-cache |
||
124 | icache_flush: |
||
125 | set ((ICACHE_SIZE - ICACHE_LINE_SIZE) | ICACHE_SET_BIT), %g1 |
||
126 | stxa %g0, [%g1] ASI_ICACHE_TAG |
||
127 | 0: membar #Sync |
||
128 | subcc %g1, ICACHE_LINE_SIZE, %g1 |
||
129 | bnz,pt %xcc, 0b |
||
130 | stxa %g0, [%g1] ASI_ICACHE_TAG |
||
131 | membar #Sync |
||
132 | retl |
||
133 | ! SF Erratum #51 |
||
134 | nop |
||
135 | |||
1783 | jermar | 136 | .global ofw |
137 | ofw: |
||
138 | save %sp, -STACK_WINDOW_SAVE_AREA_SIZE, %sp |
||
139 | set ofw_cif, %l0 |
||
140 | ldx [%l0], %l0 |
||
141 | |||
142 | rdpr %pstate, %l1 |
||
143 | and %l1, ~PSTATE_AM_BIT, %l2 |
||
144 | wrpr %l2, 0, %pstate |
||
145 | |||
146 | jmpl %l0, %o7 |
||
147 | mov %i0, %o0 |
||
148 | |||
149 | wrpr %l1, 0, %pstate |
||
150 | |||
151 | ret |
||
152 | restore %o0, 0, %o0 |