upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
340 lines
9.2 KiB
340 lines
9.2 KiB
/****************************************************************************
|
|
*
|
|
* Realmode X86 Emulator Library
|
|
*
|
|
* Copyright (C) 1991-2004 SciTech Software, Inc.
|
|
* Copyright (C) David Mosberger-Tang
|
|
* Copyright (C) 1999 Egbert Eich
|
|
*
|
|
* ========================================================================
|
|
*
|
|
* Permission to use, copy, modify, distribute, and sell this software and
|
|
* its documentation for any purpose is hereby granted without fee,
|
|
* provided that the above copyright notice appear in all copies and that
|
|
* both that copyright notice and this permission notice appear in
|
|
* supporting documentation, and that the name of the authors not be used
|
|
* in advertising or publicity pertaining to distribution of the software
|
|
* without specific, written prior permission. The authors makes no
|
|
* representations about the suitability of this software for any purpose.
|
|
* It is provided "as is" without express or implied warranty.
|
|
*
|
|
* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
|
|
* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
|
|
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
|
|
* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
|
|
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
|
|
* PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* ========================================================================
|
|
*
|
|
* Language: ANSI C
|
|
* Environment: Any
|
|
* Developer: Kendall Bennett
|
|
*
|
|
* Description: Header file for x86 register definitions.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef __X86EMU_REGS_H
|
|
#define __X86EMU_REGS_H
|
|
|
|
/*---------------------- Macros and type definitions ----------------------*/
|
|
|
|
#pragma pack(1)
|
|
|
|
/*
|
|
* General EAX, EBX, ECX, EDX type registers. Note that for
|
|
* portability, and speed, the issue of byte swapping is not addressed
|
|
* in the registers. All registers are stored in the default format
|
|
* available on the host machine. The only critical issue is that the
|
|
* registers should line up EXACTLY in the same manner as they do in
|
|
* the 386. That is:
|
|
*
|
|
* EAX & 0xff === AL
|
|
* EAX & 0xffff == AX
|
|
*
|
|
* etc. The result is that alot of the calculations can then be
|
|
* done using the native instruction set fully.
|
|
*/
|
|
|
|
#ifdef __BIG_ENDIAN__
|
|
|
|
typedef struct {
|
|
u32 e_reg;
|
|
} I32_reg_t;
|
|
|
|
typedef struct {
|
|
u16 filler0, x_reg;
|
|
} I16_reg_t;
|
|
|
|
typedef struct {
|
|
u8 filler0, filler1, h_reg, l_reg;
|
|
} I8_reg_t;
|
|
|
|
#else /* !__BIG_ENDIAN__ */
|
|
|
|
typedef struct {
|
|
u32 e_reg;
|
|
} I32_reg_t;
|
|
|
|
typedef struct {
|
|
u16 x_reg;
|
|
} I16_reg_t;
|
|
|
|
typedef struct {
|
|
u8 l_reg, h_reg;
|
|
} I8_reg_t;
|
|
|
|
#endif /* BIG_ENDIAN */
|
|
|
|
typedef union {
|
|
I32_reg_t I32_reg;
|
|
I16_reg_t I16_reg;
|
|
I8_reg_t I8_reg;
|
|
} i386_general_register;
|
|
|
|
struct i386_general_regs {
|
|
i386_general_register A, B, C, D;
|
|
};
|
|
|
|
typedef struct i386_general_regs Gen_reg_t;
|
|
|
|
struct i386_special_regs {
|
|
i386_general_register SP, BP, SI, DI, IP;
|
|
u32 FLAGS;
|
|
};
|
|
|
|
/*
|
|
* Segment registers here represent the 16 bit quantities
|
|
* CS, DS, ES, SS.
|
|
*/
|
|
|
|
#undef CS
|
|
#undef DS
|
|
#undef SS
|
|
#undef ES
|
|
#undef FS
|
|
#undef GS
|
|
|
|
struct i386_segment_regs {
|
|
u16 CS, DS, SS, ES, FS, GS;
|
|
};
|
|
|
|
/* 8 bit registers */
|
|
#define R_AH gen.A.I8_reg.h_reg
|
|
#define R_AL gen.A.I8_reg.l_reg
|
|
#define R_BH gen.B.I8_reg.h_reg
|
|
#define R_BL gen.B.I8_reg.l_reg
|
|
#define R_CH gen.C.I8_reg.h_reg
|
|
#define R_CL gen.C.I8_reg.l_reg
|
|
#define R_DH gen.D.I8_reg.h_reg
|
|
#define R_DL gen.D.I8_reg.l_reg
|
|
|
|
/* 16 bit registers */
|
|
#define R_AX gen.A.I16_reg.x_reg
|
|
#define R_BX gen.B.I16_reg.x_reg
|
|
#define R_CX gen.C.I16_reg.x_reg
|
|
#define R_DX gen.D.I16_reg.x_reg
|
|
|
|
/* 32 bit extended registers */
|
|
#define R_EAX gen.A.I32_reg.e_reg
|
|
#define R_EBX gen.B.I32_reg.e_reg
|
|
#define R_ECX gen.C.I32_reg.e_reg
|
|
#define R_EDX gen.D.I32_reg.e_reg
|
|
|
|
/* special registers */
|
|
#define R_SP spc.SP.I16_reg.x_reg
|
|
#define R_BP spc.BP.I16_reg.x_reg
|
|
#define R_SI spc.SI.I16_reg.x_reg
|
|
#define R_DI spc.DI.I16_reg.x_reg
|
|
#define R_IP spc.IP.I16_reg.x_reg
|
|
#define R_FLG spc.FLAGS
|
|
|
|
/* special registers */
|
|
#define R_SP spc.SP.I16_reg.x_reg
|
|
#define R_BP spc.BP.I16_reg.x_reg
|
|
#define R_SI spc.SI.I16_reg.x_reg
|
|
#define R_DI spc.DI.I16_reg.x_reg
|
|
#define R_IP spc.IP.I16_reg.x_reg
|
|
#define R_FLG spc.FLAGS
|
|
|
|
/* special registers */
|
|
#define R_ESP spc.SP.I32_reg.e_reg
|
|
#define R_EBP spc.BP.I32_reg.e_reg
|
|
#define R_ESI spc.SI.I32_reg.e_reg
|
|
#define R_EDI spc.DI.I32_reg.e_reg
|
|
#define R_EIP spc.IP.I32_reg.e_reg
|
|
#define R_EFLG spc.FLAGS
|
|
|
|
/* segment registers */
|
|
#define R_CS seg.CS
|
|
#define R_DS seg.DS
|
|
#define R_SS seg.SS
|
|
#define R_ES seg.ES
|
|
#define R_FS seg.FS
|
|
#define R_GS seg.GS
|
|
|
|
/* flag conditions */
|
|
#define FB_CF 0x0001 /* CARRY flag */
|
|
#define FB_PF 0x0004 /* PARITY flag */
|
|
#define FB_AF 0x0010 /* AUX flag */
|
|
#define FB_ZF 0x0040 /* ZERO flag */
|
|
#define FB_SF 0x0080 /* SIGN flag */
|
|
#define FB_TF 0x0100 /* TRAP flag */
|
|
#define FB_IF 0x0200 /* INTERRUPT ENABLE flag */
|
|
#define FB_DF 0x0400 /* DIR flag */
|
|
#define FB_OF 0x0800 /* OVERFLOW flag */
|
|
|
|
/* 80286 and above always have bit#1 set */
|
|
#define F_ALWAYS_ON (0x0002) /* flag bits always on */
|
|
|
|
/*
|
|
* Define a mask for only those flag bits we will ever pass back
|
|
* (via PUSHF)
|
|
*/
|
|
#define F_MSK (FB_CF|FB_PF|FB_AF|FB_ZF|FB_SF|FB_TF|FB_IF|FB_DF|FB_OF)
|
|
|
|
/* following bits masked in to a 16bit quantity */
|
|
|
|
#define F_CF 0x0001 /* CARRY flag */
|
|
#define F_PF 0x0004 /* PARITY flag */
|
|
#define F_AF 0x0010 /* AUX flag */
|
|
#define F_ZF 0x0040 /* ZERO flag */
|
|
#define F_SF 0x0080 /* SIGN flag */
|
|
#define F_TF 0x0100 /* TRAP flag */
|
|
#define F_IF 0x0200 /* INTERRUPT ENABLE flag */
|
|
#define F_DF 0x0400 /* DIR flag */
|
|
#define F_OF 0x0800 /* OVERFLOW flag */
|
|
|
|
#define TOGGLE_FLAG(flag) (M.x86.R_FLG ^= (flag))
|
|
#define SET_FLAG(flag) (M.x86.R_FLG |= (flag))
|
|
#define CLEAR_FLAG(flag) (M.x86.R_FLG &= ~(flag))
|
|
#define ACCESS_FLAG(flag) (M.x86.R_FLG & (flag))
|
|
#define CLEARALL_FLAG(m) (M.x86.R_FLG = 0)
|
|
|
|
#define CONDITIONAL_SET_FLAG(COND,FLAG) \
|
|
if (COND) SET_FLAG(FLAG); else CLEAR_FLAG(FLAG)
|
|
|
|
#define F_PF_CALC 0x010000 /* PARITY flag has been calced */
|
|
#define F_ZF_CALC 0x020000 /* ZERO flag has been calced */
|
|
#define F_SF_CALC 0x040000 /* SIGN flag has been calced */
|
|
|
|
#define F_ALL_CALC 0xff0000 /* All have been calced */
|
|
|
|
/*
|
|
* Emulator machine state.
|
|
* Segment usage control.
|
|
*/
|
|
#define SYSMODE_SEG_DS_SS 0x00000001
|
|
#define SYSMODE_SEGOVR_CS 0x00000002
|
|
#define SYSMODE_SEGOVR_DS 0x00000004
|
|
#define SYSMODE_SEGOVR_ES 0x00000008
|
|
#define SYSMODE_SEGOVR_FS 0x00000010
|
|
#define SYSMODE_SEGOVR_GS 0x00000020
|
|
#define SYSMODE_SEGOVR_SS 0x00000040
|
|
#define SYSMODE_PREFIX_REPE 0x00000080
|
|
#define SYSMODE_PREFIX_REPNE 0x00000100
|
|
#define SYSMODE_PREFIX_DATA 0x00000200
|
|
#define SYSMODE_PREFIX_ADDR 0x00000400
|
|
#define SYSMODE_INTR_PENDING 0x10000000
|
|
#define SYSMODE_EXTRN_INTR 0x20000000
|
|
#define SYSMODE_HALTED 0x40000000
|
|
|
|
#define SYSMODE_SEGMASK (SYSMODE_SEG_DS_SS | \
|
|
SYSMODE_SEGOVR_CS | \
|
|
SYSMODE_SEGOVR_DS | \
|
|
SYSMODE_SEGOVR_ES | \
|
|
SYSMODE_SEGOVR_FS | \
|
|
SYSMODE_SEGOVR_GS | \
|
|
SYSMODE_SEGOVR_SS)
|
|
#define SYSMODE_CLRMASK (SYSMODE_SEG_DS_SS | \
|
|
SYSMODE_SEGOVR_CS | \
|
|
SYSMODE_SEGOVR_DS | \
|
|
SYSMODE_SEGOVR_ES | \
|
|
SYSMODE_SEGOVR_FS | \
|
|
SYSMODE_SEGOVR_GS | \
|
|
SYSMODE_SEGOVR_SS | \
|
|
SYSMODE_PREFIX_DATA | \
|
|
SYSMODE_PREFIX_ADDR)
|
|
|
|
#define INTR_SYNCH 0x1
|
|
#define INTR_ASYNCH 0x2
|
|
#define INTR_HALTED 0x4
|
|
|
|
typedef struct {
|
|
struct i386_general_regs gen;
|
|
struct i386_special_regs spc;
|
|
struct i386_segment_regs seg;
|
|
/*
|
|
* MODE contains information on:
|
|
* REPE prefix 2 bits repe,repne
|
|
* SEGMENT overrides 5 bits normal,DS,SS,CS,ES
|
|
* Delayed flag set 3 bits (zero, signed, parity)
|
|
* reserved 6 bits
|
|
* interrupt # 8 bits instruction raised interrupt
|
|
* BIOS video segregs 4 bits
|
|
* Interrupt Pending 1 bits
|
|
* Extern interrupt 1 bits
|
|
* Halted 1 bits
|
|
*/
|
|
long mode;
|
|
u8 intno;
|
|
volatile int intr; /* mask of pending interrupts */
|
|
int debug;
|
|
#ifdef CONFIG_X86EMU_DEBUG
|
|
int check;
|
|
u16 saved_ip;
|
|
u16 saved_cs;
|
|
int enc_pos;
|
|
int enc_str_pos;
|
|
char decode_buf[32]; /* encoded byte stream */
|
|
char decoded_buf[256]; /* disassembled strings */
|
|
#endif
|
|
} X86EMU_regs;
|
|
|
|
/****************************************************************************
|
|
REMARKS:
|
|
Structure maintaining the emulator machine state.
|
|
|
|
MEMBERS:
|
|
x86 - X86 registers
|
|
mem_base - Base real mode memory for the emulator
|
|
mem_size - Size of the real mode memory block for the emulator
|
|
****************************************************************************/
|
|
#undef x86
|
|
typedef struct {
|
|
X86EMU_regs x86;
|
|
u8 *mem_base;
|
|
u32 mem_size;
|
|
void *private;
|
|
} X86EMU_sysEnv;
|
|
|
|
#pragma pack()
|
|
|
|
/*----------------------------- Global Variables --------------------------*/
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" { /* Use "C" linkage when in C++ mode */
|
|
#endif
|
|
|
|
/* Global emulator machine state.
|
|
*
|
|
* We keep it global to avoid pointer dereferences in the code for speed.
|
|
*/
|
|
|
|
extern X86EMU_sysEnv _X86EMU_env;
|
|
#define M _X86EMU_env
|
|
|
|
/*-------------------------- Function Prototypes --------------------------*/
|
|
|
|
/* Function to log information at runtime */
|
|
|
|
#ifndef __KERNEL__
|
|
void printk(const char *fmt, ...);
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
} /* End of "C" linkage for C++ */
|
|
#endif
|
|
#endif /* __X86EMU_REGS_H */
|
|
|