1 /* 2 * (C) Copyright 2004, Psyent Corporation <www.psyent.com> 3 * Scott McNutt <smcnutt@psyent.com> 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 #ifndef __ASM_NIOS2_SYSTEM_H_ 24 #define __ASM_NIOS2_SYSTEM_H_ 25 26 #define local_irq_enable() __asm__ __volatile__ ( \ 27 "rdctl r8, status\n" \ 28 "ori r8, r8, 1\n" \ 29 "wrctl status, r8\n" \ 30 : : : "r8") 31 32 #define local_irq_disable() __asm__ __volatile__ ( \ 33 "rdctl r8, status\n" \ 34 "andi r8, r8, 0xfffe\n" \ 35 "wrctl status, r8\n" \ 36 : : : "r8") 37 38 #define local_save_flags(x) __asm__ __volatile__ ( \ 39 "rdctl r8, status\n" \ 40 "mov %0, r8\n" \ 41 : "=r" (x) : : "r8", "memory") 42 43 #define local_irq_restore(x) __asm__ __volatile__ ( \ 44 "mov r8, %0\n" \ 45 "wrctl status, r8\n" \ 46 : : "r" (x) : "r8", "memory") 47 48 /* For spinlocks etc */ 49 #define local_irq_save(x) do { local_save_flags(x); local_irq_disable(); } \ 50 while (0) 51 52 #define irqs_disabled() \ 53 ({ \ 54 unsigned long flags; \ 55 local_save_flags(flags); \ 56 ((flags & NIOS2_STATUS_PIE_MSK) == 0x0); \ 57 }) 58 59 #endif /* __ASM_NIOS2_SYSTEM_H */ 60