aboutsummaryrefslogtreecommitdiff
path: root/include/asm-v850/current.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-v850/current.h')
-rw-r--r--include/asm-v850/current.h47
1 files changed, 47 insertions, 0 deletions
diff --git a/include/asm-v850/current.h b/include/asm-v850/current.h
new file mode 100644
index 00000000000..30aae567377
--- /dev/null
+++ b/include/asm-v850/current.h
@@ -0,0 +1,47 @@
+/*
+ * include/asm-v850/current.h -- Current task
+ *
+ * Copyright (C) 2001,02 NEC Corporation
+ * Copyright (C) 2001,02 Miles Bader <miles@gnu.org>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file COPYING in the main directory of this
+ * archive for more details.
+ *
+ * Written by Miles Bader <miles@gnu.org>
+ */
+
+#ifndef __V850_CURRENT_H__
+#define __V850_CURRENT_H__
+
+#ifndef __ASSEMBLY__ /* <linux/thread_info.h> is not asm-safe. */
+#include <linux/thread_info.h>
+#endif
+
+#include <asm/macrology.h>
+
+
+/* Register used to hold the current task pointer while in the kernel.
+ Any `call clobbered' register without a special meaning should be OK,
+ but check asm/v850/kernel/entry.S to be sure. */
+#define CURRENT_TASK_REGNUM 16
+#define CURRENT_TASK macrology_paste (r, CURRENT_TASK_REGNUM)
+
+
+#ifdef __ASSEMBLY__
+
+/* Put a pointer to the current task structure into REG. */
+#define GET_CURRENT_TASK(reg) \
+ GET_CURRENT_THREAD(reg); \
+ ld.w TI_TASK[reg], reg
+
+#else /* !__ASSEMBLY__ */
+
+/* A pointer to the current task. */
+register struct task_struct *current \
+ __asm__ (macrology_stringify (CURRENT_TASK));
+
+#endif /* __ASSEMBLY__ */
+
+
+#endif /* _V850_CURRENT_H */