target/hexagon/cpu.h

   1 /*
   2  *  Copyright(c) 2019-2023 Qualcomm Innovation Center, Inc. All Rights Reserved.
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef HEXAGON_CPU_H
  19 #define HEXAGON_CPU_H
  20
  21 #include "fpu/softfloat-types.h"
  22
  23 #include "cpu-qom.h"
  24 #include "exec/cpu-defs.h"
  25 #include "hex_regs.h"
  26 #include "mmvec/mmvec.h"
  27 #include "hw/registerfields.h"
  28
  29 #define NUM_PREGS 4
  30 #define TOTAL_PER_THREAD_REGS 64
  31
  32 #define SLOTS_MAX 4
  33 #define STORES_MAX 2
  34 #define REG_WRITES_MAX 32
  35 #define PRED_WRITES_MAX 5                   /* 4 insns + endloop */
  36 #define VSTORES_MAX 2
  37
  38 #define CPU_RESOLVING_TYPE TYPE_HEXAGON_CPU
  39
  40 #define MMU_USER_IDX 0
  41
  42 typedef struct {
  43     target_ulong va;
  44     uint8_t width;
  45     uint32_t data32;
  46     uint64_t data64;
  47 } MemLog;
  48
  49 typedef struct {
  50     target_ulong va;
  51     int size;
  52     DECLARE_BITMAP(mask, MAX_VEC_SIZE_BYTES) QEMU_ALIGNED(16);
  53     MMVector data QEMU_ALIGNED(16);
  54 } VStoreLog;
  55
  56 #define EXEC_STATUS_OK          0x0000
  57 #define EXEC_STATUS_STOP        0x0002
  58 #define EXEC_STATUS_REPLAY      0x0010
  59 #define EXEC_STATUS_LOCKED      0x0020
  60 #define EXEC_STATUS_EXCEPTION   0x0100
  61
  62
  63 #define EXCEPTION_DETECTED      (env->status & EXEC_STATUS_EXCEPTION)
  64 #define REPLAY_DETECTED         (env->status & EXEC_STATUS_REPLAY)
  65 #define CLEAR_EXCEPTION         (env->status &= (~EXEC_STATUS_EXCEPTION))
  66 #define SET_EXCEPTION           (env->status |= EXEC_STATUS_EXCEPTION)
  67
  68 /* Maximum number of vector temps in a packet */
  69 #define VECTOR_TEMPS_MAX            4
  70
  71 typedef struct CPUArchState {
  72     target_ulong gpr[TOTAL_PER_THREAD_REGS];
  73     target_ulong pred[NUM_PREGS];
  74
  75     /* For comparing with LLDB on target - see adjust_stack_ptrs function */
  76     target_ulong last_pc_dumped;
  77     target_ulong stack_start;
  78
  79     uint8_t slot_cancelled;
  80     target_ulong new_value_usr;
  81
  82     /*
  83      * Only used when HEX_DEBUG is on, but unconditionally included
  84      * to reduce recompile time when turning HEX_DEBUG on/off.
  85      */
  86     target_ulong reg_written[TOTAL_PER_THREAD_REGS];
  87
  88     MemLog mem_log_stores[STORES_MAX];
  89
  90     float_status fp_status;
  91
  92     target_ulong llsc_addr;
  93     target_ulong llsc_val;
  94     uint64_t     llsc_val_i64;
  95
  96     MMVector VRegs[NUM_VREGS] QEMU_ALIGNED(16);
  97     MMVector future_VRegs[VECTOR_TEMPS_MAX] QEMU_ALIGNED(16);
  98     MMVector tmp_VRegs[VECTOR_TEMPS_MAX] QEMU_ALIGNED(16);
  99
 100     MMQReg QRegs[NUM_QREGS] QEMU_ALIGNED(16);
 101     MMQReg future_QRegs[NUM_QREGS] QEMU_ALIGNED(16);
 102
 103     /* Temporaries used within instructions */
 104     MMVectorPair VuuV QEMU_ALIGNED(16);
 105     MMVectorPair VvvV QEMU_ALIGNED(16);
 106     MMVectorPair VxxV QEMU_ALIGNED(16);
 107     MMVector     vtmp QEMU_ALIGNED(16);
 108     MMQReg       qtmp QEMU_ALIGNED(16);
 109
 110     VStoreLog vstore[VSTORES_MAX];
 111     target_ulong vstore_pending[VSTORES_MAX];
 112     bool vtcm_pending;
 113     VTCMStoreLog vtcm_log;
 114 } CPUHexagonState;
 115
 116 typedef struct HexagonCPUClass {
 117     CPUClass parent_class;
 118
 119     DeviceRealize parent_realize;
 120     ResettablePhases parent_phases;
 121 } HexagonCPUClass;
 122
 123 struct ArchCPU {
 124     CPUState parent_obj;
 125
 126     CPUHexagonState env;
 127
 128     bool lldb_compat;
 129     target_ulong lldb_stack_adjust;
 130     bool short_circuit;
 131 };
 132
 133 #include "cpu_bits.h"
 134
 135 FIELD(TB_FLAGS, IS_TIGHT_LOOP, 0, 1)
 136
 137 static inline void cpu_get_tb_cpu_state(CPUHexagonState *env, vaddr *pc,
 138                                         uint64_t *cs_base, uint32_t *flags)
 139 {
 140     uint32_t hex_flags = 0;
 141     *pc = env->gpr[HEX_REG_PC];
 142     *cs_base = 0;
 143     if (*pc == env->gpr[HEX_REG_SA0]) {
 144         hex_flags = FIELD_DP32(hex_flags, TB_FLAGS, IS_TIGHT_LOOP, 1);
 145     }
 146     *flags = hex_flags;
 147 }
 148
 149 static inline int cpu_mmu_index(CPUHexagonState *env, bool ifetch)
 150 {
 151 #ifdef CONFIG_USER_ONLY
 152     return MMU_USER_IDX;
 153 #else
 154 #error System mode not supported on Hexagon yet
 155 #endif
 156 }
 157
 158 typedef HexagonCPU ArchCPU;
 159
 160 void hexagon_translate_init(void);
 161
 162 #include "exec/cpu-all.h"
 163
 164 #endif /* HEXAGON_CPU_H */