| Macpaul Lin | 00f892f | 2011-10-11 22:33:15 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 Andes Technology Corporation |
| 3 | * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.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., 51 Franklin St, Fifth Floor, Boston, |
| 21 | * MA 02110-1301 USA |
| 22 | */ |
| 23 | |
| 24 | #ifndef __ASM_NDS_SYSTEM_H |
| 25 | #define __ASM_NDS_SYSTEM_H |
| 26 | |
| 27 | /* |
| 28 | * Interrupt configuring macros. |
| 29 | */ |
| 30 | |
| 31 | extern int irq_flags; |
| 32 | |
| 33 | #define local_irq_enable() \ |
| 34 | __asm__ __volatile__ ( \ |
| 35 | "mfsr %0, $psw\n\t" \ |
| 36 | "andi %0, %0, 0x1\n\t" \ |
| 37 | "setgie.e\n\t" \ |
| 38 | : \ |
| 39 | : "r" (irq_flags) \ |
| 40 | ) |
| 41 | |
| 42 | #define local_irq_disable() \ |
| 43 | do { \ |
| 44 | int __tmp_dummy; \ |
| 45 | __asm__ __volatile__ ( \ |
| 46 | "mfsr %0, $psw\n\t" \ |
| 47 | "andi %0, %0, 0x1\n\t" \ |
| 48 | "setgie.d\n\t" \ |
| 49 | "dsb\n\t" \ |
| 50 | : "=r" (__tmp_dummy) \ |
| 51 | ); \ |
| 52 | } while (0) |
| 53 | |
| 54 | #define local_irq_save(x) \ |
| 55 | __asm__ __volatile__ ( \ |
| 56 | "mfsr %0, $psw\n\t" \ |
| 57 | "andi %0, %0, 0x1\n\t" \ |
| 58 | "setgie.d\n\t" \ |
| 59 | "dsb\n\t" \ |
| 60 | : "=&r" (x) \ |
| 61 | ) |
| 62 | |
| 63 | #define local_save_flags(x) \ |
| 64 | __asm__ __volatile__ ( \ |
| 65 | "mfsr %0, $psw\n\t" \ |
| 66 | "andi %0, %0, 0x1\n\t" \ |
| 67 | "setgie.e\n\t" \ |
| 68 | "setgie.d\n\t" \ |
| 69 | : "=r" (x) \ |
| 70 | ) |
| 71 | |
| 72 | #define irqs_enabled_from_flags(x) ((x) != 0x1f) |
| 73 | |
| 74 | #define local_irq_restore(x) \ |
| 75 | do { \ |
| 76 | if (irqs_enabled_from_flags(x)) \ |
| 77 | local_irq_enable(); \ |
| 78 | } while (0) |
| 79 | |
| 80 | /* |
| 81 | * Force strict CPU ordering. |
| 82 | */ |
| 83 | #define nop() asm volatile ("nop;\n\t" : : ) |
| 84 | #define mb() asm volatile ("" : : : "memory") |
| 85 | #define rmb() asm volatile ("" : : : "memory") |
| 86 | #define wmb() asm volatile ("" : : : "memory") |
| 87 | |
| 88 | #endif /* __ASM_NDS_SYSTEM_H */ |