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>
#include <arch/cpu.h>
#include <arch/cpuid.h>
#include <arch/boot/boot.h>
 
 
#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.
#
 
#define START_STACK (BOOTSTRAP_OFFSET-0x400)
	
.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 $(AMD_CPUID_EXTENDED), %eax # Extended function code 80000001
	cpuid
	bt $29, %edx 		# Test if long mode is supported.
	jnc no_long_mode
 
	# Load gdtr, idtr
	lgdt bsp_bootstrap_gdtr
	
	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
 
	movb $0xd1, %al		# enable A20 using the keyboard controller
	outb %al, $0x64
	movb $0xdf, %al
	outb %al, $0x60
 
	
	# 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 $EFER_MSR_NUM, %ecx   # EFER MSR number
	rdmsr                   # Read EFER
	btsl $AMD_LME_FLAG, %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 $(PA2KA(START_STACK)), %rsp
 
	# Copy kernel to higher physical memory
	movq $BOOTSTRAP_OFFSET, %rsi
	movq $BOOTSTRAP_OFFSET + BOOT_OFFSET, %rdi
	movq $_hardcoded_kernel_size, %rcx
	cld
	rep movsb
	
	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				
bsp_bootstrap_gdtr:
	.word gdtselector(GDT_ITEMS)
	.long KA2PA(gdt)-BOOT_OFFSET
 
.global ap_bootstrap_gdtr
ap_bootstrap_gdtr:
	.word gdtselector(GDT_ITEMS)
 
	.long KA2PA(gdt)-BOOT_OFFSET
 
 
 
 
 

Rev 273	Rev 275
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	#include <arch/cpu.h>	34	#include <arch/cpu.h>
-		35	#include <arch/cpuid.h>
-		36	#include <arch/boot/boot.h>
35		37
36	#define START_STACK 0x7c00	-
37	#define START_STACK_64 0xffffffff80007c00	38	#define START_STACK_64 0xffffffff80007c00
38		39
39	#	40	#
40	# This is where we require any SPARTAN-kernel-compatible boot loader	41	# This is where we require any SPARTAN-kernel-compatible boot loader
41	# to pass control in real mode.	42	# to pass control in real mode.
42	#	43	#
43	# Protected mode tables are statically initialised during compile	44	# Protected mode tables are statically initialised during compile
44	# time. So we can just load the respective table registers and	45	# time. So we can just load the respective table registers and
45	# switch to protected mode.	46	# switch to protected mode.
46	#	47	#
-		48
-		49	#define START_STACK (BOOTSTRAP_OFFSET-0x400)
-		50
47	.section K_TEXT_START	51	.section K_TEXT_START
48	.code16	52	.code16
49	.global kernel_image_start	53	.global kernel_image_start
50	kernel_image_start:	54	kernel_image_start:
51	cli	55	cli
52	xorw %ax,%ax	56	xorw %ax,%ax
53	movw %ax,%ds	57	movw %ax,%ds
54	movw %ax,%ss # initialize stack segment register	58	movw %ax,%ss # initialize stack segment register
55	movl $(START_STACK),%esp # initialize stack pointer	59	movl $(START_STACK), %esp # initialize stack pointer
56		60
57	call memmap_arch_init	61	call memmap_arch_init
58		62
59	movl $0x80000000, %eax	63	movl $0x80000000, %eax
60	cpuid	64	cpuid
61	cmp $0x80000000, %eax # any function > 80000000h?	65	cmp $0x80000000, %eax # any function > 80000000h?
62	jbe no_long_mode	66	jbe no_long_mode
63	movl $0x80000001, %eax # Extended function code 80000001	67	movl $(AMD_CPUID_EXTENDED), %eax # Extended function code 80000001
64	cpuid	68	cpuid
65	bt $29, %edx # Test if long mode is supported.	69	bt $29, %edx # Test if long mode is supported.
66	jnc no_long_mode	70	jnc no_long_mode
67		71
68	# Load gdtr, idtr	72	# Load gdtr, idtr
69	lgdt bsp_bootstrap_gdtr	73	lgdt bsp_bootstrap_gdtr
70		74
71	movl %cr0,%eax	75	movl %cr0,%eax
72	orl $0x1,%eax	76	orl $0x1,%eax
73	movl %eax,%cr0 # switch to protected mode	77	movl %eax,%cr0 # switch to protected mode
74		78
75	jmpl $gdtselector(KTEXT32_DES), $now_in_prot	79	jmpl $gdtselector(KTEXT32_DES), $now_in_prot
76		80
77	no_long_mode:	81	no_long_mode:
78	1:	82	1:
79	jmp 1b	83	jmp 1b
80		84
81	# Protected 16-bit. We want to reuse the code-seg descriptor,	85	# Protected 16-bit. We want to reuse the code-seg descriptor,
82	# the Default operand size must not be 1 when entering long mode	86	# the Default operand size must not be 1 when entering long mode
83	now_in_prot:	87	now_in_prot:
84	# Set up stack & data descriptors	88	# Set up stack & data descriptors
85	movw $gdtselector(KDATA_DES), %ax	89	movw $gdtselector(KDATA_DES), %ax
86	movw %ax, %ds	90	movw %ax, %ds
87	movw %ax, %fs	91	movw %ax, %fs
88	movw %ax, %gs	92	movw %ax, %gs
89	movw %ax, %ss	93	movw %ax, %ss
90		94
-		95	movb $0xd1, %al # enable A20 using the keyboard controller
-		96	outb %al, $0x64
-		97	movb $0xdf, %al
-		98	outb %al, $0x60
-		99
-		100
91	# Enable 64-bit page transaltion entries - CR4.PAE = 1.	101	# Enable 64-bit page transaltion entries - CR4.PAE = 1.
92	# Paging is not enabled until after long mode is enabled	102	# Paging is not enabled until after long mode is enabled
93	movl %cr4, %eax	103	movl %cr4, %eax
94	btsl $5, %eax	104	btsl $5, %eax
95	movl %eax, %cr4	105	movl %eax, %cr4
96		106
97	# Set up paging tables	107	# Set up paging tables
98	leal ptl_0, %eax	108	leal ptl_0, %eax
99	movl %eax, %cr3	109	movl %eax, %cr3
100		110
101	# Enable long mode	111	# Enable long mode
102	movl $EFER_MSR_NUM, %ecx # EFER MSR number	112	movl $EFER_MSR_NUM, %ecx # EFER MSR number
103	rdmsr # Read EFER	113	rdmsr # Read EFER
104	btsl $AMD_LME_FLAG, %eax # Set LME=1	114	btsl $AMD_LME_FLAG, %eax # Set LME=1
105	wrmsr # Write EFER	115	wrmsr # Write EFER
106		116
107	# Enable paging to activate long mode (set CR0.PG=1)	117	# Enable paging to activate long mode (set CR0.PG=1)
108	movl %cr0, %eax	118	movl %cr0, %eax
109	btsl $31, %eax	119	btsl $31, %eax
110	movl %eax, %cr0	120	movl %eax, %cr0
111		121
112	# At this point we are in compatibility mode	122	# At this point we are in compatibility mode
113	jmpl $gdtselector(KTEXT_DES), $start64	123	jmpl $gdtselector(KTEXT_DES), $start64
114		124
115	.code64	125	.code64
116	start64:	126	start64:
117	movq $(START_STACK_64), %rsp	127	movq $(PA2KA(START_STACK)), %rsp
-		128
-		129	# Copy kernel to higher physical memory
-		130	movq $BOOTSTRAP_OFFSET, %rsi
-		131	movq $BOOTSTRAP_OFFSET + BOOT_OFFSET, %rdi
-		132	movq $_hardcoded_kernel_size, %rcx
-		133	cld
-		134	rep movsb
118		135
119	call main_bsp # never returns	136	call main_bsp # never returns
120	1:	137	1:
121	jmp 1b	138	jmp 1b
122		139
123	.section K_DATA_START	140	.section K_DATA_START
124	.align 4096	141	.align 4096
125		142
126	# Identical mapping of first 16MB and the same of -2GB -> 0	143	# Identical mapping of first 16MB and the same of -2GB -> 0
127	.global ptl_2	144	.global ptl_2
128	ptl_2:	145	ptl_2:
129	.quad 0x0 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	146	.quad 0x0 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
130	.quad 0x200000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	147	.quad 0x200000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
131	.quad 0x400000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	148	.quad 0x400000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
132	.quad 0x600000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	149	.quad 0x600000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
133	.quad 0x800000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	150	.quad 0x800000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
134	.quad 0xa00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	151	.quad 0xa00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
135	.quad 0xc00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	152	.quad 0xc00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
136	.quad 0xe00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	153	.quad 0xe00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
137		154
138	.align 4096	155	.align 4096
139	.global ptl_1	156	.global ptl_1
140	ptl_1:	157	ptl_1:
141	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)	158	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)
142	.fill 509,8,0	159	.fill 509,8,0
143	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)	160	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)
144	.fill 2,8,0	161	.fill 2,8,0
145		162
146	.align 4096	163	.align 4096
147	.global ptl_0	164	.global ptl_0
148	ptl_0:	165	ptl_0:
149	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)	166	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)
150	.fill 510,8,0	167	.fill 510,8,0
151	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)	168	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)
152		169
153	.global gdtr_inst	170	.global gdtr_inst
154	bsp_bootstrap_gdtr:	171	bsp_bootstrap_gdtr:
155	.word gdtselector(GDT_ITEMS)	172	.word gdtselector(GDT_ITEMS)
156	.long KA2PA(gdt)	173	.long KA2PA(gdt)-BOOT_OFFSET
157		174
158	.global ap_bootstrap_gdtr	175	.global ap_bootstrap_gdtr
159	ap_bootstrap_gdtr:	176	ap_bootstrap_gdtr:
160	.word gdtselector(GDT_ITEMS)	177	.word gdtselector(GDT_ITEMS)
161	.long KA2PA(gdt)	-
162		178	.long KA2PA(gdt)-BOOT_OFFSET
-		179
163	Generated by GNU Enscript 1.6.6.	-
164		-
165		-
166		-

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/amd64/src/boot/boot.S @ 2071 – Rev 273 → 275