Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / seabios / src / hw / pic.h

diff --git a/qemu/roms/seabios/src/hw/pic.h b/qemu/roms/seabios/src/hw/pic.h
new file mode 100644 (file)
index 0000000..6947b6e
--- /dev/null
+++ b/qemu/roms/seabios/src/hw/pic.h
@@ -0,0 +1,56 @@
+// 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 "x86.h" // outb
+
+#define PORT_PIC1_CMD          0x0020
+#define PORT_PIC1_DATA         0x0021
+#define PORT_PIC2_CMD          0x00a0
+#define PORT_PIC2_DATA         0x00a1
+
+// 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