WebSVN – HelenOS-historic – Diff – /kernel/trunk/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>
 
#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 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
 
	# 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 $(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				
bsp_bootstrap_gdtr:
	.word gdtselector(GDT_ITEMS)
	.long KA2PA(gdt)
 
.global ap_bootstrap_gdtr
ap_bootstrap_gdtr:
	.word gdtselector(GDT_ITEMS)
	.long KA2PA(gdt)
 
Generated by GNU Enscript 1.6.6.
 
 
 

Rev 251	Rev 273
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		35
36	#define START_STACK 0x7c00	36	#define START_STACK 0x7c00
37	#define START_STACK_64 0xffffffff80007c00	37	#define START_STACK_64 0xffffffff80007c00
38		38
39	#	39	#
40	# This is where we require any SPARTAN-kernel-compatible boot loader	40	# This is where we require any SPARTAN-kernel-compatible boot loader
41	# to pass control in real mode.	41	# to pass control in real mode.
42	#	42	#
43	# Protected mode tables are statically initialised during compile	43	# Protected mode tables are statically initialised during compile
44	# time. So we can just load the respective table registers and	44	# time. So we can just load the respective table registers and
45	# switch to protected mode.	45	# switch to protected mode.
46	#	46	#
47	.section K_TEXT_START	47	.section K_TEXT_START
48	.code16	48	.code16
49	.global kernel_image_start	49	.global kernel_image_start
50	kernel_image_start:	50	kernel_image_start:
51	cli	51	cli
52	xorw %ax,%ax	52	xorw %ax,%ax
53	movw %ax,%ds	53	movw %ax,%ds
54	movw %ax,%ss # initialize stack segment register	54	movw %ax,%ss # initialize stack segment register
55	movl $(START_STACK),%esp # initialize stack pointer	55	movl $(START_STACK),%esp # initialize stack pointer
56		56
57	call memmap_arch_init	57	call memmap_arch_init
58		58
59	movl $0x80000000, %eax	59	movl $0x80000000, %eax
60	cpuid	60	cpuid
61	cmp $0x80000000, %eax # any function > 80000000h?	61	cmp $0x80000000, %eax # any function > 80000000h?
62	jbe no_long_mode	62	jbe no_long_mode
63	movl $0x80000001, %eax # Extended function code 80000001	63	movl $0x80000001, %eax # Extended function code 80000001
64	cpuid	64	cpuid
65	bt $29, %edx # Test if long mode is supported.	65	bt $29, %edx # Test if long mode is supported.
66	jnc no_long_mode	66	jnc no_long_mode
67		67
68	# Load gdtr, idtr	68	# Load gdtr, idtr
69	lgdt gdtr_inst	69	lgdt bsp_bootstrap_gdtr
70	# Load idtr, but it contains mess - we should not get interrupt	-
71	# anyway	-
72	lidt idtr_inst	-
73		70
74	movl %cr0,%eax	71	movl %cr0,%eax
75	orl $0x1,%eax	72	orl $0x1,%eax
76	movl %eax,%cr0 # switch to protected mode	73	movl %eax,%cr0 # switch to protected mode
77		74
78	jmpl $gdtselector(KTEXT32_DES), $now_in_prot	75	jmpl $gdtselector(KTEXT32_DES), $now_in_prot
79		76
80	no_long_mode:	77	no_long_mode:
81	1:	78	1:
82	jmp 1b	79	jmp 1b
83		80
84	# Protected 16-bit. We want to reuse the code-seg descriptor,	81	# Protected 16-bit. We want to reuse the code-seg descriptor,
85	# 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
86	now_in_prot:	83	now_in_prot:
87	# Set up stack & data descriptors	84	# Set up stack & data descriptors
88	movw $gdtselector(KDATA_DES), %ax	85	movw $gdtselector(KDATA_DES), %ax
89	movw %ax, %ds	86	movw %ax, %ds
90	movw %ax, %fs	87	movw %ax, %fs
91	movw %ax, %gs	88	movw %ax, %gs
92	movw %ax, %ss	89	movw %ax, %ss
93		90
94	# Enable 64-bit page transaltion entries - CR4.PAE = 1.	91	# Enable 64-bit page transaltion entries - CR4.PAE = 1.
95	# Paging is not enabled until after long mode is enabled	92	# Paging is not enabled until after long mode is enabled
96	movl %cr4, %eax	93	movl %cr4, %eax
97	btsl $5, %eax	94	btsl $5, %eax
98	movl %eax, %cr4	95	movl %eax, %cr4
99		96
100	# Set up paging tables	97	# Set up paging tables
101	leal ptl_0, %eax	98	leal ptl_0, %eax
102	movl %eax, %cr3	99	movl %eax, %cr3
103		100
104	# Enable long mode	101	# Enable long mode
105	movl $EFER_MSR_NUM, %ecx # EFER MSR number	102	movl $EFER_MSR_NUM, %ecx # EFER MSR number
106	rdmsr # Read EFER	103	rdmsr # Read EFER
107	btsl $AMD_LME_FLAG, %eax # Set LME=1	104	btsl $AMD_LME_FLAG, %eax # Set LME=1
108	wrmsr # Write EFER	105	wrmsr # Write EFER
109		106
110	# Enable paging to activate long mode (set CR0.PG=1)	107	# Enable paging to activate long mode (set CR0.PG=1)
111	movl %cr0, %eax	108	movl %cr0, %eax
112	btsl $31, %eax	109	btsl $31, %eax
113	movl %eax, %cr0	110	movl %eax, %cr0
114		111
115	# At this point we are in compatibility mode	112	# At this point we are in compatibility mode
116	jmpl $gdtselector(KTEXT_DES), $start64	113	jmpl $gdtselector(KTEXT_DES), $start64
117		114
118	.code64	115	.code64
119	start64:	116	start64:
120	movq $(START_STACK_64), %rsp	117	movq $(START_STACK_64), %rsp
121		118
122	call main_bsp # never returns	119	call main_bsp # never returns
123	1:	120	1:
124	jmp 1b	121	jmp 1b
125		122
126	.section K_DATA_START	123	.section K_DATA_START
127	.align 4096	124	.align 4096
128		125
129	# Identical mapping of first 16MB and the same of -2GB -> 0	126	# Identical mapping of first 16MB and the same of -2GB -> 0
130	.global ptl_2	127	.global ptl_2
131	ptl_2:	128	ptl_2:
132	.quad 0x0 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	129	.quad 0x0 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
133	.quad 0x200000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	130	.quad 0x200000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
134	.quad 0x400000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	131	.quad 0x400000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
135	.quad 0x600000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	132	.quad 0x600000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
136	.quad 0x800000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	133	.quad 0x800000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
137	.quad 0xa00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	134	.quad 0xa00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
138	.quad 0xc00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	135	.quad 0xc00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
139	.quad 0xe00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)	136	.quad 0xe00000 \| (PTL_WRITABLE \| PTL_PRESENT \| PTL_2MB_PAGE)
140		137
141	.align 4096	138	.align 4096
142	.global ptl_1	139	.global ptl_1
143	ptl_1:	140	ptl_1:
144	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)	141	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)
145	.fill 509,8,0	142	.fill 509,8,0
146	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)	143	.quad ptl_2 + (PTL_WRITABLE \| PTL_PRESENT)
147	.fill 2,8,0	144	.fill 2,8,0
148		145
149	.align 4096	146	.align 4096
150	.global ptl_0	147	.global ptl_0
151	ptl_0:	148	ptl_0:
152	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)	149	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)
153	.fill 510,8,0	150	.fill 510,8,0
154	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)	151	.quad ptl_1 + (PTL_WRITABLE \| PTL_PRESENT)
155		152
156	.global gdtr_inst	153	.global gdtr_inst
157	gdtr_inst:	154	bsp_bootstrap_gdtr:
158	.word gdtselector(GDT_ITEMS)	155	.word gdtselector(GDT_ITEMS)
159	.long KA2PA(gdt)	156	.long KA2PA(gdt)
160		157
161	.global idtr_inst	158	.global ap_bootstrap_gdtr
162	idtr_inst:	159	ap_bootstrap_gdtr:
163	.word idtselector(IDT_ITEMS)	160	.word gdtselector(GDT_ITEMS)
164	.long KA2PA(idt)	161	.long KA2PA(gdt)
165		162
-		163	Generated by GNU Enscript 1.6.6.
-		164
-		165
-		166

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