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comparison bootstrap.S @ 10:50e4b9ca4867

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add bootstrap source. Go to 64bit mode.
author Taiki TAIRA <e095767@ie.u-ryukyu.ac.jp>
date Mon, 27 Aug 2012 23:45:31 +0900
parents bd2f9ba6f5f8
children 26b76ada8c13
comparison
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9:bd2f9ba6f5f8 10:50e4b9ca4867
2 * This program is boot to kernel. 2 * This program is boot to kernel.
3 * Change mode to 64bit mode and go to CbC kernel. 3 * Change mode to 64bit mode and go to CbC kernel.
4 */ 4 */
5 5
6 #include "multiboot2.h" 6 #include "multiboot2.h"
7 #include "boot_header.h"
7 8
8 .file "bootstrap.S" 9 .file "bootstrap.S"
9 10
10 .text 11 .text
11 .code32 12 .code32
53 /* 54 /*
54 * Initialize page tables to 0 55 * Initialize page tables to 0
55 * 6144 = 512*8*6/4 56 * 6144 = 512*8*6/4
56 */ 57 */
57 58
59 movl $0x01fe9000, %ebx
58 leal pgtable(%ebx), %edi 60 leal pgtable(%ebx), %edi
59 xorl %eax, %eax 61 xorl %eax, %eax
60 movl $6144, %ecx 62 movl $6144, %ecx
61 rep stosl 63 rep stosl
62 64
63 /* Build Level 4 */ 65 /* Build Level 4 */
64 leal pgtable + 0(%ebx), %edi 66 leal pgtable + 0(%ebx), %edi
65 leal 0x1007(%edi), %eax 67 leal 0x1007(%edi), %eax
66 movl %eax, 0(%edi) 68 movl %eax, 0(%edi)
67 69
70 /* Build Level 3 */
71 leal pgtable + 0x1000(%ebx), %edi
72 leal 0x1007(%edi), %eax
73 movl $4, %ecx
74 1: movl %eax, 0x00(%edi)
75 addl $0x00001000, %eax
76 addl $8, %edi
77 decl %ecx
78 jnz 1b
68 79
80 /* Build level 2 */
81 leal pgtable + 0x2000(%ebx), %edi
82 movl $0x00000183, %eax
83 movl $2048, %ecx
84 1: movl %eax, 0(%edi)
85 addl $0x00200000, %eax
86 addl $8, %edi
87 decl %ecx
88 jnz 1b
89
90 /* Enable the boot page talbes */
91 leal pgtable(%ebx), %eax
92 movl %eax, %cr3
93
94 /* Enable Long mode */
95 movl $MSR_EFER, %ecx
96 rdmsr
97 btsl $EFER_LME, %eax
98 wrmsr
99
100
69 jmp start_kernel 101 jmp start_kernel
70 102
103
104 /* jump to kernel.
105 * push ebx and eax send argument to kernel.
106 */
71 start_kernel: 107 start_kernel:
72 pushl %ebx 108 pushl %ebx
73 pushl %eax 109 pushl %eax
74 call kmain 110 call kmain
75 111