spaces.h (1547B)
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 */