Introduce integration test crate

1 files changed, 0 insertions, 172 deletions

diff --git a/kernel/src/boot.asm b/kernel/src/boot.asm
deleted file mode 100644
index 36b1ef9..0000000
--- a/kernel/src/boot.asm
+++ /dev/null
@@ -1,172 +0,0 @@
-global start
-extern long_mode_start
-
-section .text
-bits 32
-start:
-	mov esp, stack_top
-    
-	call check_multiboot
-	call check_cpuid
-	call check_long_mode
-
-	call setup_page_tables
-	call enable_paging
-
-   
-    ; load the 64-bit GDT
-    lgdt [gdt64.pointer]
-	jmp gdt64.code:long_mode_start
-
-	hlt
-
-check_multiboot:
-	cmp eax, 0x36d76289
-	jne .no_multiboot
-	ret
-.no_multiboot:
-	mov al, "0"
-	jmp error
-
-check_cpuid:
-	; Check if CPUID is supported by attempting to flip the ID bit (bit 21)
-    ; in the FLAGS register. If we can flip it, CPUID is available.
-
-    ; Copy EFLAGS in to EAX via stack
-	pushfd
-	pop eax
-
-	; Save the current flags
-	mov ecx, eax
-
-	; Flip the ID bit
-	xor eax, 1 << 21
-
-	; push eax to eflags
-	push eax
-	popfd
-
-	; Copy EAX to FLAGS via the Stack
-	pushfd
-	pop eax
-
-	; Restore FLAGS from the old version stored in ECX (i.e. flipping the
-    ; ID bit back if it was ever flipped).
-    push ecx
-    popfd
-
-	; Check if the ID was changed
-	cmp eax, ecx
-	je .no_cpuid
-	ret
-.no_cpuid:
-	mov al, "1"
-	jmp error
-
-check_long_mode:
-    ; test if extended processor info in available
-    mov eax, 0x80000000    ; implicit argument for cpuid
-    cpuid                  ; get highest supported argument
-    cmp eax, 0x80000001    ; it needs to be at least 0x80000001
-    jb .no_long_mode       ; if it's less, the CPU is too old for long mode
-	
-	; extended info about long mode
-    mov eax, 0x80000001    ; argument for the cpuid function
-    cpuid                  ; Cpu id
-	test edx, 1 << 29  	   ; check long mode availablity
-	jz .no_long_mode
-	ret
-
-.no_long_mode:
-	mov al, "2"
-	jmp error
-
-setup_page_tables:
-	; map first P4 entry to P3 table
-    mov eax, p3_table
-    or eax, 0b11 ; present + writable
-    mov [p4_table], eax
-
-    ; map first P3 entry to P2 table
-    mov eax, p2_table
-    or eax, 0b11 ; present + writable
-    mov [p3_table], eax
-	
-	; map each P2 entry to a huge 2MiB page
-    mov ecx, 0         ; counter variable
-    mov eax, 0b10000011 ; huge + writable + present
-
-.map_p2_table:
-    cmp eax, 0b10000011 + stack_bottom
-    jne .valid_mem
-    mov ebx, 0b10000010
-    mov [p2_table + ecx], ebx
-    add ecx, 8
-    cmp ecx, 4096
-    jne .valid_mem
-    ret
-.valid_mem:
-    mov [p2_table + ecx], eax
-    add eax, 0x200000  ; 2MiB
-
-    add ecx, 8
-    cmp ecx, 4096
-    jne .map_p2_table
-
-    ret
-
-enable_paging:
-	mov eax, p4_table
-	mov cr3, eax
-
-    ; enable PAE-flag in cr4 (Physical Address Extension)
-    mov eax, cr4
-    or eax, 1 << 5
-    mov cr4, eax
-
-    ; set the long mode bit in the EFER MSR (model specific register)
-    mov ecx, 0xC0000080
-    rdmsr
-    or eax, 1 << 8
-    wrmsr
-
-    ; enable paging in the cr0 register
-    mov eax, cr0
-    or eax, 1 << 31
-    mov cr0, eax
-
-    ; move stack pointer to accommodate for the guard page
-    add esp, 0x200000
-
-    ret
-
-section .rodata
-gdt64:
-    dq 0 ; zero entry
-.code: equ $ - gdt64
-    dq (1<<43) | (1<<44) | (1<<47) | (1<<53) ; code segment
-.pointer:
-    dw $ - gdt64 - 1
-    dq gdt64
-
-; Prints 'ERR: ' and the given error code to the screen and halts
-; parameter: error code letter (ascii) in al
-error:
-	mov dword [0xb8000], 0x4f524f45
-	mov dword [0xb8004], 0x4f3a4f52
-	mov dword [0xb8008], 0x4f504f20
-	mov byte  [0xb800a], al
-	hlt
-
-section .bss
-align 4096
-p4_table:
-	resb 4096
-p3_table:
-	resb 4096
-p2_table:
-	resb 4096
-alignb 4096 * 512  ; align memory into huge memory page
-stack_bottom:
-	resb 4096 * 42
-stack_top: