diff options
Diffstat (limited to 'arch/nios2/include/asm/system.h')
| -rw-r--r-- | arch/nios2/include/asm/system.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/nios2/include/asm/system.h b/arch/nios2/include/asm/system.h new file mode 100644 index 0000000000..bb03ca5316 --- /dev/null +++ b/arch/nios2/include/asm/system.h @@ -0,0 +1,59 @@ +/* + * (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 __ASM_NIOS2_SYSTEM_H_ +#define __ASM_NIOS2_SYSTEM_H_ + +#define local_irq_enable() __asm__ __volatile__ ( \ + "rdctl r8, status\n" \ + "ori r8, r8, 1\n" \ + "wrctl status, r8\n" \ + : : : "r8") + +#define local_irq_disable() __asm__ __volatile__ ( \ + "rdctl r8, status\n" \ + "andi r8, r8, 0xfffe\n" \ + "wrctl status, r8\n" \ + : : : "r8") + +#define local_save_flags(x) __asm__ __volatile__ ( \ + "rdctl r8, status\n" \ + "mov %0, r8\n" \ + : "=r" (x) : : "r8", "memory") + +#define local_irq_restore(x) __asm__ __volatile__ ( \ + "mov r8, %0\n" \ + "wrctl status, r8\n" \ + : : "r" (x) : "r8", "memory") + +/* For spinlocks etc */ +#define local_irq_save(x) do { local_save_flags(x); local_irq_disable(); } \ + while (0) + +#define irqs_disabled() \ +({ \ + unsigned long flags; \ + local_save_flags(flags); \ + ((flags & NIOS2_STATUS_PIE_MSK) == 0x0); \ +}) + +#endif /* __ASM_NIOS2_SYSTEM_H */ |