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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 | .code32 |
39 | .code32 |
40 | .align 4 |
40 | .align 4 |
41 | .global multiboot_image_start |
41 | .global multiboot_image_start |
42 | multiboot_header: |
42 | multiboot_header: |
43 | .long MULTIBOOT_HEADER_MAGIC |
43 | .long MULTIBOOT_HEADER_MAGIC |
44 | .long MULTIBOOT_HEADER_FLAGS |
44 | .long MULTIBOOT_HEADER_FLAGS |
45 | .long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum |
45 | .long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum |
46 | .long multiboot_header |
46 | .long multiboot_header |
47 | .long unmapped_ktext_start |
47 | .long unmapped_ktext_start |
48 | .long 0 |
48 | .long 0 |
49 | .long 0 |
49 | .long 0 |
50 | .long multiboot_image_start |
50 | .long multiboot_image_start |
51 | 51 | ||
52 | multiboot_image_start: |
52 | multiboot_image_start: |
53 | movl $START_STACK, %esp # initialize stack pointer |
53 | movl $START_STACK, %esp # initialize stack pointer |
54 | lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register |
54 | lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register |
55 | 55 | ||
56 | movw $selector(KDATA_DES), %cx |
56 | movw $selector(KDATA_DES), %cx |
57 | movw %cx, %es |
57 | movw %cx, %es |
58 | movw %cx, %fs |
58 | movw %cx, %fs |
59 | movw %cx, %gs |
59 | movw %cx, %gs |
60 | movw %cx, %ds # kernel data + stack |
60 | movw %cx, %ds # kernel data + stack |
61 | movw %cx, %ss |
61 | movw %cx, %ss |
62 | 62 | ||
63 | jmpl $selector(KTEXT_DES), $multiboot_meeting_point |
63 | jmpl $selector(KTEXT_DES), $multiboot_meeting_point |
64 | multiboot_meeting_point: |
64 | multiboot_meeting_point: |
65 | 65 | ||
66 | pushl %ebx # save parameters from GRUB |
66 | pushl %ebx # save parameters from GRUB |
67 | pushl %eax |
67 | pushl %eax |
68 | 68 | ||
69 | #ifdef CONFIG_FB |
69 | #ifdef CONFIG_FB |
70 | mov $vesa_init, %esi |
70 | mov $vesa_init, %esi |
71 | mov $VESA_INIT_SEGMENT << 4, %edi |
71 | mov $VESA_INIT_SEGMENT << 4, %edi |
72 | mov $e_vesa_init - vesa_init, %ecx |
72 | mov $e_vesa_init - vesa_init, %ecx |
73 | cld |
73 | cld |
74 | rep movsb |
74 | rep movsb |
75 | 75 | ||
76 | mov $VESA_INIT_SEGMENT << 4, %edi |
76 | mov $VESA_INIT_SEGMENT << 4, %edi |
77 | jmpl %edi |
77 | jmpl *%edi |
78 | 78 | ||
79 | vesa_meeting_point: |
79 | vesa_meeting_point: |
80 | 80 | ||
81 | mov %esi, KA2PA(vesa_ph_addr) |
81 | mov %esi, KA2PA(vesa_ph_addr) |
82 | mov %di, KA2PA(vesa_height) |
82 | mov %di, KA2PA(vesa_height) |
83 | shr $16, %edi |
83 | shr $16, %edi |
84 | mov %di, KA2PA(vesa_width) |
84 | mov %di, KA2PA(vesa_width) |
85 | mov %bx, KA2PA(vesa_scanline) |
85 | mov %bx, KA2PA(vesa_scanline) |
86 | shr $16, %ebx |
86 | shr $16, %ebx |
87 | mov %bx, KA2PA(vesa_bpp) |
87 | mov %bx, KA2PA(vesa_bpp) |
88 | #endif |
88 | #endif |
89 | 89 | ||
90 | call map_kernel # map kernel and turn paging on |
90 | call map_kernel # map kernel and turn paging on |
91 | 91 | ||
92 | popl %eax |
92 | popl %eax |
93 | popl %ebx |
93 | popl %ebx |
94 | cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature |
94 | cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature |
95 | je valid_boot |
95 | je valid_boot |
96 | 96 | ||
97 | xorl %ecx, %ecx # no memory size or map available |
97 | xorl %ecx, %ecx # no memory size or map available |
98 | movl %ecx, e801memorysize |
98 | movl %ecx, e801memorysize |
99 | movl %ecx, e820counter |
99 | movl %ecx, e820counter |
100 | 100 | ||
101 | jmp invalid_boot |
101 | jmp invalid_boot |
102 | 102 | ||
103 | valid_boot: |
103 | valid_boot: |
104 | 104 | ||
105 | movl (%ebx), %eax # ebx = physical address of struct multiboot_info |
105 | movl (%ebx), %eax # ebx = physical address of struct multiboot_info |
106 | 106 | ||
107 | bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid) |
107 | bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid) |
108 | jc mem_valid |
108 | jc mem_valid |
109 | 109 | ||
110 | xorl %ecx, %ecx |
110 | xorl %ecx, %ecx |
111 | jmp mem_invalid |
111 | jmp mem_invalid |
112 | 112 | ||
113 | mem_valid: |
113 | mem_valid: |
114 | movl 4(%ebx), %ecx # mbi->mem_lower |
114 | movl 4(%ebx), %ecx # mbi->mem_lower |
115 | addl 8(%ebx), %ecx # mbi->mem_upper |
115 | addl 8(%ebx), %ecx # mbi->mem_upper |
116 | 116 | ||
117 | mem_invalid: |
117 | mem_invalid: |
118 | movl %ecx, e801memorysize |
118 | movl %ecx, e801memorysize |
119 | 119 | ||
120 | bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid) |
120 | bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid) |
121 | jc mods_valid |
121 | jc mods_valid |
122 | 122 | ||
123 | xorl %ecx, %ecx |
123 | xorl %ecx, %ecx |
124 | movl %ecx, init |
124 | movl %ecx, init |
125 | jmp mods_end |
125 | jmp mods_end |
126 | 126 | ||
127 | mods_valid: |
127 | mods_valid: |
128 | 128 | ||
129 | movl 20(%ebx), %ecx # mbi->mods_count |
129 | movl 20(%ebx), %ecx # mbi->mods_count |
130 | movl %ecx, init |
130 | movl %ecx, init |
131 | 131 | ||
132 | cmpl $0, %ecx |
132 | cmpl $0, %ecx |
133 | je mods_end |
133 | je mods_end |
134 | 134 | ||
135 | movl 24(%ebx), %esi # mbi->mods_addr |
135 | movl 24(%ebx), %esi # mbi->mods_addr |
136 | movl $init, %edi |
136 | movl $init, %edi |
137 | 137 | ||
138 | mods_loop: |
138 | mods_loop: |
139 | 139 | ||
140 | movl 0(%esi), %edx # mods->mod_start |
140 | movl 0(%esi), %edx # mods->mod_start |
141 | addl $0x80000000, %edx |
141 | addl $0x80000000, %edx |
142 | movl %edx, 4(%edi) |
142 | movl %edx, 4(%edi) |
143 | 143 | ||
144 | movl 4(%esi), %edx |
144 | movl 4(%esi), %edx |
145 | subl 0(%esi), %edx # mods->mod_end - mods->mod_start |
145 | subl 0(%esi), %edx # mods->mod_end - mods->mod_start |
146 | movl %edx, 8(%edi) |
146 | movl %edx, 8(%edi) |
147 | 147 | ||
148 | addl $16, %esi |
148 | addl $16, %esi |
149 | addl $8 , %edi |
149 | addl $8 , %edi |
150 | 150 | ||
151 | loop mods_loop |
151 | loop mods_loop |
152 | 152 | ||
153 | mods_end: |
153 | mods_end: |
154 | 154 | ||
155 | bt $6, %eax # mbi->flags[6] (mmap_length, mmap_addr valid) |
155 | bt $6, %eax # mbi->flags[6] (mmap_length, mmap_addr valid) |
156 | jc mmap_valid |
156 | jc mmap_valid |
157 | 157 | ||
158 | xorl %edx, %edx |
158 | xorl %edx, %edx |
159 | jmp mmap_invalid |
159 | jmp mmap_invalid |
160 | 160 | ||
161 | mmap_valid: |
161 | mmap_valid: |
162 | movl 44(%ebx), %ecx # mbi->mmap_length |
162 | movl 44(%ebx), %ecx # mbi->mmap_length |
163 | movl 48(%ebx), %esi # mbi->mmap_addr |
163 | movl 48(%ebx), %esi # mbi->mmap_addr |
164 | movl $e820table, %edi |
164 | movl $e820table, %edi |
165 | xorl %edx, %edx |
165 | xorl %edx, %edx |
166 | 166 | ||
167 | mmap_loop: |
167 | mmap_loop: |
168 | cmpl $0, %ecx |
168 | cmpl $0, %ecx |
169 | jle mmap_end |
169 | jle mmap_end |
170 | 170 | ||
171 | movl 4(%esi), %eax # mmap->base_addr_low |
171 | movl 4(%esi), %eax # mmap->base_addr_low |
172 | movl %eax, (%edi) |
172 | movl %eax, (%edi) |
173 | 173 | ||
174 | movl 8(%esi), %eax # mmap->base_addr_high |
174 | movl 8(%esi), %eax # mmap->base_addr_high |
175 | movl %eax, 4(%edi) |
175 | movl %eax, 4(%edi) |
176 | 176 | ||
177 | movl 12(%esi), %eax # mmap->length_low |
177 | movl 12(%esi), %eax # mmap->length_low |
178 | movl %eax, 8(%edi) |
178 | movl %eax, 8(%edi) |
179 | 179 | ||
180 | movl 16(%esi), %eax # mmap->length_high |
180 | movl 16(%esi), %eax # mmap->length_high |
181 | movl %eax, 12(%edi) |
181 | movl %eax, 12(%edi) |
182 | 182 | ||
183 | movl 20(%esi), %eax # mmap->type |
183 | movl 20(%esi), %eax # mmap->type |
184 | movl %eax, 16(%edi) |
184 | movl %eax, 16(%edi) |
185 | 185 | ||
186 | movl (%esi), %eax # mmap->size |
186 | movl (%esi), %eax # mmap->size |
187 | addl $0x4, %eax |
187 | addl $0x4, %eax |
188 | addl %eax, %esi |
188 | addl %eax, %esi |
189 | subl %eax, %ecx |
189 | subl %eax, %ecx |
190 | addl $MEMMAP_E820_RECORD_SIZE, %edi |
190 | addl $MEMMAP_E820_RECORD_SIZE, %edi |
191 | incl %edx |
191 | incl %edx |
192 | jmp mmap_loop |
192 | jmp mmap_loop |
193 | 193 | ||
194 | mmap_end: |
194 | mmap_end: |
195 | 195 | ||
196 | mmap_invalid: |
196 | mmap_invalid: |
197 | movl %edx, e820counter |
197 | movl %edx, e820counter |
198 | 198 | ||
199 | invalid_boot: |
199 | invalid_boot: |
200 | 200 | ||
201 | #ifdef CONFIG_SMP |
201 | #ifdef CONFIG_SMP |
202 | 202 | ||
203 | # copy AP bootstrap routines below 1 MB |
203 | # copy AP bootstrap routines below 1 MB |
204 | 204 | ||
205 | movl $BOOT_OFFSET, %esi |
205 | movl $BOOT_OFFSET, %esi |
206 | movl $AP_BOOT_OFFSET, %edi |
206 | movl $AP_BOOT_OFFSET, %edi |
207 | movl $_hardcoded_unmapped_size, %ecx |
207 | movl $_hardcoded_unmapped_size, %ecx |
208 | cld |
208 | cld |
209 | rep movsb |
209 | rep movsb |
210 | 210 | ||
211 | #endif |
211 | #endif |
212 | 212 | ||
213 | call main_bsp # never returns |
213 | call main_bsp # never returns |
214 | 214 | ||
215 | cli |
215 | cli |
216 | hlt |
216 | hlt |
217 | 217 | ||
218 | .global map_kernel |
218 | .global map_kernel |
219 | map_kernel: |
219 | map_kernel: |
220 | # |
220 | # |
221 | # Here we setup mapping for both the unmapped and mapped sections of the kernel. |
221 | # Here we setup mapping for both the unmapped and mapped sections of the kernel. |
222 | # For simplicity, we map the entire 4G space. |
222 | # For simplicity, we map the entire 4G space. |
223 | # |
223 | # |
224 | movl %cr4, %ecx |
224 | movl %cr4, %ecx |
225 | orl $(1<<4), %ecx |
225 | orl $(1<<4), %ecx |
226 | movl %ecx, %cr4 # turn PSE on |
226 | movl %ecx, %cr4 # turn PSE on |
227 | 227 | ||
228 | movl $(page_directory+0), %esi |
228 | movl $(page_directory+0), %esi |
229 | movl $(page_directory+2048), %edi |
229 | movl $(page_directory+2048), %edi |
230 | xorl %ecx, %ecx |
230 | xorl %ecx, %ecx |
231 | xorl %ebx, %ebx |
231 | xorl %ebx, %ebx |
232 | 0: |
232 | 0: |
233 | movl $((1<<7)|(1<<0)), %eax |
233 | movl $((1<<7)|(1<<0)), %eax |
234 | orl %ebx, %eax |
234 | orl %ebx, %eax |
235 | movl %eax, (%esi,%ecx,4) # mapping 0x00000000+%ecx*4M => 0x00000000+%ecx*4M |
235 | movl %eax, (%esi,%ecx,4) # mapping 0x00000000+%ecx*4M => 0x00000000+%ecx*4M |
236 | movl %eax, (%edi,%ecx,4) # mapping 0x80000000+%ecx*4M => 0x00000000+%ecx*4M |
236 | movl %eax, (%edi,%ecx,4) # mapping 0x80000000+%ecx*4M => 0x00000000+%ecx*4M |
237 | addl $(4*1024*1024), %ebx |
237 | addl $(4*1024*1024), %ebx |
238 | 238 | ||
239 | incl %ecx |
239 | incl %ecx |
240 | cmpl $512, %ecx |
240 | cmpl $512, %ecx |
241 | jl 0b |
241 | jl 0b |
242 | 242 | ||
243 | movl %esi, %cr3 |
243 | movl %esi, %cr3 |
244 | 244 | ||
245 | # turn paging on |
245 | # turn paging on |
246 | movl %cr0, %ebx |
246 | movl %cr0, %ebx |
247 | orl $(1<<31), %ebx |
247 | orl $(1<<31), %ebx |
248 | movl %ebx, %cr0 |
248 | movl %ebx, %cr0 |
249 | ret |
249 | ret |
250 | 250 | ||
251 | #ifdef CONFIG_FB |
251 | #ifdef CONFIG_FB |
252 | vesa_init: |
252 | vesa_init: |
253 | jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init |
253 | jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init |
254 | 254 | ||
255 | .code16 |
255 | .code16 |
256 | vesa_init_real: |
256 | vesa_init_real: |
257 | 257 | ||
258 | mov %cr0, %eax |
258 | mov %cr0, %eax |
259 | and $~1, %eax |
259 | and $~1, %eax |
260 | mov %eax, %cr0 |
260 | mov %eax, %cr0 |
261 | 261 | ||
262 | jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init |
262 | jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init |
263 | 263 | ||
264 | vesa_init_real2: |
264 | vesa_init_real2: |
265 | 265 | ||
266 | mov $VESA_INIT_SEGMENT, %bx |
266 | mov $VESA_INIT_SEGMENT, %bx |
267 | 267 | ||
268 | mov %bx, %es |
268 | mov %bx, %es |
269 | mov %bx, %fs |
269 | mov %bx, %fs |
270 | mov %bx, %gs |
270 | mov %bx, %gs |
271 | mov %bx, %ds |
271 | mov %bx, %ds |
272 | mov %bx, %ss |
272 | mov %bx, %ss |
273 | 273 | ||
274 | movl %esp, %eax |
274 | movl %esp, %eax |
275 | movl $0x0000fffc, %esp |
275 | movl $0x0000fffc, %esp |
276 | movl $0x0000fffc, %ebp |
276 | movl $0x0000fffc, %ebp |
277 | pushl %eax |
277 | pushl %eax |
278 | 278 | ||
279 | #define VESA_INFO_SIZE 1024 |
279 | #define VESA_INFO_SIZE 1024 |
280 | 280 | ||
281 | #define VESA_MODE_LIST_PTR_OFFSET 14 |
281 | #define VESA_MODE_LIST_PTR_OFFSET 14 |
282 | #define VESA_MODE_WIDTH_OFFSET 18 |
282 | #define VESA_MODE_WIDTH_OFFSET 18 |
283 | #define VESA_MODE_HEIGHT_OFFSET 20 |
283 | #define VESA_MODE_HEIGHT_OFFSET 20 |
284 | #define VESA_MODE_BPP_OFFSET 25 |
284 | #define VESA_MODE_BPP_OFFSET 25 |
285 | #define VESA_MODE_SCANLINE_OFFSET 16 |
285 | #define VESA_MODE_SCANLINE_OFFSET 16 |
286 | #define VESA_MODE_PHADDR_OFFSET 40 |
286 | #define VESA_MODE_PHADDR_OFFSET 40 |
287 | 287 | ||
288 | #define VESA_END_OF_MODES 0xffff |
288 | #define VESA_END_OF_MODES 0xffff |
289 | 289 | ||
290 | #define VESA_OK 0x4f |
290 | #define VESA_OK 0x4f |
291 | 291 | ||
292 | #define VESA_GET_INFO 0x4f00 |
292 | #define VESA_GET_INFO 0x4f00 |
293 | #define VESA_GET_MODE_INFO 0x4f01 |
293 | #define VESA_GET_MODE_INFO 0x4f01 |
294 | #define VESA_SET_MODE 0x4f02 |
294 | #define VESA_SET_MODE 0x4f02 |
295 | 295 | ||
296 | #define CONFIG_VESA_BPP_a 255 |
296 | #define CONFIG_VESA_BPP_a 255 |
297 | 297 | ||
298 | #if CONFIG_VESA_BPP == 24 |
298 | #if CONFIG_VESA_BPP == 24 |
299 | #undef CONFIG_VESA_BPP_a |
299 | #undef CONFIG_VESA_BPP_a |
300 | #define CONFIG_VESA_BPP_a 32 |
300 | #define CONFIG_VESA_BPP_a 32 |
301 | #endif |
301 | #endif |
302 | 302 | ||
303 | mov $VESA_GET_INFO, %ax |
303 | mov $VESA_GET_INFO, %ax |
304 | mov $e_vesa_init - vesa_init, %di |
304 | mov $e_vesa_init - vesa_init, %di |
305 | push %di |
305 | push %di |
306 | int $0x10 |
306 | int $0x10 |
307 | 307 | ||
308 | pop %di |
308 | pop %di |
309 | cmp $VESA_OK, %al |
309 | cmp $VESA_OK, %al |
310 | jnz 0f |
310 | jnz 0f |
311 | 311 | ||
312 | mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si |
312 | mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si |
313 | mov %si, %gs |
313 | mov %si, %gs |
314 | mov VESA_MODE_LIST_PTR_OFFSET(%di), %si |
314 | mov VESA_MODE_LIST_PTR_OFFSET(%di), %si |
315 | 315 | ||
316 | add $VESA_INFO_SIZE, %di |
316 | add $VESA_INFO_SIZE, %di |
317 | 317 | ||
318 | 1:# Try next mode |
318 | 1:# Try next mode |
319 | mov %gs:(%si), %cx |
319 | mov %gs:(%si), %cx |
320 | cmp $VESA_END_OF_MODES, %cx |
320 | cmp $VESA_END_OF_MODES, %cx |
321 | jz 0f |
321 | jz 0f |
322 | 322 | ||
323 | inc %si |
323 | inc %si |
324 | inc %si |
324 | inc %si |
325 | push %cx |
325 | push %cx |
326 | push %di |
326 | push %di |
327 | push %si |
327 | push %si |
328 | mov $VESA_GET_MODE_INFO, %ax |
328 | mov $VESA_GET_MODE_INFO, %ax |
329 | int $0x10 |
329 | int $0x10 |
330 | 330 | ||
331 | pop %si |
331 | pop %si |
332 | pop %di |
332 | pop %di |
333 | pop %cx |
333 | pop %cx |
334 | cmp $VESA_OK, %al |
334 | cmp $VESA_OK, %al |
335 | jnz 0f |
335 | jnz 0f |
336 | 336 | ||
337 | mov $CONFIG_VESA_WIDTH, %ax |
337 | mov $CONFIG_VESA_WIDTH, %ax |
338 | cmp VESA_MODE_WIDTH_OFFSET(%di), %ax |
338 | cmp VESA_MODE_WIDTH_OFFSET(%di), %ax |
339 | jnz 1b |
339 | jnz 1b |
340 | 340 | ||
341 | mov $CONFIG_VESA_HEIGHT,%ax |
341 | mov $CONFIG_VESA_HEIGHT,%ax |
342 | cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax |
342 | cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax |
343 | jnz 1b |
343 | jnz 1b |
344 | 344 | ||
345 | mov $CONFIG_VESA_BPP, %al |
345 | mov $CONFIG_VESA_BPP, %al |
346 | cmp VESA_MODE_BPP_OFFSET(%di), %al |
346 | cmp VESA_MODE_BPP_OFFSET(%di), %al |
347 | jz 2f |
347 | jz 2f |
348 | 348 | ||
349 | mov $CONFIG_VESA_BPP_a, %al |
349 | mov $CONFIG_VESA_BPP_a, %al |
350 | cmp VESA_MODE_BPP_OFFSET(%di), %al |
350 | cmp VESA_MODE_BPP_OFFSET(%di), %al |
351 | jnz 1b |
351 | jnz 1b |
352 | 352 | ||
353 | 2: |
353 | 2: |
354 | 354 | ||
355 | mov %cx, %bx |
355 | mov %cx, %bx |
356 | or $0xc000, %bx |
356 | or $0xc000, %bx |
357 | push %di |
357 | push %di |
358 | mov $VESA_SET_MODE, %ax |
358 | mov $VESA_SET_MODE, %ax |
359 | int $0x10 |
359 | int $0x10 |
360 | 360 | ||
361 | pop %di |
361 | pop %di |
362 | cmp $VESA_OK, %al |
362 | cmp $VESA_OK, %al |
363 | jnz 0f |
363 | jnz 0f |
364 | 364 | ||
365 | mov VESA_MODE_PHADDR_OFFSET(%di), %esi |
365 | mov VESA_MODE_PHADDR_OFFSET(%di), %esi |
366 | mov VESA_MODE_WIDTH_OFFSET(%di), %ax |
366 | mov VESA_MODE_WIDTH_OFFSET(%di), %ax |
367 | shl $16, %eax |
367 | shl $16, %eax |
368 | mov VESA_MODE_HEIGHT_OFFSET(%di), %ax |
368 | mov VESA_MODE_HEIGHT_OFFSET(%di), %ax |
369 | mov VESA_MODE_BPP_OFFSET(%di), %bl |
369 | mov VESA_MODE_BPP_OFFSET(%di), %bl |
370 | xor %bh, %bh |
370 | xor %bh, %bh |
371 | shl $16, %ebx |
371 | shl $16, %ebx |
372 | mov VESA_MODE_SCANLINE_OFFSET(%di), %bx |
372 | mov VESA_MODE_SCANLINE_OFFSET(%di), %bx |
373 | mov %eax, %edi |
373 | mov %eax, %edi |
374 | 374 | ||
375 | 8: |
375 | 8: |
376 | 376 | ||
377 | mov %cr0, %eax |
377 | mov %cr0, %eax |
378 | or $1, %eax |
378 | or $1, %eax |
379 | mov %eax, %cr0 |
379 | mov %eax, %cr0 |
380 | 380 | ||
381 | jmp 9f |
381 | jmp 9f |
382 | 9: |
382 | 9: |
383 | 383 | ||
384 | ljmpl $selector(KTEXT_DES), $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4) |
384 | ljmpl $selector(KTEXT_DES), $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4) |
385 | 385 | ||
386 | 0:# No prefered mode found |
386 | 0:# No prefered mode found |
387 | mov $0x111, %cx |
387 | mov $0x111, %cx |
388 | push %di |
388 | push %di |
389 | push %cx |
389 | push %cx |
390 | mov $VESA_GET_MODE_INFO, %ax |
390 | mov $VESA_GET_MODE_INFO, %ax |
391 | int $0x10 |
391 | int $0x10 |
392 | 392 | ||
393 | pop %cx |
393 | pop %cx |
394 | pop %di |
394 | pop %di |
395 | cmp $VESA_OK, %al |
395 | cmp $VESA_OK, %al |
396 | jnz 1f |
396 | jnz 1f |
397 | jz 2b # Force relative jump |
397 | jz 2b # Force relative jump |
398 | 398 | ||
399 | 1: |
399 | 1: |
400 | mov $0x0003, %ax |
400 | mov $0x0003, %ax |
401 | int $0x10 |
401 | int $0x10 |
402 | mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA |
402 | mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA |
403 | xor %ax, %ax |
403 | xor %ax, %ax |
404 | jz 8b # Force relative jump |
404 | jz 8b # Force relative jump |
405 | 405 | ||
406 | 406 | ||
407 | .code32 |
407 | .code32 |
408 | vesa_init_protect: |
408 | vesa_init_protect: |
409 | popl %esp |
409 | popl %esp |
410 | 410 | ||
411 | movw $selector(KDATA_DES), %cx |
411 | movw $selector(KDATA_DES), %cx |
412 | movw %cx, %es |
412 | movw %cx, %es |
413 | movw %cx, %fs |
413 | movw %cx, %fs |
414 | movw %cx, %gs |
414 | movw %cx, %gs |
415 | movw %cx, %ds # kernel data + stack |
415 | movw %cx, %ds # kernel data + stack |
416 | movw %cx, %ss |
416 | movw %cx, %ss |
417 | 417 | ||
418 | jmpl $selector(KTEXT_DES), $vesa_meeting_point |
418 | jmpl $selector(KTEXT_DES), $vesa_meeting_point |
419 | 419 | ||
420 | .align 4 |
420 | .align 4 |
421 | e_vesa_init: |
421 | e_vesa_init: |
422 | #endif |
422 | #endif |
423 | 423 | ||
424 | .section K_DATA_START, "aw", @progbits |
424 | .section K_DATA_START, "aw", @progbits |
425 | 425 | ||
426 | .align 4096 |
426 | .align 4096 |
427 | page_directory: |
427 | page_directory: |
428 | .space 4096, 0 |
428 | .space 4096, 0 |
429 | 429 |