mirror of
https://github.com/Fennix-Project/Kernel.git
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65 lines
1.2 KiB
ArmAsm
65 lines
1.2 KiB
ArmAsm
/*
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This file is part of Fennix Kernel.
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Fennix Kernel is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Kernel is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
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*/
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.code32
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.section .bootstrap.text, "a"
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.align 32
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.global gdtr
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gdtr:
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.word GDT32_END - GDT32 - 1
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.long GDT32
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.align 32
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GDT32:
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.quad 0x0
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.word 0xFFFF
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.word 0x0000
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.byte 0x00
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.word 0xCF9A
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.byte 0x00
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.word 0xFFFF
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.word 0x0000
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.byte 0x00
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.word 0xCF92
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.byte 0x00
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.word 0x0100
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.word 0x1000
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.byte 0x00
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.word 0x4092
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.byte 0x00
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GDT32_END:
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nop
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.global LoadGDT32
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LoadGDT32:
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lgdt [gdtr]
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ljmp $0x8, $ActivateGDT
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ActivateGDT:
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mov $0x10, %cx
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mov %cx, %ss
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mov %cx, %ds
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mov %cx, %es
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mov %cx, %fs
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mov $0x18, %cx
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mov %cx, %gs
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ret
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