projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| f402a65f JF |
2 | #ifndef _ASM_X86_PGTABLE_32_DEFS_H |
| 3 | #define _ASM_X86_PGTABLE_32_DEFS_H | |
| 4 | ||
| 5 | /* | |
| 6 | * The Linux x86 paging architecture is 'compile-time dual-mode', it | |
| 7 | * implements both the traditional 2-level x86 page tables and the | |
| 8 | * newer 3-level PAE-mode page tables. | |
| 9 | */ | |
| 10 | #ifdef CONFIG_X86_PAE | |
| 11 | # include <asm/pgtable-3level_types.h> | |
| 12 | # define PMD_SIZE (1UL << PMD_SHIFT) | |
| 13 | # define PMD_MASK (~(PMD_SIZE - 1)) | |
| 14 | #else | |
| 15 | # include <asm/pgtable-2level_types.h> | |
| 16 | #endif | |
| 17 | ||
| 18 | #define PGDIR_SIZE (1UL << PGDIR_SHIFT) | |
| 19 | #define PGDIR_MASK (~(PGDIR_SIZE - 1)) | |
| 20 | ||
| 21 | /* Just any arbitrary offset to the start of the vmalloc VM area: the | |
| 22 | * current 8MB value just means that there will be a 8MB "hole" after the | |
| 23 | * physical memory until the kernel virtual memory starts. That means that | |
| 24 | * any out-of-bounds memory accesses will hopefully be caught. | |
| 25 | * The vmalloc() routines leaves a hole of 4kB between each vmalloced | |
| 26 | * area for the same reason. ;) | |
| 27 | */ | |
| 28 | #define VMALLOC_OFFSET (8 * 1024 * 1024) | |
| dc16ecf7 | 29 | |
| fc4ac7a5 | 30 | #ifndef __ASSEMBLY__ |
| dc16ecf7 JF |
31 | extern bool __vmalloc_start_set; /* set once high_memory is set */ |
| 32 | #endif | |
| 33 | ||
| f402a65f JF |
34 | #define VMALLOC_START ((unsigned long)high_memory + VMALLOC_OFFSET) |
| 35 | #ifdef CONFIG_X86_PAE | |
| 36 | #define LAST_PKMAP 512 | |
| 37 | #else | |
| 38 | #define LAST_PKMAP 1024 | |
| 39 | #endif | |
| 40 | ||
| 92a0f81d TG |
41 | /* |
| 42 | * Define this here and validate with BUILD_BUG_ON() in pgtable_32.c | |
| 43 | * to avoid include recursion hell | |
| 44 | */ | |
| 45 | #define CPU_ENTRY_AREA_PAGES (NR_CPUS * 40) | |
| 46 | ||
| 47 | #define CPU_ENTRY_AREA_BASE \ | |
| 48 | ((FIXADDR_START - PAGE_SIZE * (CPU_ENTRY_AREA_PAGES + 1)) & PMD_MASK) | |
| 49 | ||
| 50 | #define PKMAP_BASE \ | |
| 51 | ((CPU_ENTRY_AREA_BASE - PAGE_SIZE) & PMD_MASK) | |
| f402a65f JF |
52 | |
| 53 | #ifdef CONFIG_HIGHMEM | |
| 54 | # define VMALLOC_END (PKMAP_BASE - 2 * PAGE_SIZE) | |
| 55 | #else | |
| 92a0f81d | 56 | # define VMALLOC_END (CPU_ENTRY_AREA_BASE - 2 * PAGE_SIZE) |
| f402a65f JF |
57 | #endif |
| 58 | ||
| c398df30 AW |
59 | #define MODULES_VADDR VMALLOC_START |
| 60 | #define MODULES_END VMALLOC_END | |
| 61 | #define MODULES_LEN (MODULES_VADDR - MODULES_END) | |
| 62 | ||
| f402a65f JF |
63 | #define MAXMEM (VMALLOC_END - PAGE_OFFSET - __VMALLOC_RESERVE) |
| 64 | ||
| 65 | #endif /* _ASM_X86_PGTABLE_32_DEFS_H */ |