- add room to the FPU context

arch/x86/include/asm/tasks_types.h

@@ -0,0 +1,67 @@
+/* 
+ * Copyright 2011 Stefan Lankes, Chair for Operating Systems,
+ *                               RWTH Aachen University
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This file is part of MetalSVM.
+ *
+ */
+
+#ifndef __ARCH_TASKS_TYPES__
+#define __ARCH_TASKS_TYPES__
+
+#include <metalsvm/stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+	long	cwd;
+	long	swd;
+	long	twd;
+	long	fip;
+	long	fcs;
+	long	foo;
+	long	fos;
+	long	st_space[20];
+	long	status;
+} i387_fsave_t;
+
+typedef struct i387_fxsave_struct {
+	unsigned short	cwd;
+	unsigned short	swd;
+	unsigned short	twd;
+	unsigned short	fop;
+	long	fip;
+	long	fcs;
+	long	foo;
+	long	fos;
+	long	mxcsr;
+	long	reserved;
+	long	st_space[32];
+	long	xmm_space[32];
+	long	padding[56];
+} i387_fxsave_t __attribute__ ((aligned (16)));
+
+union fpu_union {
+	i387_fsave_t	fsave;
+	i387_fxsave_t	fxsave;
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

include/metalsvm/tasks_types.h

@@ -33,6 +33,7 @@
 #include <metalsvm/vma.h>
 #include <metalsvm/spinlock_types.h>
 #include <metalsvm/mailbox_types.h>
+#include <asm/tasks_types.h>
 #include <asm/atomic.h>
 
 #ifdef __cplusplus
@@ -57,9 +58,9 @@ typedef struct task {
 	uint32_t                status;
 	/// Usage in number of pages
 	atomic_int32_t   	user_usage;
-  /// Avoids concurrent access to the page directory
+	/// Avoids concurrent access to the page directory
 	spinlock_t		pgd_lock;	
-  /// pointer to the page directory
+	/// pointer to the page directory
 	struct page_dir*	pgd;            
 	/// Lock for the VMA_list
 	spinlock_t		vma_lock;
@@ -69,6 +70,8 @@ typedef struct task {
 	mailbox_wait_msg_t	inbox;	
 	/// Mail outbox array
 	mailbox_wait_msg_t*	outbox[MAX_TASKS];
+	/// FPU state
+	union fpu_union		fpu_state;
 } __attribute__((packed))  task_t;
 
 #ifdef __cplusplus