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Diffstat (limited to 'include/nios2.h')
| -rw-r--r-- | include/nios2.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/include/nios2.h b/include/nios2.h new file mode 100644 index 0000000000..54954e3f5a --- /dev/null +++ b/include/nios2.h @@ -0,0 +1,63 @@ +/* + * (C) Copyright 2004, Psyent Corporation <www.psyent.com> + * Scott McNutt <smcnutt@psyent.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef __NIOS2_H__ +#define __NIOS2_H__ + +/*------------------------------------------------------------------------ + * Control registers -- use with wrctl() & rdctl() + *----------------------------------------------------------------------*/ +#define CTL_STATUS 0 /* Processor status reg */ +#define CTL_ESTATUS 1 /* Exception status reg */ +#define CTL_BSTATUS 2 /* Break status reg */ +#define CTL_IENABLE 3 /* Interrut enable reg */ +#define CTL_IPENDING 4 /* Interrut pending reg */ + +/*------------------------------------------------------------------------ + * Access to control regs + *----------------------------------------------------------------------*/ +#define _str_(x) #x + +#define rdctl(reg)\ + ({unsigned int val;\ + asm volatile( "rdctl %0, ctl" _str_(reg)\ + : "=r" (val) ); val;}) + +#define wrctl(reg,val)\ + asm volatile( "wrctl ctl" _str_(reg) ",%0"\ + : : "r" (val)) + +/*------------------------------------------------------------------------ + * Control reg bit masks + *----------------------------------------------------------------------*/ +#define STATUS_IE (1<<0) /* Interrupt enable */ +#define STATUS_U (1<<1) /* User-mode */ + +/*------------------------------------------------------------------------ + * Bit-31 Cache bypass -- only valid for data access. When data cache + * is not implemented, bit 31 is ignored for compatibility. + *----------------------------------------------------------------------*/ +#define CACHE_BYPASS(a) ((a) | 0x80000000) +#define CACHE_NO_BYPASS(a) ((a) & ~0x80000000) + +#endif /* __NIOS2_H__ */ |
