// 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.
#include "pic.h" // get_pic1_isr
#include "util.h" // dprintf
#include "config.h" // CONFIG_*
void
-pic_setup()
+set_pics(u8 irq0, u8 irq8)
{
- 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, 0x70-0x77 for irq8-15)
- outb(0x08, PORT_PIC1_DATA);
- outb(0x70, PORT_PIC2_DATA);
+ outb(irq0, PORT_PIC1_DATA);
+ outb(irq8, PORT_PIC2_DATA);
// Send ICW3 (cascaded pic ids)
outb(0x04, PORT_PIC1_DATA);
outb(0x02, PORT_PIC2_DATA);
outb(~0, PORT_PIC2_DATA);
}
+void
+pic_setup(void)
+{
+ dprintf(3, "init pic\n");
+ set_pics(0x08, 0x70);
+}
+
// Handler for otherwise unused hardware irqs.
void VISIBLE16
-handle_hwirq(struct bregs *regs)
+handle_hwpic1(struct bregs *regs)
{
- debug_isr(DEBUG_ISR_hwirq);
-
- u8 isr1 = get_pic1_isr();
- if (! isr1) {
- dprintf(1, "Got hwirq with no ISR\n");
- return;
- }
+ dprintf(DEBUG_ISR_hwpic1, "handle_hwpic1 irq=%x\n", get_pic1_isr());
+ eoi_pic1();
+}
- u8 isr2 = get_pic2_isr();
- u16 isr = isr2<<8 | isr1;
- dprintf(1, "Masking noisy irq %x\n", isr);
- if (isr2) {
- mask_pic2(isr2);
- eoi_pic2();
- } else {
- if (! (isr1 & 0x2)) // don't ever mask the cascaded irq
- mask_pic1(isr1);
- eoi_pic1();
- }
+void VISIBLE16
+handle_hwpic2(struct bregs *regs)
+{
+ dprintf(DEBUG_ISR_hwpic2, "handle_hwpic2 irq=%x\n", get_pic2_isr());
+ eoi_pic2();
}