Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
| 10 | |
Ingo Molnar | 3ec9678 | 2008-04-25 18:25:25 +0200 | [diff] [blame] | 11 | #ifndef _ASM_FIXMAP_64_H |
| 12 | #define _ASM_FIXMAP_64_H |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/kernel.h> |
| 15 | #include <asm/apicdef.h> |
| 16 | #include <asm/page.h> |
| 17 | #include <asm/vsyscall.h> |
Huang, Ying | 5b83683 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 18 | #include <asm/efi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
| 20 | /* |
| 21 | * Here we define all the compile-time 'special' virtual |
| 22 | * addresses. The point is to have a constant address at |
| 23 | * compile time, but to set the physical address only |
| 24 | * in the boot process. |
| 25 | * |
Jiri Kosina | bdb345a | 2007-07-21 17:11:21 +0200 | [diff] [blame] | 26 | * These 'compile-time allocated' memory buffers are |
| 27 | * fixed-size 4k pages (or larger if used with an increment |
| 28 | * higher than 1). Use set_fixmap(idx,phys) to associate |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | * physical memory with fixmap indices. |
| 30 | * |
| 31 | * TLB entries of such buffers will not be flushed across |
| 32 | * task switches. |
| 33 | */ |
| 34 | |
| 35 | enum fixed_addresses { |
| 36 | VSYSCALL_LAST_PAGE, |
Joe Perches | dca13fb | 2008-03-23 01:02:10 -0700 | [diff] [blame] | 37 | VSYSCALL_FIRST_PAGE = VSYSCALL_LAST_PAGE |
| 38 | + ((VSYSCALL_END-VSYSCALL_START) >> PAGE_SHIFT) - 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | VSYSCALL_HPET, |
Yinghai Lu | 18a8bd9 | 2007-07-15 23:37:59 -0700 | [diff] [blame] | 40 | FIX_DBGP_BASE, |
| 41 | FIX_EARLYCON_MEM_BASE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | FIX_HPET_BASE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | FIX_IO_APIC_BASE_0, |
Joe Perches | dca13fb | 2008-03-23 01:02:10 -0700 | [diff] [blame] | 45 | FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS - 1, |
Huang, Ying | 5b83683 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 46 | FIX_EFI_IO_MAP_LAST_PAGE, |
Joe Perches | dca13fb | 2008-03-23 01:02:10 -0700 | [diff] [blame] | 47 | FIX_EFI_IO_MAP_FIRST_PAGE = FIX_EFI_IO_MAP_LAST_PAGE |
| 48 | + MAX_EFI_IO_PAGES - 1, |
Jeremy Fitzhardinge | 4080117 | 2008-06-25 00:19:17 -0400 | [diff] [blame^] | 49 | #ifdef CONFIG_PARAVIRT |
| 50 | FIX_PARAVIRT_BOOTMAP, |
| 51 | #endif |
Bernhard Kaindl | f212ec4 | 2008-01-30 13:34:11 +0100 | [diff] [blame] | 52 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT |
| 53 | FIX_OHCI1394_BASE, |
| 54 | #endif |
Jeremy Fitzhardinge | 4583ed5 | 2008-06-25 00:19:03 -0400 | [diff] [blame] | 55 | __end_of_permanent_fixed_addresses, |
| 56 | /* |
| 57 | * 256 temporary boot-time mappings, used by early_ioremap(), |
| 58 | * before ioremap() is functional. |
| 59 | * |
| 60 | * We round it up to the next 512 pages boundary so that we |
| 61 | * can have a single pgd entry and a single pte table: |
| 62 | */ |
| 63 | #define NR_FIX_BTMAPS 64 |
| 64 | #define FIX_BTMAPS_NESTING 4 |
| 65 | FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 512 - |
| 66 | (__end_of_permanent_fixed_addresses & 511), |
| 67 | FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | __end_of_fixed_addresses |
| 69 | }; |
| 70 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | #define FIXADDR_TOP (VSYSCALL_END-PAGE_SIZE) |
| 72 | #define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) |
| 73 | #define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) |
| 74 | |
| 75 | /* Only covers 32bit vsyscalls currently. Need another set for 64bit. */ |
| 76 | #define FIXADDR_USER_START ((unsigned long)VSYSCALL32_VSYSCALL) |
| 77 | #define FIXADDR_USER_END (FIXADDR_USER_START + PAGE_SIZE) |
| 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | #endif |