git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* mem-layout.h: memory layout |
| 2 | * | |
| 3 | * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. | |
| 4 | * Written by David Howells (dhowells@redhat.com) | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public License | |
| 8 | * as published by the Free Software Foundation; either version | |
| 9 | * 2 of the License, or (at your option) any later version. | |
| 10 | */ | |
| 11 | ||
| 12 | #ifndef _ASM_MEM_LAYOUT_H | |
| 13 | #define _ASM_MEM_LAYOUT_H | |
| 14 | ||
| 15 | #ifndef __ASSEMBLY__ | |
| 16 | #define __UL(X) ((unsigned long) (X)) | |
| 17 | #else | |
| 18 | #define __UL(X) (X) | |
| 19 | #endif | |
| 20 | ||
| 21 | /* | |
| 22 | * PAGE_SHIFT determines the page size | |
| 23 | */ | |
| 24 | #define PAGE_SHIFT 14 | |
| 25 | ||
| 26 | #ifndef __ASSEMBLY__ | |
| 27 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
| 28 | #else | |
| 29 | #define PAGE_SIZE (1 << PAGE_SHIFT) | |
| 30 | #endif | |
| 31 | ||
| 32 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
| 33 | ||
| dc1d60a0 DH |
34 | /* |
| 35 | * the slab must be aligned such that load- and store-double instructions don't | |
| 36 | * fault if used | |
| 37 | */ | |
| a6eb9fe1 | 38 | #define ARCH_DMA_MINALIGN L1_CACHE_BYTES |
| 8507bb00 | 39 | #define ARCH_SLAB_MINALIGN L1_CACHE_BYTES |
| dc1d60a0 | 40 | |
| 1da177e4 LT |
41 | /*****************************************************************************/ |
| 42 | /* | |
| 43 | * virtual memory layout from kernel's point of view | |
| 44 | */ | |
| 45 | #define PAGE_OFFSET ((unsigned long) &__page_offset) | |
| 46 | ||
| 47 | #ifdef CONFIG_MMU | |
| 48 | ||
| 0868ff7a | 49 | /* see Documentation/frv/mmu-layout.txt */ |
| 1da177e4 LT |
50 | #define KERNEL_LOWMEM_START __UL(0xc0000000) |
| 51 | #define KERNEL_LOWMEM_END __UL(0xd0000000) | |
| 52 | #define VMALLOC_START __UL(0xd0000000) | |
| 53 | #define VMALLOC_END __UL(0xd8000000) | |
| 54 | #define PKMAP_BASE __UL(0xd8000000) | |
| 55 | #define PKMAP_END __UL(0xdc000000) | |
| 56 | #define KMAP_ATOMIC_SECONDARY_FRAME __UL(0xdc000000) | |
| 57 | #define KMAP_ATOMIC_PRIMARY_FRAME __UL(0xdd000000) | |
| 58 | ||
| 59 | #endif | |
| 60 | ||
| 61 | #define KERNEL_IO_START __UL(0xe0000000) | |
| 62 | ||
| 63 | ||
| 64 | /*****************************************************************************/ | |
| 65 | /* | |
| 66 | * memory layout from userspace's point of view | |
| 67 | */ | |
| 68 | #define BRK_BASE __UL(2 * 1024 * 1024 + PAGE_SIZE) | |
| 69 | #define STACK_TOP __UL(2 * 1024 * 1024) | |
| 0c93d8e4 | 70 | #define STACK_TOP_MAX __UL(0xc0000000) |
| 1da177e4 LT |
71 | |
| 72 | /* userspace process size */ | |
| 73 | #ifdef CONFIG_MMU | |
| 74 | #define TASK_SIZE (PAGE_OFFSET) | |
| 75 | #else | |
| 76 | #define TASK_SIZE __UL(0xFFFFFFFFUL) | |
| 77 | #endif | |
| 78 | ||
| 79 | /* base of area at which unspecified mmaps will start */ | |
| 80 | #ifdef CONFIG_BINFMT_ELF_FDPIC | |
| 81 | #define TASK_UNMAPPED_BASE __UL(16 * 1024 * 1024) | |
| 82 | #else | |
| 83 | #define TASK_UNMAPPED_BASE __UL(TASK_SIZE / 3) | |
| 84 | #endif | |
| 85 | ||
| 86 | #endif /* _ASM_MEM_LAYOUT_H */ |