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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/asm-um/ldt.h
2 * Copyright (C) 2004 Fujitsu Siemens Computers GmbH
3 * Licensed under the GPL
5 * Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
8 #ifndef __ASM_LDT_I386_H
9 #define __ASM_LDT_I386_H
11 #include "asm/semaphore.h"
12 #include "asm/arch/ldt.h"
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
);
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)
32 typedef struct uml_ldt
{
34 struct semaphore semaphore
;
36 struct ldt_entry
* pages
[LDT_PAGES_MAX
];
37 struct ldt_entry entries
[LDT_DIRECT_ENTRIES
];
42 * macros stolen from include/asm-i386/desc.h
44 #define LDT_entry_a(info) \
45 ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
47 #define LDT_entry_b(info) \
48 (((info)->base_addr & 0xff000000) | \
49 (((info)->base_addr & 0x00ff0000) >> 16) | \
50 ((info)->limit & 0xf0000) | \
51 (((info)->read_exec_only ^ 1) << 9) | \
52 ((info)->contents << 10) | \
53 (((info)->seg_not_present ^ 1) << 15) | \
54 ((info)->seg_32bit << 22) | \
55 ((info)->limit_in_pages << 23) | \
56 ((info)->useable << 20) | \
59 #define LDT_empty(info) (\
60 (info)->base_addr == 0 && \
61 (info)->limit == 0 && \
62 (info)->contents == 0 && \
63 (info)->read_exec_only == 1 && \
64 (info)->seg_32bit == 0 && \
65 (info)->limit_in_pages == 0 && \
66 (info)->seg_not_present == 1 && \
67 (info)->useable == 0 )
73 #include "asm/arch/ldt.h"