| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 Regents of the University of California |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation, version 2. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
| 13 | |
| 14 | |
| 15 | #ifndef _ASM_RISCV_IRQFLAGS_H |
| 16 | #define _ASM_RISCV_IRQFLAGS_H |
| 17 | |
| 18 | #include <asm/processor.h> |
| 19 | #include <asm/csr.h> |
| 20 | |
| 21 | /* read interrupt enabled status */ |
| 22 | static inline unsigned long arch_local_save_flags(void) |
| 23 | { |
| 24 | return csr_read(sstatus); |
| 25 | } |
| 26 | |
| 27 | /* unconditionally enable interrupts */ |
| 28 | static inline void arch_local_irq_enable(void) |
| 29 | { |
| 30 | csr_set(sstatus, SR_SIE); |
| 31 | } |
| 32 | |
| 33 | /* unconditionally disable interrupts */ |
| 34 | static inline void arch_local_irq_disable(void) |
| 35 | { |
| 36 | csr_clear(sstatus, SR_SIE); |
| 37 | } |
| 38 | |
| 39 | /* get status and disable interrupts */ |
| 40 | static inline unsigned long arch_local_irq_save(void) |
| 41 | { |
| 42 | return csr_read_clear(sstatus, SR_SIE); |
| 43 | } |
| 44 | |
| 45 | /* test flags */ |
| 46 | static inline int arch_irqs_disabled_flags(unsigned long flags) |
| 47 | { |
| 48 | return !(flags & SR_SIE); |
| 49 | } |
| 50 | |
| 51 | /* test hardware interrupt enable bit */ |
| 52 | static inline int arch_irqs_disabled(void) |
| 53 | { |
| 54 | return arch_irqs_disabled_flags(arch_local_save_flags()); |
| 55 | } |
| 56 | |
| 57 | /* set interrupt enabled status */ |
| 58 | static inline void arch_local_irq_restore(unsigned long flags) |
| 59 | { |
| 60 | csr_set(sstatus, flags & SR_SIE); |
| 61 | } |
| 62 | |
| 63 | #endif /* _ASM_RISCV_IRQFLAGS_H */ |