Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / x86 / math-emu / fpu_system.h

diff --git a/kernel/arch/x86/math-emu/fpu_system.h b/kernel/arch/x86/math-emu/fpu_system.h
new file mode 100644 (file)
index 0000000..2c61441
--- /dev/null
+++ b/kernel/arch/x86/math-emu/fpu_system.h
@@ -0,0 +1,86 @@
+/*---------------------------------------------------------------------------+
+ |  fpu_system.h                                                             |
+ |                                                                           |
+ | Copyright (C) 1992,1994,1997                                              |
+ |                       W. Metzenthen, 22 Parker St, Ormond, Vic 3163,      |
+ |                       Australia.  E-mail   billm@suburbia.net             |
+ |                                                                           |
+ +---------------------------------------------------------------------------*/
+
+#ifndef _FPU_SYSTEM_H
+#define _FPU_SYSTEM_H
+
+/* system dependent definitions */
+
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+
+/* s is always from a cpu register, and the cpu does bounds checking
+ * during register load --> no further bounds checks needed */
+#define LDT_DESCRIPTOR(s)      (((struct desc_struct *)current->mm->context.ldt)[(s) >> 3])
+#define SEG_D_SIZE(x)          ((x).b & (3 << 21))
+#define SEG_G_BIT(x)           ((x).b & (1 << 23))
+#define SEG_GRANULARITY(x)     (((x).b & (1 << 23)) ? 4096 : 1)
+#define SEG_286_MODE(x)                ((x).b & ( 0xff000000 | 0xf0000 | (1 << 23)))
+#define SEG_BASE_ADDR(s)       (((s).b & 0xff000000) \
+                                | (((s).b & 0xff) << 16) | ((s).a >> 16))
+#define SEG_LIMIT(s)           (((s).b & 0xff0000) | ((s).a & 0xffff))
+#define SEG_EXECUTE_ONLY(s)    (((s).b & ((1 << 11) | (1 << 9))) == (1 << 11))
+#define SEG_WRITE_PERM(s)      (((s).b & ((1 << 11) | (1 << 9))) == (1 << 9))
+#define SEG_EXPAND_DOWN(s)     (((s).b & ((1 << 11) | (1 << 10))) \
+                                == (1 << 10))
+
+#define I387                   (current->thread.fpu.state)
+#define FPU_info               (I387->soft.info)
+
+#define FPU_CS                 (*(unsigned short *) &(FPU_info->regs->cs))
+#define FPU_SS                 (*(unsigned short *) &(FPU_info->regs->ss))
+#define FPU_DS                 (*(unsigned short *) &(FPU_info->regs->ds))
+#define FPU_EAX                        (FPU_info->regs->ax)
+#define FPU_EFLAGS             (FPU_info->regs->flags)
+#define FPU_EIP                        (FPU_info->regs->ip)
+#define FPU_ORIG_EIP           (FPU_info->___orig_eip)
+
+#define FPU_lookahead           (I387->soft.lookahead)
+
+/* nz if ip_offset and cs_selector are not to be set for the current
+   instruction. */
+#define no_ip_update           (*(u_char *)&(I387->soft.no_update))
+#define FPU_rm                 (*(u_char *)&(I387->soft.rm))
+
+/* Number of bytes of data which can be legally accessed by the current
+   instruction. This only needs to hold a number <= 108, so a byte will do. */
+#define access_limit           (*(u_char *)&(I387->soft.alimit))
+
+#define partial_status         (I387->soft.swd)
+#define control_word           (I387->soft.cwd)
+#define fpu_tag_word           (I387->soft.twd)
+#define registers              (I387->soft.st_space)
+#define top                    (I387->soft.ftop)
+
+#define instruction_address    (*(struct address *)&I387->soft.fip)
+#define operand_address                (*(struct address *)&I387->soft.foo)
+
+#define FPU_access_ok(x,y,z)   if ( !access_ok(x,y,z) ) \
+                               math_abort(FPU_info,SIGSEGV)
+#define FPU_abort              math_abort(FPU_info, SIGSEGV)
+
+#undef FPU_IGNORE_CODE_SEGV
+#ifdef FPU_IGNORE_CODE_SEGV
+/* access_ok() is very expensive, and causes the emulator to run
+   about 20% slower if applied to the code. Anyway, errors due to bad
+   code addresses should be much rarer than errors due to bad data
+   addresses. */
+#define        FPU_code_access_ok(z)
+#else
+/* A simpler test than access_ok() can probably be done for
+   FPU_code_access_ok() because the only possible error is to step
+   past the upper boundary of a legal code area. */
+#define        FPU_code_access_ok(z) FPU_access_ok(VERIFY_READ,(void __user *)FPU_EIP,z)
+#endif
+
+#define FPU_get_user(x,y)       get_user((x),(y))
+#define FPU_put_user(x,y)       put_user((x),(y))
+
+#endif