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
	# Load idtr, but it contains mess - we should not get interrupt
	# anyway
	lidt idtr_inst
	
	movl %cr0,%eax
	orl $0x1,%eax
	movl %eax,%cr0			# switch to protected mode
 
	jmpl $gdtselector(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 $gdtselector(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 $gdtselector(KTEXT_DES), $start64
 
.code64
start64:
	movq START_STACK_64, %rsp
	
 
 
	call main_bsp   # never returns
1:
	jmp 1b
				
 
.section K_DATA_START
.align 4096
 
# Identical mapping of first 16MB and the same of -2GB -> 0	
.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 gdtselector(GDT_ITEMS)
	.long KA2PA(gdt)
 
.global idtr_inst
idtr_inst:
	.word idtselector(IDT_ITEMS)
	.long KA2PA(idt)
 

Rev 194	Rev 206
1	#	1	#
2	# Copyright (C) 2001-2004 Ondrej Palkovsky	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__	29	#define __ASM__
30		30
31	#include <arch/mm/page.h>	31	#include <arch/mm/page.h>
32	#include <arch/mm/ptl.h>	32	#include <arch/mm/ptl.h>
33	#include <arch/pm.h>	33	#include <arch/pm.h>
34		34
35	#define START_STACK 0x7c00	35	#define START_STACK 0x7c00
36	#define START_STACK_64 $0xffffffff80007c00	36	#define START_STACK_64 $0xffffffff80007c00
37		37
38	#	38	#
39	# This is where we require any SPARTAN-kernel-compatible boot loader	39	# This is where we require any SPARTAN-kernel-compatible boot loader
40	# to pass control in real mode.	40	# to pass control in real mode.
41	#	41	#
42	# Protected mode tables are statically initialised during compile	42	# Protected mode tables are statically initialised during compile
43	# time. So we can just load the respective table registers and	43	# time. So we can just load the respective table registers and
44	# switch to protected mode.	44	# switch to protected mode.
45	#	45	#
46	.section K_TEXT_START	46	.section K_TEXT_START
47	.code16	47	.code16
48	.global kernel_image_start	48	.global kernel_image_start
49	kernel_image_start:	49	kernel_image_start:
50	cli	50	cli
51	xorw %ax,%ax	51	xorw %ax,%ax
52	movw %ax,%ds	52	movw %ax,%ds
53	movw %ax,%ss # initialize stack segment register	53	movw %ax,%ss # initialize stack segment register
54	movl START_STACK,%esp # initialize stack pointer	54	movl START_STACK,%esp # initialize stack pointer
55		55
56	# call memmap_arch_init	56	# call memmap_arch_init
57		57
58	movl $0x80000000, %eax	58	movl $0x80000000, %eax
59	cpuid	59	cpuid
60	cmp $0x80000000, %eax # any function > 80000000h?	60	cmp $0x80000000, %eax # any function > 80000000h?
61	jbe no_long_mode	61	jbe no_long_mode
62	movl $0x80000001, %eax # Extended function code 80000001	62	movl $0x80000001, %eax # Extended function code 80000001
63	cpuid	63	cpuid
64	bt $29, %edx # Test if long mode is supported.	64	bt $29, %edx # Test if long mode is supported.
65	jnc no_long_mode	65	jnc no_long_mode
66		66
67	# Load gdtr, idtr	67	# Load gdtr, idtr
68	lgdt gdtr_inst	68	lgdt gdtr_inst
-		69	# Load idtr, but it contains mess - we should not get interrupt
-		70	# anyway
69	lidt idtr_inst	71	lidt idtr_inst
70		72
71	movl %cr0,%eax	73	movl %cr0,%eax
72	orl $0x1,%eax	74	orl $0x1,%eax
73	movl %eax,%cr0 # switch to protected mode	75	movl %eax,%cr0 # switch to protected mode
74		76
75	jmpl $selector(KTEXT32_DES), $now_in_prot	77	jmpl $gdtselector(KTEXT32_DES), $now_in_prot
76		78
77	no_long_mode:	79	no_long_mode:
78	1:	80	1:
79	jmp 1b	81	jmp 1b
80		82
81	# Protected 16-bit. We want to reuse the code-seg descriptor,	83	# Protected 16-bit. We want to reuse the code-seg descriptor,
82	# the Default operand size must not be 1 when entering long mode	84	# the Default operand size must not be 1 when entering long mode
83	now_in_prot:	85	now_in_prot:
84	# Set up stack & data descriptors	86	# Set up stack & data descriptors
85	movw $selector(KDATA_DES), %ax	87	movw $gdtselector(KDATA_DES), %ax
86	movw %ax, %ds	88	movw %ax, %ds
87	movw %ax, %fs	89	movw %ax, %fs
88	movw %ax, %gs	90	movw %ax, %gs
89	movw %ax, %ss	91	movw %ax, %ss
90		92
91	# Enable 64-bit page transaltion entries - CR4.PAE = 1.	93	# Enable 64-bit page transaltion entries - CR4.PAE = 1.
92	# Paging is not enabled until after long mode is enabled	94	# Paging is not enabled until after long mode is enabled
93	movl %cr4, %eax	95	movl %cr4, %eax
94	btsl $5, %eax	96	btsl $5, %eax
95	movl %eax, %cr4	97	movl %eax, %cr4
96		98
97	# Set up paging tables	99	# Set up paging tables
98	leal ptl_0, %eax	100	leal ptl_0, %eax
99	movl %eax, %cr3	101	movl %eax, %cr3
100		102
101	# Enable long mode	103	# Enable long mode
102	movl $0xc0000080, %ecx # EFER MSR number	104	movl $0xc0000080, %ecx # EFER MSR number
103	rdmsr # Read EFER	105	rdmsr # Read EFER
104	btsl $8, %eax # Set LME=1	106	btsl $8, %eax # Set LME=1
105	wrmsr # Write EFER	107	wrmsr # Write EFER
106		108
107	# Enable paging to activate long mode (set CR0.PG=1)	109	# Enable paging to activate long mode (set CR0.PG=1)
108	movl %cr0, %eax	110	movl %cr0, %eax
109	btsl $31, %eax	111	btsl $31, %eax
110	movl %eax, %cr0	112	movl %eax, %cr0
111		113
112	# At this point we are in compatibility mode	114	# At this point we are in compatibility mode
113	jmpl $selector(KTEXT_DES), $start64	115	jmpl $gdtselector(KTEXT_DES), $start64
114		116
115	.code64	117	.code64
116	start64:	118	start64:
117	movq START_STACK_64, %rsp	119	movq START_STACK_64, %rsp
118		120
119	lidt idtr_inst	-
120		-
121	call main_bsp # never returns	121	call main_bsp # never returns
122	1:	122	1:
123	jmp 1b	123	jmp 1b
124		124
125		-
126	.section K_DATA_START	125	.section K_DATA_START
127	.align 4096	126	.align 4096
-		127
-		128	# Identical mapping of first 16MB and the same of -2GB -> 0
128	.global ptl_2	129	.global ptl_2
129	ptl_2:	130	ptl_2:
130	.quad 0x0 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	131	.quad 0x0 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
131	.quad 0x200000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	132	.quad 0x200000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
132	.quad 0x400000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	133	.quad 0x400000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
133	.quad 0x600000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	134	.quad 0x600000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
134	.quad 0x800000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	135	.quad 0x800000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
135	.quad 0xa00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	136	.quad 0xa00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
136	.quad 0xc00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	137	.quad 0xc00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
137	.quad 0xe00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	138	.quad 0xe00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
138		139
139	.align 4096	140	.align 4096
140	.global ptl_1	141	.global ptl_1
141	ptl_1:	142	ptl_1:
142	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)	143	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)
143	.fill 509,8,0	144	.fill 509,8,0
144	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)	145	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)
145	.fill 2,8,0	146	.fill 2,8,0
146		147
147	.align 4096	148	.align 4096
148	.global ptl_0	149	.global ptl_0
149	ptl_0:	150	ptl_0:
150	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)	151	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)
151	.fill 510,8,0	152	.fill 510,8,0
152	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)	153	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)
153		154
154	.global gdtr_inst	155	.global gdtr_inst
155	gdtr_inst:	156	gdtr_inst:
156	.word selector(GDT_ITEMS)	157	.word gdtselector(GDT_ITEMS)
157	.long KA2PA(gdt)	158	.long KA2PA(gdt)
158		159
159	.global idtr_inst	160	.global idtr_inst
160	idtr_inst:	161	idtr_inst:
161	.word 0	162	.word idtselector(IDT_ITEMS)
162	.long KA2PA(idt)	163	.long KA2PA(idt)
163		164

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/amd64/src/boot/boot.S @ 2071 – Rev 194 → 206