2 * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 #ifndef __ASM_IRQFLAGS_ARCV2_H
10 #define __ASM_IRQFLAGS_ARCV2_H
12 #include <asm/arcregs.h>
15 #define STATUS_AD_BIT 19 /* Disable Align chk: core supports non-aligned */
16 #define STATUS_IE_BIT 31
18 #define STATUS_AD_MASK (1<<STATUS_AD_BIT)
19 #define STATUS_IE_MASK (1<<STATUS_IE_BIT)
21 #define AUX_USER_SP 0x00D
22 #define AUX_IRQ_CTRL 0x00E
23 #define AUX_IRQ_ACT 0x043 /* Active Intr across all levels */
24 #define AUX_IRQ_LVL_PEND 0x200 /* Pending Intr across all levels */
25 #define AUX_IRQ_PRIORITY 0x206
27 #define AUX_IRQ_SELECT 0x40b
28 #define AUX_IRQ_ENABLE 0x40c
30 /* Was Intr taken in User Mode */
31 #define AUX_IRQ_ACT_BIT_U 31
34 * User space should be interruptable even by lowest prio interrupt
35 * Safe even if actual interrupt priorities is fewer or even one
37 #define ARCV2_IRQ_DEF_PRIO 15
39 /* seed value for status register */
40 #define ISA_INIT_STATUS_BITS (STATUS_IE_MASK | STATUS_AD_MASK | \
41 (ARCV2_IRQ_DEF_PRIO << 1))
43 /* SLEEP needs default irq priority (<=) which can interrupt the doze */
44 #define ISA_SLEEP_ARG (0x10 | ARCV2_IRQ_DEF_PRIO)
49 * Save IRQ state and disable IRQs
51 static inline long arch_local_irq_save(void)
55 __asm__ __volatile__(" clri %0 \n" : "=r" (flags) : : "memory");
61 * restore saved IRQ state
63 static inline void arch_local_irq_restore(unsigned long flags)
65 __asm__ __volatile__(" seti %0 \n" : : "r" (flags) : "memory");
69 * Unconditionally Enable IRQs
71 static inline void arch_local_irq_enable(void)
73 unsigned int irqact = read_aux_reg(AUX_IRQ_ACT);
76 write_aux_reg(AUX_IRQ_ACT, irqact & ~0xffff);
78 __asm__ __volatile__(" seti \n" : : : "memory");
82 * Unconditionally Disable IRQs
84 static inline void arch_local_irq_disable(void)
86 __asm__ __volatile__(" clri \n" : : : "memory");
92 static inline long arch_local_save_flags(void)
97 " lr %0, [status32] \n"
108 static inline int arch_irqs_disabled_flags(unsigned long flags)
110 return !(flags & (STATUS_IE_MASK));
113 static inline int arch_irqs_disabled(void)
115 return arch_irqs_disabled_flags(arch_local_save_flags());
120 .macro IRQ_DISABLE scratch
124 .macro IRQ_ENABLE scratch
128 #endif /* __ASSEMBLY__ */