LXR uboot/arch/x86/include/asm/ioapic.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * From coreboot file of the same name
   4 *
   5 * Copyright (C) 2010 coresystems GmbH
   6 */
   7
   8#ifndef __ASM_IOAPIC_H
   9#define __ASM_IOAPIC_H
  10
  11#define IO_APIC_ADDR            0xfec00000
  12
  13/* Direct addressed register */
  14#define IO_APIC_INDEX           (IO_APIC_ADDR + 0x00)
  15#define IO_APIC_DATA            (IO_APIC_ADDR + 0x10)
  16
  17/* Indirect addressed register offset */
  18#define IO_APIC_ID              0x00
  19#define IO_APIC_VER             0x01
  20
  21/**
  22 * io_apic_read() - Read I/O APIC register
  23 *
  24 * This routine reads I/O APIC indirect addressed register.
  25 *
  26 * @reg:        address of indirect addressed register
  27 * @return:     register value to read
  28 */
  29u32 io_apic_read(u32 reg);
  30
  31/**
  32 * io_apic_write() - Write I/O APIC register
  33 *
  34 * This routine writes I/O APIC indirect addressed register.
  35 *
  36 * @reg:        address of indirect addressed register
  37 * @val:        register value to write
  38 */
  39void io_apic_write(u32 reg, u32 val);
  40
  41void io_apic_set_id(int ioapic_id);
  42
  43#endif
  44