| /* | |
| * fixmap.h: compile-time virtual memory allocation | |
| * | |
| * This file is subject to the terms and conditions of the GNU General Public | |
| * License. See the file "COPYING" in the main directory of this archive | |
| * for more details. | |
| * | |
| * Copyright (C) 1998 Ingo Molnar | |
| */ | |
| #ifndef _ASM_X86_FIXMAP_64_H | |
| #define _ASM_X86_FIXMAP_64_H | |
| #include <linux/kernel.h> | |
| #include <asm/acpi.h> | |
| #include <asm/apicdef.h> | |
| #include <asm/page.h> | |
| #include <asm/vsyscall.h> | |
| #include <asm/efi.h> | |
| /* | |
| * Here we define all the compile-time 'special' virtual | |
| * addresses. The point is to have a constant address at | |
| * compile time, but to set the physical address only | |
| * in the boot process. | |
| * | |
| * These 'compile-time allocated' memory buffers are | |
| * fixed-size 4k pages (or larger if used with an increment | |
| * higher than 1). Use set_fixmap(idx,phys) to associate | |
| * physical memory with fixmap indices. | |
| * | |
| * TLB entries of such buffers will not be flushed across | |
| * task switches. | |
| */ | |
| enum fixed_addresses { | |
| VSYSCALL_LAST_PAGE, | |
| VSYSCALL_FIRST_PAGE = VSYSCALL_LAST_PAGE | |
| + ((VSYSCALL_END-VSYSCALL_START) >> PAGE_SHIFT) - 1, | |
| VSYSCALL_HPET, | |
| FIX_DBGP_BASE, | |
| FIX_EARLYCON_MEM_BASE, | |
| FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */ | |
| FIX_IO_APIC_BASE_0, | |
| FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS - 1, | |
| FIX_EFI_IO_MAP_LAST_PAGE, | |
| FIX_EFI_IO_MAP_FIRST_PAGE = FIX_EFI_IO_MAP_LAST_PAGE | |
| + MAX_EFI_IO_PAGES - 1, | |
| #ifdef CONFIG_PARAVIRT | |
| FIX_PARAVIRT_BOOTMAP, | |
| #endif | |
| __end_of_permanent_fixed_addresses, | |
| #ifdef CONFIG_ACPI | |
| FIX_ACPI_BEGIN, | |
| FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1, | |
| #endif | |
| #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
| FIX_OHCI1394_BASE, | |
| #endif | |
| /* | |
| * 256 temporary boot-time mappings, used by early_ioremap(), | |
| * before ioremap() is functional. | |
| * | |
| * We round it up to the next 256 pages boundary so that we | |
| * can have a single pgd entry and a single pte table: | |
| */ | |
| #define NR_FIX_BTMAPS 64 | |
| #define FIX_BTMAPS_SLOTS 4 | |
| FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 256 - | |
| (__end_of_permanent_fixed_addresses & 255), | |
| FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_SLOTS - 1, | |
| __end_of_fixed_addresses | |
| }; | |
| #define FIXADDR_TOP (VSYSCALL_END-PAGE_SIZE) | |
| #define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) | |
| #define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) | |
| /* Only covers 32bit vsyscalls currently. Need another set for 64bit. */ | |
| #define FIXADDR_USER_START ((unsigned long)VSYSCALL32_VSYSCALL) | |
| #define FIXADDR_USER_END (FIXADDR_USER_START + PAGE_SIZE) | |
| #endif /* _ASM_X86_FIXMAP_64_H */ |