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Move bootloader code to a separate directory

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This commit is contained in:
Alex 2023-03-19 21:59:38 +02:00
parent 0f3efdf25b
commit 8ff3623ee4
Signed by untrusted user who does not match committer: enderice2
GPG Key ID: EACC3AD603BAB4DD
9 changed files with 128 additions and 110 deletions
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4
Architecture/amd64/Limine.c → Architecture/amd64/Bootstrap/Limine.c
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@ -3,8 +3,8 @@
#include <debug.h>
#include <convert.h>
#include "../../../tools/limine/limine.h"
#include "../../kernel.h"
#include "../../../../tools/limine/limine.h"
#include "../../../kernel.h"
void init_limine();

1
Architecture/amd64/runtime/crt1.c
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@ -13,4 +13,3 @@ void _start(void *Raw)
Entry(NULL);
return;
}
// C stuff

54
Architecture/i686/Bootstrap/MB2.asm Normal file
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@ -0,0 +1,54 @@
; https://wiki.osdev.org/Higher_Half_x86_Bare_Bones
; https://wiki.osdev.org/Higher_Half_x86_Bare_Bones_(Backup)
KERNEL_VIRTUAL_BASE equ 0xC0000000 ; 3GB
KERNEL_STACK_SIZE equ 0x4000 ; 16KB
extern Multiboot2Entry
extern BootPageTable
global MB2_start
section .text
MB2_start:
cli
mov word [0xb8F00], 0x072E ; .
mov ecx, (BootPageTable - KERNEL_VIRTUAL_BASE)
mov cr3, ecx
mov word [0xb8F02], 0x072E ; .
mov ecx, cr4
or ecx, 0x00000010 ; Set PSE in CR4
mov cr4, ecx
mov word [0xb8F04], 0x072E ; .
mov ecx, cr0
or ecx, 0x80000000 ; Set PG in CR0
mov cr0, ecx
mov word [0xb8F06], 0x072E ; .
lea ecx, [HigherHalfStart]
jmp ecx
HigherHalfStart:
mov word [0xb8F08], 0x072E ; .
mov dword [BootPageTable], 0
invlpg [0]
mov esp, KernelStack + KERNEL_STACK_SIZE
push eax ; Multiboot2 Magic
add ebx, KERNEL_VIRTUAL_BASE
push ebx ; Multiboot2 Header
call Multiboot2Entry
Loop:
hlt
jmp Loop
section .bss
align 16
KernelStack:
resb KERNEL_STACK_SIZE

41
Architecture/i686/Bootstrap/MB2Header.asm Normal file
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@ -0,0 +1,41 @@
section .multiboot2
align 4096
HEADER_START:
dd 0xE85250D6
dd 0
dd (HEADER_END - HEADER_START)
dd 0x100000000 - (HEADER_END - HEADER_START) - 0 - 0xE85250D6
align 8
MB2_INFO_REQUEST_TAG_START:
dw 1
dw 0
dd MB2_INFO_REQUEST_TAG_END - MB2_INFO_REQUEST_TAG_START
dd 1 ; Command Line
dd 2 ; Boot Loader Name
dd 3 ; Module
dd 4 ; Basic Memory Information
dd 5 ; BIOS Boot Device
dd 6 ; Memory Map
dd 7 ; VBE
dd 8 ; Framebuffer
dd 9 ; ELF Sections
dd 10 ; APM Table
dd 11 ; EFI 32-bit System Table Pointer
dd 12 ; EFI 64-bit System Table Pointer
; dd 13 ; SMBIOS
dd 14 ; ACPI Old
dd 15 ; ACPI New
dd 16 ; Network
dd 17 ; EFI Memory Map
dd 18 ; EFI Boot Services Notifier
dd 19 ; EFI 32-bit Image Handle Pointer
dd 20 ; EFI 64-bit Image Handle Pointer
dd 21 ; Load Base Address
MB2_INFO_REQUEST_TAG_END:
align 8
MB2_TAG_START:
dw 0
dw 0
dd MB2_TAG_END - MB2_TAG_START
MB2_TAG_END:
HEADER_END:

13
Architecture/i686/Bootstrap/MB2PageTable.asm Normal file
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@ -0,0 +1,13 @@
KERNEL_VIRTUAL_BASE equ 0xC0000000 ; 3GB
KERNEL_PAGE_NUMBER equ (KERNEL_VIRTUAL_BASE >> 22) ; 768
section .data
global BootPageTable
align 0x1000
BootPageTable:
dd 0x00000083
dd 0x00000083
times (KERNEL_PAGE_NUMBER - 2) dd 0
dd 0x00000083
dd 0x00000083
times (1024 - KERNEL_PAGE_NUMBER - 2) dd 0

4
Architecture/i686/Multiboot2.cpp → Architecture/i686/Bootstrap/Multiboot2.cpp
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@ -4,7 +4,7 @@
#include <memory.hpp>
#include <io.h>
#include "../../kernel.h"
#include "../../../kernel.h"
BootInfo mb2binfo;
@ -305,7 +305,7 @@ void ProcessMB2(unsigned long Info)
}
}
EXTERNC void x32Multiboot2Entry(unsigned long Info, unsigned int Magic)
EXTERNC void Multiboot2Entry(unsigned long Info, unsigned int Magic)
{
if (Info == NULL || Magic == NULL)
{

2
Architecture/i686/linker.ld
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@ -1,7 +1,7 @@
OUTPUT_FORMAT(elf32-i386)
OUTPUT_ARCH(i386)
ENTRY(_start)
ENTRY(MB2_start)
SECTIONS
{

104
Architecture/i686/runtime/crt1.asm
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@ -1,104 +0,0 @@
; https://wiki.osdev.org/Higher_Half_x86_Bare_Bones
; https://wiki.osdev.org/Higher_Half_x86_Bare_Bones_(Backup)
section .multiboot2
align 4096
HEADER_START:
dd 0xE85250D6
dd 0
dd (HEADER_END - HEADER_START)
dd 0x100000000 - (HEADER_END - HEADER_START) - 0 - 0xE85250D6
align 8
MB2_INFO_REQUEST_TAG_START:
dw 1
dw 0
dd MB2_INFO_REQUEST_TAG_END - MB2_INFO_REQUEST_TAG_START
dd 1 ; Command Line
dd 2 ; Boot Loader Name
dd 3 ; Module
dd 4 ; Basic Memory Information
dd 5 ; BIOS Boot Device
dd 6 ; Memory Map
dd 7 ; VBE
dd 8 ; Framebuffer
dd 9 ; ELF Sections
dd 10 ; APM Table
dd 11 ; EFI 32-bit System Table Pointer
dd 12 ; EFI 64-bit System Table Pointer
; dd 13 ; SMBIOS
dd 14 ; ACPI Old
dd 15 ; ACPI New
dd 16 ; Network
dd 17 ; EFI Memory Map
dd 18 ; EFI Boot Services Notifier
dd 19 ; EFI 32-bit Image Handle Pointer
dd 20 ; EFI 64-bit Image Handle Pointer
dd 21 ; Load Base Address
MB2_INFO_REQUEST_TAG_END:
align 8
MB2_TAG_START:
dw 0
dw 0
dd MB2_TAG_END - MB2_TAG_START
MB2_TAG_END:
HEADER_END:
KERNEL_VIRTUAL_BASE equ 0xC0000000 ; 3GB
KERNEL_PAGE_NUMBER equ (KERNEL_VIRTUAL_BASE >> 22) ; 768
KERNEL_STACK_SIZE equ 0x4000 ; 16KB
extern x32Multiboot2Entry
global _start
section .data
align 0x1000
BootPageTable:
dd 0x00000083
dd 0x00000083
times (KERNEL_PAGE_NUMBER - 2) dd 0
dd 0x00000083
dd 0x00000083
times (1024 - KERNEL_PAGE_NUMBER - 2) dd 0
section .text
_start:
mov word [0xb8F00], 0x072E ; .
mov ecx, (BootPageTable - KERNEL_VIRTUAL_BASE)
mov cr3, ecx
mov word [0xb8F02], 0x072E ; .
mov ecx, cr4
or ecx, 0x00000010 ; Set PSE in CR4
mov cr4, ecx
mov word [0xb8F04], 0x072E ; .
mov ecx, cr0
or ecx, 0x80000000 ; Set PG in CR0
mov cr0, ecx
mov word [0xb8F06], 0x072E ; .
lea ecx, [HigherHalfStart]
jmp ecx
HigherHalfStart:
mov word [0xb8F08], 0x072E ; .
mov dword [BootPageTable], 0
invlpg [0]
mov esp, KernelStack + KERNEL_STACK_SIZE
push eax ; Multiboot2 Magic
add ebx, KERNEL_VIRTUAL_BASE
push ebx ; Multiboot2 Header
call x32Multiboot2Entry
Loop:
hlt
jmp Loop
section .bss
align 16
KernelStack :
resb KERNEL_STACK_SIZE

15
Architecture/i686/runtime/crt1.c Normal file
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@ -0,0 +1,15 @@
#include <types.h>
#include <debug.h>
int Entry(void *Info);
void _start(void *Raw)
{
UNUSED(Raw);
error("ERROR! INVALID BOOT PROTOCOL!");
while (1)
asmv("hlt");
Entry(NULL);
return;
}