Changeset 0356274 in mainline for kernel/arch/xen32/src/boot/boot.S
- Timestamp:
- 2006-07-17T23:07:09Z (19 years ago)
- Branches:
- lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
- Children:
- f476e76
- Parents:
- 983cd374
- File:
-
- 1 edited
-
kernel/arch/xen32/src/boot/boot.S (modified) (3 diffs)
Legend:
- Unmodified
- Added
- Removed
-
kernel/arch/xen32/src/boot/boot.S
r983cd374 r0356274 40 40 .byte 0 41 41 42 .section K_TEXT_START, "ax" 43 44 KTEXT=8 45 KDATA=16 42 .text 46 43 47 44 .code32 … … 50 47 51 48 kernel_image_start: 52 lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register53 54 movw $KDATA, %cx55 movw %cx, %es56 movw %cx, %fs57 movw %cx, %gs58 movw %cx, %ds # kernel data + stack59 movw %cx, %ss60 61 jmpl $KTEXT, $multiboot_meeting_point62 multiboot_meeting_point:63 64 pushl %ebx # save parameters from GRUB65 pushl %eax66 67 #ifdef CONFIG_FB68 mov $vesa_init, %esi69 mov $VESA_INIT_SEGMENT << 4, %edi70 mov $e_vesa_init - vesa_init, %ecx71 49 cld 72 rep movsb 73 74 mov $VESA_INIT_SEGMENT << 4, %edi 75 jmpl %edi 76 77 vesa_meeting_point: 78 79 mov %esi, KA2PA(vesa_ph_addr) 80 mov %di, KA2PA(vesa_height) 81 shr $16, %edi 82 mov %di, KA2PA(vesa_width) 83 mov %bx, KA2PA(vesa_scanline) 84 shr $16, %ebx 85 mov %bx, KA2PA(vesa_bpp) 86 #endif 87 88 call map_kernel # map kernel and turn paging on 89 90 popl %eax 91 popl %ebx 50 movl $kernel_stack, %esp # initialize stack pointer 92 51 93 52 call main_bsp # never returns … … 96 55 hlt 97 56 98 .global map_kernel 99 map_kernel: 100 # 101 # Here we setup mapping for both the unmapped and mapped sections of the kernel. 102 # For simplicity, we map the entire 4G space. 103 # 104 movl %cr4, %ecx 105 orl $(1<<4), %ecx 106 movl %ecx, %cr4 # turn PSE on 107 108 movl $(page_directory+0), %esi 109 movl $(page_directory+2048), %edi 110 xorl %ecx, %ecx 111 xorl %ebx, %ebx 112 0: 113 movl $((1<<7)|(1<<0)), %eax 114 orl %ebx, %eax 115 movl %eax, (%esi,%ecx,4) # mapping 0x00000000+%ecx*4M => 0x00000000+%ecx*4M 116 movl %eax, (%edi,%ecx,4) # mapping 0x80000000+%ecx*4M => 0x00000000+%ecx*4M 117 addl $(4*1024*1024), %ebx 118 119 incl %ecx 120 cmpl $512, %ecx 121 jl 0b 122 123 movl %esi, %cr3 124 125 # turn paging on 126 movl %cr0, %ebx 127 orl $(1<<31), %ebx 128 movl %ebx, %cr0 129 ret 130 131 #ifdef CONFIG_FB 132 vesa_init: 133 jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init 134 135 .code16 136 vesa_init_real: 137 138 mov %cr0, %eax 139 and $~1, %eax 140 mov %eax, %cr0 141 142 jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init 143 144 vesa_init_real2: 145 146 mov $VESA_INIT_SEGMENT, %bx 147 148 mov %bx, %es 149 mov %bx, %fs 150 mov %bx, %gs 151 mov %bx, %ds 152 mov %bx, %ss 153 154 movl %esp, %eax 155 movl $0x0000fffc, %esp 156 movl $0x0000fffc, %ebp 157 pushl %eax 158 159 #define VESA_INFO_SIZE 1024 160 161 #define VESA_MODE_LIST_PTR_OFFSET 14 162 #define VESA_MODE_WIDTH_OFFSET 18 163 #define VESA_MODE_HEIGHT_OFFSET 20 164 #define VESA_MODE_BPP_OFFSET 25 165 #define VESA_MODE_SCANLINE_OFFSET 16 166 #define VESA_MODE_PHADDR_OFFSET 40 167 168 #define VESA_END_OF_MODES 0xffff 169 170 #define VESA_OK 0x4f 171 172 #define VESA_GET_INFO 0x4f00 173 #define VESA_GET_MODE_INFO 0x4f01 174 #define VESA_SET_MODE 0x4f02 175 176 #define CONFIG_VESA_BPP_a 255 177 178 #if CONFIG_VESA_BPP == 24 179 #undef CONFIG_VESA_BPP_a 180 #define CONFIG_VESA_BPP_a 32 181 #endif 182 183 mov $VESA_GET_INFO, %ax 184 mov $e_vesa_init - vesa_init, %di 185 push %di 186 int $0x10 187 188 pop %di 189 cmp $VESA_OK, %al 190 jnz 0f 191 192 mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si 193 mov %si, %gs 194 mov VESA_MODE_LIST_PTR_OFFSET(%di), %si 195 196 add $VESA_INFO_SIZE, %di 197 198 1:# Try next mode 199 mov %gs:(%si), %cx 200 cmp $VESA_END_OF_MODES, %cx 201 jz 0f 202 203 inc %si 204 inc %si 205 push %cx 206 push %di 207 push %si 208 mov $VESA_GET_MODE_INFO, %ax 209 int $0x10 210 211 pop %si 212 pop %di 213 pop %cx 214 cmp $VESA_OK, %al 215 jnz 0f 216 217 mov $CONFIG_VESA_WIDTH, %ax 218 cmp VESA_MODE_WIDTH_OFFSET(%di), %ax 219 jnz 1b 220 221 mov $CONFIG_VESA_HEIGHT,%ax 222 cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax 223 jnz 1b 224 225 mov $CONFIG_VESA_BPP, %al 226 cmp VESA_MODE_BPP_OFFSET(%di), %al 227 jz 2f 228 229 mov $CONFIG_VESA_BPP_a, %al 230 cmp VESA_MODE_BPP_OFFSET(%di), %al 231 jnz 1b 232 233 2: 234 235 mov %cx, %bx 236 or $0xc000, %bx 237 push %di 238 mov $VESA_SET_MODE, %ax 239 int $0x10 240 241 pop %di 242 cmp $VESA_OK, %al 243 jnz 0f 244 245 mov VESA_MODE_PHADDR_OFFSET(%di), %esi 246 mov VESA_MODE_WIDTH_OFFSET(%di), %ax 247 shl $16, %eax 248 mov VESA_MODE_HEIGHT_OFFSET(%di), %ax 249 mov VESA_MODE_BPP_OFFSET(%di), %bl 250 xor %bh, %bh 251 shl $16, %ebx 252 mov VESA_MODE_SCANLINE_OFFSET(%di), %bx 253 mov %eax, %edi 254 255 8: 256 257 mov %cr0, %eax 258 or $1, %eax 259 mov %eax, %cr0 260 261 jmp 9f 262 9: 263 264 ljmpl $KTEXT, $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4) 265 266 0:# No prefered mode found 267 mov $0x111, %cx 268 push %di 269 push %cx 270 mov $VESA_GET_MODE_INFO, %ax 271 int $0x10 272 273 pop %cx 274 pop %di 275 cmp $VESA_OK, %al 276 jnz 1f 277 jz 2b # Force relative jump 278 279 1: 280 mov $0x0003, %ax 281 int $0x10 282 mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA 283 xor %ax, %ax 284 jz 8b # Force relative jump 285 286 287 .code32 288 vesa_init_protect: 289 popl %esp 290 291 movw $KDATA, %cx 292 movw %cx, %es 293 movw %cx, %fs 294 movw %cx, %gs 295 movw %cx, %ds # kernel data + stack 296 movw %cx, %ss 297 298 jmpl $KTEXT, $vesa_meeting_point 299 300 .align 4 301 e_vesa_init: 302 #endif 303 304 .section K_DATA_START, "aw", @progbits 57 .data 305 58 306 59 .align 4096 307 60 page_directory: 308 61 .space 4096, 0 62 63 kernel_stack_bottom: 64 .space TEMP_STACK_SIZE 65 kernel_stack:
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