projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| bf4b558e MS |
1 | /* |
| 2 | * fixmap.h: compile-time virtual memory allocation | |
| 3 | * | |
| 4 | * This file is subject to the terms and conditions of the GNU General Public | |
| 5 | * License. See the file "COPYING" in the main directory of this archive | |
| 6 | * for more details. | |
| 7 | * | |
| 8 | * Copyright (C) 1998 Ingo Molnar | |
| 9 | * Copyright (C) 2013 Mark Salter <msalter@redhat.com> | |
| 10 | * | |
| 11 | * Adapted from arch/x86_64 version. | |
| 12 | * | |
| 13 | */ | |
| 14 | ||
| 15 | #ifndef _ASM_ARM64_FIXMAP_H | |
| 16 | #define _ASM_ARM64_FIXMAP_H | |
| 17 | ||
| 18 | #ifndef __ASSEMBLY__ | |
| 19 | #include <linux/kernel.h> | |
| 20 | #include <asm/page.h> | |
| 21 | ||
| 22 | /* | |
| 23 | * Here we define all the compile-time 'special' virtual | |
| 24 | * addresses. The point is to have a constant address at | |
| 25 | * compile time, but to set the physical address only | |
| 26 | * in the boot process. | |
| 27 | * | |
| 28 | * These 'compile-time allocated' memory buffers are | |
| 29 | * page-sized. Use set_fixmap(idx,phys) to associate | |
| 30 | * physical memory with fixmap indices. | |
| 31 | * | |
| 32 | */ | |
| 33 | enum fixed_addresses { | |
| dab78b6d | 34 | FIX_HOLE, |
| bf4b558e MS |
35 | FIX_EARLYCON_MEM_BASE, |
| 36 | __end_of_permanent_fixed_addresses, | |
| 37 | ||
| 38 | /* | |
| 39 | * Temporary boot-time mappings, used by early_ioremap(), | |
| 40 | * before ioremap() is functional. | |
| 41 | */ | |
| 42 | #ifdef CONFIG_ARM64_64K_PAGES | |
| 43 | #define NR_FIX_BTMAPS 4 | |
| 44 | #else | |
| 45 | #define NR_FIX_BTMAPS 64 | |
| 46 | #endif | |
| 47 | #define FIX_BTMAPS_SLOTS 7 | |
| 48 | #define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS) | |
| 49 | ||
| 50 | FIX_BTMAP_END = __end_of_permanent_fixed_addresses, | |
| 51 | FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1, | |
| 52 | __end_of_fixed_addresses | |
| 53 | }; | |
| 54 | ||
| 55 | #define FIXADDR_SIZE (__end_of_permanent_fixed_addresses << PAGE_SHIFT) | |
| 56 | #define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) | |
| 57 | ||
| 58 | #define FIXMAP_PAGE_IO __pgprot(PROT_DEVICE_nGnRE) | |
| 59 | ||
| af86e597 | 60 | void __init early_fixmap_init(void); |
| bf4b558e | 61 | |
| af86e597 LA |
62 | #define __early_set_fixmap __set_fixmap |
| 63 | ||
| 64 | extern void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot); | |
| bf4b558e MS |
65 | |
| 66 | #include <asm-generic/fixmap.h> | |
| 67 | ||
| 68 | #endif /* !__ASSEMBLY__ */ | |
| 69 | #endif /* _ASM_ARM64_FIXMAP_H */ |