| /* |
| * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #ifndef __ASM_IRQFLAGS_ARCV2_H |
| #define __ASM_IRQFLAGS_ARCV2_H |
| |
| #include <asm/arcregs.h> |
| |
| /* status32 Bits */ |
| #define STATUS_AD_BIT 19 /* Disable Align chk: core supports non-aligned */ |
| #define STATUS_IE_BIT 31 |
| |
| #define STATUS_AD_MASK (1<<STATUS_AD_BIT) |
| #define STATUS_IE_MASK (1<<STATUS_IE_BIT) |
| |
| #define AUX_USER_SP 0x00D |
| #define AUX_IRQ_CTRL 0x00E |
| #define AUX_IRQ_ACT 0x043 /* Active Intr across all levels */ |
| #define AUX_IRQ_LVL_PEND 0x200 /* Pending Intr across all levels */ |
| #define AUX_IRQ_HINT 0x201 /* For generating Soft Interrupts */ |
| #define AUX_IRQ_PRIORITY 0x206 |
| #define ICAUSE 0x40a |
| #define AUX_IRQ_SELECT 0x40b |
| #define AUX_IRQ_ENABLE 0x40c |
| |
| /* Was Intr taken in User Mode */ |
| #define AUX_IRQ_ACT_BIT_U 31 |
| |
| /* |
| * User space should be interruptable even by lowest prio interrupt |
| * Safe even if actual interrupt priorities is fewer or even one |
| */ |
| #define ARCV2_IRQ_DEF_PRIO 15 |
| |
| /* seed value for status register */ |
| #define ISA_INIT_STATUS_BITS (STATUS_IE_MASK | STATUS_AD_MASK | \ |
| (ARCV2_IRQ_DEF_PRIO << 1)) |
| |
| /* SLEEP needs default irq priority (<=) which can interrupt the doze */ |
| #define ISA_SLEEP_ARG (0x10 | ARCV2_IRQ_DEF_PRIO) |
| |
| #ifndef __ASSEMBLY__ |
| |
| /* |
| * Save IRQ state and disable IRQs |
| */ |
| static inline long arch_local_irq_save(void) |
| { |
| unsigned long flags; |
| |
| __asm__ __volatile__(" clri %0 \n" : "=r" (flags) : : "memory"); |
| |
| return flags; |
| } |
| |
| /* |
| * restore saved IRQ state |
| */ |
| static inline void arch_local_irq_restore(unsigned long flags) |
| { |
| __asm__ __volatile__(" seti %0 \n" : : "r" (flags) : "memory"); |
| } |
| |
| /* |
| * Unconditionally Enable IRQs |
| */ |
| static inline void arch_local_irq_enable(void) |
| { |
| unsigned int irqact = read_aux_reg(AUX_IRQ_ACT); |
| |
| if (irqact & 0xffff) |
| write_aux_reg(AUX_IRQ_ACT, irqact & ~0xffff); |
| |
| __asm__ __volatile__(" seti \n" : : : "memory"); |
| } |
| |
| /* |
| * Unconditionally Disable IRQs |
| */ |
| static inline void arch_local_irq_disable(void) |
| { |
| __asm__ __volatile__(" clri \n" : : : "memory"); |
| } |
| |
| /* |
| * save IRQ state |
| */ |
| static inline long arch_local_save_flags(void) |
| { |
| unsigned long temp; |
| |
| __asm__ __volatile__( |
| " lr %0, [status32] \n" |
| : "=&r"(temp) |
| : |
| : "memory"); |
| |
| return temp; |
| } |
| |
| /* |
| * Query IRQ state |
| */ |
| static inline int arch_irqs_disabled_flags(unsigned long flags) |
| { |
| return !(flags & (STATUS_IE_MASK)); |
| } |
| |
| static inline int arch_irqs_disabled(void) |
| { |
| return arch_irqs_disabled_flags(arch_local_save_flags()); |
| } |
| |
| static inline void arc_softirq_trigger(int irq) |
| { |
| write_aux_reg(AUX_IRQ_HINT, irq); |
| } |
| |
| static inline void arc_softirq_clear(int irq) |
| { |
| write_aux_reg(AUX_IRQ_HINT, 0); |
| } |
| |
| #else |
| |
| .macro IRQ_DISABLE scratch |
| clri |
| .endm |
| |
| .macro IRQ_ENABLE scratch |
| seti |
| .endm |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| #endif |