diff options
Diffstat (limited to 'arch/x86/include/asm/fixmap_64.h')
-rw-r--r-- | arch/x86/include/asm/fixmap_64.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/arch/x86/include/asm/fixmap_64.h b/arch/x86/include/asm/fixmap_64.h new file mode 100644 index 00000000000..00a30ab9b1a --- /dev/null +++ b/arch/x86/include/asm/fixmap_64.h | |||
@@ -0,0 +1,83 @@ | |||
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 | |||
11 | #ifndef _ASM_X86_FIXMAP_64_H | ||
12 | #define _ASM_X86_FIXMAP_64_H | ||
13 | |||
14 | #include <linux/kernel.h> | ||
15 | #include <asm/acpi.h> | ||
16 | #include <asm/apicdef.h> | ||
17 | #include <asm/page.h> | ||
18 | #include <asm/vsyscall.h> | ||
19 | #include <asm/efi.h> | ||
20 | |||
21 | /* | ||
22 | * Here we define all the compile-time 'special' virtual | ||
23 | * addresses. The point is to have a constant address at | ||
24 | * compile time, but to set the physical address only | ||
25 | * in the boot process. | ||
26 | * | ||
27 | * These 'compile-time allocated' memory buffers are | ||
28 | * fixed-size 4k pages (or larger if used with an increment | ||
29 | * higher than 1). Use set_fixmap(idx,phys) to associate | ||
30 | * physical memory with fixmap indices. | ||
31 | * | ||
32 | * TLB entries of such buffers will not be flushed across | ||
33 | * task switches. | ||
34 | */ | ||
35 | |||
36 | enum fixed_addresses { | ||
37 | VSYSCALL_LAST_PAGE, | ||
38 | VSYSCALL_FIRST_PAGE = VSYSCALL_LAST_PAGE | ||
39 | + ((VSYSCALL_END-VSYSCALL_START) >> PAGE_SHIFT) - 1, | ||
40 | VSYSCALL_HPET, | ||
41 | FIX_DBGP_BASE, | ||
42 | FIX_EARLYCON_MEM_BASE, | ||
43 | FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */ | ||
44 | FIX_IO_APIC_BASE_0, | ||
45 | FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS - 1, | ||
46 | FIX_EFI_IO_MAP_LAST_PAGE, | ||
47 | FIX_EFI_IO_MAP_FIRST_PAGE = FIX_EFI_IO_MAP_LAST_PAGE | ||
48 | + MAX_EFI_IO_PAGES - 1, | ||
49 | #ifdef CONFIG_PARAVIRT | ||
50 | FIX_PARAVIRT_BOOTMAP, | ||
51 | #endif | ||
52 | __end_of_permanent_fixed_addresses, | ||
53 | #ifdef CONFIG_ACPI | ||
54 | FIX_ACPI_BEGIN, | ||
55 | FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1, | ||
56 | #endif | ||
57 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | ||
58 | FIX_OHCI1394_BASE, | ||
59 | #endif | ||
60 | /* | ||
61 | * 256 temporary boot-time mappings, used by early_ioremap(), | ||
62 | * before ioremap() is functional. | ||
63 | * | ||
64 | * We round it up to the next 256 pages boundary so that we | ||
65 | * can have a single pgd entry and a single pte table: | ||
66 | */ | ||
67 | #define NR_FIX_BTMAPS 64 | ||
68 | #define FIX_BTMAPS_SLOTS 4 | ||
69 | FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 256 - | ||
70 | (__end_of_permanent_fixed_addresses & 255), | ||
71 | FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_SLOTS - 1, | ||
72 | __end_of_fixed_addresses | ||
73 | }; | ||
74 | |||
75 | #define FIXADDR_TOP (VSYSCALL_END-PAGE_SIZE) | ||
76 | #define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) | ||
77 | #define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) | ||
78 | |||
79 | /* Only covers 32bit vsyscalls currently. Need another set for 64bit. */ | ||
80 | #define FIXADDR_USER_START ((unsigned long)VSYSCALL32_VSYSCALL) | ||
81 | #define FIXADDR_USER_END (FIXADDR_USER_START + PAGE_SIZE) | ||
82 | |||
83 | #endif /* _ASM_X86_FIXMAP_64_H */ | ||