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| 1 | # |
1 | # |
| 2 | # Copyright (C) 2005 Jakub Jermar |
2 | # Copyright (C) 2005 Jakub Jermar |
| 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 | #include <arch/register.h> |
29 | #include <arch/register.h> |
| 30 | 30 | ||
| 31 | .section K_TEXT_START |
31 | .section K_TEXT_START |
| 32 | 32 | ||
| 33 | .global kernel_image_start |
33 | .global kernel_image_start |
| 34 | 34 | ||
| 35 | stack0: |
35 | stack0: |
| 36 | kernel_image_start: |
36 | kernel_image_start: |
| 37 | .auto |
37 | .auto |
| 38 | 38 | ||
| 39 | # initialize PSR |
39 | # initialize PSR |
| 40 | mov psr.l = r0 |
40 | mov psr.l = r0 |
| 41 | srlz.i |
41 | srlz.i |
| 42 | srlz.d |
42 | srlz.d |
| 43 | ssm PSR_IC_MASK |
43 | ssm PSR_IC_MASK |
| 44 | srlz.d |
44 | srlz.d |
| 45 | 45 | ||
| 46 | # switch to register bank 1 |
46 | # switch to register bank 1 |
| 47 | bsw.1 |
47 | bsw.1 |
| 48 | 48 | ||
| 49 | # initialize register stack |
49 | # initialize register stack |
| 50 | mov ar.rsc = r0 |
50 | mov ar.rsc = r0 |
| 51 | mov ar.bspstore = r0 |
51 | mov ar.bspstore = r0 |
| 52 | loadrs |
52 | loadrs |
| 53 | 53 | ||
| 54 | .explicit |
54 | .explicit |
| 55 | # initialize memory stack to some sane value |
55 | # initialize memory stack to some sane value |
| 56 | movl r12 = stack0 ;; |
56 | movl r12 = stack0 ;; |
| 57 | add r12 = - 16, r12 /* allocate a scratch area on the stack */ |
57 | add r12 = - 16, r12 /* allocate a scratch area on the stack */ |
| 58 | 58 | ||
| 59 | # initialize gp (Global Pointer) register |
59 | # initialize gp (Global Pointer) register |
| 60 | movl r1 = _hardcoded_load_address |
60 | movl r1 = _hardcoded_load_address |
| 61 | 61 | ||
| 62 | ;; |
62 | ;; |
| 63 | 63 | ||
| 64 | # |
64 | # |
| 65 | # Initialize hardcoded_* variables. |
65 | # Initialize hardcoded_* variables. |
| 66 | # |
66 | # |
| 67 | movl r14 = _hardcoded_ktext_size |
67 | movl r14 = _hardcoded_ktext_size |
| 68 | movl r15 = _hardcoded_kdata_size |
68 | movl r15 = _hardcoded_kdata_size |
| 69 | movl r16 = _hardcoded_load_address |
69 | movl r16 = _hardcoded_load_address |
| 70 | addl r17 = @gprel(hardcoded_ktext_size), gp |
70 | addl r17 = @gprel(hardcoded_ktext_size), gp |
| 71 | addl r18 = @gprel(hardcoded_kdata_size), gp |
71 | addl r18 = @gprel(hardcoded_kdata_size), gp |
| 72 | addl r19 = @gprel(hardcoded_load_address), gp |
72 | addl r19 = @gprel(hardcoded_load_address), gp |
| 73 | ;; |
73 | ;; |
| 74 | st4 [r17] = r14 |
74 | st8 [r17] = r14 |
| 75 | st4 [r18] = r15 |
75 | st8 [r18] = r15 |
| 76 | st8 [r19] = r16 |
76 | st8 [r19] = r16 |
| 77 | 77 | ||
| 78 | br.call.sptk.many b0=main_bsp |
78 | br.call.sptk.many b0=main_bsp |
| 79 | 79 | ||
| 80 | 0: |
80 | 0: |
| 81 | br 0b |
81 | br 0b |
| 82 | 82 | ||