WebSVN – HelenOS – Diff – /trunk/kernel/arch/amd64/src/boot/boot.S


#
# Copyright (C) 2001-2004 Ondrej Palkovsky
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
# - The name of the author may not be used to endorse or promote products
#   derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
 
#define __ASM__
 
#include <arch/mm/page.h>	
#include <arch/mm/ptl.h>
#include <arch/pm.h>
 
#define START_STACK     0x7c00	
#define START_STACK_64  $0xffffffff80007c00
					
#
# This is where we require any SPARTAN-kernel-compatible boot loader
# to pass control in real mode.
#
# Protected mode tables are statically initialised during compile
# time. So we can just load the respective table registers and
# switch to protected mode.
#
.section K_TEXT_START
.code16
.global kernel_image_start
kernel_image_start:
	cli
	xorw %ax,%ax
	movw %ax,%ds
	movw %ax,%ss            # initialize stack segment register
	movl START_STACK,%esp	# initialize stack pointer
	
#	call memmap_arch_init
	
	movl $0x80000000, %eax  
	cpuid
	cmp $0x80000000, %eax 	# any function > 80000000h?
	jbe no_long_mode
	movl $0x80000001, %eax	# Extended function code 80000001
	cpuid
	bt $29, %edx 		# Test if long mode is supported.
	jnc no_long_mode
 
	# Load gdtr, idtr
	lgdt gdtr_inst
	lidt idtr_inst
	
	movl %cr0,%eax
	orl $0x1,%eax
	movl %eax,%cr0			# switch to protected mode
 
	jmpl $selector(KTEXT32_DES), $now_in_prot
 
no_long_mode:
1:
	jmp 1b
 
# Protected 16-bit. We want to reuse the code-seg descriptor,
# the Default operand size must not be 1 when entering long mode	
now_in_prot:  
	# Set up stack & data descriptors
	movw $selector(KDATA_DES), %ax
	movw %ax, %ds
	movw %ax, %fs
	movw %ax, %gs
	movw %ax, %ss
 
	# Enable 64-bit page transaltion entries - CR4.PAE = 1.
	# Paging is not enabled until after long mode is enabled
	movl %cr4, %eax
	btsl $5, %eax
	movl %eax, %cr4
 
	# Set up paging tables
	leal ptl_0, %eax
	movl %eax, %cr3
		
	# Enable long mode
	movl $0xc0000080, %ecx   # EFER MSR number
	rdmsr                   # Read EFER
	btsl $8, %eax            # Set LME=1
	wrmsr                   # Write EFER
	
	# Enable paging to activate long mode (set CR0.PG=1)
	movl %cr0, %eax
	btsl $31, %eax
	movl %eax, %cr0
	
	# At this point we are in compatibility mode
	jmpl $selector(KTEXT_DES), $start64
 
.code64
start64:
	movq START_STACK_64, %rsp
	
	lidt idtr_inst
	
	call main_bsp   # never returns
1:
	jmp 1b
			
 
.section K_DATA_START
.align 4096
.global ptl_2
ptl_2:	
	.quad 0x0 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
	.quad 0x200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
	.quad 0x400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
	.quad 0x600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
	.quad 0x800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
	.quad 0xa00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
	.quad 0xc00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
	.quad 0xe00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
	
.align 4096
.global ptl_1
ptl_1:
	.quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT)
	.fill 509,8,0
	.quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT)
	.fill 2,8,0
	
.align 4096
.global ptl_0
ptl_0:
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
	.fill 510,8,0
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
 
.global gdtr_inst				
gdtr_inst:
	.word selector(GDT_ITEMS)
	.long KA2PA(gdt)
 
.global idtr_inst
idtr_inst:
	.word 0
	.long KA2PA(idt)
 

Rev 188	Rev 194
1	#	1	#
2	# Copyright (C) 2001-2004 Jakub Jermar	2	# Copyright (C) 2001-2004 Ondrej Palkovsky
3	# All rights reserved.	3	# All rights reserved.
4	#	4	#
5	# Redistribution and use in source and binary forms, with or without	5	# Redistribution and use in source and binary forms, with or without
6	# modification, are permitted provided that the following conditions	6	# modification, are permitted provided that the following conditions
7	# are met:	7	# are met:
8	#	8	#
9	# - Redistributions of source code must retain the above copyright	9	# - Redistributions of source code must retain the above copyright
10	# notice, this list of conditions and the following disclaimer.	10	# notice, this list of conditions and the following disclaimer.
11	# - Redistributions in binary form must reproduce the above copyright	11	# - Redistributions in binary form must reproduce the above copyright
12	# notice, this list of conditions and the following disclaimer in the	12	# notice, this list of conditions and the following disclaimer in the
13	# documentation and/or other materials provided with the distribution.	13	# documentation and/or other materials provided with the distribution.
14	# - The name of the author may not be used to endorse or promote products	14	# - The name of the author may not be used to endorse or promote products
15	# derived from this software without specific prior written permission.	15	# derived from this software without specific prior written permission.
16	#	16	#
17	# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	#	27	#
28		28
-		29	#define __ASM__
-		30
-		31	#include <arch/mm/page.h>
29	#include <arch/mm/ptl.h>	32	#include <arch/mm/ptl.h>
-		33	#include <arch/pm.h>
30		34
31	#define START_STACK 0x7c00	35	#define START_STACK 0x7c00
32	#define START_STACK_64 $0xffffffff80007c00	36	#define START_STACK_64 $0xffffffff80007c00
33		37
34	#	38	#
35	# This is where we require any SPARTAN-kernel-compatible boot loader	39	# This is where we require any SPARTAN-kernel-compatible boot loader
36	# to pass control in real mode.	40	# to pass control in real mode.
37	#	41	#
38	# Protected mode tables are statically initialised during compile	42	# Protected mode tables are statically initialised during compile
39	# time. So we can just load the respective table registers and	43	# time. So we can just load the respective table registers and
40	# switch to protected mode.	44	# switch to protected mode.
41	#	45	#
42	.section K_TEXT_START	46	.section K_TEXT_START
43	.code16	47	.code16
44	.global kernel_image_start	48	.global kernel_image_start
45	kernel_image_start:	49	kernel_image_start:
46	cli	50	cli
47	xorw %ax,%ax	51	xorw %ax,%ax
48	movw %ax,%ds	52	movw %ax,%ds
49	movw %ax,%ss # initialize stack segment register	53	movw %ax,%ss # initialize stack segment register
50	movl START_STACK,%esp # initialize stack pointer	54	movl START_STACK,%esp # initialize stack pointer
51		55
52	# call memmap_arch_init	56	# call memmap_arch_init
53		57
54	mov $0x80000000, %eax	58	movl $0x80000000, %eax
55	cpuid	59	cpuid
56	cmp $0x80000000, %eax # any function > 80000000h?	60	cmp $0x80000000, %eax # any function > 80000000h?
57	jbe no_long_mode	61	jbe no_long_mode
58	mov $0x80000001, %eax # Extended function code 80000001	62	movl $0x80000001, %eax # Extended function code 80000001
59	cpuid	63	cpuid
60	bt $29, %edx # Test if long mode is supported.	64	bt $29, %edx # Test if long mode is supported.
61	jnc no_long_mode	65	jnc no_long_mode
62		66
63	# Load gdtr, idtr	67	# Load gdtr, idtr
64	lgdt gdtr_inst	68	lgdt gdtr_inst
65	lidt idtr_inst	69	lidt idtr_inst
66		70
67	movl %cr0,%eax	71	movl %cr0,%eax
68	orl $0x1,%eax	72	orl $0x1,%eax
69	movl %eax,%cr0 # switch to protected mode	73	movl %eax,%cr0 # switch to protected mode
70		74
71	jmpl $40, $now_in_prot	75	jmpl $selector(KTEXT32_DES), $now_in_prot
72		76
73	no_long_mode:	77	no_long_mode:
74	1:	78	1:
75	jmp 1b	79	jmp 1b
76		80
77	# Protected 16-bit. We want to reuse the code-seg descriptor,	81	# Protected 16-bit. We want to reuse the code-seg descriptor,
78	# the Default operand size must not be 1 when entering long mode	82	# the Default operand size must not be 1 when entering long mode
79	now_in_prot:	83	now_in_prot:
80	# Set up stack & data descriptors	84	# Set up stack & data descriptors
81	movw $16, %ax	85	movw $selector(KDATA_DES), %ax
82	movw %ax, %ds	86	movw %ax, %ds
83	movw %ax, %fs	87	movw %ax, %fs
84	movw %ax, %gs	88	movw %ax, %gs
85	movw %ax, %ss	89	movw %ax, %ss
86		90
87	# Enable 64-bit page transaltion entries - CR4.PAE = 1.	91	# Enable 64-bit page transaltion entries - CR4.PAE = 1.
88	# Paging is not enabled until after long mode is enabled	92	# Paging is not enabled until after long mode is enabled
89	movl %cr4, %eax	93	movl %cr4, %eax
90	btsl $5, %eax	94	btsl $5, %eax
91	movl %eax, %cr4	95	movl %eax, %cr4
92		96
93	# Set up paging tables	97	# Set up paging tables
94	leal ptl_0, %eax	98	leal ptl_0, %eax
95	movl %eax, %cr3	99	movl %eax, %cr3
96		100
97	# Enable long mode	101	# Enable long mode
98	movl $0xc0000080, %ecx # EFER MSR number	102	movl $0xc0000080, %ecx # EFER MSR number
99	rdmsr # Read EFER	103	rdmsr # Read EFER
100	btsl $8, %eax # Set LME=1	104	btsl $8, %eax # Set LME=1
101	wrmsr # Write EFER	105	wrmsr # Write EFER
102		106
103	# Enable paging to activate long mode (set CR0.PG=1)	107	# Enable paging to activate long mode (set CR0.PG=1)
104	movl %cr0, %eax	108	movl %cr0, %eax
105	btsl $31, %eax	109	btsl $31, %eax
106	movl %eax, %cr0	110	movl %eax, %cr0
107		111
108	# At this point we are in compatibility mode	112	# At this point we are in compatibility mode
109	jmpl $8, $start64	113	jmpl $selector(KTEXT_DES), $start64
110		114
111	.code64	115	.code64
112	start64:	116	start64:
113	movq START_STACK_64, %rsp	117	movq START_STACK_64, %rsp
114		118
115	lidt idtr_inst	119	lidt idtr_inst
116		120
117	call main_bsp # never returns	121	call main_bsp # never returns
118	1:	122	1:
119	jmp 1b	123	jmp 1b
120		124
121		125
122	.section K_DATA_START	126	.section K_DATA_START
123	.align 4096	127	.align 4096
124	.global ptl_2	128	.global ptl_2
125	ptl_2:	129	ptl_2:
126	.quad 0x0 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	130	.quad 0x0 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
127	.quad 0x200000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	131	.quad 0x200000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
128	.quad 0x400000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	132	.quad 0x400000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
129	.quad 0x600000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	133	.quad 0x600000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
130	.quad 0x800000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	134	.quad 0x800000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
131	.quad 0xa00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	135	.quad 0xa00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
132	.quad 0xc00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	136	.quad 0xc00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
133	.quad 0xe00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	137	.quad 0xe00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
134		138
135	.align 4096	139	.align 4096
136	.global ptl_1	140	.global ptl_1
137	ptl_1:	141	ptl_1:
138	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)	142	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)
139	.fill 509,8,0	143	.fill 509,8,0
140	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)	144	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)
141	.fill 2,8,0	145	.fill 2,8,0
142		146
143	.align 4096	147	.align 4096
144	.global ptl_0	148	.global ptl_0
145	ptl_0:	149	ptl_0:
146	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)	150	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)
147	.fill 510,8,0	151	.fill 510,8,0
148	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)	152	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)
149		153
150	.global gdtr_inst	154	.global gdtr_inst
151	gdtr_inst:	155	gdtr_inst:
152	.word 78 # GDT_ITEMS 8	156	.word selector(GDT_ITEMS)
153	.long gdt + 0x80000000	157	.long KA2PA(gdt)
154		158
155	.global idtr_inst	159	.global idtr_inst
156	idtr_inst:	160	idtr_inst:
157	.word 0	161	.word 0
158	.long idt + 0x80000000	162	.long KA2PA(idt)
159		163

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(root)/trunk/kernel/arch/amd64/src/boot/boot.S @ 2071 – Rev 188 → 194