projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| fbdf2161 PBG |
1 | /* |
| 2 | * Copyright (C) 2004 Fujitsu Siemens Computers GmbH | |
| 3 | * Licensed under the GPL | |
| 4 | * | |
| 5 | * Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com> | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef __ASM_LDT_H | |
| 9 | #define __ASM_LDT_H | |
| 10 | ||
| 11 | #include "asm/semaphore.h" | |
| 12 | #include "asm/host_ldt.h" | |
| 13 | ||
| 14 | struct mmu_context_skas; | |
| 15 | extern void ldt_host_info(void); | |
| 16 | extern long init_new_ldt(struct mmu_context_skas * to_mm, | |
| 17 | struct mmu_context_skas * from_mm); | |
| 18 | extern void free_ldt(struct mmu_context_skas * mm); | |
| 19 | ||
| 20 | #define LDT_PAGES_MAX \ | |
| 21 | ((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE) | |
| 22 | #define LDT_ENTRIES_PER_PAGE \ | |
| 23 | (PAGE_SIZE/LDT_ENTRY_SIZE) | |
| 24 | #define LDT_DIRECT_ENTRIES \ | |
| 25 | ((LDT_PAGES_MAX*sizeof(void *))/LDT_ENTRY_SIZE) | |
| 26 | ||
| 27 | struct ldt_entry { | |
| 28 | __u32 a; | |
| 29 | __u32 b; | |
| 30 | }; | |
| 31 | ||
| 32 | typedef struct uml_ldt { | |
| 33 | int entry_count; | |
| 34 | struct semaphore semaphore; | |
| 35 | union { | |
| 36 | struct ldt_entry * pages[LDT_PAGES_MAX]; | |
| 37 | struct ldt_entry entries[LDT_DIRECT_ENTRIES]; | |
| 38 | } u; | |
| 39 | } uml_ldt_t; | |
| 40 | ||
| 41 | #endif |