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kernel add
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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2014 Imagination Technologies Ltd.
*/
#ifndef _ASM_MALTA_SPACES_H
#define _ASM_MALTA_SPACES_H
#ifdef CONFIG_EVA
/*
* Traditional Malta Board Memory Map for EVA
*
* 0x00000000 - 0x0fffffff: 1st RAM region, 256MB
* 0x10000000 - 0x1bffffff: GIC and CPC Control Registers
* 0x1c000000 - 0x1fffffff: I/O And Flash
* 0x20000000 - 0x7fffffff: 2nd RAM region, 1.5GB
* 0x80000000 - 0xffffffff: Physical memory aliases to 0x0 (2GB)
*
* The kernel is still located in 0x80000000(kseg0). However,
* the physical mask has been shifted to 0x80000000 which exploits the alias
* on the Malta board. As a result of which, we override the __pa_symbol
* to peform direct mapping from virtual to physical addresses. In other
* words, the 0x80000000 virtual address maps to 0x80000000 physical address
* which in turn aliases to 0x0. We do this in order to be able to use a flat
* 2GB of memory (0x80000000 - 0xffffffff) so we can avoid the I/O hole in
* 0x10000000 - 0x1fffffff.
* The last 64KB of physical memory are reserved for correct HIGHMEM
* macros arithmetics.
*
*/
#define PAGE_OFFSET _AC(0x0, UL)
#define PHYS_OFFSET _AC(0x80000000, UL)
#define HIGHMEM_START _AC(0xffff0000, UL)
#define __pa_symbol(x) (RELOC_HIDE((unsigned long)(x), 0))
#endif /* CONFIG_EVA */
#include <asm/mach-generic/spaces.h>
#endif /* _ASM_MALTA_SPACES_H */
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