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ldt-{i386,x86_64}.h is made of two different parts - some code for parsing of
LDT descriptors, which is arch-dependant, and the code to handle uml_ldt_t (an
LDT block inside UML), which is mostly arch-independant (among x86 and x86_64,
at least).
Join the common part in a single file (ldt.h) and split the rest away
(host_ldt-{i386,x86_64}.h).
This is needed because processor.h, with next patches, will start including
the LDT descriptor parsing macros in host_ldt.h, but it can't include ldt.h
because it uses semaphores (and to define semaphores one must first include
processor.h!).
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Acked-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
42 lines
901 B
C
42 lines
901 B
C
/*
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* Copyright (C) 2004 Fujitsu Siemens Computers GmbH
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* Licensed under the GPL
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*
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* Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
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*/
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#ifndef __ASM_LDT_H
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#define __ASM_LDT_H
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#include "asm/semaphore.h"
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#include "asm/host_ldt.h"
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struct mmu_context_skas;
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extern void ldt_host_info(void);
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extern long init_new_ldt(struct mmu_context_skas * to_mm,
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struct mmu_context_skas * from_mm);
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extern void free_ldt(struct mmu_context_skas * mm);
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#define LDT_PAGES_MAX \
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((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE)
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#define LDT_ENTRIES_PER_PAGE \
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(PAGE_SIZE/LDT_ENTRY_SIZE)
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#define LDT_DIRECT_ENTRIES \
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((LDT_PAGES_MAX*sizeof(void *))/LDT_ENTRY_SIZE)
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struct ldt_entry {
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__u32 a;
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__u32 b;
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};
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typedef struct uml_ldt {
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int entry_count;
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struct semaphore semaphore;
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union {
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struct ldt_entry * pages[LDT_PAGES_MAX];
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struct ldt_entry entries[LDT_DIRECT_ENTRIES];
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} u;
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} uml_ldt_t;
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#endif
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