From 9fde748acea83d775e367a64858414b674f05b13 Mon Sep 17 00:00:00 2001
From: Miguel <m.i@gmx.at>
Date: Sat, 8 Sep 2018 17:08:55 +0200
Subject: struggling with pic and lapic and smp...

---
 asm/asm_mp.asm | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

(limited to 'asm/asm_mp.asm')

diff --git a/asm/asm_mp.asm b/asm/asm_mp.asm
index 5e5259e..165dc97 100644
--- a/asm/asm_mp.asm
+++ b/asm/asm_mp.asm
@@ -1,7 +1,8 @@
 global smp_start
-global LLOCK
 extern smp_main
 global gdt_descriptor
+global asm_smp_unlock
+
 
 ; master boot record for application processors
 smp_start:
@@ -20,7 +21,12 @@ smp_start:
 [bits 32]
 
 
-LLOCK:	    dd 0
+LLOCK:	    dd 1
+
+asm_smp_unlock:
+    mov eax, 0x0
+    mov [LLOCK], eax
+    ret
 
 init_pm:
 
@@ -31,7 +37,7 @@ init_pm:
     mov fs, ax
     mov gs, ax
 
-    mov ebp, 0x7000
+    mov ebp, 0x7000         ;temporary stack
     mov esp, ebp
 
     call boot_32_pm	    ;continue booting in 32-bit protected mode
@@ -46,11 +52,11 @@ boot_32_pm:
     mov ebp, 0x7000
     mov esp, ebp
 
-    call smp_main
+    and esp,-16  ; padding to align stack on 16byte boundary before CALL
+    call smp_main 
 
     jmp $ ; should never be reached
 
-
 gdt_start:
 
 gdt_null:   ;null descriptor (2 x 4 bytes)
-- 
cgit v1.2.3