projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 820970a5 VG |
1 | /* |
| 2 | * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com) | |
| 3 | * | |
| 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. | |
| 7 | */ | |
| 8 | ||
| 9 | #ifndef __ASM_IRQFLAGS_ARCV2_H | |
| 10 | #define __ASM_IRQFLAGS_ARCV2_H | |
| 11 | ||
| 12 | #include <asm/arcregs.h> | |
| 13 | ||
| 14 | /* status32 Bits */ | |
| 15 | #define STATUS_AD_BIT 19 /* Disable Align chk: core supports non-aligned */ | |
| 16 | #define STATUS_IE_BIT 31 | |
| 17 | ||
| 18 | #define STATUS_AD_MASK (1<<STATUS_AD_BIT) | |
| 19 | #define STATUS_IE_MASK (1<<STATUS_IE_BIT) | |
| 20 | ||
| 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 | |
| 26 | #define ICAUSE 0x40a | |
| 27 | #define AUX_IRQ_SELECT 0x40b | |
| 28 | #define AUX_IRQ_ENABLE 0x40c | |
| 29 | ||
| 1f6ccfff VG |
30 | /* Was Intr taken in User Mode */ |
| 31 | #define AUX_IRQ_ACT_BIT_U 31 | |
| 32 | ||
| 820970a5 VG |
33 | /* 0 is highest level, but taken by FIRQs, if present in design */ |
| 34 | #define ARCV2_IRQ_DEF_PRIO 0 | |
| 35 | ||
| 36 | /* seed value for status register */ | |
| 37 | #define ISA_INIT_STATUS_BITS (STATUS_IE_MASK | STATUS_AD_MASK | \ | |
| 38 | (ARCV2_IRQ_DEF_PRIO << 1)) | |
| 39 | ||
| 512b5b89 VG |
40 | #define ISA_SLEEP_ARG 0x10 |
| 41 | ||
| 820970a5 VG |
42 | #ifndef __ASSEMBLY__ |
| 43 | ||
| 44 | /* | |
| 45 | * Save IRQ state and disable IRQs | |
| 46 | */ | |
| 47 | static inline long arch_local_irq_save(void) | |
| 48 | { | |
| 49 | unsigned long flags; | |
| 50 | ||
| 51 | __asm__ __volatile__(" clri %0 \n" : "=r" (flags) : : "memory"); | |
| 52 | ||
| 53 | return flags; | |
| 54 | } | |
| 55 | ||
| 56 | /* | |
| 57 | * restore saved IRQ state | |
| 58 | */ | |
| 59 | static inline void arch_local_irq_restore(unsigned long flags) | |
| 60 | { | |
| 61 | __asm__ __volatile__(" seti %0 \n" : : "r" (flags) : "memory"); | |
| 62 | } | |
| 63 | ||
| 64 | /* | |
| 65 | * Unconditionally Enable IRQs | |
| 66 | */ | |
| 67 | static inline void arch_local_irq_enable(void) | |
| 68 | { | |
| 4de0e528 VG |
69 | unsigned int irqact = read_aux_reg(AUX_IRQ_ACT); |
| 70 | ||
| 71 | if (irqact & 0xffff) | |
| 72 | write_aux_reg(AUX_IRQ_ACT, irqact & ~0xffff); | |
| 73 | ||
| 820970a5 VG |
74 | __asm__ __volatile__(" seti \n" : : : "memory"); |
| 75 | } | |
| 76 | ||
| 77 | /* | |
| 78 | * Unconditionally Disable IRQs | |
| 79 | */ | |
| 80 | static inline void arch_local_irq_disable(void) | |
| 81 | { | |
| 82 | __asm__ __volatile__(" clri \n" : : : "memory"); | |
| 83 | } | |
| 84 | ||
| 85 | /* | |
| 86 | * save IRQ state | |
| 87 | */ | |
| 88 | static inline long arch_local_save_flags(void) | |
| 89 | { | |
| 90 | unsigned long temp; | |
| 91 | ||
| 92 | __asm__ __volatile__( | |
| 93 | " lr %0, [status32] \n" | |
| 94 | : "=&r"(temp) | |
| 95 | : | |
| 96 | : "memory"); | |
| 97 | ||
| 98 | return temp; | |
| 99 | } | |
| 100 | ||
| 101 | /* | |
| 102 | * Query IRQ state | |
| 103 | */ | |
| 104 | static inline int arch_irqs_disabled_flags(unsigned long flags) | |
| 105 | { | |
| 106 | return !(flags & (STATUS_IE_MASK)); | |
| 107 | } | |
| 108 | ||
| 109 | static inline int arch_irqs_disabled(void) | |
| 110 | { | |
| 111 | return arch_irqs_disabled_flags(arch_local_save_flags()); | |
| 112 | } | |
| 113 | ||
| 114 | #else | |
| 115 | ||
| 116 | .macro IRQ_DISABLE scratch | |
| 117 | clri | |
| 118 | .endm | |
| 119 | ||
| 120 | .macro IRQ_ENABLE scratch | |
| 121 | seti | |
| 122 | .endm | |
| 123 | ||
| 124 | #endif /* __ASSEMBLY__ */ | |
| 125 | ||
| 126 | #endif |