Subversion Repositories or1k

/*

 * include/asm-sh/machvec_init.h

 *

 * Copyright 2000 Stuart Menefy (stuart.menefy@st.com)

 *

 * May be copied or modified under the terms of the GNU General Public

 * License.  See linux/COPYING for more information.

 *

 * This file has goodies to help simplify instantiation of machine vectors.

 */

#ifndef __SH_MACHVEC_INIT_H

#define __SH_MACHVEC_INIT_H

#include <linux/config.h>

/*

 * In a GENERIC kernel, we have lots of these vectors floating about,

 * all but one of which we want to go away.  In a non-GENERIC kernel,

 * we want only one, ever.

 *

 * Accomplish this in the GENERIC kernel by puting all of the vectors

 * in the .init.data section where they'll go away.  We'll copy the

 * one we want to the real alpha_mv vector in setup_arch.

 *

 * Accomplish this in a non-GENERIC kernel by ifdef'ing out all but

 * one of the vectors, which will not reside in .init.data.  We then

 * alias this one vector to alpha_mv, so no copy is needed.

 *

 * Upshot: set __initdata to nothing for non-GENERIC kernels.

 *

 * Note we do the same thing for the UNKNOWN kernel, as we need to write

 * to the machine vector while setting it up.

 */

#if defined(CONFIG_SH_GENERIC) || defined(CONFIG_SH_UNKNOWN)

#define __initmv __attribute__((unused,__section__ (".machvec.init")))

#define ALIAS_MV(x)

#else

#define __initmv

/* GCC actually has a syntax for defining aliases, but is under some

   delusion that you shouldn't be able to declare it extern somewhere

   else beforehand.  Fine.  We'll do it ourselves.  */

#if 0

#define ALIAS_MV(system) \

  struct sh_machine_vector sh_mv __attribute__((alias("mv_"#system)));

#else

#define ALIAS_MV(system) \

  asm(".global sh_mv\nsh_mv = mv_"#system );

#endif

#endif /* GENERIC */

#endif /* __SH_MACHVEC_INIT_H */