1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License.  See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 2014 Imagination Technologies Ltd.
7  */
8 
9 #ifndef _ASM_MALTA_SPACES_H
10 #define _ASM_MALTA_SPACES_H
11 
12 #ifdef CONFIG_EVA
13 
14 /*
15  * Traditional Malta Board Memory Map for EVA
16  *
17  * 0x00000000 - 0x0fffffff: 1st RAM region, 256MB
18  * 0x10000000 - 0x1bffffff: GIC and CPC Control Registers
19  * 0x1c000000 - 0x1fffffff: I/O And Flash
20  * 0x20000000 - 0x7fffffff: 2nd RAM region, 1.5GB
21  * 0x80000000 - 0xffffffff: Physical memory aliases to 0x0 (2GB)
22  *
23  * The kernel is still located in 0x80000000(kseg0). However,
24  * the physical mask has been shifted to 0x80000000 which exploits the alias
25  * on the Malta board. As a result of which, we override the __pa_symbol
26  * to peform direct mapping from virtual to physical addresses. In other
27  * words, the 0x80000000 virtual address maps to 0x80000000 physical address
28  * which in turn aliases to 0x0. We do this in order to be able to use a flat
29  * 2GB of memory (0x80000000 - 0xffffffff) so we can avoid the I/O hole in
30  * 0x10000000 - 0x1fffffff.
31  * The last 64KB of physical memory are reserved for correct HIGHMEM
32  * macros arithmetics.
33  *
34  */
35 
36 #define PAGE_OFFSET	_AC(0x0, UL)
37 #define PHYS_OFFSET	_AC(0x80000000, UL)
38 #define HIGHMEM_START	_AC(0xffff0000, UL)
39 
40 #define __pa_symbol(x)	(RELOC_HIDE((unsigned long)(x), 0))
41 
42 #endif /* CONFIG_EVA */
43 
44 #include <asm/mach-generic/spaces.h>
45 
46 #endif /* _ASM_MALTA_SPACES_H */
47