coreboot
coreboot is an Open Source project aimed at replacing the proprietary BIOS found in most computers.
host_bridge.h
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1 /* SPDX-License-Identifier: GPL-2.0-only */
2 
3 #ifndef __IRONLAKE_REGISTERS_HOST_BRIDGE_H__
4 #define __IRONLAKE_REGISTERS_HOST_BRIDGE_H__
5 
6 #define EPBAR 0x40
7 #define MCHBAR 0x48
8 #define GGC 0x52
9 #define DEVEN 0x54
10 #define DEVEN_IGD (1 << 3)
11 #define DEVEN_PEG10 (1 << 1)
12 #define DEVEN_HOST (1 << 0)
13 
14 #define DMIBAR 0x68
15 
16 #define LAC 0x87 /* Legacy Access Control */
17 
18 #define REMAPBASE 0x98
19 #define REMAPLIMIT 0x9a
20 #define TOM 0xa0
21 #define TOUUD 0xa2
22 #define IGD_BASE 0xa4
23 #define GTT_BASE 0xa8
24 #define TSEG 0xac /* TSEG base */
25 #define TOLUD 0xb0
26 
27 #define SKPD 0xdc /* Scratchpad Data */
28 
29 #define CAPID0 0xe0
30 
31 #endif /* __IRONLAKE_REGISTERS_HOST_BRIDGE_H__ */