X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Kernel%2Farch%2Fx86_64%2Fstart64.asm;h=d0cc503fc1cbf8a2760aa85b4aad65987667bab3;hb=8a998da38a4eecface76749701079c833d64a7d8;hp=30fc9717b12309e9bbeaffb5e8a79d5b585a0787;hpb=1810e1d377b996679ae090bfe57d1b5321ce190f;p=tpg%2Facess2.git

diff --git a/Kernel/arch/x86_64/start64.asm b/Kernel/arch/x86_64/start64.asm
index 30fc9717..d0cc503f 100644
--- a/Kernel/arch/x86_64/start64.asm
+++ b/Kernel/arch/x86_64/start64.asm
@@ -2,13 +2,50 @@
 ; Acess2 x86_64 Port
 ;
 [bits 64]
+;KERNEL_BASE	equ	0xFFFF800000000000
+KERNEL_BASE	equ	0xFFFFFFFF80000000
+
+[extern kmain]
+
+[extern gMultibootPtr]
+[extern gMultibootMagic]
 
 [section .text]
 [global start64]
 start64:
+	; Load Registers
+	mov ax, 0x10
+	mov ds, ax
+	mov es, ax
+	mov fs, ax
+	mov gs, ax
+	
+	; Go to high memory
+	mov rax, start64.himem
+	jmp rax
+.himem:
+	
+	xor rax, rax
+	mov dr0, rax	; Set CPU0
+	
+	; Clear the screen
+	mov rax, 0x1F201F201F201F20	; Set the screen to White on blue, space (4 characters)
+	mov edi, 0xB8000
+	mov ecx, 80*25*2/8
+	rep stosq
+	
 	; Set kernel stack
+	mov rsp, gInitialKernelStack
+	
 	; Call main
-	jmp $
+	mov edi, [gMultibootMagic - KERNEL_BASE]
+	mov esi, [gMultibootPtr - KERNEL_BASE]
+	call kmain
+	
+	cli
+.hlt:
+	hlt
+	jmp .hlt
 
 [global GetRIP]
 GetRIP:
@@ -17,10 +54,10 @@ GetRIP:
 
 [global GetCPUNum]
 GetCPUNum:
-	str ax
-	mov gs, ax
 	xor rax, rax
-	mov al, [gs:104]	; End of TSS
+	str ax
+	sub ax, 0x38	; TSS Base
+	shr ax, 4	; One 16-byte TSS per CPU
 	ret
 
 KSTACK_USERSTATE_SIZE	equ	(16+1+5)*8	; GPRegs, CPU, IRET
@@ -63,6 +100,26 @@ Proc_ReturnToUser:
 	
 	iret
 
+; int CallWithArgArray(void *Ptr, int NArgs, Uint *Args)
+; Call a function passing the array as arguments
+[global CallWithArgArray]
+CallWithArgArray:
+	push rbp
+	mov rbp, rsp
+	mov rcx, [rbp+3*8]	; Get NArgs
+	mov rdx, [rbp+4*8]
+
+.top:
+	mov rax, [rdx+rcx*8-8]
+	push rax
+	loop .top
+	
+	mov rax, [rbp+2*8]
+	call rax
+	lea rsp, [rbp]
+	pop rbp
+	ret
+
 [section .usertext]
 User_Syscall_RetAndExit:
 	mov rdi, rax
@@ -74,6 +131,6 @@ User_Syscall_Exit:
 
 [section .bss]
 [global gInitialKernelStack]
-	resd	1024*1	; 1 Page
+	resd	1024*4	; 4 Pages
 gInitialKernelStack: