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/*
* TILE-Gx virtual CPU header
*
* Copyright (c) 2015 Chen Gang
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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 Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef TILEGX_CPU_H
#define TILEGX_CPU_H
#include "exec/cpu-defs.h"
#include "qom/object.h"
/* TILE-Gx common register alias */
#define TILEGX_R_RE 0 /* 0 register, for function/syscall return value */
#define TILEGX_R_ERR 1 /* 1 register, for syscall errno flag */
#define TILEGX_R_NR 10 /* 10 register, for syscall number */
#define TILEGX_R_BP 52 /* 52 register, optional frame pointer */
#define TILEGX_R_TP 53 /* TP register, thread local storage data */
#define TILEGX_R_SP 54 /* SP register, stack pointer */
#define TILEGX_R_LR 55 /* LR register, may save pc, but it is not pc */
#define TILEGX_R_COUNT 56 /* Only 56 registers are really useful */
#define TILEGX_R_SN 56 /* SN register, obsoleted, it likes zero register */
#define TILEGX_R_IDN0 57 /* IDN0 register, cause IDN_ACCESS exception */
#define TILEGX_R_IDN1 58 /* IDN1 register, cause IDN_ACCESS exception */
#define TILEGX_R_UDN0 59 /* UDN0 register, cause UDN_ACCESS exception */
#define TILEGX_R_UDN1 60 /* UDN1 register, cause UDN_ACCESS exception */
#define TILEGX_R_UDN2 61 /* UDN2 register, cause UDN_ACCESS exception */
#define TILEGX_R_UDN3 62 /* UDN3 register, cause UDN_ACCESS exception */
#define TILEGX_R_ZERO 63 /* Zero register, always zero */
#define TILEGX_R_NOREG 255 /* Invalid register value */
/* TILE-Gx special registers used by outside */
enum {
TILEGX_SPR_CMPEXCH = 0,
TILEGX_SPR_CRITICAL_SEC = 1,
TILEGX_SPR_SIM_CONTROL = 2,
TILEGX_SPR_EX_CONTEXT_0_0 = 3,
TILEGX_SPR_EX_CONTEXT_0_1 = 4,
TILEGX_SPR_COUNT
};
/* Exception numbers */
typedef enum {
TILEGX_EXCP_NONE = 0,
TILEGX_EXCP_SYSCALL = 1,
TILEGX_EXCP_SIGNAL = 2,
TILEGX_EXCP_OPCODE_UNKNOWN = 0x101,
TILEGX_EXCP_OPCODE_UNIMPLEMENTED = 0x102,
TILEGX_EXCP_OPCODE_CMPEXCH = 0x103,
TILEGX_EXCP_OPCODE_CMPEXCH4 = 0x104,
TILEGX_EXCP_OPCODE_EXCH = 0x105,
TILEGX_EXCP_OPCODE_EXCH4 = 0x106,
TILEGX_EXCP_OPCODE_FETCHADD = 0x107,
TILEGX_EXCP_OPCODE_FETCHADD4 = 0x108,
TILEGX_EXCP_OPCODE_FETCHADDGEZ = 0x109,
TILEGX_EXCP_OPCODE_FETCHADDGEZ4 = 0x10a,
TILEGX_EXCP_OPCODE_FETCHAND = 0x10b,
TILEGX_EXCP_OPCODE_FETCHAND4 = 0x10c,
TILEGX_EXCP_OPCODE_FETCHOR = 0x10d,
TILEGX_EXCP_OPCODE_FETCHOR4 = 0x10e,
TILEGX_EXCP_REG_IDN_ACCESS = 0x181,
TILEGX_EXCP_REG_UDN_ACCESS = 0x182,
TILEGX_EXCP_UNALIGNMENT = 0x201,
TILEGX_EXCP_DBUG_BREAK = 0x301
} TileExcp;
typedef struct CPUTLGState {
uint64_t regs[TILEGX_R_COUNT]; /* Common used registers by outside */
uint64_t spregs[TILEGX_SPR_COUNT]; /* Special used registers by outside */
uint64_t pc; /* Current pc */
#if defined(CONFIG_USER_ONLY)
uint64_t excaddr; /* exception address */
uint64_t atomic_srca; /* Arguments to atomic "exceptions" */
uint64_t atomic_srcb;
uint32_t atomic_dstr;
uint32_t signo; /* Signal number */
uint32_t sigcode; /* Signal code */
#endif
/* Fields up to this point are cleared by a CPU reset */
struct {} end_reset_fields;
} CPUTLGState;
#include "hw/core/cpu.h"
#define TYPE_TILEGX_CPU "tilegx-cpu"
OBJECT_DECLARE_TYPE(TileGXCPU, TileGXCPUClass,
TILEGX_CPU)
/**
* TileGXCPUClass:
* @parent_realize: The parent class' realize handler.
* @parent_reset: The parent class' reset handler.
*
* A Tile-Gx CPU model.
*/
struct TileGXCPUClass {
/*< private >*/
CPUClass parent_class;
/*< public >*/
DeviceRealize parent_realize;
DeviceReset parent_reset;
};
/**
* TileGXCPU:
* @env: #CPUTLGState
*
* A Tile-GX CPU.
*/
struct TileGXCPU {
/*< private >*/
CPUState parent_obj;
/*< public >*/
CPUNegativeOffsetState neg;
CPUTLGState env;
};
/* TILE-Gx memory attributes */
#define MMU_USER_IDX 0 /* Current memory operation is in user mode */
typedef CPUTLGState CPUArchState;
typedef TileGXCPU ArchCPU;
#include "exec/cpu-all.h"
void tilegx_tcg_init(void);
int cpu_tilegx_signal_handler(int host_signum, void *pinfo, void *puc);
#define CPU_RESOLVING_TYPE TYPE_TILEGX_CPU
#define cpu_signal_handler cpu_tilegx_signal_handler
static inline void cpu_get_tb_cpu_state(CPUTLGState *env, target_ulong *pc,
target_ulong *cs_base, uint32_t *flags)
{
*pc = env->pc;
*cs_base = 0;
*flags = 0;
}
#endif
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