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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 | #include <arch/cpu.h> |
38 | #include <arch/cpu.h> |
39 | #include <arch/cpuid.h> |
39 | #include <arch/cpuid.h> |
40 | 40 | ||
41 | .section K_TEXT_START, "ax" |
41 | .section K_TEXT_START, "ax" |
42 | 42 | ||
43 | #ifdef CONFIG_SMP |
43 | #ifdef CONFIG_SMP |
44 | 44 | ||
45 | .global unmapped_ap_boot |
45 | .global unmapped_ap_boot |
46 | 46 | ||
47 | # This piece of code is real-mode and is meant to be alligned at 4K boundary. |
47 | # This piece of code is real-mode and is meant to be alligned at 4K boundary. |
48 | # The requirement for such an alignment comes from MP Specification's STARTUP IPI |
48 | # The requirement for such an alignment comes from MP Specification's STARTUP IPI |
49 | # requirements. |
49 | # requirements. |
50 | 50 | ||
51 | .align 4096 |
51 | .align 4096 |
52 | unmapped_ap_boot: |
52 | unmapped_ap_boot: |
53 | .code16 |
53 | .code16 |
54 | cli |
54 | cli |
55 | xorw %ax, %ax |
55 | xorw %ax, %ax |
56 | movw %ax, %ds |
56 | movw %ax, %ds |
57 | 57 | ||
58 | lgdt ap_gdtr # initialize Global Descriptor Table register |
58 | lgdtl ap_gdtr # initialize Global Descriptor Table register |
59 | 59 | ||
60 | movl %cr0, %eax |
60 | movl %cr0, %eax |
61 | orl $1, %eax |
61 | orl $1, %eax |
62 | movl %eax, %cr0 # switch to protected mode |
62 | movl %eax, %cr0 # switch to protected mode |
63 | jmpl $gdtselector(KTEXT32_DES), $jump_to_kernel - BOOT_OFFSET + AP_BOOT_OFFSET |
63 | jmpl $gdtselector(KTEXT32_DES), $jump_to_kernel - BOOT_OFFSET + AP_BOOT_OFFSET |
64 | 64 | ||
65 | jump_to_kernel: |
65 | jump_to_kernel: |
66 | .code32 |
66 | .code32 |
67 | movw $gdtselector(KDATA_DES), %ax |
67 | movw $gdtselector(KDATA_DES), %ax |
68 | movw %ax, %ds |
68 | movw %ax, %ds |
69 | movw %ax, %es |
69 | movw %ax, %es |
70 | movw %ax, %ss |
70 | movw %ax, %ss |
71 | movw $gdtselector(UDATA_DES), %ax |
71 | movw $gdtselector(UDATA_DES), %ax |
72 | movw %ax, %gs |
72 | movw %ax, %gs |
73 | 73 | ||
74 | # Enable 64-bit page transaltion entries - CR4.PAE = 1. |
74 | # Enable 64-bit page transaltion entries - CR4.PAE = 1. |
75 | # Paging is not enabled until after long mode is enabled |
75 | # Paging is not enabled until after long mode is enabled |
76 | 76 | ||
77 | movl %cr4, %eax |
77 | movl %cr4, %eax |
78 | btsl $5, %eax |
78 | btsl $5, %eax |
79 | movl %eax, %cr4 |
79 | movl %eax, %cr4 |
80 | 80 | ||
81 | leal ptl_0, %eax |
81 | leal ptl_0, %eax |
82 | movl %eax, %cr3 |
82 | movl %eax, %cr3 |
83 | 83 | ||
84 | # Enable long mode |
84 | # Enable long mode |
85 | movl $EFER_MSR_NUM, %ecx # EFER MSR number |
85 | movl $EFER_MSR_NUM, %ecx # EFER MSR number |
86 | rdmsr # Read EFER |
86 | rdmsr # Read EFER |
87 | btsl $AMD_LME_FLAG, %eax # Set LME=1 |
87 | btsl $AMD_LME_FLAG, %eax # Set LME=1 |
88 | wrmsr # Write EFER |
88 | wrmsr # Write EFER |
89 | 89 | ||
90 | # Enable paging to activate long mode (set CR0.PG=1) |
90 | # Enable paging to activate long mode (set CR0.PG=1) |
91 | movl %cr0, %eax |
91 | movl %cr0, %eax |
92 | btsl $31, %eax |
92 | btsl $31, %eax |
93 | movl %eax, %cr0 |
93 | movl %eax, %cr0 |
94 | 94 | ||
95 | # At this point we are in compatibility mode |
95 | # At this point we are in compatibility mode |
96 | jmpl $gdtselector(KTEXT_DES), $start64 - BOOT_OFFSET + AP_BOOT_OFFSET |
96 | jmpl $gdtselector(KTEXT_DES), $start64 - BOOT_OFFSET + AP_BOOT_OFFSET |
97 | 97 | ||
98 | .code64 |
98 | .code64 |
99 | start64: |
99 | start64: |
100 | movq (ctx), %rsp |
100 | movq (ctx), %rsp |
101 | call main_ap - AP_BOOT_OFFSET + BOOT_OFFSET # never returns |
101 | call main_ap - AP_BOOT_OFFSET + BOOT_OFFSET # never returns |
102 | 102 | ||
103 | #endif /* CONFIG_SMP */ |
103 | #endif /* CONFIG_SMP */ |
104 | 104 | ||
105 | .section K_DATA_START, "aw", @progbits |
105 | .section K_DATA_START, "aw", @progbits |
106 | 106 | ||
107 | #ifdef CONFIG_SMP |
107 | #ifdef CONFIG_SMP |
108 | 108 | ||
109 | .global unmapped_ap_gdtr |
109 | .global unmapped_ap_gdtr |
110 | 110 | ||
111 | unmapped_ap_gdtr: |
111 | unmapped_ap_gdtr: |
112 | .word 0 |
112 | .word 0 |
113 | .long 0 |
113 | .long 0 |
114 | 114 | ||
115 | #endif /* CONFIG_SMP */ |
115 | #endif /* CONFIG_SMP */ |
116 | 116 |