diff options
Diffstat (limited to 'src/hw/pic.h')
| -rw-r--r-- | src/hw/pic.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/hw/pic.h b/src/hw/pic.h new file mode 100644 index 00000000..19aecba3 --- /dev/null +++ b/src/hw/pic.h @@ -0,0 +1,52 @@ +// Helpers for working with i8259 interrupt controller. +// +// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net> +// Copyright (C) 2002 MandrakeSoft S.A. +// +// This file may be distributed under the terms of the GNU LGPLv3 license. +#ifndef __PIC_H +#define __PIC_H + +#include "ioport.h" // PORT_PIC* +#include "farptr.h" // struct segoff_s + +// PORT_PIC1 bitdefs +#define PIC1_IRQ0 (1<<0) +#define PIC1_IRQ1 (1<<1) +#define PIC1_IRQ2 (1<<2) +#define PIC1_IRQ5 (1<<5) +#define PIC1_IRQ6 (1<<6) +// PORT_PIC2 bitdefs +#define PIC2_IRQ8 (1<<8) +#define PIC2_IRQ12 (1<<12) +#define PIC2_IRQ13 (1<<13) +#define PIC2_IRQ14 (1<<14) + +#define PIC_IRQMASK_DEFAULT ((u16)~PIC1_IRQ2) + +#define BIOS_HWIRQ0_VECTOR 0x08 +#define BIOS_HWIRQ8_VECTOR 0x70 + +static inline void +pic_eoi1(void) +{ + // Send eoi (select OCW2 + eoi) + outb(0x20, PORT_PIC1_CMD); +} + +static inline void +pic_eoi2(void) +{ + // Send eoi (select OCW2 + eoi) + outb(0x20, PORT_PIC2_CMD); + pic_eoi1(); +} + +u16 pic_irqmask_read(void); +void pic_irqmask_write(u16 mask); +void pic_irqmask_mask(u16 off, u16 on); +void pic_reset(u8 irq0, u8 irq8); +void pic_setup(void); +void enable_hwirq(int hwirq, struct segoff_s func); + +#endif // pic.h |