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| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
|---|---|
| 2 | /* |
| 3 | * OpenRISC Linux |
| 4 | * |
| 5 | * Linux architectural port borrowing liberally from similar works of |
| 6 | * others. All original copyrights apply as per the original source |
| 7 | * declaration. |
| 8 | * |
| 9 | * OpenRISC implementation: |
| 10 | * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> |
| 11 | * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> |
| 12 | * et al. |
| 13 | */ |
| 14 | |
| 15 | #ifndef __ASM_OPENRISC_FIXMAP_H |
| 16 | #define __ASM_OPENRISC_FIXMAP_H |
| 17 | |
| 18 | /* Why exactly do we need 2 empty pages between the top of the fixed |
| 19 | * addresses and the top of virtual memory? Something is using that |
| 20 | * memory space but not sure what right now... If you find it, leave |
| 21 | * a comment here. |
| 22 | */ |
| 23 | #define FIXADDR_TOP ((unsigned long) (-2*PAGE_SIZE)) |
| 24 | |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/bug.h> |
| 27 | #include <asm/page.h> |
| 28 | |
| 29 | enum fixed_addresses { |
| 30 | FIX_EARLYCON_MEM_BASE, |
| 31 | FIX_TEXT_POKE0, |
| 32 | __end_of_fixed_addresses |
| 33 | }; |
| 34 | |
| 35 | #define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) |
| 36 | /* FIXADDR_BOTTOM might be a better name here... */ |
| 37 | #define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) |
| 38 | #define FIXMAP_PAGE_IO PAGE_KERNEL_NOCACHE |
| 39 | |
| 40 | extern void __set_fixmap(enum fixed_addresses idx, |
| 41 | phys_addr_t phys, pgprot_t flags); |
| 42 | |
| 43 | #include <asm-generic/fixmap.h> |
| 44 | |
| 45 | #endif |
| 46 |
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