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[u-boot] / arch / x86 / include / asm / ioapic.h
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