mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-28 05:24:47 +08:00
e23181deec
This gives a name to the anonymous union introduced in skas-hold-own-ldt, allowing to build on a wider range of gccs. It also removes ldt.h, which somehow became real, and replaces it with a symlink, and creates ldt-x86_64.h as a copy of ldt-i386.h for now. Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
/*
|
|
* Copyright (C) 2004 Fujitsu Siemens Computers GmbH
|
|
* Licensed under the GPL
|
|
*
|
|
* Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
|
|
*/
|
|
|
|
#ifndef __ASM_LDT_I386_H
|
|
#define __ASM_LDT_I386_H
|
|
|
|
#include "asm/semaphore.h"
|
|
#include "asm/arch/ldt.h"
|
|
|
|
struct mmu_context_skas;
|
|
extern void ldt_host_info(void);
|
|
extern long init_new_ldt(struct mmu_context_skas * to_mm,
|
|
struct mmu_context_skas * from_mm);
|
|
extern void free_ldt(struct mmu_context_skas * mm);
|
|
|
|
#define LDT_PAGES_MAX \
|
|
((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE)
|
|
#define LDT_ENTRIES_PER_PAGE \
|
|
(PAGE_SIZE/LDT_ENTRY_SIZE)
|
|
#define LDT_DIRECT_ENTRIES \
|
|
((LDT_PAGES_MAX*sizeof(void *))/LDT_ENTRY_SIZE)
|
|
|
|
struct ldt_entry {
|
|
__u32 a;
|
|
__u32 b;
|
|
};
|
|
|
|
typedef struct uml_ldt {
|
|
int entry_count;
|
|
struct semaphore semaphore;
|
|
union {
|
|
struct ldt_entry * pages[LDT_PAGES_MAX];
|
|
struct ldt_entry entries[LDT_DIRECT_ENTRIES];
|
|
} u;
|
|
} uml_ldt_t;
|
|
|
|
/*
|
|
* macros stolen from include/asm-i386/desc.h
|
|
*/
|
|
#define LDT_entry_a(info) \
|
|
((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
|
|
|
|
#define LDT_entry_b(info) \
|
|
(((info)->base_addr & 0xff000000) | \
|
|
(((info)->base_addr & 0x00ff0000) >> 16) | \
|
|
((info)->limit & 0xf0000) | \
|
|
(((info)->read_exec_only ^ 1) << 9) | \
|
|
((info)->contents << 10) | \
|
|
(((info)->seg_not_present ^ 1) << 15) | \
|
|
((info)->seg_32bit << 22) | \
|
|
((info)->limit_in_pages << 23) | \
|
|
((info)->useable << 20) | \
|
|
0x7000)
|
|
|
|
#define LDT_empty(info) (\
|
|
(info)->base_addr == 0 && \
|
|
(info)->limit == 0 && \
|
|
(info)->contents == 0 && \
|
|
(info)->read_exec_only == 1 && \
|
|
(info)->seg_32bit == 0 && \
|
|
(info)->limit_in_pages == 0 && \
|
|
(info)->seg_not_present == 1 && \
|
|
(info)->useable == 0 )
|
|
|
|
#endif
|