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| 1 | # |
1 | # |
| 2 | # Copyright (C) 2001-2004 Jakub Jermar |
2 | # Copyright (C) 2001-2004 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 | # |
29 | # |
| 30 | # Init code for application processors. |
30 | # Init code for application processors. |
| 31 | # |
31 | # |
| 32 | 32 | ||
| 33 | .text |
33 | .section K_TEXT_START_2 |
| 34 | 34 | ||
| 35 | #ifdef __SMP__ |
35 | #ifdef __SMP__ |
| 36 | 36 | ||
| 37 | .global ap_boot |
37 | .global ap_boot |
| 38 | 38 | ||
| 39 | KTEXT=8 |
39 | KTEXT=8 |
| 40 | KDATA=16 |
40 | KDATA=16 |
| 41 | 41 | ||
| 42 | # This piece of code is real-mode and is meant to be alligned at 4K boundary. |
42 | # This piece of code is real-mode and is meant to be alligned at 4K boundary. |
| 43 | # The requirement for such an alignment comes from MP Specification's STARTUP IPI |
43 | # The requirement for such an alignment comes from MP Specification's STARTUP IPI |
| 44 | # requirements. |
44 | # requirements. |
| 45 | 45 | ||
| 46 | .align 4096 |
46 | .align 4096 |
| 47 | ap_boot: |
47 | ap_boot: |
| 48 | .code16 |
48 | .code16 |
| 49 | cli |
49 | cli |
| 50 | - | ||
| 51 | xorw %ax,%ax |
50 | xorw %ax,%ax |
| 52 | movw %ax,%ds |
51 | movw %ax,%ds |
| 53 | 52 | ||
| 54 | lgdt gdtr |
53 | lgdt gdtr |
| 55 | movl %cr0,%eax |
54 | movl %cr0,%eax |
| 56 | orl $1,%eax |
55 | orl $1,%eax |
| 57 | movl %eax,%cr0 |
56 | movl %eax,%cr0 |
| - | 57 | jmp 0f |
|
| - | 58 | 0: |
|
| 58 | ljmp $KTEXT,$jump_to_kernel |
59 | ljmp $KTEXT,$jump_to_kernel |
| 59 | 60 | ||
| 60 | # this is where the AP enters the kernel space |
61 | # this is where the AP enters the kernel space |
| 61 | jump_to_kernel: |
62 | jump_to_kernel: |
| 62 | .code32 |
63 | .code32 |
| 63 | movw $KDATA,%ax |
64 | movw $KDATA,%ax |
| 64 | movw %ax,%ds |
65 | movw %ax,%ds |
| 65 | movw %ax,%es |
66 | movw %ax,%es |
| 66 | movw %ax,%ss |
67 | movw %ax,%ss |
| 67 | movl $ctx,%eax |
68 | movl $(ctx-0x80000000),%eax # KA2PA((__address) &ctx) |
| 68 | movl (%eax),%esp |
69 | movl (%eax),%esp |
| 69 | 70 | ||
| 70 | lidt idtr |
71 | lidt idtr |
| 71 | 72 | ||
| - | 73 | call map_kernel |
|
| - | 74 | ||
| 72 | ljmp $KTEXT,$main_ap |
75 | ljmp $KTEXT,$main_ap |
| 73 | 76 | ||
| 74 | #endif /* __SMP__ */ |
77 | #endif /* __SMP__ */ |
| 75 | 78 | ||