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1 | # |
1 | # |
2 | # Copyright (c) 2001-2004 Jakub Jermar |
2 | # Copyright (c) 2001-2004 Jakub Jermar |
3 | # Copyright (c) 2005-2006 Martin Decky |
3 | # Copyright (c) 2005-2006 Martin Decky |
4 | # All rights reserved. |
4 | # All rights reserved. |
5 | # |
5 | # |
6 | # Redistribution and use in source and binary forms, with or without |
6 | # Redistribution and use in source and binary forms, with or without |
7 | # modification, are permitted provided that the following conditions |
7 | # modification, are permitted provided that the following conditions |
8 | # are met: |
8 | # are met: |
9 | # |
9 | # |
10 | # - Redistributions of source code must retain the above copyright |
10 | # - Redistributions of source code must retain the above copyright |
11 | # notice, this list of conditions and the following disclaimer. |
11 | # notice, this list of conditions and the following disclaimer. |
12 | # - Redistributions in binary form must reproduce the above copyright |
12 | # - Redistributions in binary form must reproduce the above copyright |
13 | # notice, this list of conditions and the following disclaimer in the |
13 | # notice, this list of conditions and the following disclaimer in the |
14 | # documentation and/or other materials provided with the distribution. |
14 | # documentation and/or other materials provided with the distribution. |
15 | # - The name of the author may not be used to endorse or promote products |
15 | # - The name of the author may not be used to endorse or promote products |
16 | # derived from this software without specific prior written permission. |
16 | # derived from this software without specific prior written permission. |
17 | # |
17 | # |
18 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
22 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
24 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
27 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | # |
28 | # |
29 | 29 | ||
30 | # |
30 | # |
31 | # Init code for application processors. |
31 | # Init code for application processors. |
32 | # |
32 | # |
33 | 33 | ||
34 | #include <arch/boot/boot.h> |
34 | #include <arch/boot/boot.h> |
35 | #include <arch/boot/memmap.h> |
35 | #include <arch/boot/memmap.h> |
36 | #include <arch/mm/page.h> |
36 | #include <arch/mm/page.h> |
37 | #include <arch/pm.h> |
37 | #include <arch/pm.h> |
38 | 38 | ||
39 | .section K_TEXT_START, "ax" |
39 | .section K_TEXT_START, "ax" |
40 | 40 | ||
41 | #ifdef CONFIG_SMP |
41 | #ifdef CONFIG_SMP |
42 | 42 | ||
43 | .global unmapped_ap_boot |
43 | .global unmapped_ap_boot |
44 | 44 | ||
45 | KTEXT=8 |
45 | KTEXT=8 |
46 | KDATA=16 |
46 | KDATA=16 |
47 | 47 | ||
48 | # This piece of code is real-mode and is meant to be alligned at 4K boundary. |
48 | # This piece of code is real-mode and is meant to be aligned at 4K boundary. |
49 | # The requirement for such an alignment comes from MP Specification's STARTUP IPI |
49 | # The requirement for such an alignment comes from MP Specification's STARTUP IPI |
50 | # requirements. |
50 | # requirements. |
51 | 51 | ||
52 | .align 4096 |
52 | .align 4096 |
53 | unmapped_ap_boot: |
53 | unmapped_ap_boot: |
54 | .code16 |
54 | .code16 |
55 | cli |
55 | cli |
56 | xorw %ax, %ax |
56 | xorw %ax, %ax |
57 | movw %ax, %ds |
57 | movw %ax, %ds |
58 | 58 | ||
59 | lgdtl ap_gdtr # initialize Global Descriptor Table register |
59 | lgdtl ap_gdtr # initialize Global Descriptor Table register |
60 | 60 | ||
61 | movl %cr0, %eax |
61 | movl %cr0, %eax |
62 | orl $1, %eax |
62 | orl $1, %eax |
63 | movl %eax, %cr0 # switch to protected mode |
63 | movl %eax, %cr0 # switch to protected mode |
64 | jmpl $KTEXT, $jump_to_kernel - BOOT_OFFSET + AP_BOOT_OFFSET |
64 | jmpl $KTEXT, $jump_to_kernel - BOOT_OFFSET + AP_BOOT_OFFSET |
65 | 65 | ||
66 | jump_to_kernel: |
66 | jump_to_kernel: |
67 | .code32 |
67 | .code32 |
68 | movw $KDATA, %ax |
68 | movw $KDATA, %ax |
69 | movw %ax, %ds |
69 | movw %ax, %ds |
70 | movw %ax, %es |
70 | movw %ax, %es |
71 | movw %ax, %ss |
71 | movw %ax, %ss |
72 | movl $KA2PA(ctx), %eax # KA2PA((uintptr_t) &ctx) |
72 | movl $KA2PA(ctx), %eax # KA2PA((uintptr_t) &ctx) |
73 | movl (%eax), %esp |
73 | movl (%eax), %esp |
74 | subl $0x80000000, %esp # KA2PA(ctx.sp) |
74 | subl $0x80000000, %esp # KA2PA(ctx.sp) |
75 | 75 | ||
76 | call map_kernel # map kernel and turn paging on |
76 | call map_kernel # map kernel and turn paging on |
77 | 77 | ||
78 | addl $0x80000000, %esp # PA2KA(ctx.sp) |
78 | addl $0x80000000, %esp # PA2KA(ctx.sp) |
79 | 79 | ||
80 | jmpl $KTEXT, $main_ap |
80 | jmpl $KTEXT, $main_ap |
81 | 81 | ||
82 | #endif /* CONFIG_SMP */ |
82 | #endif /* CONFIG_SMP */ |
83 | 83 | ||
84 | 84 | ||
85 | .section K_DATA_START, "aw", @progbits |
85 | .section K_DATA_START, "aw", @progbits |
86 | 86 | ||
87 | #ifdef CONFIG_SMP |
87 | #ifdef CONFIG_SMP |
88 | 88 | ||
89 | .global unmapped_ap_gdtr |
89 | .global unmapped_ap_gdtr |
90 | 90 | ||
91 | unmapped_ap_gdtr: |
91 | unmapped_ap_gdtr: |
92 | .word 0 |
92 | .word 0 |
93 | .long 0 |
93 | .long 0 |
94 | 94 | ||
95 | #endif /* CONFIG_SMP */ |
95 | #endif /* CONFIG_SMP */ |
96 | 96 |