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1 | # |
1 | # |
2 | # Copyright (c) 2007 Michal Kebrt |
2 | # Copyright (c) 2007 Michal Kebrt |
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/asm/boot.h> |
29 | #include <arch/asm/boot.h> |
30 | 30 | ||
31 | .text |
31 | .text |
32 | 32 | ||
33 | .global kernel_image_start |
33 | .global kernel_image_start |
34 | .global exc_stack |
34 | .global exc_stack |
35 | .global supervisor_sp |
35 | .global supervisor_sp |
36 | 36 | ||
37 | 37 | ||
38 | kernel_image_start: |
38 | kernel_image_start: |
39 | 39 | ||
40 | # switch to system mode |
40 | # switch to supervisor mode |
41 | mrs r3, cpsr |
41 | mrs r3, cpsr |
- | 42 | bic r3, r3, #0x1f |
|
42 | orr r3, r3, #0x1f |
43 | orr r3, r3, #0x13 |
43 | msr cpsr_c, r3 |
44 | msr cpsr_c, r3 |
44 | 45 | ||
45 | ldr sp, =temp_stack |
46 | ldr sp, =temp_stack |
46 | 47 | ||
47 | cmp r2, #0 |
48 | cmp r2, #0 |
48 | beq bootinfo_end |
49 | beq bootinfo_end |
49 | 50 | ||
50 | ldr r3, =bootinfo |
51 | ldr r3, =bootinfo |
51 | 52 | ||
52 | bootinfo_loop: |
53 | bootinfo_loop: |
53 | ldr r4, [r1] |
54 | ldr r4, [r1] |
54 | str r4, [r3] |
55 | str r4, [r3] |
55 | 56 | ||
56 | add r1, r1, #4 |
57 | add r1, r1, #4 |
57 | add r3, r3, #4 |
58 | add r3, r3, #4 |
58 | add r2, r2, #-4 |
59 | add r2, r2, #-4 |
59 | 60 | ||
60 | cmp r2, #0 |
61 | cmp r2, #0 |
61 | bne bootinfo_loop |
62 | bne bootinfo_loop |
62 | 63 | ||
63 | bootinfo_end: |
64 | bootinfo_end: |
64 | 65 | ||
65 | bl arch_pre_main |
66 | bl arch_pre_main |
66 | 67 | ||
67 | bl main_bsp |
68 | bl main_bsp |
68 | 69 | ||
69 | .space TEMP_STACK_SIZE |
70 | .space TEMP_STACK_SIZE |
70 | temp_stack: |
71 | temp_stack: |
71 | 72 | ||
72 | .space 1024 |
73 | .space 1024 |
73 | exc_stack: |
74 | exc_stack: |
74 | 75 | ||
75 | supervisor_sp: |
76 | supervisor_sp: |
76 | .space 4 |
77 | .space 4 |
77 | 78 | ||
78 | 79 |