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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 exc_stack |
35 | .global exc_stack |
| 36 | .global supervisor_sp |
36 | .global supervisor_sp |
| 37 | 37 | ||
| 38 | 38 | ||
| 39 | kernel_image_start: |
39 | kernel_image_start: |
| 40 | 40 | ||
| 41 | #switch to system mode |
41 | #switch to system mode |
| 42 | mrs r3, cpsr |
42 | mrs r3, cpsr |
| 43 | orr r3, r3, #0x1f |
43 | orr r3, r3, #0x1f |
| 44 | msr cpsr_c, r3 |
44 | msr cpsr_c, r3 |
| 45 | 45 | ||
| 46 | ldr sp, =end_stack |
46 | ldr sp, =end_stack |
| - | 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 | b halt |
70 | b halt |
| 70 | 71 | ||
| 71 | 72 | ||
| 72 | .space TEMP_STACK_SIZE |
73 | .space TEMP_STACK_SIZE |
| 73 | end_stack: |
74 | end_stack: |
| 74 | .space 1024 |
75 | .space 1024 |
| 75 | exc_stack: |
76 | exc_stack: |
| 76 | .space 4 |
77 | .space 4 |
| 77 | supervisor_sp: |
78 | supervisor_sp: |
| 78 | .space 4 |
79 | .space 4 |
| 79 | 80 | ||
| 80 | .space 4 |
81 | .space 4 |
| 81 | halt: |
82 | halt: |
| 82 | ldr r0,=0x10000010 |
83 | ldr r0,=0x10000010 |
| 83 | ldr r1, [r0] |
84 | ldr r1, [r0] |
| 84 | b halt |
85 | b halt |
| 85 | 86 | ||
| 86 | 87 | ||