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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/regdef.h> |
29 | #include <arch/regdef.h> |
30 | 30 | ||
31 | .register %g2, #scratch |
31 | .register %g2, #scratch |
32 | .register %g3, #scratch |
32 | .register %g3, #scratch |
33 | .register %g6, #scratch |
33 | .register %g6, #scratch |
34 | .register %g7, #scratch |
34 | .register %g7, #scratch |
35 | 35 | ||
36 | .section K_TEXT_START, "ax" |
36 | .section K_TEXT_START, "ax" |
37 | 37 | ||
38 | /* |
38 | /* |
39 | * Here is where the kernel is passed control |
39 | * Here is where the kernel is passed control |
40 | * from the boot loader. |
40 | * from the boot loader. |
41 | * |
41 | * |
42 | * The registers are expected to be in this state: |
42 | * The registers are expected to be in this state: |
43 | * %o0 bootinfo structure address |
43 | * - %o0 bootinfo structure address |
44 | * %o1 bootinfo structure size |
44 | * - %o1 bootinfo structure size |
- | 45 | * |
|
- | 46 | * Moreover, we depend on boot having established the |
|
- | 47 | * following environment: |
|
- | 48 | * - TLBs are on |
|
- | 49 | * - identity mapping for the kernel image |
|
- | 50 | * - identity mapping for memory stack |
|
45 | */ |
51 | */ |
46 | 52 | ||
47 | .global kernel_image_start |
53 | .global kernel_image_start |
48 | kernel_image_start: |
54 | kernel_image_start: |
49 | flushw ! flush all but the active register window |
55 | flushw ! flush all but the active register window |
50 | 56 | ||
51 | /* |
57 | /* |
52 | * Disable interrupts and disable 32-bit address masking. |
58 | * Disable interrupts and disable 32-bit address masking. |
53 | */ |
59 | */ |
54 | rdpr %pstate, %l0 |
60 | rdpr %pstate, %l0 |
55 | and %l0, ~(PSTATE_AM_BIT|PSTATE_IE_BIT), %l0 |
61 | and %l0, ~(PSTATE_AM_BIT|PSTATE_IE_BIT), %l0 |
56 | wrpr %l0, 0, %pstate |
62 | wrpr %l0, 0, %pstate |
57 | 63 | ||
58 | /* |
64 | /* |
59 | * Copy the bootinfo structure passed from the boot loader |
65 | * Copy the bootinfo structure passed from the boot loader |
60 | * to the kernel bootinfo structure. |
66 | * to the kernel bootinfo structure. |
61 | */ |
67 | */ |
62 | mov %o1, %o2 |
68 | mov %o1, %o2 |
63 | mov %o0, %o1 |
69 | mov %o0, %o1 |
64 | set bootinfo, %o0 |
70 | set bootinfo, %o0 |
65 | call memcpy |
71 | call memcpy |
66 | nop |
72 | nop |
- | 73 | ||
- | 74 | /* |
|
- | 75 | * Take over control of identity mapping. |
|
- | 76 | * Take over control of trap table. |
|
- | 77 | * |
|
- | 78 | * After this call, the kernel is entirely self-sufficient |
|
- | 79 | * and independent on OpenFirmware. |
|
- | 80 | */ |
|
- | 81 | set kernel_image_start, %o0 |
|
- | 82 | call take_over_tlb_and_tt |
|
- | 83 | nop |
|
67 | 84 | ||
68 | wrpr %r0, 0, %pil |
85 | wrpr %r0, 0, %pil |
69 | 86 | ||
70 | call main_bsp |
87 | call main_bsp |
71 | nop |
88 | nop |
72 | 89 | ||
73 | /* Not reached. */ |
90 | /* Not reached. */ |
74 | 91 | ||
75 | 2: |
92 | 2: |
76 | b 2b |
93 | b 2b |
77 | nop |
94 | nop |
78 | 95 | ||
79 | 96 | ||
80 |
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97 |
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81 | 98 | ||
82 | 99 | ||
83 | 100 |