source: mainline/arch/amd64/src/boot/boot.S@ 6ecc8bce

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 6ecc8bce was 93165be, checked in by Ondrej Palkovsky <ondrap@…>, 19 years ago

Add support for more then 2GB of address space for AMD64.
  • Property mode set to 100644
File size: 8.7 KB
Line 
1#
2# Copyright (C) 2005 Ondrej Palkovsky
3# Copyright (C) 2006 Martin Decky
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions
8# are met:
9#
10# - Redistributions of source code must retain the above copyright
11# notice, this list of conditions and the following disclaimer.
12# - Redistributions in binary form must reproduce the above copyright
13# notice, this list of conditions and the following disclaimer in the
14# documentation and/or other materials provided with the distribution.
15# - The name of the author may not be used to endorse or promote products
16# derived from this software without specific prior written permission.
17#
18# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28#
29
30#include <arch/boot/boot.h>
31#include <arch/boot/memmap.h>
32#include <arch/mm/page.h>
33#include <arch/mm/ptl.h>
34#include <arch/pm.h>
35#include <arch/cpu.h>
36#include <arch/cpuid.h>
37
38#define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE)
39
40.section K_TEXT_START, "ax"
41
42.code32
43.align 4
44.global multiboot_image_start
45multiboot_header:
46 .long MULTIBOOT_HEADER_MAGIC
47 .long MULTIBOOT_HEADER_FLAGS
48 .long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum
49 .long multiboot_header
50 .long unmapped_ktext_start
51 .long 0
52 .long 0
53 .long multiboot_image_start
54
55multiboot_image_start:
56 movl $START_STACK, %esp # initialize stack pointer
57 lgdt bootstrap_gdtr # initialize Global Descriptor Table register
58
59 movw $gdtselector(KDATA_DES), %cx
60 movw %cx, %es
61 movw %cx, %ds # kernel data + stack
62 movw %cx, %ss
63 # Simics seems to remove hidden part of GS on entering user mode
64 # when _visible_ part of GS does not point to user-mode segment
65 movw $gdtselector(UDATA_DES), %cx
66 movw %cx, %fs
67 movw %cx, %gs
68
69 jmpl $gdtselector(KTEXT32_DES), $multiboot_meeting_point
70 multiboot_meeting_point:
71
72 movl %eax, grub_eax # save parameters from GRUB
73 movl %ebx, grub_ebx
74
75 # Protected 32-bit. We want to reuse the code-seg descriptor,
76 # the Default operand size must not be 1 when entering long mode
77
78 movl $0x80000000, %eax
79 cpuid
80 cmp $0x80000000, %eax # any function > 80000000h?
81 jbe long_mode_unsupported
82 movl $(AMD_CPUID_EXTENDED), %eax # Extended function code 80000001
83 cpuid
84 bt $29, %edx # Test if long mode is supported.
85 jc long_mode_supported
86
87 long_mode_unsupported:
88 cli
89 hlt
90
91 long_mode_supported:
92
93 # Enable 64-bit page transaltion entries - CR4.PAE = 1.
94 # Paging is not enabled until after long mode is enabled
95
96 movl %cr4, %eax
97 btsl $5, %eax
98 movl %eax, %cr4
99
100 # Set up paging tables
101
102 leal ptl_0, %eax
103 movl %eax, %cr3
104
105 # Enable long mode
106
107 movl $EFER_MSR_NUM, %ecx # EFER MSR number
108 rdmsr # Read EFER
109 btsl $AMD_LME_FLAG, %eax # Set LME=1
110 wrmsr # Write EFER
111
112 # Enable paging to activate long mode (set CR0.PG=1)
113
114 movl %cr0, %eax
115 btsl $31, %eax
116 movl %eax, %cr0
117
118 # At this point we are in compatibility mode
119
120 jmpl $gdtselector(KTEXT_DES), $start64
121
122.code64
123start64:
124 movq $(PA2KA(START_STACK)), %rsp
125 movl grub_eax, %eax
126 movl grub_ebx, %ebx
127
128 cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature
129 je valid_boot
130
131 xorl %ecx, %ecx # no memory size or map available
132 movl %ecx, e801memorysize
133 movl %ecx, e820counter
134
135 jmp invalid_boot
136
137 valid_boot:
138
139 movl (%ebx), %eax # ebx = physical address of struct multiboot_info
140
141 bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid)
142 jc mem_valid
143
144 xorl %ecx, %ecx
145 jmp mem_invalid
146
147 mem_valid:
148 movl 4(%ebx), %ecx # mbi->mem_lower
149 addl 8(%ebx), %ecx # mbi->mem_upper
150
151 mem_invalid:
152 movl %ecx, e801memorysize
153
154 bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid)
155 jc mods_valid
156
157 xorq %rcx, %rcx
158 movq %rcx, init
159 jmp mods_end
160
161 mods_valid:
162
163 xorq %rcx, %rcx
164 movl 20(%ebx), %ecx # mbi->mods_count
165 movq %rcx, init
166
167 cmpl $0, %ecx
168 je mods_end
169
170 movl 24(%ebx), %esi # mbi->mods_addr
171 movq $init, %rdi
172
173 mods_loop:
174
175 xorq %rdx, %rdx
176 movl 0(%esi), %edx # mods->mod_start
177 movq $0xffff800000000000, %r10
178 addq %r10, %rdx
179 movq %rdx, 8(%rdi)
180
181 xorq %rdx, %rdx
182 movl 4(%esi), %edx
183 subl 0(%esi), %edx # mods->mod_end - mods->mod_start
184 movq %rdx, 16(%rdi)
185
186 addl $16, %esi
187 addq $16, %rdi
188
189 loop mods_loop
190
191 mods_end:
192
193 bt $6, %eax # mbi->flags[6] (mmap_length, mmap_addr valid)
194 jc mmap_valid
195
196 xorl %edx, %edx
197 jmp mmap_invalid
198
199 mmap_valid:
200 movl 44(%ebx), %ecx # mbi->mmap_length
201 movl 48(%ebx), %esi # mbi->mmap_addr
202 movq $e820table, %rdi
203 xorl %edx, %edx
204
205 mmap_loop:
206 cmpl $0, %ecx
207 jle mmap_end
208
209 movl 4(%esi), %eax # mmap->base_addr_low
210 movl %eax, (%rdi)
211
212 movl 8(%esi), %eax # mmap->base_addr_high
213 movl %eax, 4(%rdi)
214
215 movl 12(%esi), %eax # mmap->length_low
216 movl %eax, 8(%rdi)
217
218 movl 16(%esi), %eax # mmap->length_high
219 movl %eax, 12(%rdi)
220
221 movl 20(%esi), %eax # mmap->type
222 movl %eax, 16(%rdi)
223
224 movl (%esi), %eax # mmap->size
225 addl $0x4, %eax
226 addl %eax, %esi
227 subl %eax, %ecx
228 addq $MEMMAP_E820_RECORD_SIZE, %rdi
229 incl %edx
230 jmp mmap_loop
231
232 mmap_end:
233
234 mmap_invalid:
235 movl %edx, e820counter
236
237 invalid_boot:
238
239#ifdef CONFIG_SMP
240
241 # copy AP bootstrap routines below 1 MB
242
243 movq $BOOT_OFFSET, %rsi
244 movq $AP_BOOT_OFFSET, %rdi
245 movq $_hardcoded_unmapped_size, %rcx
246 cld
247 rep movsb
248
249#endif
250
251 call main_bsp # never returns
252
253 cli
254 hlt
255
256.section K_DATA_START, "aw", @progbits
257.align 4096
258
259# Identical mapping of first 64MB and the same of -2GB -> 0
260.global ptl_2
261ptl_2:
262 .quad 0x0 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
263 .quad 0x200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
264 .quad 0x400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
265 .quad 0x600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
266 .quad 0x800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
267 .quad 0xa00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
268 .quad 0xc00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
269 .quad 0xe00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
270 .quad 0x1000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
271 .quad 0x1200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
272 .quad 0x1400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
273 .quad 0x1600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
274 .quad 0x1800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
275 .quad 0x1a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
276 .quad 0x1c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
277 .quad 0x1e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
278 .quad 0x2000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
279 .quad 0x2200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
280 .quad 0x2400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
281 .quad 0x2600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
282 .quad 0x2800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
283 .quad 0x2a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
284 .quad 0x2c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
285 .quad 0x2e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
286 .quad 0x3000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
287 .quad 0x3200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
288 .quad 0x3400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
289 .quad 0x3600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
290 .quad 0x3800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
291 .quad 0x3a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
292 .quad 0x3c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
293 .quad 0x3e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
294
295.align 4096
296.global ptl_1
297ptl_1:
298 .quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT)
299 .fill 509,8,0
300 .quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT)
301 .fill 1,8,0
302
303.align 4096
304.global ptl_0
305ptl_0:
306 .quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
307 .fill 255,8,0
308 .quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
309 .fill 254,8,0
310 .quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
311
312.global bootstrap_gdtr
313bootstrap_gdtr:
314 .word gdtselector(GDT_ITEMS)
315 .long KA2PA(gdt)
316
317grub_eax:
318 .long 0
319
320grub_ebx:
321 .long 0
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