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1 | # |
1 | # |
2 | # Copyright (C) 2001-2004 Jakub Jermar |
2 | # Copyright (C) 2001-2004 Ondrej Palkovsky |
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 | #define __ASM__ |
|
- | 30 | ||
- | 31 | #include <arch/mm/page.h> |
|
29 | #include <arch/mm/ptl.h> |
32 | #include <arch/mm/ptl.h> |
- | 33 | #include <arch/pm.h> |
|
30 | 34 | ||
31 | #define START_STACK 0x7c00 |
35 | #define START_STACK 0x7c00 |
32 | #define START_STACK_64 $0xffffffff80007c00 |
36 | #define START_STACK_64 $0xffffffff80007c00 |
33 | 37 | ||
34 | # |
38 | # |
35 | # This is where we require any SPARTAN-kernel-compatible boot loader |
39 | # This is where we require any SPARTAN-kernel-compatible boot loader |
36 | # to pass control in real mode. |
40 | # to pass control in real mode. |
37 | # |
41 | # |
38 | # Protected mode tables are statically initialised during compile |
42 | # Protected mode tables are statically initialised during compile |
39 | # time. So we can just load the respective table registers and |
43 | # time. So we can just load the respective table registers and |
40 | # switch to protected mode. |
44 | # switch to protected mode. |
41 | # |
45 | # |
42 | .section K_TEXT_START |
46 | .section K_TEXT_START |
43 | .code16 |
47 | .code16 |
44 | .global kernel_image_start |
48 | .global kernel_image_start |
45 | kernel_image_start: |
49 | kernel_image_start: |
46 | cli |
50 | cli |
47 | xorw %ax,%ax |
51 | xorw %ax,%ax |
48 | movw %ax,%ds |
52 | movw %ax,%ds |
49 | movw %ax,%ss # initialize stack segment register |
53 | movw %ax,%ss # initialize stack segment register |
50 | movl START_STACK,%esp # initialize stack pointer |
54 | movl START_STACK,%esp # initialize stack pointer |
51 | 55 | ||
52 | # call memmap_arch_init |
56 | # call memmap_arch_init |
53 | 57 | ||
54 | mov $0x80000000, %eax |
58 | movl $0x80000000, %eax |
55 | cpuid |
59 | cpuid |
56 | cmp $0x80000000, %eax # any function > 80000000h? |
60 | cmp $0x80000000, %eax # any function > 80000000h? |
57 | jbe no_long_mode |
61 | jbe no_long_mode |
58 | mov $0x80000001, %eax # Extended function code 80000001 |
62 | movl $0x80000001, %eax # Extended function code 80000001 |
59 | cpuid |
63 | cpuid |
60 | bt $29, %edx # Test if long mode is supported. |
64 | bt $29, %edx # Test if long mode is supported. |
61 | jnc no_long_mode |
65 | jnc no_long_mode |
62 | 66 | ||
63 | # Load gdtr, idtr |
67 | # Load gdtr, idtr |
64 | lgdt gdtr_inst |
68 | lgdt gdtr_inst |
65 | lidt idtr_inst |
69 | lidt idtr_inst |
66 | 70 | ||
67 | movl %cr0,%eax |
71 | movl %cr0,%eax |
68 | orl $0x1,%eax |
72 | orl $0x1,%eax |
69 | movl %eax,%cr0 # switch to protected mode |
73 | movl %eax,%cr0 # switch to protected mode |
70 | 74 | ||
71 | jmpl $40, $now_in_prot |
75 | jmpl $selector(KTEXT32_DES), $now_in_prot |
72 | 76 | ||
73 | no_long_mode: |
77 | no_long_mode: |
74 | 1: |
78 | 1: |
75 | jmp 1b |
79 | jmp 1b |
76 | 80 | ||
77 | # Protected 16-bit. We want to reuse the code-seg descriptor, |
81 | # Protected 16-bit. We want to reuse the code-seg descriptor, |
78 | # the Default operand size must not be 1 when entering long mode |
82 | # the Default operand size must not be 1 when entering long mode |
79 | now_in_prot: |
83 | now_in_prot: |
80 | # Set up stack & data descriptors |
84 | # Set up stack & data descriptors |
81 | movw $16, %ax |
85 | movw $selector(KDATA_DES), %ax |
82 | movw %ax, %ds |
86 | movw %ax, %ds |
83 | movw %ax, %fs |
87 | movw %ax, %fs |
84 | movw %ax, %gs |
88 | movw %ax, %gs |
85 | movw %ax, %ss |
89 | movw %ax, %ss |
86 | 90 | ||
87 | # Enable 64-bit page transaltion entries - CR4.PAE = 1. |
91 | # Enable 64-bit page transaltion entries - CR4.PAE = 1. |
88 | # Paging is not enabled until after long mode is enabled |
92 | # Paging is not enabled until after long mode is enabled |
89 | movl %cr4, %eax |
93 | movl %cr4, %eax |
90 | btsl $5, %eax |
94 | btsl $5, %eax |
91 | movl %eax, %cr4 |
95 | movl %eax, %cr4 |
92 | 96 | ||
93 | # Set up paging tables |
97 | # Set up paging tables |
94 | leal ptl_0, %eax |
98 | leal ptl_0, %eax |
95 | movl %eax, %cr3 |
99 | movl %eax, %cr3 |
96 | 100 | ||
97 | # Enable long mode |
101 | # Enable long mode |
98 | movl $0xc0000080, %ecx # EFER MSR number |
102 | movl $0xc0000080, %ecx # EFER MSR number |
99 | rdmsr # Read EFER |
103 | rdmsr # Read EFER |
100 | btsl $8, %eax # Set LME=1 |
104 | btsl $8, %eax # Set LME=1 |
101 | wrmsr # Write EFER |
105 | wrmsr # Write EFER |
102 | 106 | ||
103 | # Enable paging to activate long mode (set CR0.PG=1) |
107 | # Enable paging to activate long mode (set CR0.PG=1) |
104 | movl %cr0, %eax |
108 | movl %cr0, %eax |
105 | btsl $31, %eax |
109 | btsl $31, %eax |
106 | movl %eax, %cr0 |
110 | movl %eax, %cr0 |
107 | 111 | ||
108 | # At this point we are in compatibility mode |
112 | # At this point we are in compatibility mode |
109 | jmpl $8, $start64 |
113 | jmpl $selector(KTEXT_DES), $start64 |
110 | 114 | ||
111 | .code64 |
115 | .code64 |
112 | start64: |
116 | start64: |
113 | movq START_STACK_64, %rsp |
117 | movq START_STACK_64, %rsp |
114 | 118 | ||
115 | lidt idtr_inst |
119 | lidt idtr_inst |
116 | 120 | ||
117 | call main_bsp # never returns |
121 | call main_bsp # never returns |
118 | 1: |
122 | 1: |
119 | jmp 1b |
123 | jmp 1b |
120 | 124 | ||
121 | 125 | ||
122 | .section K_DATA_START |
126 | .section K_DATA_START |
123 | .align 4096 |
127 | .align 4096 |
124 | .global ptl_2 |
128 | .global ptl_2 |
125 | ptl_2: |
129 | ptl_2: |
126 | .quad 0x0 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
130 | .quad 0x0 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
127 | .quad 0x200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
131 | .quad 0x200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
128 | .quad 0x400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
132 | .quad 0x400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
129 | .quad 0x600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
133 | .quad 0x600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
130 | .quad 0x800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
134 | .quad 0x800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
131 | .quad 0xa00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
135 | .quad 0xa00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
132 | .quad 0xc00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
136 | .quad 0xc00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
133 | .quad 0xe00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
137 | .quad 0xe00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
134 | 138 | ||
135 | .align 4096 |
139 | .align 4096 |
136 | .global ptl_1 |
140 | .global ptl_1 |
137 | ptl_1: |
141 | ptl_1: |
138 | .quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT) |
142 | .quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT) |
139 | .fill 509,8,0 |
143 | .fill 509,8,0 |
140 | .quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT) |
144 | .quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT) |
141 | .fill 2,8,0 |
145 | .fill 2,8,0 |
142 | 146 | ||
143 | .align 4096 |
147 | .align 4096 |
144 | .global ptl_0 |
148 | .global ptl_0 |
145 | ptl_0: |
149 | ptl_0: |
146 | .quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT) |
150 | .quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT) |
147 | .fill 510,8,0 |
151 | .fill 510,8,0 |
148 | .quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT) |
152 | .quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT) |
149 | 153 | ||
150 | .global gdtr_inst |
154 | .global gdtr_inst |
151 | gdtr_inst: |
155 | gdtr_inst: |
152 | .word 7*8 # GDT_ITEMS * 8 |
156 | .word selector(GDT_ITEMS) |
153 | .long gdt + 0x80000000 |
157 | .long KA2PA(gdt) |
154 | 158 | ||
155 | .global idtr_inst |
159 | .global idtr_inst |
156 | idtr_inst: |
160 | idtr_inst: |
157 | .word 0 |
161 | .word 0 |
158 | .long idt + 0x80000000 |
162 | .long KA2PA(idt) |
159 | 163 |