mirror of
https://github.com/Fennix-Project/Kernel.git
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63 lines
1.3 KiB
ArmAsm
63 lines
1.3 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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.code64
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.section .bootstrap.data, "a"
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/* Access bits */
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A = 0x1
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RW = 0x2
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DC = 0x4
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E = 0x8
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S = 0x10
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DPL0 = 0x0 /* 0 << 5 ???? */
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DPL1 = 0x20
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P = 0x80
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/* Flags bits */
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LONG_MODE = 0x20
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SZ_32 = 0x40
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GRAN_4K = 0x80
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.global GDT64.Null
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.global GDT64.Code
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.global GDT64.Data
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.global GDT64.Tss
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.global GDT64.Ptr
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GDT64:
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GDT64.Null = . - GDT64
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.quad 0
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GDT64.Code = . - GDT64
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.long 0xFFFF
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.byte 0
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.byte P | S | E | RW
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.byte GRAN_4K | LONG_MODE | 0xF
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.byte 0
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GDT64.Data = . - GDT64
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.long 0xFFFF
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.byte 0
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.byte P | S | RW
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.byte GRAN_4K | SZ_32 | 0xF
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.byte 0
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GDT64.Tss = . - GDT64
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.long 0x00000068
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.long 0x00CF8900
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GDT64.Ptr:
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.word . - GDT64 - 1
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.quad GDT64
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