mn10300: add the MN10300/AM33 architecture to the kernel

Add architecture support for the MN10300/AM33 CPUs produced by MEI to the
kernel.

This patch also adds board support for the ASB2303 with the ASB2308 daughter
board, and the ASB2305.  The only processor supported is the MN103E010, which
is an AM33v2 core plus on-chip devices.

[akpm@linux-foundation.org: nuke cvs control strings]
Signed-off-by: Masakazu Urade <urade.masakazu@jp.panasonic.com>
Signed-off-by: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 85 insertions, 0 deletions

diff --git a/include/asm-mn10300/fpu.h b/include/asm-mn10300/fpu.h
new file mode 100644
index 000000000000..64a2b83a7a6a
--- /dev/null
+++ b/include/asm-mn10300/fpu.h
@@ -0,0 +1,85 @@
+/* MN10300 FPU definitions
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ * Derived from include/asm-i386/i387.h: Copyright (C) 1994 Linus Torvalds
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef _ASM_FPU_H
+#define _ASM_FPU_H
+
+#include <asm/processor.h>
+#include <asm/sigcontext.h>
+#include <asm/user.h>
+
+#ifdef __KERNEL__
+
+/* the task that owns the FPU state */
+extern struct task_struct *fpu_state_owner;
+
+#define set_using_fpu(tsk)                              \
+do {                                                    \
+        (tsk)->thread.fpu_flags |= THREAD_USING_FPU;    \
+} while (0)
+
+#define clear_using_fpu(tsk)                            \
+do {                                                    \
+        (tsk)->thread.fpu_flags &= ~THREAD_USING_FPU;   \
+} while (0)
+
+#define is_using_fpu(tsk) ((tsk)->thread.fpu_flags & THREAD_USING_FPU)
+
+#define unlazy_fpu(tsk)                                 \
+do {                                                    \
+        preempt_disable();                              \
+        if (fpu_state_owner == (tsk))                   \
+                fpu_save(&tsk->thread.fpu_state);       \
+        preempt_enable();                               \
+} while (0)
+
+#define exit_fpu()                              \
+do {                                            \
+        struct task_struct *__tsk = current;    \
+        preempt_disable();                      \
+        if (fpu_state_owner == __tsk)           \
+                fpu_state_owner = NULL;         \
+        preempt_enable();                       \
+} while (0)
+
+#define flush_fpu()                                     \
+do {                                                    \
+        struct task_struct *__tsk = current;            \
+        preempt_disable();                              \
+        if (fpu_state_owner == __tsk) {                 \
+                fpu_state_owner = NULL;                 \
+                __tsk->thread.uregs->epsw &= ~EPSW_FE;  \
+        }                                               \
+        preempt_enable();                               \
+        clear_using_fpu(__tsk);                         \
+} while (0)
+
+extern asmlinkage void fpu_init_state(void);
+extern asmlinkage void fpu_kill_state(struct task_struct *);
+extern asmlinkage void fpu_disabled(struct pt_regs *, enum exception_code);
+extern asmlinkage void fpu_exception(struct pt_regs *, enum exception_code);
+
+#ifdef CONFIG_FPU
+extern asmlinkage void fpu_save(struct fpu_state_struct *);
+extern asmlinkage void fpu_restore(struct fpu_state_struct *);
+#else
+#define fpu_save(a)
+#define fpu_restore(a)
+#endif /* CONFIG_FPU  */
+
+/*
+ * signal frame handlers
+ */
+extern int fpu_setup_sigcontext(struct fpucontext *buf);
+extern int fpu_restore_sigcontext(struct fpucontext *buf);
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_FPU_H */