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authorPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>2006-03-31 05:30:19 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-31 15:18:51 -0500
commitfbdf2161552a2065047e5df2dbf9ebf69d66a0e9 (patch)
tree67d1adf47db4d80b712e276e348f2d4ec6da251d /include/asm-um
parent12523bdce1a6b5a3a2627b9901162bbd3eef33ed (diff)
[PATCH] uml: split ldt.h in arch-independent and arch-dependant code
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>
Diffstat (limited to 'include/asm-um')
-rw-r--r--include/asm-um/host_ldt-i386.h34
-rw-r--r--include/asm-um/host_ldt-x86_64.h (renamed from include/asm-um/ldt-x86_64.h)39
-rw-r--r--include/asm-um/ldt-i386.h69
-rw-r--r--include/asm-um/ldt.h41
4 files changed, 77 insertions, 106 deletions
diff --git a/include/asm-um/host_ldt-i386.h b/include/asm-um/host_ldt-i386.h
new file mode 100644
index 000000000000..b27cb0a9dd30
--- /dev/null
+++ b/include/asm-um/host_ldt-i386.h
@@ -0,0 +1,34 @@
1#ifndef __ASM_HOST_LDT_I386_H
2#define __ASM_HOST_LDT_I386_H
3
4#include "asm/arch/ldt.h"
5
6/*
7 * macros stolen from include/asm-i386/desc.h
8 */
9#define LDT_entry_a(info) \
10 ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
11
12#define LDT_entry_b(info) \
13 (((info)->base_addr & 0xff000000) | \
14 (((info)->base_addr & 0x00ff0000) >> 16) | \
15 ((info)->limit & 0xf0000) | \
16 (((info)->read_exec_only ^ 1) << 9) | \
17 ((info)->contents << 10) | \
18 (((info)->seg_not_present ^ 1) << 15) | \
19 ((info)->seg_32bit << 22) | \
20 ((info)->limit_in_pages << 23) | \
21 ((info)->useable << 20) | \
22 0x7000)
23
24#define LDT_empty(info) (\
25 (info)->base_addr == 0 && \
26 (info)->limit == 0 && \
27 (info)->contents == 0 && \
28 (info)->read_exec_only == 1 && \
29 (info)->seg_32bit == 0 && \
30 (info)->limit_in_pages == 0 && \
31 (info)->seg_not_present == 1 && \
32 (info)->useable == 0 )
33
34#endif
diff --git a/include/asm-um/ldt-x86_64.h b/include/asm-um/host_ldt-x86_64.h
index 96b35aada79a..74a63f7d9a90 100644
--- a/include/asm-um/ldt-x86_64.h
+++ b/include/asm-um/host_ldt-x86_64.h
@@ -1,43 +1,8 @@
1/* 1#ifndef __ASM_HOST_LDT_X86_64_H
2 * Copyright (C) 2004 Fujitsu Siemens Computers GmbH 2#define __ASM_HOST_LDT_X86_64_H
3 * Licensed under the GPL
4 *
5 * Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
6 */
7 3
8#ifndef __ASM_LDT_X86_64_H
9#define __ASM_LDT_X86_64_H
10
11#include "asm/semaphore.h"
12#include "asm/arch/ldt.h" 4#include "asm/arch/ldt.h"
13 5
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/* 6/*
42 * macros stolen from include/asm-x86_64/desc.h 7 * macros stolen from include/asm-x86_64/desc.h
43 */ 8 */
diff --git a/include/asm-um/ldt-i386.h b/include/asm-um/ldt-i386.h
deleted file mode 100644
index 175722a91164..000000000000
--- a/include/asm-um/ldt-i386.h
+++ /dev/null
@@ -1,69 +0,0 @@
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_I386_H
9#define __ASM_LDT_I386_H
10
11#include "asm/semaphore.h"
12#include "asm/arch/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/*
42 * macros stolen from include/asm-i386/desc.h
43 */
44#define LDT_entry_a(info) \
45 ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
46
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) | \
57 0x7000)
58
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 )
68
69#endif
diff --git a/include/asm-um/ldt.h b/include/asm-um/ldt.h
new file mode 100644
index 000000000000..96f82a456ce6
--- /dev/null
+++ b/include/asm-um/ldt.h
@@ -0,0 +1,41 @@
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
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