cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

fpa11.h (3724B)

      1/*
      2    NetWinder Floating Point Emulator
      3    (c) Rebel.com, 1998-1999
      4
      5    Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
      6
      7    This program is free software; you can redistribute it and/or modify
      8    it under the terms of the GNU General Public License as published by
      9    the Free Software Foundation; either version 2 of the License, or
     10    (at your option) any later version.
     11
     12    This program is distributed in the hope that it will be useful,
     13    but WITHOUT ANY WARRANTY; without even the implied warranty of
     14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     15    GNU General Public License for more details.
     16
     17    You should have received a copy of the GNU General Public License
     18    along with this program; if not, see <http://www.gnu.org/licenses/>.
     19*/
     20
     21#ifndef FPA11_H
     22#define FPA11_H
     23
     24#include "cpu.h"
     25
     26#define GET_FPA11() (qemufpa)
     27
     28/*
     29 * The processes registers are always at the very top of the 8K
     30 * stack+task struct.  Use the same method as 'current' uses to
     31 * reach them.
     32 */
     33extern CPUARMState *user_registers;
     34
     35#define GET_USERREG() (user_registers)
     36
     37/* Need task_struct */
     38//#include <linux/sched.h>
     39
     40/* includes */
     41#include "fpsr.h"		/* FP control and status register definitions */
     42#include "fpu/softfloat.h"
     43
     44#define		typeNone		0x00
     45#define		typeSingle		0x01
     46#define		typeDouble		0x02
     47#define		typeExtended		0x03
     48
     49/*
     50 * This must be no more and no less than 12 bytes.
     51 */
     52typedef union tagFPREG {
     53   floatx80 fExtended;
     54   float64  fDouble;
     55   float32  fSingle;
     56} FPREG;
     57
     58/*
     59 * FPA11 device model.
     60 *
     61 * This structure is exported to user space.  Do not re-order.
     62 * Only add new stuff to the end, and do not change the size of
     63 * any element.  Elements of this structure are used by user
     64 * space, and must match struct user_fp in include/asm-arm/user.h.
     65 * We include the byte offsets below for documentation purposes.
     66 *
     67 * The size of this structure and FPREG are checked by fpmodule.c
     68 * on initialisation.  If the rules have been broken, NWFPE will
     69 * not initialise.
     70 */
     71typedef struct tagFPA11 {
     72/*   0 */  FPREG fpreg[8];		/* 8 floating point registers */
     73/*  96 */  FPSR fpsr;			/* floating point status register */
     74/* 100 */  FPCR fpcr;			/* floating point control register */
     75/* 104 */  unsigned char fType[8];	/* type of floating point value held in
     76					   floating point registers.  One of none
     77					   single, double or extended. */
     78/* 112 */  int initflag;		/* this is special.  The kernel guarantees
     79					   to set it to 0 when a thread is launched,
     80					   so we can use it to detect whether this
     81					   instance of the emulator needs to be
     82					   initialised. */
     83    float_status fp_status;      /* QEMU float emulator status */
     84} FPA11;
     85
     86extern FPA11* qemufpa;
     87
     88void resetFPA11(void);
     89void SetRoundingMode(const unsigned int);
     90void SetRoundingPrecision(const unsigned int);
     91
     92static inline unsigned int readRegister(unsigned int reg)
     93{
     94    return (user_registers->regs[(reg)]);
     95}
     96
     97static inline void writeRegister(unsigned int x, unsigned int y)
     98{
     99#if 0
    100	printf("writing %d to r%d\n",y,x);
    101#endif
    102        user_registers->regs[(x)]=(y);
    103}
    104
    105static inline void writeConditionCodes(unsigned int x)
    106{
    107    cpsr_write(user_registers, x, CPSR_NZCV, CPSRWriteByInstr);
    108}
    109
    110#define ARM_REG_PC 15
    111
    112unsigned int EmulateAll(unsigned int opcode, FPA11* qfpa, CPUARMState* qregs);
    113
    114unsigned int EmulateCPDO(const unsigned int);
    115unsigned int EmulateCPDT(const unsigned int);
    116unsigned int EmulateCPRT(const unsigned int);
    117
    118unsigned int SingleCPDO(const unsigned int opcode);
    119unsigned int DoubleCPDO(const unsigned int opcode);
    120unsigned int ExtendedCPDO(const unsigned int opcode);
    121
    122
    123/* included only for get_user/put_user macros */
    124#include "qemu.h"
    125
    126#endif