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Diffstat (limited to 'arch/nds32/include/asm/system.h')
| -rw-r--r-- | arch/nds32/include/asm/system.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/arch/nds32/include/asm/system.h b/arch/nds32/include/asm/system.h new file mode 100644 index 0000000000..97f59e9df2 --- /dev/null +++ b/arch/nds32/include/asm/system.h @@ -0,0 +1,88 @@ +/* + * Copyright (C) 2011 Andes Technology Corporation + * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.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., 51 Franklin St, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +#ifndef __ASM_NDS_SYSTEM_H +#define __ASM_NDS_SYSTEM_H + +/* + * Interrupt configuring macros. + */ + +extern int irq_flags; + +#define local_irq_enable() \ + __asm__ __volatile__ ( \ + "mfsr %0, $psw\n\t" \ + "andi %0, %0, 0x1\n\t" \ + "setgie.e\n\t" \ + : \ + : "r" (irq_flags) \ + ) + +#define local_irq_disable() \ + do { \ + int __tmp_dummy; \ + __asm__ __volatile__ ( \ + "mfsr %0, $psw\n\t" \ + "andi %0, %0, 0x1\n\t" \ + "setgie.d\n\t" \ + "dsb\n\t" \ + : "=r" (__tmp_dummy) \ + ); \ + } while (0) + +#define local_irq_save(x) \ + __asm__ __volatile__ ( \ + "mfsr %0, $psw\n\t" \ + "andi %0, %0, 0x1\n\t" \ + "setgie.d\n\t" \ + "dsb\n\t" \ + : "=&r" (x) \ + ) + +#define local_save_flags(x) \ + __asm__ __volatile__ ( \ + "mfsr %0, $psw\n\t" \ + "andi %0, %0, 0x1\n\t" \ + "setgie.e\n\t" \ + "setgie.d\n\t" \ + : "=r" (x) \ + ) + +#define irqs_enabled_from_flags(x) ((x) != 0x1f) + +#define local_irq_restore(x) \ + do { \ + if (irqs_enabled_from_flags(x)) \ + local_irq_enable(); \ + } while (0) + +/* + * Force strict CPU ordering. + */ +#define nop() asm volatile ("nop;\n\t" : : ) +#define mb() asm volatile ("" : : : "memory") +#define rmb() asm volatile ("" : : : "memory") +#define wmb() asm volatile ("" : : : "memory") + +#endif /* __ASM_NDS_SYSTEM_H */ |