diff options
author | Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> | 2006-03-31 05:30:19 -0500 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-31 15:18:51 -0500 |
commit | fbdf2161552a2065047e5df2dbf9ebf69d66a0e9 (patch) | |
tree | 67d1adf47db4d80b712e276e348f2d4ec6da251d /include/asm-um/host_ldt-x86_64.h | |
parent | 12523bdce1a6b5a3a2627b9901162bbd3eef33ed (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/host_ldt-x86_64.h')
-rw-r--r-- | include/asm-um/host_ldt-x86_64.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/include/asm-um/host_ldt-x86_64.h b/include/asm-um/host_ldt-x86_64.h new file mode 100644 index 00000000000..74a63f7d9a9 --- /dev/null +++ b/include/asm-um/host_ldt-x86_64.h | |||
@@ -0,0 +1,38 @@ | |||
1 | #ifndef __ASM_HOST_LDT_X86_64_H | ||
2 | #define __ASM_HOST_LDT_X86_64_H | ||
3 | |||
4 | #include "asm/arch/ldt.h" | ||
5 | |||
6 | /* | ||
7 | * macros stolen from include/asm-x86_64/desc.h | ||
8 | */ | ||
9 | #define LDT_entry_a(info) \ | ||
10 | ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff)) | ||
11 | |||
12 | /* Don't allow setting of the lm bit. It is useless anyways because | ||
13 | * 64bit system calls require __USER_CS. */ | ||
14 | #define LDT_entry_b(info) \ | ||
15 | (((info)->base_addr & 0xff000000) | \ | ||
16 | (((info)->base_addr & 0x00ff0000) >> 16) | \ | ||
17 | ((info)->limit & 0xf0000) | \ | ||
18 | (((info)->read_exec_only ^ 1) << 9) | \ | ||
19 | ((info)->contents << 10) | \ | ||
20 | (((info)->seg_not_present ^ 1) << 15) | \ | ||
21 | ((info)->seg_32bit << 22) | \ | ||
22 | ((info)->limit_in_pages << 23) | \ | ||
23 | ((info)->useable << 20) | \ | ||
24 | /* ((info)->lm << 21) | */ \ | ||
25 | 0x7000) | ||
26 | |||
27 | #define LDT_empty(info) (\ | ||
28 | (info)->base_addr == 0 && \ | ||
29 | (info)->limit == 0 && \ | ||
30 | (info)->contents == 0 && \ | ||
31 | (info)->read_exec_only == 1 && \ | ||
32 | (info)->seg_32bit == 0 && \ | ||
33 | (info)->limit_in_pages == 0 && \ | ||
34 | (info)->seg_not_present == 1 && \ | ||
35 | (info)->useable == 0 && \ | ||
36 | (info)->lm == 0) | ||
37 | |||
38 | #endif | ||