// 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 GPLv3 license.
+// 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 "util.h" // dprintf
+#include "biosvar.h" // SET_IVT
// PORT_PIC1 bitdefs
#define PIC1_IRQ0 (1<<0)
#define PIC2_IRQ14 (1<<6)
static inline void
-eoi_pic1()
+eoi_pic1(void)
{
// Send eoi (select OCW2 + eoi)
outb(0x20, PORT_PIC1_CMD);
}
static inline void
-eoi_pic2()
+eoi_pic2(void)
{
// Send eoi (select OCW2 + eoi)
outb(0x20, PORT_PIC2_CMD);
outb(inb(PORT_PIC2_DATA) & ~irq, PORT_PIC2_DATA);
}
+static inline void
+mask_pic1(u8 irq)
+{
+ outb(inb(PORT_PIC1_DATA) | irq, PORT_PIC1_DATA);
+}
+
+static inline void
+mask_pic2(u8 irq)
+{
+ outb(inb(PORT_PIC2_DATA) | irq, PORT_PIC2_DATA);
+}
+
static inline u8
-get_pic1_isr()
+get_pic1_isr(void)
{
// 0x0b == select OCW1 + read ISR
outb(0x0b, PORT_PIC1_CMD);
return inb(PORT_PIC1_CMD);
}
+static inline u8
+get_pic2_isr(void)
+{
+ // 0x0b == select OCW1 + read ISR
+ outb(0x0b, PORT_PIC2_CMD);
+ return inb(PORT_PIC2_CMD);
+}
+
static inline void
-pic_setup()
+enable_hwirq(int hwirq, struct segoff_s func)
{
- dprintf(3, "init pic\n");
- // Send ICW1 (select OCW1 + will send ICW4)
- outb(0x11, PORT_PIC1_CMD);
- outb(0x11, PORT_PIC2_CMD);
- // Send ICW2 (base irqs: 0x08-0x0f for irq0-7, 0x70-0x78 for irq8-15)
- outb(0x08, PORT_PIC1_DATA);
- outb(0x70, PORT_PIC2_DATA);
- // Send ICW3 (cascaded pic ids)
- outb(0x04, PORT_PIC1_DATA);
- outb(0x02, PORT_PIC2_DATA);
- // Send ICW4 (enable 8086 mode)
- outb(0x01, PORT_PIC1_DATA);
- outb(0x01, PORT_PIC2_DATA);
- // Mask all irqs (except cascaded PIC2 irq)
- outb(~PIC1_IRQ2, PORT_PIC1_DATA);
- outb(~0, PORT_PIC2_DATA);
+ int vector;
+ if (hwirq < 8) {
+ unmask_pic1(1 << hwirq);
+ vector = 0x08 + hwirq;
+ } else {
+ unmask_pic2(1 << (hwirq - 8));
+ vector = 0x70 + hwirq - 8;
+ }
+ SET_IVT(vector, func);
}
+void set_pics(u8 irq0, u8 irq8);
+void pic_setup(void);
+
#endif // pic.h