[CRYPTO] api: Remove deprecated interface
[pv_ops_mirror.git] / arch / i386 / math-emu / fpu_system.h
bloba3ae28c49dddad063de9c177f7d0f13480df3da5
1 /*---------------------------------------------------------------------------+
2 | fpu_system.h |
3 | |
4 | Copyright (C) 1992,1994,1997 |
5 | W. Metzenthen, 22 Parker St, Ormond, Vic 3163, |
6 | Australia. E-mail billm@suburbia.net |
7 | |
8 +---------------------------------------------------------------------------*/
10 #ifndef _FPU_SYSTEM_H
11 #define _FPU_SYSTEM_H
13 /* system dependent definitions */
15 #include <linux/sched.h>
16 #include <linux/kernel.h>
17 #include <linux/mm.h>
19 /* This sets the pointer FPU_info to point to the argument part
20 of the stack frame of math_emulate() */
21 #define SETUP_DATA_AREA(arg) FPU_info = (struct info *) &arg
23 /* s is always from a cpu register, and the cpu does bounds checking
24 * during register load --> no further bounds checks needed */
25 #define LDT_DESCRIPTOR(s) (((struct desc_struct *)current->mm->context.ldt)[(s) >> 3])
26 #define SEG_D_SIZE(x) ((x).b & (3 << 21))
27 #define SEG_G_BIT(x) ((x).b & (1 << 23))
28 #define SEG_GRANULARITY(x) (((x).b & (1 << 23)) ? 4096 : 1)
29 #define SEG_286_MODE(x) ((x).b & ( 0xff000000 | 0xf0000 | (1 << 23)))
30 #define SEG_BASE_ADDR(s) (((s).b & 0xff000000) \
31 | (((s).b & 0xff) << 16) | ((s).a >> 16))
32 #define SEG_LIMIT(s) (((s).b & 0xff0000) | ((s).a & 0xffff))
33 #define SEG_EXECUTE_ONLY(s) (((s).b & ((1 << 11) | (1 << 9))) == (1 << 11))
34 #define SEG_WRITE_PERM(s) (((s).b & ((1 << 11) | (1 << 9))) == (1 << 9))
35 #define SEG_EXPAND_DOWN(s) (((s).b & ((1 << 11) | (1 << 10))) \
36 == (1 << 10))
38 #define I387 (current->thread.i387)
39 #define FPU_info (I387.soft.info)
41 #define FPU_CS (*(unsigned short *) &(FPU_info->___cs))
42 #define FPU_SS (*(unsigned short *) &(FPU_info->___ss))
43 #define FPU_DS (*(unsigned short *) &(FPU_info->___ds))
44 #define FPU_EAX (FPU_info->___eax)
45 #define FPU_EFLAGS (FPU_info->___eflags)
46 #define FPU_EIP (FPU_info->___eip)
47 #define FPU_ORIG_EIP (FPU_info->___orig_eip)
49 #define FPU_lookahead (I387.soft.lookahead)
51 /* nz if ip_offset and cs_selector are not to be set for the current
52 instruction. */
53 #define no_ip_update (*(u_char *)&(I387.soft.no_update))
54 #define FPU_rm (*(u_char *)&(I387.soft.rm))
56 /* Number of bytes of data which can be legally accessed by the current
57 instruction. This only needs to hold a number <= 108, so a byte will do. */
58 #define access_limit (*(u_char *)&(I387.soft.alimit))
60 #define partial_status (I387.soft.swd)
61 #define control_word (I387.soft.cwd)
62 #define fpu_tag_word (I387.soft.twd)
63 #define registers (I387.soft.st_space)
64 #define top (I387.soft.ftop)
66 #define instruction_address (*(struct address *)&I387.soft.fip)
67 #define operand_address (*(struct address *)&I387.soft.foo)
69 #define FPU_access_ok(x,y,z) if ( !access_ok(x,y,z) ) \
70 math_abort(FPU_info,SIGSEGV)
71 #define FPU_abort math_abort(FPU_info, SIGSEGV)
73 #undef FPU_IGNORE_CODE_SEGV
74 #ifdef FPU_IGNORE_CODE_SEGV
75 /* access_ok() is very expensive, and causes the emulator to run
76 about 20% slower if applied to the code. Anyway, errors due to bad
77 code addresses should be much rarer than errors due to bad data
78 addresses. */
79 #define FPU_code_access_ok(z)
80 #else
81 /* A simpler test than access_ok() can probably be done for
82 FPU_code_access_ok() because the only possible error is to step
83 past the upper boundary of a legal code area. */
84 #define FPU_code_access_ok(z) FPU_access_ok(VERIFY_READ,(void __user *)FPU_EIP,z)
85 #endif
87 #define FPU_get_user(x,y) get_user((x),(y))
88 #define FPU_put_user(x,y) put_user((x),(y))
90 #endif