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Merge remote-tracking branch 'Kernel/master'
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EnderIce2
81
Kernel/arch/amd64/bootstrap/multiboot/Helper/detect.s
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81
Kernel/arch/amd64/bootstrap/multiboot/Helper/detect.s
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/*
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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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.intel_syntax noprefix
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.code32
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.section .bootstrap.text, "a"
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.global DetectCPUID
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DetectCPUID:
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pushfd
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pop eax
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mov ecx, eax
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xor eax, 0x200000
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push eax
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popfd
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pushfd
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pop eax
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push ecx
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popfd
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xor eax, ecx
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jz .NoCPUID
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mov eax, 0x1
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ret
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.NoCPUID:
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xor eax, eax
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ret
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.global Detect64Bit
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Detect64Bit:
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mov eax, 0x80000000
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cpuid
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cmp eax, 0x80000001
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jb .NoLongMode
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mov eax, 0x80000001
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cpuid
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test edx, 0x20000000
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jz .NoLongMode
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mov eax, 0x1
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ret
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.NoLongMode:
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xor eax, eax
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ret
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.global DetectPSE
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DetectPSE:
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mov eax, 0x00000001
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cpuid
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test edx, 0x00000008
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jz .NoPSE
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mov eax, 0x1
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ret
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.NoPSE:
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xor eax, eax
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ret
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.global DetectPAE
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DetectPAE:
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mov eax, 0x00000001
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cpuid
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test edx, 0x00000040
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jz .NoPAE
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mov eax, 0x1
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ret
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.NoPAE:
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xor eax, eax
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ret
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64
Kernel/arch/amd64/bootstrap/multiboot/Helper/gdt32.s
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64
Kernel/arch/amd64/bootstrap/multiboot/Helper/gdt32.s
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@ -0,0 +1,64 @@
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/*
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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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62
Kernel/arch/amd64/bootstrap/multiboot/Helper/gdt64.s
Normal file
62
Kernel/arch/amd64/bootstrap/multiboot/Helper/gdt64.s
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@ -0,0 +1,62 @@
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/*
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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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