Lines Matching +full:linear +full:- +full:mapping +full:- +full:mode

1 /*-
5  * Copyright (c) 2008-2012 Jung-uk Kim <jkim@FreeBSD.org>
38  * Resume entry point for real mode.
40  * If XFirmwareWakingVector is zero and FirmwareWakingVector is non-zero
41  * in FACS, the BIOS enters here in real mode after POST with CS set to
44  * of the system (i.e., S3 suspend-to-RAM vs. S4 suspend-to-disk).
46  * Note: If XFirmwareWakingVector is non-zero, it should disable address
49  * this mode is not supported by this code.
58 	 * Set up segment registers for real mode, a small stack for
71 	testb	$~0, resume_beep - wakeup_start
73 	movb	$0, resume_beep - wakeup_start
91 	/* Re-initialize video BIOS if the reset_video tunable is set. */
92 	testb	$~0, reset_video - wakeup_start
94 	movb	$0, reset_video - wakeup_start
102 	/* Re-start in case the previous BIOS call clobbers them. */
115 	 * in 16-bit protected mode.
117 	lgdtl	bootgdtdesc - wakeup_start
119 	/* Enable protected mode */
124 	 * Now execute a far jump to turn on protected mode.  This
129 	 * ljmpl $bootcode32 - bootgdt, $wakeup_32 - wakeup_start
136 	.long	wakeup_32 - wakeup_start /* offset in segment */
137 	.word	bootcode32 - bootgdt	/* index in gdt for 32 bit code */
140 	 * At this point, we are running in 32 bit legacy protected mode.
146 	mov	$bootdata32 - bootgdt, %eax
155 	leal	wakeup_pagetables - wakeup_start(%ebx), %ecx
163 	 * Enable EFER.LME so that we get long mode when all the prereqs are
169 	movl	wakeup_efer - wakeup_start(%ebx), %eax
170 	movl	wakeup_efer + 4 - wakeup_start(%ebx), %edx
175 	 * only gets accessed after we're actually in 64 bit mode, however
181 	leal	wakeup_pagetables - wakeup_start(%ebx), %eax
187 	 * Finally, switch to long bit mode by enabling paging.  We have
199 	 * At this point paging is enabled, and we are in "compatibility" mode.
201 	 * %cr3 points to a 4-level page table page.
203 	 * specify a 32 bit linear address.  So, yet another trampoline.
206 	 * ljmp $bootcode64 - bootgdt, $wakeup_64 - wakeup_start
212 	.long	wakeup_64 - wakeup_start /* offset in segment */
213 	.word	bootcode64 - bootgdt	/* index in gdt for 64 bit code */
216 	 * Yeehar!  We're running in 64-bit mode!  We can mostly ignore our
219 	 * a 1:1 1GB mirrored mapping over entire address space.  We had better
227 	mov	$bootdata64 - bootgdt, %eax
231 	movq	wakeup_pcb - wakeup_start(%rbx), %rdi
232 	movq	wakeup_ret - wakeup_start(%rbx), %rax
235 	lgdt	wakeup_gdt - wakeup_start(%rbx)
279 	.word	bootgdtend - bootgdt	/* Length */
280 	.long	bootgdt - wakeup_start	/* Offset plus %ds << 4 */