/* * 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  /* * 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 */