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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | /* * 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_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 /* 0 is highest level, but taken by FIRQs, if present in design */ #define ARCV2_IRQ_DEF_PRIO 0 /* seed value for status register */ #define ISA_INIT_STATUS_BITS (STATUS_IE_MASK | STATUS_AD_MASK | \ (ARCV2_IRQ_DEF_PRIO << 1)) #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()); } #else .macro IRQ_DISABLE scratch clri .endm .macro IRQ_ENABLE scratch seti .endm #endif /* __ASSEMBLY__ */ #endif |