45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||
|
|
/*
|
||
|
|
* OpenRISC Linux
|
||
|
|
*
|
||
|
|
* Linux architectural port borrowing liberally from similar works of
|
||
|
|
* others. All original copyrights apply as per the original source
|
||
|
|
* declaration.
|
||
|
|
*
|
||
|
|
* OpenRISC implementation:
|
||
|
|
* Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
|
||
|
|
* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
|
||
|
|
* et al.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __ASM_OPENRISC_FIXMAP_H
|
||
|
|
#define __ASM_OPENRISC_FIXMAP_H
|
||
|
|
|
||
|
|
/* Why exactly do we need 2 empty pages between the top of the fixed
|
||
|
|
* addresses and the top of virtual memory? Something is using that
|
||
|
|
* memory space but not sure what right now... If you find it, leave
|
||
|
|
* a comment here.
|
||
|
|
*/
|
||
|
|
#define FIXADDR_TOP ((unsigned long) (-2*PAGE_SIZE))
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/bug.h>
|
||
|
|
#include <asm/page.h>
|
||
|
|
|
||
|
|
enum fixed_addresses {
|
||
|
|
FIX_EARLYCON_MEM_BASE,
|
||
|
|
__end_of_fixed_addresses
|
||
|
|
};
|
||
|
|
|
||
|
|
#define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
|
||
|
|
/* FIXADDR_BOTTOM might be a better name here... */
|
||
|
|
#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
|
||
|
|
#define FIXMAP_PAGE_IO PAGE_KERNEL_NOCACHE
|
||
|
|
|
||
|
|
extern void __set_fixmap(enum fixed_addresses idx,
|
||
|
|
phys_addr_t phys, pgprot_t flags);
|
||
|
|
|
||
|
|
#include <asm-generic/fixmap.h>
|
||
|
|
|
||
|
|
#endif
|