1 files changed, 61 insertions, 0 deletions
diff --git a/arch/i386/machine/cpu_asm.S b/arch/i386/machine/cpu_asm.S
new file mode 100644
index 00000000..373ca8e2
--- /dev/null
+++ b/arch/i386/machine/cpu_asm.S
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2011, 2012 Richard Braun.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define __ASSEMBLY__
+
+#include <machine/asm.h>
+#include <machine/cpu.h>
+
+.text
+
+ENTRY(cpu_load_gdt)
+ movl 4(%esp), %eax
+ lgdt (%eax)
+
+ movl $(CPU_GDT_SELECTOR(CPU_GDT_DATA_IDX)), %eax
+ movl %eax, %ds
+ movl %eax, %es
+ movl %eax, %ss
+
+ xorl %eax, %eax
+ movl %eax, %gs
+
+ movl $(CPU_GDT_SELECTOR(CPU_GDT_CPU_IDX)), %eax
+ movl %eax, %fs
+
+ /* Alter the stack to reload the code segment using a far return */
+ popl %eax
+ pushl $(CPU_GDT_SELECTOR(CPU_GDT_CODE_IDX))
+ pushl %eax
+ lret
+END(cpu_load_gdt)
+
+/*
+ * TODO: traps handling.
+ */
+ENTRY(cpu_trap_default)
+ iret
+END(cpu_trap_default)
+
+ENTRY(cpu_trap_lapic_timer_intr)
+ call lapic_timer_intr
+ iret
+END(cpu_trap_lapic_timer_intr)
+
+ENTRY(cpu_trap_lapic_spurious_intr)
+ iret
+END(cpu_trap_lapic_spurious_intr)