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164 | palkovsky | 1 | # |
288 | jermar | 2 | # Copyright (C) 2005 Ondrej Palkovsky |
164 | palkovsky | 3 | # All rights reserved. |
4 | # |
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5 | # Redistribution and use in source and binary forms, with or without |
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6 | # modification, are permitted provided that the following conditions |
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7 | # are met: |
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8 | # |
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9 | # - Redistributions of source code must retain the above copyright |
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10 | # notice, this list of conditions and the following disclaimer. |
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11 | # - Redistributions in binary form must reproduce the above copyright |
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12 | # notice, this list of conditions and the following disclaimer in the |
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13 | # documentation and/or other materials provided with the distribution. |
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14 | # - The name of the author may not be used to endorse or promote products |
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15 | # derived from this software without specific prior written permission. |
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16 | # |
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17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | # |
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28 | |||
194 | palkovsky | 29 | #include <arch/mm/page.h> |
188 | palkovsky | 30 | #include <arch/mm/ptl.h> |
194 | palkovsky | 31 | #include <arch/pm.h> |
251 | palkovsky | 32 | #include <arch/cpu.h> |
275 | palkovsky | 33 | #include <arch/cpuid.h> |
34 | #include <arch/boot/boot.h> |
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164 | palkovsky | 35 | |
242 | palkovsky | 36 | #define START_STACK_64 0xffffffff80007c00 |
188 | palkovsky | 37 | |
164 | palkovsky | 38 | # |
39 | # This is where we require any SPARTAN-kernel-compatible boot loader |
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40 | # to pass control in real mode. |
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41 | # |
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42 | # Protected mode tables are statically initialised during compile |
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43 | # time. So we can just load the respective table registers and |
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44 | # switch to protected mode. |
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45 | # |
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275 | palkovsky | 46 | |
47 | #define START_STACK (BOOTSTRAP_OFFSET-0x400) |
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48 | |||
406 | jermar | 49 | .section K_TEXT_START, "ax" |
188 | palkovsky | 50 | .code16 |
51 | .global kernel_image_start |
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164 | palkovsky | 52 | kernel_image_start: |
178 | palkovsky | 53 | cli |
54 | xorw %ax,%ax |
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55 | movw %ax,%ds |
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347 | jermar | 56 | movw %ax,%es |
178 | palkovsky | 57 | movw %ax,%ss # initialize stack segment register |
275 | palkovsky | 58 | movl $(START_STACK), %esp # initialize stack pointer |
178 | palkovsky | 59 | |
242 | palkovsky | 60 | call memmap_arch_init |
178 | palkovsky | 61 | |
194 | palkovsky | 62 | movl $0x80000000, %eax |
178 | palkovsky | 63 | cpuid |
64 | cmp $0x80000000, %eax # any function > 80000000h? |
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65 | jbe no_long_mode |
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275 | palkovsky | 66 | movl $(AMD_CPUID_EXTENDED), %eax # Extended function code 80000001 |
178 | palkovsky | 67 | cpuid |
68 | bt $29, %edx # Test if long mode is supported. |
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69 | jnc no_long_mode |
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164 | palkovsky | 70 | |
188 | palkovsky | 71 | # Load gdtr, idtr |
282 | palkovsky | 72 | lgdt real_bootstrap_gdtr_boot |
188 | palkovsky | 73 | |
74 | movl %cr0,%eax |
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75 | orl $0x1,%eax |
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76 | movl %eax,%cr0 # switch to protected mode |
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164 | palkovsky | 77 | |
206 | palkovsky | 78 | jmpl $gdtselector(KTEXT32_DES), $now_in_prot |
164 | palkovsky | 79 | |
188 | palkovsky | 80 | no_long_mode: |
81 | 1: |
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82 | jmp 1b |
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83 | |||
277 | palkovsky | 84 | # Protected 32-bit. We want to reuse the code-seg descriptor, |
85 | # the Default operand size must not be 1 when entering long mode |
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86 | .code32 |
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188 | palkovsky | 87 | now_in_prot: |
88 | # Set up stack & data descriptors |
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206 | palkovsky | 89 | movw $gdtselector(KDATA_DES), %ax |
188 | palkovsky | 90 | movw %ax, %ds |
91 | movw %ax, %ss |
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92 | |||
275 | palkovsky | 93 | movb $0xd1, %al # enable A20 using the keyboard controller |
94 | outb %al, $0x64 |
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95 | movb $0xdf, %al |
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96 | outb %al, $0x60 |
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97 | |||
98 | |||
188 | palkovsky | 99 | # Enable 64-bit page transaltion entries - CR4.PAE = 1. |
100 | # Paging is not enabled until after long mode is enabled |
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101 | movl %cr4, %eax |
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102 | btsl $5, %eax |
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103 | movl %eax, %cr4 |
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104 | |||
105 | # Set up paging tables |
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106 | leal ptl_0, %eax |
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107 | movl %eax, %cr3 |
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275 | palkovsky | 108 | |
188 | palkovsky | 109 | # Enable long mode |
251 | palkovsky | 110 | movl $EFER_MSR_NUM, %ecx # EFER MSR number |
188 | palkovsky | 111 | rdmsr # Read EFER |
251 | palkovsky | 112 | btsl $AMD_LME_FLAG, %eax # Set LME=1 |
188 | palkovsky | 113 | wrmsr # Write EFER |
178 | palkovsky | 114 | |
188 | palkovsky | 115 | # Enable paging to activate long mode (set CR0.PG=1) |
116 | movl %cr0, %eax |
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117 | btsl $31, %eax |
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118 | movl %eax, %cr0 |
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119 | |||
120 | # At this point we are in compatibility mode |
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206 | palkovsky | 121 | jmpl $gdtselector(KTEXT_DES), $start64 |
164 | palkovsky | 122 | |
188 | palkovsky | 123 | .code64 |
124 | start64: |
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275 | palkovsky | 125 | movq $(PA2KA(START_STACK)), %rsp |
126 | |||
127 | # Copy kernel to higher physical memory |
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128 | movq $BOOTSTRAP_OFFSET, %rsi |
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129 | movq $BOOTSTRAP_OFFSET + BOOT_OFFSET, %rdi |
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130 | movq $_hardcoded_kernel_size, %rcx |
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131 | cld |
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132 | rep movsb |
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178 | palkovsky | 133 | |
188 | palkovsky | 134 | call main_bsp # never returns |
178 | palkovsky | 135 | 1: |
136 | jmp 1b |
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206 | palkovsky | 137 | |
406 | jermar | 138 | .section K_DATA_START, "aw", @progbits |
164 | palkovsky | 139 | .align 4096 |
206 | palkovsky | 140 | |
417 | palkovsky | 141 | # Identical mapping of first 64MB and the same of -2GB -> 0 |
188 | palkovsky | 142 | .global ptl_2 |
143 | ptl_2: |
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144 | .quad 0x0 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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145 | .quad 0x200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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146 | .quad 0x400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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147 | .quad 0x600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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148 | .quad 0x800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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149 | .quad 0xa00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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150 | .quad 0xc00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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151 | .quad 0xe00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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417 | palkovsky | 152 | .quad 0x1000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
153 | .quad 0x1200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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154 | .quad 0x1400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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155 | .quad 0x1600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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156 | .quad 0x1800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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157 | .quad 0x1a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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158 | .quad 0x1c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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159 | .quad 0x1e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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160 | .quad 0x2000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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161 | .quad 0x2200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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162 | .quad 0x2400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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163 | .quad 0x2600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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164 | .quad 0x2800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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165 | .quad 0x2a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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166 | .quad 0x2c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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167 | .quad 0x2e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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168 | .quad 0x3000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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169 | .quad 0x3200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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170 | .quad 0x3400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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171 | .quad 0x3600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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172 | .quad 0x3800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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173 | .quad 0x3a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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174 | .quad 0x3c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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175 | .quad 0x3e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) |
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188 | palkovsky | 176 | |
177 | .align 4096 |
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178 | .global ptl_1 |
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179 | ptl_1: |
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180 | .quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT) |
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181 | .fill 509,8,0 |
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182 | .quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT) |
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293 | palkovsky | 183 | .fill 1,8,0 |
188 | palkovsky | 184 | |
185 | .align 4096 |
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186 | .global ptl_0 |
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187 | ptl_0: |
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188 | .quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT) |
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189 | .fill 510,8,0 |
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190 | .quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT) |
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178 | palkovsky | 191 | |
282 | palkovsky | 192 | .global real_bootstrap_gdtr_boot |
193 | real_bootstrap_gdtr_boot: |
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206 | palkovsky | 194 | .word gdtselector(GDT_ITEMS) |
275 | palkovsky | 195 | .long KA2PA(gdt)-BOOT_OFFSET |