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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 | #include <arch/boot/boot.h> |
30 | #include <arch/boot/boot.h> |
31 | #include <arch/boot/memmap.h> |
31 | #include <arch/boot/memmap.h> |
32 | #include <arch/mm/page.h> |
32 | #include <arch/mm/page.h> |
33 | #include <arch/pm.h> |
33 | #include <arch/pm.h> |
34 | 34 | ||
35 | #define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE) |
35 | #define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE) |
36 | 36 | ||
37 | .section K_TEXT_START, "ax" |
37 | .section K_TEXT_START, "ax" |
38 | 38 | ||
39 | KTEXT=8 |
39 | KTEXT=8 |
40 | KDATA=16 |
40 | KDATA=16 |
41 | 41 | ||
42 | .code32 |
42 | .code32 |
43 | .align 4 |
43 | .align 4 |
44 | .global multiboot_image_start |
44 | .global multiboot_image_start |
45 | multiboot_header: |
45 | multiboot_header: |
46 | .long MULTIBOOT_HEADER_MAGIC |
46 | .long MULTIBOOT_HEADER_MAGIC |
47 | .long MULTIBOOT_HEADER_FLAGS |
47 | .long MULTIBOOT_HEADER_FLAGS |
48 | .long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum |
48 | .long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum |
49 | .long multiboot_header |
49 | .long multiboot_header |
50 | .long unmapped_ktext_start |
50 | .long unmapped_ktext_start |
51 | .long 0 |
51 | .long 0 |
52 | .long 0 |
52 | .long 0 |
53 | .long multiboot_image_start |
53 | .long multiboot_image_start |
54 | 54 | ||
55 | multiboot_image_start: |
55 | multiboot_image_start: |
56 | movl $START_STACK, %esp # initialize stack pointer |
56 | movl $START_STACK, %esp # initialize stack pointer |
57 | lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register |
57 | lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register |
58 | 58 | ||
59 | movw $KDATA, %cx |
59 | movw $KDATA, %cx |
60 | movw %cx, %es |
60 | movw %cx, %es |
61 | movw %cx, %gs |
61 | movw %cx, %gs |
62 | movw %cx, %fs |
62 | movw %cx, %fs |
63 | movw %cx, %ds # kernel data + stack |
63 | movw %cx, %ds # kernel data + stack |
64 | movw %cx, %ss |
64 | movw %cx, %ss |
65 | 65 | ||
66 | jmpl $KTEXT, $multiboot_meeting_point |
66 | jmpl $KTEXT, $multiboot_meeting_point |
67 | multiboot_meeting_point: |
67 | multiboot_meeting_point: |
68 | 68 | ||
69 | pushl %ebx # save parameters from GRUB |
69 | pushl %ebx # save parameters from GRUB |
70 | pushl %eax |
70 | pushl %eax |
71 | 71 | ||
72 | call map_kernel # map kernel and turn paging on |
72 | call map_kernel # map kernel and turn paging on |
73 | 73 | ||
74 | popl %eax |
74 | popl %eax |
75 | popl %ebx |
75 | popl %ebx |
76 | cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature |
76 | cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature |
77 | je valid_boot |
77 | je valid_boot |
78 | 78 | ||
79 | xorl %ecx, %ecx # no memory size or map available |
79 | xorl %ecx, %ecx # no memory size or map available |
80 | movl %ecx, e801memorysize |
80 | movl %ecx, e801memorysize |
81 | movl %ecx, e820counter |
81 | movl %ecx, e820counter |
82 | 82 | ||
83 | jmp invalid_boot |
83 | jmp invalid_boot |
84 | 84 | ||
85 | valid_boot: |
85 | valid_boot: |
86 | 86 | ||
87 | movl (%ebx), %eax # ebx = physical address of struct multiboot_info |
87 | movl (%ebx), %eax # ebx = physical address of struct multiboot_info |
88 | 88 | ||
89 | bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid) |
89 | bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid) |
90 | jc mem_valid |
90 | jc mem_valid |
91 | 91 | ||
92 | xorl %ecx, %ecx |
92 | xorl %ecx, %ecx |
93 | jmp mem_invalid |
93 | jmp mem_invalid |
94 | 94 | ||
95 | mem_valid: |
95 | mem_valid: |
96 | movl 4(%ebx), %ecx # mbi->mem_lower |
96 | movl 4(%ebx), %ecx # mbi->mem_lower |
97 | addl 8(%ebx), %ecx # mbi->mem_upper |
97 | addl 8(%ebx), %ecx # mbi->mem_upper |
98 | 98 | ||
99 | mem_invalid: |
99 | mem_invalid: |
100 | movl %ecx, e801memorysize |
100 | movl %ecx, e801memorysize |
101 | 101 | ||
102 | bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid) |
102 | bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid) |
103 | jc mods_valid |
103 | jc mods_valid |
104 | 104 | ||
105 | xorl %ecx, %ecx |
105 | xorl %ecx, %ecx |
106 | xorl %edx, %edx |
106 | movl %ecx, init |
107 | jmp mods_invalid |
107 | jmp mods_end |
108 | 108 | ||
109 | mods_valid: |
109 | mods_valid: |
- | 110 | ||
110 | movl 20(%ebx), %ecx # mbi->mods_count |
111 | movl 20(%ebx), %ecx # mbi->mods_count |
- | 112 | movl %ecx, init |
|
- | 113 | ||
111 | cmpl $0, %ecx |
114 | cmpl $0, %ecx |
112 | je mods_invalid |
115 | je mods_end |
113 | 116 | ||
114 | movl 24(%ebx), %esi # mbi->mods_addr |
117 | movl 24(%ebx), %esi # mbi->mods_addr |
- | 118 | movl $init, %edi |
|
- | 119 | ||
- | 120 | mods_loop: |
|
- | 121 | ||
115 | movl 0(%esi), %edx # mods->mod_start |
122 | movl 0(%esi), %edx # mods->mod_start |
- | 123 | addl $0x80000000, %edx |
|
- | 124 | movl %edx, 4(%edi) |
|
- | 125 | ||
- | 126 | movl 4(%esi), %edx |
|
116 | movl 4(%esi), %ecx # mods->mod_end |
127 | subl 0(%esi), %edx # mods->mod_end - mods->mod_start |
117 | subl %edx, %ecx |
128 | movl %edx, 8(%edi) |
- | 129 | ||
- | 130 | addl $16, %esi |
|
118 | addl $0x80000000, %edx |
131 | addl $8 , %edi |
119 | 132 | ||
120 | mods_invalid: |
133 | loop mods_loop |
121 | movl %ecx, init_size |
134 | |
122 | movl %edx, init_addr |
135 | mods_end: |
123 | 136 | ||
124 | bt $6, %eax # mbi->flags[6] (mmap_length, mmap_addr valid) |
137 | bt $6, %eax # mbi->flags[6] (mmap_length, mmap_addr valid) |
125 | jc mmap_valid |
138 | jc mmap_valid |
126 | 139 | ||
127 | xorl %edx, %edx |
140 | xorl %edx, %edx |
128 | jmp mmap_invalid |
141 | jmp mmap_invalid |
129 | 142 | ||
130 | mmap_valid: |
143 | mmap_valid: |
131 | movl 44(%ebx), %ecx # mbi->mmap_length |
144 | movl 44(%ebx), %ecx # mbi->mmap_length |
132 | movl 48(%ebx), %esi # mbi->mmap_addr |
145 | movl 48(%ebx), %esi # mbi->mmap_addr |
133 | movl $e820table, %edi |
146 | movl $e820table, %edi |
134 | xorl %edx, %edx |
147 | xorl %edx, %edx |
135 | 148 | ||
136 | mmap_loop: |
149 | mmap_loop: |
137 | cmpl $0, %ecx |
150 | cmpl $0, %ecx |
138 | jle mmap_end |
151 | jle mmap_end |
139 | 152 | ||
140 | movl 4(%esi), %eax # mmap->base_addr_low |
153 | movl 4(%esi), %eax # mmap->base_addr_low |
141 | movl %eax, (%edi) |
154 | movl %eax, (%edi) |
142 | 155 | ||
143 | movl 8(%esi), %eax # mmap->base_addr_high |
156 | movl 8(%esi), %eax # mmap->base_addr_high |
144 | movl %eax, 4(%edi) |
157 | movl %eax, 4(%edi) |
145 | 158 | ||
146 | movl 12(%esi), %eax # mmap->length_low |
159 | movl 12(%esi), %eax # mmap->length_low |
147 | movl %eax, 8(%edi) |
160 | movl %eax, 8(%edi) |
148 | 161 | ||
149 | movl 16(%esi), %eax # mmap->length_high |
162 | movl 16(%esi), %eax # mmap->length_high |
150 | movl %eax, 12(%edi) |
163 | movl %eax, 12(%edi) |
151 | 164 | ||
152 | movl 20(%esi), %eax # mmap->type |
165 | movl 20(%esi), %eax # mmap->type |
153 | movl %eax, 16(%edi) |
166 | movl %eax, 16(%edi) |
154 | 167 | ||
155 | movl (%esi), %eax # mmap->size |
168 | movl (%esi), %eax # mmap->size |
156 | addl $0x4, %eax |
169 | addl $0x4, %eax |
157 | addl %eax, %esi |
170 | addl %eax, %esi |
158 | subl %eax, %ecx |
171 | subl %eax, %ecx |
159 | addl $MEMMAP_E820_RECORD_SIZE, %edi |
172 | addl $MEMMAP_E820_RECORD_SIZE, %edi |
160 | incl %edx |
173 | incl %edx |
161 | jmp mmap_loop |
174 | jmp mmap_loop |
162 | 175 | ||
163 | mmap_end: |
176 | mmap_end: |
164 | 177 | ||
165 | mmap_invalid: |
178 | mmap_invalid: |
166 | movl %edx, e820counter |
179 | movl %edx, e820counter |
167 | 180 | ||
168 | invalid_boot: |
181 | invalid_boot: |
169 | 182 | ||
170 | #ifdef CONFIG_SMP |
183 | #ifdef CONFIG_SMP |
171 | 184 | ||
172 | # copy AP bootstrap routines below 1 MB |
185 | # copy AP bootstrap routines below 1 MB |
173 | 186 | ||
174 | movl $BOOT_OFFSET, %esi |
187 | movl $BOOT_OFFSET, %esi |
175 | movl $AP_BOOT_OFFSET, %edi |
188 | movl $AP_BOOT_OFFSET, %edi |
176 | movl $_hardcoded_unmapped_size, %ecx |
189 | movl $_hardcoded_unmapped_size, %ecx |
177 | cld |
190 | cld |
178 | rep movsb |
191 | rep movsb |
179 | 192 | ||
180 | #endif |
193 | #endif |
181 | 194 | ||
182 | call main_bsp # never returns |
195 | call main_bsp # never returns |
183 | 196 | ||
184 | cli |
197 | cli |
185 | hlt |
198 | hlt |
186 | 199 | ||
187 | .global map_kernel |
200 | .global map_kernel |
188 | map_kernel: |
201 | map_kernel: |
189 | # |
202 | # |
190 | # Here we setup mapping for both the unmapped and mapped sections of the kernel. |
203 | # Here we setup mapping for both the unmapped and mapped sections of the kernel. |
191 | # For simplicity, we map the entire 4G space. |
204 | # For simplicity, we map the entire 4G space. |
192 | # |
205 | # |
193 | movl %cr4, %ecx |
206 | movl %cr4, %ecx |
194 | orl $(1<<4), %ecx |
207 | orl $(1<<4), %ecx |
195 | movl %ecx, %cr4 # turn PSE on |
208 | movl %ecx, %cr4 # turn PSE on |
196 | 209 | ||
197 | movl $(page_directory+0), %esi |
210 | movl $(page_directory+0), %esi |
198 | movl $(page_directory+2048), %edi |
211 | movl $(page_directory+2048), %edi |
199 | xorl %ecx, %ecx |
212 | xorl %ecx, %ecx |
200 | xorl %ebx, %ebx |
213 | xorl %ebx, %ebx |
201 | 0: |
214 | 0: |
202 | movl $((1<<7)|(1<<0)), %eax |
215 | movl $((1<<7)|(1<<0)), %eax |
203 | orl %ebx, %eax |
216 | orl %ebx, %eax |
204 | movl %eax, (%esi,%ecx,4) # mapping 0x00000000+%ecx*4M => 0x00000000+%ecx*4M |
217 | movl %eax, (%esi,%ecx,4) # mapping 0x00000000+%ecx*4M => 0x00000000+%ecx*4M |
205 | movl %eax, (%edi,%ecx,4) # mapping 0x80000000+%ecx*4M => 0x00000000+%ecx*4M |
218 | movl %eax, (%edi,%ecx,4) # mapping 0x80000000+%ecx*4M => 0x00000000+%ecx*4M |
206 | addl $(4*1024*1024), %ebx |
219 | addl $(4*1024*1024), %ebx |
207 | 220 | ||
208 | incl %ecx |
221 | incl %ecx |
209 | cmpl $512, %ecx |
222 | cmpl $512, %ecx |
210 | jl 0b |
223 | jl 0b |
211 | 224 | ||
212 | movl %esi, %cr3 |
225 | movl %esi, %cr3 |
213 | 226 | ||
214 | # turn paging on |
227 | # turn paging on |
215 | movl %cr0, %ebx |
228 | movl %cr0, %ebx |
216 | orl $(1<<31), %ebx |
229 | orl $(1<<31), %ebx |
217 | movl %ebx, %cr0 |
230 | movl %ebx, %cr0 |
218 | ret |
231 | ret |
219 | 232 | ||
220 | 233 | ||
221 | .section K_DATA_START, "aw", @progbits |
234 | .section K_DATA_START, "aw", @progbits |
222 | 235 | ||
223 | .align 4096 |
236 | .align 4096 |
224 | page_directory: |
237 | page_directory: |
225 | .space 4096, 0 |
238 | .space 4096, 0 |
226 | 239 |