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#
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#
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# Copyright (C) 2005 Ondrej Palkovsky
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# Copyright (C) 2005 Ondrej Palkovsky
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# All rights reserved.
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# All rights reserved.
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#
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#
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# Redistribution and use in source and binary forms, with or without
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# modification, are permitted provided that the following conditions
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# are met:
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# are met:
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#
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#
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# - Redistributions of source code must retain the above copyright
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# - Redistributions of source code must retain the above copyright
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#   notice, this list of conditions and the following disclaimer.
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#   notice, this list of conditions and the following disclaimer.
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# - Redistributions in binary form must reproduce the above copyright
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# - Redistributions in binary form must reproduce the above copyright
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#   notice, this list of conditions and the following disclaimer in the
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#   notice, this list of conditions and the following disclaimer in the
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#   documentation and/or other materials provided with the distribution.
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#   documentation and/or other materials provided with the distribution.
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# - The name of the author may not be used to endorse or promote products
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# - The name of the author may not be used to endorse or promote products
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#   derived from this software without specific prior written permission.
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#   derived from this software without specific prior written permission.
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#
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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#
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#include <arch/mm/page.h>	
29
#include <arch/mm/page.h>	
30
#include <arch/mm/ptl.h>
30
#include <arch/mm/ptl.h>
31
#include <arch/pm.h>
31
#include <arch/pm.h>
32
#include <arch/cpu.h>
32
#include <arch/cpu.h>
33
#include <arch/cpuid.h>
33
#include <arch/cpuid.h>
34
#include <arch/boot/boot.h>
34
#include <arch/boot/boot.h>
35
 
35
 
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
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# 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
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# switch to protected mode.
44
# switch to protected mode.
45
#
45
#
46
 
46
 
47
#define START_STACK (BOOTSTRAP_OFFSET-0x400)
47
#define START_STACK (BOOTSTRAP_OFFSET-0x400)
48
	
48
	
49
.section K_TEXT_START, "ax"
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.section K_TEXT_START, "ax"
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.code16
50
.code16
51
.global kernel_image_start
51
.global kernel_image_start
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kernel_image_start:
52
kernel_image_start:
53
	cli
53
	cli
54
	xorw %ax,%ax
54
	xorw %ax,%ax
55
	movw %ax,%ds
55
	movw %ax,%ds
56
	movw %ax,%es
56
	movw %ax,%es
57
	movw %ax,%ss            # initialize stack segment register
57
	movw %ax,%ss            # initialize stack segment register
58
	movl $(START_STACK), %esp	# initialize stack pointer
58
	movl $(START_STACK), %esp	# initialize stack pointer
59
	
59
	
60
	call memmap_arch_init
60
	call memmap_arch_init
61
	
61
	
62
	movl $0x80000000, %eax  
62
	movl $0x80000000, %eax  
63
	cpuid
63
	cpuid
64
	cmp $0x80000000, %eax 	# any function > 80000000h?
64
	cmp $0x80000000, %eax 	# any function > 80000000h?
65
	jbe no_long_mode
65
	jbe no_long_mode
66
	movl $(AMD_CPUID_EXTENDED), %eax # Extended function code 80000001
66
	movl $(AMD_CPUID_EXTENDED), %eax # Extended function code 80000001
67
	cpuid
67
	cpuid
68
	bt $29, %edx 		# Test if long mode is supported.
68
	bt $29, %edx 		# Test if long mode is supported.
69
	jnc no_long_mode
69
	jnc no_long_mode
70
 
70
 
71
	# Load gdtr, idtr
71
	# Load gdtr, idtr
72
	lgdt real_bootstrap_gdtr_boot
72
	lgdt real_bootstrap_gdtr_boot
73
	
73
	
74
	movl %cr0,%eax
74
	movl %cr0,%eax
75
	orl $0x1,%eax
75
	orl $0x1,%eax
76
	movl %eax,%cr0			# switch to protected mode
76
	movl %eax,%cr0			# switch to protected mode
77
 
77
 
78
	jmpl $gdtselector(KTEXT32_DES), $now_in_prot
78
	jmpl $gdtselector(KTEXT32_DES), $now_in_prot
79
 
79
 
80
no_long_mode:
80
no_long_mode:
81
1:
81
1:
82
	jmp 1b
82
	jmp 1b
83
 
83
	
-
 
84
.code32
-
 
85
.align 4
-
 
86
multiboot_header:
-
 
87
	.long MULTIBOOT_HEADER_MAGIC
-
 
88
	.long MULTIBOOT_HEADER_FLAGS
-
 
89
	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)	# checksum
-
 
90
	.long multiboot_header + BOOT_OFFSET
-
 
91
	.long unmapped_ktext_start + BOOT_OFFSET
-
 
92
	.long 0
-
 
93
	.long 0
-
 
94
	.long multiboot_image_start + BOOT_OFFSET
-
 
95
 
-
 
96
multiboot_image_start:
-
 
97
	movl $START_STACK, %esp				# initialize stack pointer
-
 
98
	# FIXME TODO
-
 
99
 
84
# Protected 32-bit. We want to reuse the code-seg descriptor,
100
# Protected 32-bit. We want to reuse the code-seg descriptor,
85
# the Default operand size must not be 1 when entering long mode
101
# the Default operand size must not be 1 when entering long mode
86
.code32
-
 
87
now_in_prot:  
102
now_in_prot:  
88
	# Set up stack & data descriptors
103
	# Set up stack & data descriptors
89
	movw $gdtselector(KDATA_DES), %ax
104
	movw $gdtselector(KDATA_DES), %ax
90
	movw %ax, %ds
105
	movw %ax, %ds
91
	movw %ax, %ss
106
	movw %ax, %ss
92
 
107
 
93
	movb $0xd1, %al		# enable A20 using the keyboard controller
108
	movb $0xd1, %al		# enable A20 using the keyboard controller
94
	outb %al, $0x64
109
	outb %al, $0x64
95
	movb $0xdf, %al
110
	movb $0xdf, %al
96
	outb %al, $0x60
111
	outb %al, $0x60
97
 
112
 
98
	
113
	
99
	# Enable 64-bit page transaltion entries - CR4.PAE = 1.
114
	# Enable 64-bit page transaltion entries - CR4.PAE = 1.
100
	# Paging is not enabled until after long mode is enabled
115
	# Paging is not enabled until after long mode is enabled
101
	movl %cr4, %eax
116
	movl %cr4, %eax
102
	btsl $5, %eax
117
	btsl $5, %eax
103
	movl %eax, %cr4
118
	movl %eax, %cr4
104
 
119
 
105
	# Set up paging tables
120
	# Set up paging tables
106
	leal ptl_0, %eax
121
	leal ptl_0, %eax
107
	movl %eax, %cr3
122
	movl %eax, %cr3
108
	
123
	
109
	# Enable long mode
124
	# Enable long mode
110
	movl $EFER_MSR_NUM, %ecx   # EFER MSR number
125
	movl $EFER_MSR_NUM, %ecx   # EFER MSR number
111
	rdmsr                   # Read EFER
126
	rdmsr                   # Read EFER
112
	btsl $AMD_LME_FLAG, %eax            # Set LME=1
127
	btsl $AMD_LME_FLAG, %eax            # Set LME=1
113
	wrmsr                   # Write EFER
128
	wrmsr                   # Write EFER
114
	
129
	
115
	# Enable paging to activate long mode (set CR0.PG=1)
130
	# Enable paging to activate long mode (set CR0.PG=1)
116
	movl %cr0, %eax
131
	movl %cr0, %eax
117
	btsl $31, %eax
132
	btsl $31, %eax
118
	movl %eax, %cr0
133
	movl %eax, %cr0
119
	
134
	
120
	# At this point we are in compatibility mode
135
	# At this point we are in compatibility mode
121
	jmpl $gdtselector(KTEXT_DES), $start64
136
	jmpl $gdtselector(KTEXT_DES), $start64
122
 
137
 
123
.code64
138
.code64
124
start64:
139
start64:
125
	movq $(PA2KA(START_STACK)), %rsp
140
	movq $(PA2KA(START_STACK)), %rsp
126
 
141
 
127
	# Copy kernel to higher physical memory
142
	# Copy kernel to higher physical memory
128
	movq $BOOTSTRAP_OFFSET, %rsi
143
	movq $BOOTSTRAP_OFFSET, %rsi
129
	movq $BOOTSTRAP_OFFSET + BOOT_OFFSET, %rdi
144
	movq $BOOTSTRAP_OFFSET + BOOT_OFFSET, %rdi
130
	movq $_hardcoded_kernel_size, %rcx
145
	movq $_hardcoded_kernel_size, %rcx
131
	cld
146
	cld
132
	rep movsb
147
	rep movsb
133
	
148
	
134
	call main_bsp   # never returns
149
	call main_bsp   # never returns
135
1:
150
1:
136
	jmp 1b
151
	jmp 1b
137
				
152
				
138
.section K_DATA_START, "aw", @progbits
153
.section K_DATA_START, "aw", @progbits
139
.align 4096
154
.align 4096
140
 
155
 
141
# Identical mapping of first 64MB and the same of -2GB -> 0	
156
# Identical mapping of first 64MB and the same of -2GB -> 0	
142
.global ptl_2
157
.global ptl_2
143
ptl_2:	
158
ptl_2:	
144
	.quad 0x0 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
159
	.quad 0x0 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
145
	.quad 0x200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
160
	.quad 0x200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
146
	.quad 0x400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
161
	.quad 0x400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
147
	.quad 0x600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
162
	.quad 0x600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
148
	.quad 0x800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
163
	.quad 0x800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
149
	.quad 0xa00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
164
	.quad 0xa00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
150
	.quad 0xc00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
165
	.quad 0xc00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
151
	.quad 0xe00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
166
	.quad 0xe00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
152
	.quad 0x1000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
167
	.quad 0x1000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
153
	.quad 0x1200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
168
	.quad 0x1200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
154
	.quad 0x1400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
169
	.quad 0x1400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
155
	.quad 0x1600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
170
	.quad 0x1600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
156
	.quad 0x1800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
171
	.quad 0x1800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
157
	.quad 0x1a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
172
	.quad 0x1a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
158
	.quad 0x1c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
173
	.quad 0x1c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
159
	.quad 0x1e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
174
	.quad 0x1e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
160
	.quad 0x2000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
175
	.quad 0x2000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
161
	.quad 0x2200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
176
	.quad 0x2200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
162
	.quad 0x2400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
177
	.quad 0x2400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
163
	.quad 0x2600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
178
	.quad 0x2600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
164
	.quad 0x2800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
179
	.quad 0x2800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
165
	.quad 0x2a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
180
	.quad 0x2a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
166
	.quad 0x2c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
181
	.quad 0x2c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
167
	.quad 0x2e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
182
	.quad 0x2e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
168
	.quad 0x3000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
183
	.quad 0x3000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
169
	.quad 0x3200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
184
	.quad 0x3200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
170
	.quad 0x3400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
185
	.quad 0x3400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
171
	.quad 0x3600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
186
	.quad 0x3600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
172
	.quad 0x3800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
187
	.quad 0x3800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
173
	.quad 0x3a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
188
	.quad 0x3a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
174
	.quad 0x3c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
189
	.quad 0x3c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
175
	.quad 0x3e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
190
	.quad 0x3e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
176
	
191
	
177
.align 4096
192
.align 4096
178
.global ptl_1
193
.global ptl_1
179
ptl_1:
194
ptl_1:
180
	.quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT)
195
	.quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT)
181
	.fill 509,8,0
196
	.fill 509,8,0
182
	.quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT)
197
	.quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT)
183
	.fill 1,8,0
198
	.fill 1,8,0
184
	
199
	
185
.align 4096
200
.align 4096
186
.global ptl_0
201
.global ptl_0
187
ptl_0:
202
ptl_0:
188
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
203
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
189
	.fill 510,8,0
204
	.fill 510,8,0
190
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
205
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
191
 
206
 
192
.global real_bootstrap_gdtr_boot
207
.global real_bootstrap_gdtr_boot
193
real_bootstrap_gdtr_boot:
208
real_bootstrap_gdtr_boot:
194
	.word gdtselector(GDT_ITEMS)
209
	.word gdtselector(GDT_ITEMS)
195
	.long KA2PA(gdt)-BOOT_OFFSET
210
	.long KA2PA(gdt)-BOOT_OFFSET
196
 
211