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Diffstat (limited to 'sysdeps/standalone/m68k/m68020/m68020.h')
-rw-r--r-- | sysdeps/standalone/m68k/m68020/m68020.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/sysdeps/standalone/m68k/m68020/m68020.h b/sysdeps/standalone/m68k/m68020/m68020.h new file mode 100644 index 0000000000..e9e6f7d875 --- /dev/null +++ b/sysdeps/standalone/m68k/m68020/m68020.h @@ -0,0 +1,88 @@ +/* Copyright (C) 1994 Free Software Foundation, Inc. + Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil), + On-Line Applications Research Corporation. + +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +/* m68020.h + * + * This file contains macros which are used to access MC68020 + * registers which are not addressable by C. These are + * useful when developing the board specific support. + */ + +#ifndef m68020_h__ +#define m68020_h__ + +typedef void ( *mc68020_isr )( void ); + +#define disable_intr( level ) \ + { (level) = 0; \ + asm volatile ( "movew %%sr,%0 ; \ + orw #0x0700,%%sr" \ + : "=d" ((level)) : "0" ((level)) ); \ + } + +#define enable_intr( level ) \ + { asm volatile ( "movew %0,%%sr " \ + : "=d" ((level)) : "0" ((level)) ); \ + } + +#define flash_intr( level ) \ + { asm volatile ( "movew %0,%%sr ; \ + orw #0x0700,%%sr" \ + : "=d" ((level)) : "0" ((level)) ); \ + } + +#define get_vbr( vbr ) \ + { (vbr) = 0; \ + asm volatile ( "movec %%vbr,%0 " \ + : "=a" (vbr) : "0" (vbr) ); \ + } + +#define set_vbr( vbr ) \ + { register mc68020_isr *_vbr= (mc68020_isr *)(vbr); \ + asm volatile ( "movec %0,%%vbr " \ + : "=a" (_vbr) : "0" (_vbr) ); \ + } + +#define enable_caching() \ + { register unsigned int _ctl=0x01; \ + asm volatile ( "movec %0,%%cacr" \ + : "=d" (_ctl) : "0" (_ctl) ); \ + } + +#define delay( microseconds ) \ + { register unsigned int _delay=(microseconds); \ + register unsigned int _tmp=123; \ + asm volatile( "0: \ + nbcd %0 ; \ + nbcd %0 ; \ + dbf %1,0 " \ + : "=d" (_tmp), "=d" (_delay) \ + : "0" (_tmp), "1" (_delay) ); \ + } + +#define enable_tracing() +#define cause_intr( X ) +#define clear_intr( X ) + +extern mc68020_isr M68Kvec[]; /* vector table address */ + +#endif +/* end of include file */ |