1 files changed, 60 insertions, 0 deletions
diff --git a/kernel/cpu/arch_inst.s b/kernel/cpu/arch_inst.s
new file mode 100644
index 0000000..aaf34b6
--- /dev/null
+++ b/kernel/cpu/arch_inst.s
@@ -0,0 +1,60 @@
+.intel_syntax noprefix
+.global get_current_sp
+.global get_current_sbp
+.global halt
+.global get_cr2
+.global set_sp
+.global set_sbp
+.global flush_tlb
+.global set_cr3
+.global get_cr3
+.global enable_paging
+
+get_current_sp:
+	mov eax, esp
+	sub eax, 4
+	ret
+
+get_current_sbp:
+	mov eax, ebp
+	ret
+
+set_sp:
+	mov ecx, [esp] # store the return address in ecx
+	mov eax, [esp + 4]
+	mov esp, eax
+	jmp ecx # jump to the return address instead of doing a ret as the stack values may have changed
+
+set_sbp:
+	mov eax, [esp + 4]
+	mov ebp, eax
+	ret
+
+halt:
+	hlt
+	jmp $
+	ret
+
+get_cr2:
+	mov eax, cr2
+	ret
+
+flush_tlb:
+	mov eax, cr3
+	mov cr3, eax
+	ret
+
+set_cr3:
+	mov eax, [esp + 4]
+	mov cr3, eax
+	ret
+
+get_cr3:
+	mov eax, cr3
+	ret
+
+enable_paging:
+	mov eax, cr0
+        or eax, 0b10000000000000000000000000000000
+	mov cr0, eax
+	ret