target/tilegx/cpu.h

   1 /*
   2  *  TILE-Gx virtual CPU header
   3  *
   4  *  Copyright (c) 2015 Chen Gang
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef TILEGX_CPU_H
  21 #define TILEGX_CPU_H
  22
  23 #include "exec/cpu-defs.h"
  24
  25 /* TILE-Gx common register alias */
  26 #define TILEGX_R_RE    0   /*  0 register, for function/syscall return value */
  27 #define TILEGX_R_ERR   1   /*  1 register, for syscall errno flag */
  28 #define TILEGX_R_NR    10  /* 10 register, for syscall number */
  29 #define TILEGX_R_BP    52  /* 52 register, optional frame pointer */
  30 #define TILEGX_R_TP    53  /* TP register, thread local storage data */
  31 #define TILEGX_R_SP    54  /* SP register, stack pointer */
  32 #define TILEGX_R_LR    55  /* LR register, may save pc, but it is not pc */
  33 #define TILEGX_R_COUNT 56  /* Only 56 registers are really useful */
  34 #define TILEGX_R_SN    56  /* SN register, obsoleted, it likes zero register */
  35 #define TILEGX_R_IDN0  57  /* IDN0 register, cause IDN_ACCESS exception */
  36 #define TILEGX_R_IDN1  58  /* IDN1 register, cause IDN_ACCESS exception */
  37 #define TILEGX_R_UDN0  59  /* UDN0 register, cause UDN_ACCESS exception */
  38 #define TILEGX_R_UDN1  60  /* UDN1 register, cause UDN_ACCESS exception */
  39 #define TILEGX_R_UDN2  61  /* UDN2 register, cause UDN_ACCESS exception */
  40 #define TILEGX_R_UDN3  62  /* UDN3 register, cause UDN_ACCESS exception */
  41 #define TILEGX_R_ZERO  63  /* Zero register, always zero */
  42 #define TILEGX_R_NOREG 255 /* Invalid register value */
  43
  44 /* TILE-Gx special registers used by outside */
  45 enum {
  46     TILEGX_SPR_CMPEXCH = 0,
  47     TILEGX_SPR_CRITICAL_SEC = 1,
  48     TILEGX_SPR_SIM_CONTROL = 2,
  49     TILEGX_SPR_EX_CONTEXT_0_0 = 3,
  50     TILEGX_SPR_EX_CONTEXT_0_1 = 4,
  51     TILEGX_SPR_COUNT
  52 };
  53
  54 /* Exception numbers */
  55 typedef enum {
  56     TILEGX_EXCP_NONE = 0,
  57     TILEGX_EXCP_SYSCALL = 1,
  58     TILEGX_EXCP_SIGNAL = 2,
  59     TILEGX_EXCP_OPCODE_UNKNOWN = 0x101,
  60     TILEGX_EXCP_OPCODE_UNIMPLEMENTED = 0x102,
  61     TILEGX_EXCP_OPCODE_CMPEXCH = 0x103,
  62     TILEGX_EXCP_OPCODE_CMPEXCH4 = 0x104,
  63     TILEGX_EXCP_OPCODE_EXCH = 0x105,
  64     TILEGX_EXCP_OPCODE_EXCH4 = 0x106,
  65     TILEGX_EXCP_OPCODE_FETCHADD = 0x107,
  66     TILEGX_EXCP_OPCODE_FETCHADD4 = 0x108,
  67     TILEGX_EXCP_OPCODE_FETCHADDGEZ = 0x109,
  68     TILEGX_EXCP_OPCODE_FETCHADDGEZ4 = 0x10a,
  69     TILEGX_EXCP_OPCODE_FETCHAND = 0x10b,
  70     TILEGX_EXCP_OPCODE_FETCHAND4 = 0x10c,
  71     TILEGX_EXCP_OPCODE_FETCHOR = 0x10d,
  72     TILEGX_EXCP_OPCODE_FETCHOR4 = 0x10e,
  73     TILEGX_EXCP_REG_IDN_ACCESS = 0x181,
  74     TILEGX_EXCP_REG_UDN_ACCESS = 0x182,
  75     TILEGX_EXCP_UNALIGNMENT = 0x201,
  76     TILEGX_EXCP_DBUG_BREAK = 0x301
  77 } TileExcp;
  78
  79 typedef struct CPUTLGState {
  80     uint64_t regs[TILEGX_R_COUNT];     /* Common used registers by outside */
  81     uint64_t spregs[TILEGX_SPR_COUNT]; /* Special used registers by outside */
  82     uint64_t pc;                       /* Current pc */
  83
  84 #if defined(CONFIG_USER_ONLY)
  85     uint64_t excaddr;                  /* exception address */
  86     uint64_t atomic_srca;              /* Arguments to atomic "exceptions" */
  87     uint64_t atomic_srcb;
  88     uint32_t atomic_dstr;
  89     uint32_t signo;                    /* Signal number */
  90     uint32_t sigcode;                  /* Signal code */
  91 #endif
  92
  93     /* Fields up to this point are cleared by a CPU reset */
  94     struct {} end_reset_fields;
  95 } CPUTLGState;
  96
  97 #include "hw/core/cpu.h"
  98
  99 #define TYPE_TILEGX_CPU "tilegx-cpu"
 100
 101 #define TILEGX_CPU_CLASS(klass) \
 102     OBJECT_CLASS_CHECK(TileGXCPUClass, (klass), TYPE_TILEGX_CPU)
 103 #define TILEGX_CPU(obj) \
 104     OBJECT_CHECK(TileGXCPU, (obj), TYPE_TILEGX_CPU)
 105 #define TILEGX_CPU_GET_CLASS(obj) \
 106     OBJECT_GET_CLASS(TileGXCPUClass, (obj), TYPE_TILEGX_CPU)
 107
 108 /**
 109  * TileGXCPUClass:
 110  * @parent_realize: The parent class' realize handler.
 111  * @parent_reset: The parent class' reset handler.
 112  *
 113  * A Tile-Gx CPU model.
 114  */
 115 typedef struct TileGXCPUClass {
 116     /*< private >*/
 117     CPUClass parent_class;
 118     /*< public >*/
 119
 120     DeviceRealize parent_realize;
 121     void (*parent_reset)(CPUState *cpu);
 122 } TileGXCPUClass;
 123
 124 /**
 125  * TileGXCPU:
 126  * @env: #CPUTLGState
 127  *
 128  * A Tile-GX CPU.
 129  */
 130 typedef struct TileGXCPU {
 131     /*< private >*/
 132     CPUState parent_obj;
 133     /*< public >*/
 134
 135     CPUNegativeOffsetState neg;
 136     CPUTLGState env;
 137 } TileGXCPU;
 138
 139
 140 /* TILE-Gx memory attributes */
 141 #define MMU_USER_IDX    0  /* Current memory operation is in user mode */
 142
 143 typedef CPUTLGState CPUArchState;
 144 typedef TileGXCPU ArchCPU;
 145
 146 #include "exec/cpu-all.h"
 147
 148 void tilegx_tcg_init(void);
 149 int cpu_tilegx_signal_handler(int host_signum, void *pinfo, void *puc);
 150
 151 #define CPU_RESOLVING_TYPE TYPE_TILEGX_CPU
 152
 153 #define cpu_signal_handler cpu_tilegx_signal_handler
 154
 155 static inline void cpu_get_tb_cpu_state(CPUTLGState *env, target_ulong *pc,
 156                                         target_ulong *cs_base, uint32_t *flags)
 157 {
 158     *pc = env->pc;
 159     *cs_base = 0;
 160     *flags = 0;
 161 }
 162
 163 #endif