X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Kernel%2Farch%2Fx86_64%2Fstart64.asm;h=d0cc503fc1cbf8a2760aa85b4aad65987667bab3;hb=8a998da38a4eecface76749701079c833d64a7d8;hp=c98afdbd7af55d0a95e37590ec15b35f34cf2282;hpb=c6061d381c0af2dcc7c971347d036dc17399887a;p=tpg%2Facess2.git

diff --git a/Kernel/arch/x86_64/start64.asm b/Kernel/arch/x86_64/start64.asm
index c98afdbd..d0cc503f 100644
--- a/Kernel/arch/x86_64/start64.asm
+++ b/Kernel/arch/x86_64/start64.asm
@@ -2,9 +2,14 @@
 ; 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:
@@ -20,6 +25,9 @@ start64:
 	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
@@ -30,6 +38,8 @@ start64:
 	mov rsp, gInitialKernelStack
 	
 	; Call main
+	mov edi, [gMultibootMagic - KERNEL_BASE]
+	mov esi, [gMultibootPtr - KERNEL_BASE]
 	call kmain
 	
 	cli
@@ -44,10 +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
@@ -121,6 +131,6 @@ User_Syscall_Exit:
 
 [section .bss]
 [global gInitialKernelStack]
-	resd	1024*1	; 1 Page
+	resd	1024*4	; 4 Pages
 gInitialKernelStack: