89 lines
1.9 KiB
C
89 lines
1.9 KiB
C
/*
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* Copyright 2005-2009, Axel Dörfler, axeld@pinc-software.de.
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* Copyright 2012, Alex Smith, alex@alex-smith.me.uk.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _KERNEL_ARCH_x86_INT_H
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#define _KERNEL_ARCH_x86_INT_H
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#define ARCH_INTERRUPT_BASE 0x20
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#define NUM_IO_VECTORS (256 - ARCH_INTERRUPT_BASE)
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enum irq_source {
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IRQ_SOURCE_INVALID,
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IRQ_SOURCE_IOAPIC,
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IRQ_SOURCE_MSI,
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};
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static inline void
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arch_int_enable_interrupts_inline(void)
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{
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asm volatile("sti");
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}
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static inline int
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arch_int_disable_interrupts_inline(void)
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{
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size_t flags;
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asm volatile("pushf;\n"
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"pop %0;\n"
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"cli" : "=g" (flags));
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return (flags & 0x200) != 0;
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}
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static inline void
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arch_int_restore_interrupts_inline(int oldState)
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{
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if (oldState)
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asm("sti");
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}
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static inline bool
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arch_int_are_interrupts_enabled_inline(void)
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{
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size_t flags;
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asm volatile("pushf;\n"
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"pop %0;\n" : "=g" (flags));
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return (flags & 0x200) != 0;
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}
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// map the functions to the inline versions
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#define arch_int_enable_interrupts() arch_int_enable_interrupts_inline()
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#define arch_int_disable_interrupts() arch_int_disable_interrupts_inline()
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#define arch_int_restore_interrupts(status) \
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arch_int_restore_interrupts_inline(status)
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#define arch_int_are_interrupts_enabled() \
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arch_int_are_interrupts_enabled_inline()
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#ifdef __cplusplus
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typedef struct interrupt_controller_s {
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const char *name;
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void (*enable_io_interrupt)(int32 num);
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void (*disable_io_interrupt)(int32 num);
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void (*configure_io_interrupt)(int32 num, uint32 config);
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bool (*is_spurious_interrupt)(int32 num);
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bool (*is_level_triggered_interrupt)(int32 num);
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bool (*end_of_interrupt)(int32 num);
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void (*assign_interrupt_to_cpu)(int32 num, int32 cpu);
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} interrupt_controller;
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void x86_set_irq_source(int irq, irq_source source);
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void arch_int_set_interrupt_controller(const interrupt_controller &controller);
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#endif // __cplusplus
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#endif /* _KERNEL_ARCH_x86_INT_H */
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