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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 |