| /* 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 |
