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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/nwfpe/fpa11.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/nwfpe/fpa11.h')
-rw-r--r--kernel/arch/arm/nwfpe/fpa11.h121
1 files changed, 121 insertions, 0 deletions
diff --git a/kernel/arch/arm/nwfpe/fpa11.h b/kernel/arch/arm/nwfpe/fpa11.h
new file mode 100644
index 000000000..d3a6f9298
--- /dev/null
+++ b/kernel/arch/arm/nwfpe/fpa11.h
@@ -0,0 +1,121 @@
+/*
+ NetWinder Floating Point Emulator
+ (c) Rebel.com, 1998-1999
+
+ Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef __FPA11_H__
+#define __FPA11_H__
+
+#define GET_FPA11() ((FPA11 *)(&current_thread_info()->fpstate))
+
+/*
+ * The processes registers are always at the very top of the 8K
+ * stack+task struct. Use the same method as 'current' uses to
+ * reach them.
+ */
+#define GET_USERREG() ((struct pt_regs *)(THREAD_START_SP + (unsigned long)current_thread_info()) - 1)
+
+#include <linux/thread_info.h>
+
+/* includes */
+#include "fpsr.h" /* FP control and status register definitions */
+#include "milieu.h"
+
+struct roundingData {
+ int8 mode;
+ int8 precision;
+ signed char exception;
+};
+
+#include "softfloat.h"
+
+#define typeNone 0x00
+#define typeSingle 0x01
+#define typeDouble 0x02
+#define typeExtended 0x03
+
+/*
+ * This must be no more and no less than 12 bytes.
+ */
+typedef union tagFPREG {
+ float32 fSingle;
+ float64 fDouble;
+#ifdef CONFIG_FPE_NWFPE_XP
+ floatx80 fExtended;
+#else
+ u32 padding[3];
+#endif
+} __attribute__ ((packed,aligned(4))) FPREG;
+
+/*
+ * FPA11 device model.
+ *
+ * This structure is exported to user space. Do not re-order.
+ * Only add new stuff to the end, and do not change the size of
+ * any element. Elements of this structure are used by user
+ * space, and must match struct user_fp in <asm/user.h>.
+ * We include the byte offsets below for documentation purposes.
+ *
+ * The size of this structure and FPREG are checked by fpmodule.c
+ * on initialisation. If the rules have been broken, NWFPE will
+ * not initialise.
+ */
+typedef struct tagFPA11 {
+/* 0 */ FPREG fpreg[8]; /* 8 floating point registers */
+/* 96 */ FPSR fpsr; /* floating point status register */
+/* 100 */ FPCR fpcr; /* floating point control register */
+/* 104 */ unsigned char fType[8]; /* type of floating point value held in
+ floating point registers. One of
+ none, single, double or extended. */
+/* 112 */ int initflag; /* this is special. The kernel guarantees
+ to set it to 0 when a thread is launched,
+ so we can use it to detect whether this
+ instance of the emulator needs to be
+ initialised. */
+} __attribute__ ((packed,aligned(4))) FPA11;
+
+extern int8 SetRoundingMode(const unsigned int);
+extern int8 SetRoundingPrecision(const unsigned int);
+extern void nwfpe_init_fpa(union fp_state *fp);
+
+extern unsigned int EmulateAll(unsigned int opcode);
+
+extern unsigned int EmulateCPDT(const unsigned int opcode);
+extern unsigned int EmulateCPDO(const unsigned int opcode);
+extern unsigned int EmulateCPRT(const unsigned int opcode);
+
+/* fpa11_cpdt.c */
+extern unsigned int PerformLDF(const unsigned int opcode);
+extern unsigned int PerformSTF(const unsigned int opcode);
+extern unsigned int PerformLFM(const unsigned int opcode);
+extern unsigned int PerformSFM(const unsigned int opcode);
+
+/* single_cpdo.c */
+
+extern unsigned int SingleCPDO(struct roundingData *roundData,
+ const unsigned int opcode, FPREG * rFd);
+/* double_cpdo.c */
+extern unsigned int DoubleCPDO(struct roundingData *roundData,
+ const unsigned int opcode, FPREG * rFd);
+
+/* extneded_cpdo.c */
+extern unsigned int ExtendedCPDO(struct roundingData *roundData,
+ const unsigned int opcode, FPREG * rFd);
+
+#endif