1 /* 2 * From coreboot file of the same name 3 * 4 * Copyright (C) 2010 coresystems GmbH 5 * 6 * SPDX-License-Identifier: GPL-2.0 7 */ 8 9 #ifndef __ASM_IOAPIC_H 10 #define __ASM_IOAPIC_H 11 12 #define IO_APIC_ADDR 0xfec00000 13 14 /* Direct addressed register */ 15 #define IO_APIC_INDEX (IO_APIC_ADDR + 0x00) 16 #define IO_APIC_DATA (IO_APIC_ADDR + 0x10) 17 18 /* Indirect addressed register offset */ 19 #define IO_APIC_ID 0x00 20 #define IO_APIC_VER 0x01 21 22 /** 23 * io_apic_read() - Read I/O APIC register 24 * 25 * This routine reads I/O APIC indirect addressed register. 26 * 27 * @reg: address of indirect addressed register 28 * @return: register value to read 29 */ 30 u32 io_apic_read(u32 reg); 31 32 /** 33 * io_apic_write() - Write I/O APIC register 34 * 35 * This routine writes I/O APIC indirect addressed register. 36 * 37 * @reg: address of indirect addressed register 38 * @val: register value to write 39 */ 40 void io_apic_write(u32 reg, u32 val); 41 42 void io_apic_set_id(int ioapic_id); 43 44 #endif 45