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Rev 2089 Rev 2220
Line 64... Line 64...
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 
	xorl %eax, %eax
- 
 
 70 
 	cpuid
- 
 
 71 
 	cmp $0x0, %eax						# any function > 0?
- 
 
 72 
	jbe pse_unsupported
- 
 
 73 
	movl $0x1, %eax						# Basic function code 80000001
- 
 
 74 
	cpuid
- 
 
 75 
	bt $3, %edx							# Test if PSE is supported
- 
 
 76 
	jc pse_supported
- 
 
 77 
 
- 
 
 78 
	pse_unsupported:
- 
 
 79 
		movl $pse_msg, %esi
- 
 
 80 
		jmp error_halt
- 
 
 81
- 
 
 82 
	pse_supported:
- 
 
 83
69 
#ifdef CONFIG_FB
 84 
#ifdef CONFIG_FB
70 
	mov $vesa_init, %esi
 85 
	mov $vesa_init, %esi
71 
	mov $VESA_INIT_SEGMENT << 4, %edi
 86 
	mov $VESA_INIT_SEGMENT << 4, %edi
72 
	mov $e_vesa_init - vesa_init, %ecx
 87 
	mov $e_vesa_init - vesa_init, %ecx
73 
	cld
 88 
	cld
Line 207... Line 222...
207 
	movl $_hardcoded_unmapped_size, %ecx
 222 
	movl $_hardcoded_unmapped_size, %ecx
208 
	cld
 223 
	cld
209 
	rep movsb
 224 
	rep movsb
210
225
211 
#endif
 226 
#endif
212
227 
 
213 
	call main_bsp								# never returns
 228 
	call main_bsp								# never returns
214 
 
 229 
 
215 
	cli
 230 
	cli
216 
	hlt
 231 
	hlt
217 
 
 232 
 
Line 220... Line 235...
220 
	#
 235 
	#
221 
	# Here we setup mapping for both the unmapped and mapped sections of the kernel.
 236 
	# Here we setup mapping for both the unmapped and mapped sections of the kernel.
222 
	# For simplicity, we map the entire 4G space.
 237 
	# For simplicity, we map the entire 4G space.
223 
	#
 238 
	#
224 
	movl %cr4, %ecx
 239 
	movl %cr4, %ecx
225 
	orl $(1<<4), %ecx
 240 
	orl $(1 << 4), %ecx							# turn PSE on
226 
	movl %ecx, %cr4							# turn PSE on
 241 
	andl $(~(1 << 5)), %ecx						# turn PAE off
- 
 
 242 
	movl %ecx, %cr4
227
243
228 
	movl $(page_directory+0), %esi
 244 
	movl $(page_directory + 0), %esi
229 
	movl $(page_directory+2048), %edi
 245 
	movl $(page_directory + 2048), %edi
230 
	xorl %ecx, %ecx
 246 
	xorl %ecx, %ecx
231 
	xorl %ebx, %ebx
 247 
	xorl %ebx, %ebx
232 
0:
 248 
0:
233 
	movl $((1<<7)|(1<<0)), %eax
 249 
	movl $((1 << 7) | (1 << 1) | (1 << 0)), %eax
234 
	orl %ebx, %eax
 250 
	orl %ebx, %eax
235 
	movl %eax, (%esi,%ecx,4)					# mapping 0x00000000+%ecx*4M => 0x00000000+%ecx*4M
 251 
	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
 252 
	movl %eax, (%edi, %ecx, 4)					# mapping 0x80000000 + %ecx * 4M => 0x00000000 + %ecx * 4M
237 
	addl $(4*1024*1024), %ebx
 253 
	addl $(4 * 1024 * 1024), %ebx
238 
 
 254 
 
239 
	incl %ecx
 255 
	incl %ecx
240 
	cmpl $512, %ecx
 256 
	cmpl $512, %ecx
241 
	jl 0b
 257 
	jl 0b
242 
 
 258 
 
243 
	movl %esi, %cr3
 259 
	movl %esi, %cr3
244
260
245 
	# turn paging on
 - 
 
246 
	movl %cr0, %ebx
 261 
	movl %cr0, %ebx
247 
	orl $(1<<31), %ebx
 262 
	orl $(1 << 31), %ebx						# turn paging on
248 
	movl %ebx, %cr0
 263 
	movl %ebx, %cr0
249 
	ret
 264 
	ret
250 
 
 265 
 
- 
 
 266 
# Print string from %esi to EGA display (in red) and halt
- 
 
 267 
error_halt:
- 
 
 268 
	movl $0xb8000, %edi						# base of EGA text mode memory
- 
 
 269 
	xorl %eax, %eax
- 
 
 270
- 
 
 271 
	movw $0x3d4, %dx						# read bits 8 - 15 of the cursor address
- 
 
 272 
	movb $0xe, %al
- 
 
 273 
	outb %al, %dx
- 
 
 274
- 
 
 275 
	movw $0x3d5, %dx
- 
 
 276 
	inb %dx, %al
- 
 
 277 
	shl $8, %ax
- 
 
 278
- 
 
 279 
	movw $0x3d4, %dx						# read bits 0 - 7 of the cursor address
- 
 
 280 
	movb $0xf, %al
- 
 
 281 
	outb %al, %dx
- 
 
 282
- 
 
 283 
	movw $0x3d5, %dx
- 
 
 284 
	inb %dx, %al
- 
 
 285
- 
 
 286 
	cmp $1920, %ax
- 
 
 287 
	jbe cursor_ok
- 
 
 288 
		movw $1920, %ax						# sanity check for the cursor on the last line
- 
 
 289 
	cursor_ok:
- 
 
 290
- 
 
 291 
	movw %ax, %bx
- 
 
 292 
	shl $1, %eax
- 
 
 293 
	addl %eax, %edi
- 
 
 294
- 
 
 295 
	movw $0x0c00, %ax						# black background, light red foreground
- 
 
 296 
	cld
- 
 
 297
- 
 
 298 
	ploop:
- 
 
 299 
		lodsb
- 
 
 300 
		cmp $0, %al
- 
 
 301 
		je ploop_end
- 
 
 302 
		stosw
- 
 
 303 
		inc %bx
- 
 
 304 
		jmp ploop
- 
 
 305 
	ploop_end:
- 
 
 306
- 
 
 307 
	movw $0x3d4, %dx						# write bits 8 - 15 of the cursor address
- 
 
 308 
	movb $0xe, %al
- 
 
 309 
	outb %al, %dx
- 
 
 310
- 
 
 311 
	movw $0x3d5, %dx
- 
 
 312 
	movb %bh, %al
- 
 
 313 
	outb %al, %dx
- 
 
 314
- 
 
 315 
	movw $0x3d4, %dx						# write bits 0 - 7 of the cursor address
- 
 
 316 
	movb $0xf, %al
- 
 
 317 
	outb %al, %dx
- 
 
 318
- 
 
 319 
	movw $0x3d5, %dx
- 
 
 320 
	movb %bl, %al
- 
 
 321 
	outb %al, %dx
- 
 
 322
- 
 
 323 
	cli
- 
 
 324 
	hlt
- 
 
 325 
 
251 
#ifdef CONFIG_FB
 326 
#ifdef CONFIG_FB
252 
vesa_init:
 327 
vesa_init:
253 
	jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init
 328 
	jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init
254
329
255 
.code16
 330 
.code16
Line 424... Line 499...
424 
.section K_DATA_START, "aw", @progbits
 499 
.section K_DATA_START, "aw", @progbits
425 
 
 500 
 
426 
.align 4096
 501 
.align 4096
427 
page_directory:
 502 
page_directory:
428 
	.space 4096, 0
 503 
	.space 4096, 0
- 
 
 504 
 
- 
 
 505 
pse_msg:
- 
 
 506 
	.ascii "Page Size Extension not supported. System halted.\0"