mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 02:16:45 +07:00
MIPS: malta: spaces.h: Add spaces.h file for Malta (EVA)
Add a spaces.h file for Malta to override certain memory macros when operating in EVA mode. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
This commit is contained in:
parent
f8b7faf17b
commit
c9fede2afc
46
arch/mips/include/asm/mach-malta/spaces.h
Normal file
46
arch/mips/include/asm/mach-malta/spaces.h
Normal file
@ -0,0 +1,46 @@
|
||||
/*
|
||||
* 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 */
|
Loading…
Reference in New Issue
Block a user