Refactor BeRTOS to be in his own directory.

[bertos.git] / bertos / kern / switch_x86_64.s

diff --git a/bertos/kern/switch_x86_64.s b/bertos/kern/switch_x86_64.s
new file mode 100644 (file)
index 0000000..5fb4da6
--- /dev/null
+++ b/bertos/kern/switch_x86_64.s
@@ -0,0 +1,71 @@
+/*!
+ * \file
+ * <!--
+ * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
+ * Copyright 1999,2000,2001 Bernardo Innocenti <bernie@develer.com>
+ * This file is part of DevLib - See devlib/README for information.
+ * -->
+ *
+ * \brief i386 context switch
+ *
+ * \version $Id$
+ *
+ * \author Bernardo Innocenti <bernie@develer.com>
+ */
+
+/*
+ * $Log$
+ * Revision 1.4  2006/09/20 14:02:49  marco
+ * C-style comment.
+ *
+ * Revision 1.3  2006/02/24 01:35:40  bernie
+ * Update for new emulator.
+ *
+ * Revision 1.2  2006/02/24 01:17:05  bernie
+ * Update for new emulator.
+ *
+ * Revision 1.1  2005/11/27 03:06:15  bernie
+ * Add x86_64 task switching (to be updated to new-style scheduler).
+ *
+ * Revision 1.1  2005/11/14 21:06:38  bernie
+ * Add x86_64 support.
+ *
+ * Revision 1.2  2004/06/06 16:14:12  bernie
+ * Add DevLib license information.
+ *
+ * Revision 1.1  2004/05/23 17:27:00  bernie
+ * Import kern/ subdirectory.
+ *
+ */
+
+/* I know it's ugly... */
+/* .intel_syntax */
+
+/* void AsmSwitchContext(void **new_sp, void **save_sp) */
+/*                       %rdi           %rsi            */
+.globl asm_switch_context
+asm_switch_context:
+       pushq   %rax
+       pushq   %rbx
+       pushq   %rcx
+       pushq   %rdx
+       pushq   %rsi
+       pushq   %rdi
+       pushq   %rbp
+       movq    %rsp,(%rsi)             /* *save_sp = rsp */
+       movq    (%rdi),%rsp             /* rsp = *new_sp */
+       popq    %rbp
+       popq    %rdi
+       popq    %rsi
+       popq    %rdx
+       popq    %rcx
+       popq    %rbx
+       popq    %rax
+       ret
+
+/* int asm_switch_version(void) */
+.globl asm_switch_version
+asm_switch_version:
+       mov     $1,%rax
+       ret
+