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 14struct mmu_context_skas; 15extern void ldt_host_info(void); 16extern long init_new_ldt(struct mmu_context_skas * to_mm, 17 struct mmu_context_skas * from_mm); 18extern 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 27struct ldt_entry { 28 __u32 a; 29 __u32 b; 30}; 31 32typedef 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 42