1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * This file is subject to the terms and conditions of the GNU General Public 3*4882a593Smuzhiyun * License. See the file "COPYING" in the main directory of this archive 4*4882a593Smuzhiyun * for more details. 5*4882a593Smuzhiyun * 6*4882a593Smuzhiyun * Copyright (C) 2014 Imagination Technologies Ltd. 7*4882a593Smuzhiyun */ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #ifndef _ASM_MALTA_SPACES_H 10*4882a593Smuzhiyun #define _ASM_MALTA_SPACES_H 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #ifdef CONFIG_EVA 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun /* 15*4882a593Smuzhiyun * Traditional Malta Board Memory Map for EVA 16*4882a593Smuzhiyun * 17*4882a593Smuzhiyun * 0x00000000 - 0x0fffffff: 1st RAM region, 256MB 18*4882a593Smuzhiyun * 0x10000000 - 0x1bffffff: GIC and CPC Control Registers 19*4882a593Smuzhiyun * 0x1c000000 - 0x1fffffff: I/O And Flash 20*4882a593Smuzhiyun * 0x20000000 - 0x7fffffff: 2nd RAM region, 1.5GB 21*4882a593Smuzhiyun * 0x80000000 - 0xffffffff: Physical memory aliases to 0x0 (2GB) 22*4882a593Smuzhiyun * 23*4882a593Smuzhiyun * The kernel is still located in 0x80000000(kseg0). However, 24*4882a593Smuzhiyun * the physical mask has been shifted to 0x80000000 which exploits the alias 25*4882a593Smuzhiyun * on the Malta board. As a result of which, we override the __pa_symbol 26*4882a593Smuzhiyun * to peform direct mapping from virtual to physical addresses. In other 27*4882a593Smuzhiyun * words, the 0x80000000 virtual address maps to 0x80000000 physical address 28*4882a593Smuzhiyun * which in turn aliases to 0x0. We do this in order to be able to use a flat 29*4882a593Smuzhiyun * 2GB of memory (0x80000000 - 0xffffffff) so we can avoid the I/O hole in 30*4882a593Smuzhiyun * 0x10000000 - 0x1fffffff. 31*4882a593Smuzhiyun * The last 64KB of physical memory are reserved for correct HIGHMEM 32*4882a593Smuzhiyun * macros arithmetics. 33*4882a593Smuzhiyun * 34*4882a593Smuzhiyun */ 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun #define PAGE_OFFSET _AC(0x0, UL) 37*4882a593Smuzhiyun #define PHYS_OFFSET _AC(0x80000000, UL) 38*4882a593Smuzhiyun #define HIGHMEM_START _AC(0xffff0000, UL) 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun #define __pa_symbol(x) (RELOC_HIDE((unsigned long)(x), 0)) 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun #endif /* CONFIG_EVA */ 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun #include <asm/mach-generic/spaces.h> 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun #endif /* _ASM_MALTA_SPACES_H */ 47