+++ /dev/null
-/*
- Interface for IRQ routines on DOS
- Copyright (C) 1999 by Andrew Zabolotny, <bit@eltech.ru>
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-#ifndef __DOSIRQ_H__
-#define __DOSIRQ_H__
-
-#include <pc.h>
-
-#define PIC1_BASE 0x20 /* PIC1 base */
-#define PIC2_BASE 0xA0 /* PIC2 base */
-
-struct irq_handle {
- void (*c_handler) (); /* The real interrupt handler */
- unsigned long handler_size; /* The size of interrupt handler */
- unsigned long handler; /* Interrupt wrapper address */
- unsigned long prev_selector; /* Selector of previous handler */
- unsigned long prev_offset; /* Offset of previous handler */
- unsigned char irq_num; /* IRQ number */
- unsigned char int_num; /* Interrupt number */
- unsigned char pic_base; /* PIC base (0x20 or 0xA0) */
- unsigned char pic_mask; /* Old PIC mask state */
-};
-
-/* Return the enabled state for specific IRQ */
-static inline unsigned char irq_state(struct irq_handle * irq)
-{
- return ((~inportb(irq->pic_base + 1)) & (0x01 << (irq->irq_num & 7)));
-}
-
-/* Acknowledge the end of interrupt */
-static inline void _irq_ack(int irqno)
-{
- outportb(irqno > 7 ? PIC2_BASE : PIC1_BASE, 0x60 | (irqno & 7));
- /* For second controller we also should acknowledge first controller */
- if (irqno > 7)
- outportb(PIC1_BASE, 0x20); /* 0x20, 0x62? */
-}
-
-/* Acknowledge the end of interrupt */
-static inline void irq_ack(struct irq_handle * irq)
-{
- outportb(irq->pic_base, 0x60 | (irq->irq_num & 7));
- /* For second controller we also should acknowledge first controller */
- if (irq->pic_base != PIC1_BASE)
- outportb(PIC1_BASE, 0x20); /* 0x20, 0x62? */
-}
-
-/* Mask (disable) the particular IRQ given his ordinal */
-static inline void _irq_disable(int irqno)
-{
- unsigned int port_no = (irqno < 8 ? PIC1_BASE : PIC2_BASE) + 1;
- outportb(port_no, inportb(port_no) | (1 << (irqno & 7)));
-}
-
-/* Unmask (enable) the particular IRQ given its ordinal */
-static inline void _irq_enable(int irqno)
-{
- unsigned int port_no = (irqno < 8 ? PIC1_BASE : PIC2_BASE) + 1;
- outportb(port_no, inportb(port_no) & ~(1 << (irqno & 7)));
-}
-
-/* Mask (disable) the particular IRQ given its irq_handle structure */
-static inline void irq_disable(struct irq_handle * irq)
-{
- outportb(irq->pic_base + 1,
- inportb(irq->pic_base + 1) | (1 << (irq->irq_num & 7)));
-}
-
-/* Unmask (enable) the particular IRQ given its irq_handle structure */
-static inline void irq_enable(struct irq_handle * irq)
-{
- outportb(irq->pic_base + 1,
- inportb(irq->pic_base + 1) & ~(1 << (irq->irq_num & 7)));
-}
-
-/* Check if a specific IRQ is pending: return 0 is no */
-static inline int irq_check(struct irq_handle * irq)
-{
- outportb(irq->pic_base, 0x0B); /* Read IRR vector */
- return (inportb(irq->pic_base) & (1 << (irq->irq_num & 7)));
-}
-
-/* Hook a specific IRQ; NOTE: IRQ is disabled upon return, irq_enable() it */
-extern struct irq_handle *irq_hook(int irqno, void (*handler)(),
- unsigned long size);
-/* Unhook a previously hooked IRQ */
-extern void irq_unhook(struct irq_handle * irq);
-/* Start IRQ detection process (IRQ list is given with irq mask) */
-/* irq_confirm should return "1" if the IRQ really comes from the device */
-extern void irq_detect_start(unsigned int irqs,
- int (*irq_confirm) (int irqno));
-/* Finish IRQ detection process */
-extern void irq_detect_end();
-/* Get the count of specific irqno that happened */
-extern int irq_detect_get(int irqno, unsigned int *irqmask);
-/* Clear IRQ counters */
-extern void irq_detect_clear();
-
-/* The size of interrupt stack */
-extern unsigned int __irq_stack_size;
-/* The number of nested interrupts that can be handled */
-extern unsigned int __irq_stack_count;
-
-#endif /* __DOSIRQ_H__ */
-
-/* ex:set ts=4: */
projects / dosdemo / blobdiff