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/* 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