44 lines
1.1 KiB
ArmAsm
44 lines
1.1 KiB
ArmAsm
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/*
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* This file is part of the coreboot project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program 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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*/
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.code32
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.section ".text._gdt_", "ax", @progbits
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.globl gdt_init
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gdt_init:
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lgdt %cs:gdtptr
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ret
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.previous
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.align 4
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.globl gdtptr
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gdt:
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gdtptr:
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.word gdt_end - gdt -1 /* compute the table limit */
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.long gdt /* we know the offset */
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.word 0
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/* selgdt 0x08, flat code segment */
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.word 0xffff, 0x0000
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.byte 0x00, 0x9b, 0xcf, 0x00 /* G=1 and 0x0f, So we get 4Gbytes
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for limit */
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/* selgdt 0x10,flat data segment */
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.word 0xffff, 0x0000
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.byte 0x00, 0x93, 0xcf, 0x00
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/* selgdt 0x18, flat code segment (64-bit) */
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.word 0xffff, 0x0000
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.byte 0x00, 0x9b, 0xaf, 0x00
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gdt_end:
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