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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 | #ifdef CONFIG_FB |
72 | #ifdef CONFIG_FB |
73 | mov $vesa_init,%esi; |
73 | mov $vesa_init,%esi; |
74 | mov $VESA_INIT_SEGMENT<<4,%edi; |
74 | mov $VESA_INIT_SEGMENT<<4,%edi; |
75 | mov $e_vesa_init-vesa_init,%ecx; |
75 | mov $e_vesa_init-vesa_init,%ecx; |
76 | cld; |
76 | cld; |
77 | rep movsb; |
77 | rep movsb; |
78 | 78 | ||
79 | mov $VESA_INIT_SEGMENT<<4,%edi; |
79 | mov $VESA_INIT_SEGMENT<<4,%edi; |
80 | call *%edi; |
80 | call *%edi; |
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 | .code16 |
254 | .code16 |
255 | vesa_init_real: |
255 | vesa_init_real: |
256 | 256 | ||
257 | mov %cr0,%eax; |
257 | mov %cr0,%eax; |
258 | and $~1,%eax; |
258 | and $~1,%eax; |
259 | mov %eax,%cr0; |
259 | mov %eax,%cr0; |
260 | 260 | ||
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 | 266 | ||
267 | mov %esp,%ebp; |
267 | mov %esp,%ebp; |
268 | mov %ss,%cx; |
268 | mov %ss,%cx; |
269 | mov $VESA_INIT_SEGMENT,%bx; |
269 | mov $VESA_INIT_SEGMENT,%bx; |
270 | mov %bx,%ss; |
270 | mov %bx,%ss; |
271 | mov $0x0000fffc,%esp; |
271 | mov $0x0000fffc,%esp; |
272 | push %ds; |
272 | push %ds; |
273 | push %es; |
273 | push %es; |
274 | push %fs; |
274 | push %fs; |
275 | push %gs; |
275 | push %gs; |
276 | push %ebp; |
276 | push %ebp; |
277 | push %cx; |
277 | push %cx; |
278 | 278 | ||
279 | mov %bx,%ds; |
279 | mov %bx,%ds; |
280 | mov %bx,%es; |
280 | mov %bx,%es; |
281 | mov %bx,%fs; |
281 | mov %bx,%fs; |
282 | mov %bx,%gs; |
282 | mov %bx,%gs; |
283 | 283 | ||
284 | 284 | ||
285 | mov $vesa_idt-vesa_init,%ebx; |
285 | mov $vesa_idt-vesa_init,%ebx; |
286 | lidtl (%ebx); |
286 | lidtl (%ebx); |
287 | 287 | ||
288 | #define VESA_INFO_SIZE 1024 |
288 | #define VESA_INFO_SIZE 1024 |
289 | 289 | ||
290 | #define VESA_MODE_LIST_PTR_OFFSET 14 |
290 | #define VESA_MODE_LIST_PTR_OFFSET 14 |
291 | #define VESA_MODE_WIDTH_OFFSET 18 |
291 | #define VESA_MODE_WIDTH_OFFSET 18 |
292 | #define VESA_MODE_HEIGHT_OFFSET 20 |
292 | #define VESA_MODE_HEIGHT_OFFSET 20 |
293 | #define VESA_MODE_BPP_OFFSET 25 |
293 | #define VESA_MODE_BPP_OFFSET 25 |
294 | #define VESA_MODE_SCANLINE_OFFSET 16 |
294 | #define VESA_MODE_SCANLINE_OFFSET 16 |
295 | #define VESA_MODE_PHADDR_OFFSET 40 |
295 | #define VESA_MODE_PHADDR_OFFSET 40 |
296 | 296 | ||
297 | #define VESA_END_OF_MODES 0xffff |
297 | #define VESA_END_OF_MODES 0xffff |
298 | 298 | ||
299 | #define VESA_OK 0x4f |
299 | #define VESA_OK 0x4f |
300 | 300 | ||
301 | #define VESA_GET_INFO 0x4f00 |
301 | #define VESA_GET_INFO 0x4f00 |
302 | #define VESA_GET_MODE_INFO 0x4f01 |
302 | #define VESA_GET_MODE_INFO 0x4f01 |
303 | #define VESA_SET_MODE 0x4f02 |
303 | #define VESA_SET_MODE 0x4f02 |
304 | 304 | ||
305 | #define CONFIG_VESA_BPP_a 255 |
305 | #define CONFIG_VESA_BPP_a 255 |
306 | 306 | ||
307 | #if CONFIG_VESA_BPP==24 |
307 | #if CONFIG_VESA_BPP==24 |
308 | #undef CONFIG_VESA_BPP_a |
308 | #undef CONFIG_VESA_BPP_a |
309 | #define CONFIG_VESA_BPP_a 32 |
309 | #define CONFIG_VESA_BPP_a 32 |
310 | #endif |
310 | #endif |
311 | 311 | ||
312 | 312 | ||
313 | mov $VESA_GET_INFO,%ax; |
313 | mov $VESA_GET_INFO,%ax; |
314 | mov $e_vesa_init-vesa_init,%di |
314 | mov $e_vesa_init-vesa_init,%di |
315 | push %di; |
315 | push %di; |
316 | int $0x10; |
316 | int $0x10; |
317 | pop %di; |
317 | pop %di; |
318 | cmp $VESA_OK,%al; |
318 | cmp $VESA_OK,%al; |
319 | jnz 0f; |
319 | jnz 0f; |
320 | mov 2+VESA_MODE_LIST_PTR_OFFSET(%di),%si; |
320 | mov 2+VESA_MODE_LIST_PTR_OFFSET(%di),%si; |
321 | mov %si,%gs; |
321 | mov %si,%gs; |
322 | mov VESA_MODE_LIST_PTR_OFFSET(%di),%si; |
322 | mov VESA_MODE_LIST_PTR_OFFSET(%di),%si; |
323 | 323 | ||
324 | add $VESA_INFO_SIZE,%di; |
324 | add $VESA_INFO_SIZE,%di; |
325 | 325 | ||
326 | 1:# Try next mode |
326 | 1:# Try next mode |
327 | mov %gs:(%si),%cx; |
327 | mov %gs:(%si),%cx; |
328 | cmp $VESA_END_OF_MODES,%cx; |
328 | cmp $VESA_END_OF_MODES,%cx; |
329 | jz 0f; |
329 | jz 0f; |
330 | inc %si; |
330 | inc %si; |
331 | inc %si; |
331 | inc %si; |
332 | push %cx; |
332 | push %cx; |
333 | push %di; |
333 | push %di; |
334 | push %si; |
334 | push %si; |
335 | mov $VESA_GET_MODE_INFO,%ax; |
335 | mov $VESA_GET_MODE_INFO,%ax; |
336 | int $0x10; |
336 | int $0x10; |
337 | pop %si; |
337 | pop %si; |
338 | pop %di; |
338 | pop %di; |
339 | pop %cx; |
339 | pop %cx; |
340 | cmp $VESA_OK,%al; |
340 | cmp $VESA_OK,%al; |
341 | jnz 0f; |
341 | jnz 0f; |
342 | 342 | ||
343 | 343 | ||
344 | mov $CONFIG_VESA_WIDTH,%ax; |
344 | mov $CONFIG_VESA_WIDTH,%ax; |
345 | cmp VESA_MODE_WIDTH_OFFSET(%di),%ax; |
345 | cmp VESA_MODE_WIDTH_OFFSET(%di),%ax; |
346 | jnz 1b; |
346 | jnz 1b; |
347 | mov $CONFIG_VESA_HEIGHT,%ax; |
347 | mov $CONFIG_VESA_HEIGHT,%ax; |
348 | cmp VESA_MODE_HEIGHT_OFFSET(%di),%ax; |
348 | cmp VESA_MODE_HEIGHT_OFFSET(%di),%ax; |
349 | jnz 1b; |
349 | jnz 1b; |
350 | mov $CONFIG_VESA_BPP,%al; |
350 | mov $CONFIG_VESA_BPP,%al; |
351 | cmp VESA_MODE_BPP_OFFSET(%di),%al; |
351 | cmp VESA_MODE_BPP_OFFSET(%di),%al; |
352 | jz 2f; |
352 | jz 2f; |
353 | mov $CONFIG_VESA_BPP_a,%al; |
353 | mov $CONFIG_VESA_BPP_a,%al; |
354 | cmp VESA_MODE_BPP_OFFSET(%di),%al; |
354 | cmp VESA_MODE_BPP_OFFSET(%di),%al; |
355 | jnz 1b; |
355 | jnz 1b; |
356 | 356 | ||
357 | 2: |
357 | 2: |
358 | 358 | ||
359 | mov %cx,%bx; |
359 | mov %cx,%bx; |
360 | or $0xC000,%bx; |
360 | or $0xC000,%bx; |
361 | push %di; |
361 | push %di; |
362 | mov $VESA_SET_MODE,%ax; |
362 | mov $VESA_SET_MODE,%ax; |
363 | int $0x10; |
363 | int $0x10; |
364 | pop %di; |
364 | pop %di; |
365 | cmp $VESA_OK,%al; |
365 | cmp $VESA_OK,%al; |
366 | jnz 0f; |
366 | jnz 0f; |
367 | 367 | ||
368 | mov VESA_MODE_PHADDR_OFFSET(%di),%esi; |
368 | mov VESA_MODE_PHADDR_OFFSET(%di),%esi; |
369 | mov VESA_MODE_WIDTH_OFFSET(%di),%ax; |
369 | mov VESA_MODE_WIDTH_OFFSET(%di),%ax; |
370 | shl $16,%eax; |
370 | shl $16,%eax; |
371 | mov VESA_MODE_HEIGHT_OFFSET(%di),%ax; |
371 | mov VESA_MODE_HEIGHT_OFFSET(%di),%ax; |
372 | mov VESA_MODE_BPP_OFFSET(%di),%bl; |
372 | mov VESA_MODE_BPP_OFFSET(%di),%bl; |
373 | xor %bh,%bh; |
373 | xor %bh,%bh; |
374 | shl $16,%ebx; |
374 | shl $16,%ebx; |
375 | mov VESA_MODE_SCANLINE_OFFSET(%di),%bx; |
375 | mov VESA_MODE_SCANLINE_OFFSET(%di),%bx; |
376 | mov %eax,%edi; |
376 | mov %eax,%edi; |
377 | 377 | ||
378 | 378 | ||
379 | 379 | ||
380 | 8: |
380 | 8: |
381 | 381 | ||
382 | mov %cr0,%eax; |
382 | mov %cr0,%eax; |
383 | or $1,%eax; |
383 | or $1,%eax; |
384 | mov %eax,%cr0; |
384 | mov %eax,%cr0; |
385 | 385 | ||
386 | jmp 9f; |
386 | jmp 9f; |
387 | 9: |
387 | 9: |
388 | 388 | ||
389 | pop %cx; |
389 | pop %cx; |
390 | pop %ebp; |
390 | pop %ebp; |
391 | pop %gs; |
391 | pop %gs; |
392 | pop %fs; |
392 | pop %fs; |
393 | pop %es; |
393 | pop %es; |
394 | pop %ds; |
394 | pop %ds; |
395 | mov %cx,%ss; |
395 | mov %cx,%ss; |
396 | mov %ebp,%esp; |
396 | mov %ebp,%esp; |
397 | 397 | ||
398 | ljmpl $KTEXT,$(vesa_init_protect-vesa_init+VESA_INIT_SEGMENT<<4); |
398 | ljmpl $KTEXT,$(vesa_init_protect-vesa_init+VESA_INIT_SEGMENT<<4); |
399 | 399 | ||
400 | vesa_init_protect: |
- | |
401 | .code32 |
- | |
402 | ret; |
- | |
403 | 400 | ||
404 | 0: #Error no Prefered mode found |
401 | 0: #Error no Prefered mode found |
405 | - | ||
406 | mov $0x111,%cx; |
402 | mov $0x111,%cx; |
407 | push %di; |
403 | push %di; |
408 | push %cx; |
404 | push %cx; |
409 | mov $VESA_GET_MODE_INFO,%ax; |
405 | mov $VESA_GET_MODE_INFO,%ax; |
410 | int $0x10; |
406 | int $0x10; |
411 | pop %cx; |
407 | pop %cx; |
412 | pop %di; |
408 | pop %di; |
413 | cmp $VESA_OK,%al; |
409 | cmp $VESA_OK,%al; |
414 | jnz 1f; |
410 | jnz 1f; |
415 | jmp 2b; |
411 | jz 2b; /* Force relative jump */ |
416 | 412 | ||
417 | 1:mov $0x0003,%ax; |
413 | 1:mov $0x0003,%ax; |
418 | int $0x10; |
414 | int $0x10; |
419 | mov $0xffffffff,%edi; /* EGA text mode used, because of problems with VESA */ |
415 | mov $0xffffffff,%edi; /* EGA text mode used, because of problems with VESA */ |
420 | jmp 8; |
416 | xor %ax,%ax |
- | 417 | jz 8b; /* Force relative jump */ |
|
421 | 418 | ||
- | 419 | vesa_init_protect: |
|
- | 420 | .code32 |
|
- | 421 | ret; |
|
422 | 422 | ||
423 | vesa_idt: |
423 | vesa_idt: |
424 | .word 0x03ff |
424 | .word 0x03ff |
425 | .long 0 |
425 | .long 0 |
426 | .align 4 |
426 | .align 4 |
427 | e_vesa_init: |
427 | e_vesa_init: |
428 | #endif |
428 | #endif |
429 | 429 | ||
430 | .section K_DATA_START, "aw", @progbits |
430 | .section K_DATA_START, "aw", @progbits |
431 | 431 | ||
432 | .align 4096 |
432 | .align 4096 |
433 | page_directory: |
433 | page_directory: |
434 | .space 4096, 0 |
434 | .space 4096, 0 |
435 | 435 |