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