47 lines
1.5 KiB
C
Executable file
47 lines
1.5 KiB
C
Executable file
/*
|
|
* 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 */
|