target-unicore32/cpu.h

   1 /*
   2  * UniCore32 virtual CPU header
   3  *
   4  * Copyright (C) 2010-2012 Guan Xuetao
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation, or (at your option) any
   9  * later version. See the COPYING file in the top-level directory.
  10  */
  11
  12 #ifndef UNICORE32_CPU_H
  13 #define UNICORE32_CPU_H
  14
  15 #define TARGET_LONG_BITS                32
  16 #define TARGET_PAGE_BITS                12
  17
  18 #define TARGET_PHYS_ADDR_SPACE_BITS     32
  19 #define TARGET_VIRT_ADDR_SPACE_BITS     32
  20
  21 #define CPUArchState                struct CPUUniCore32State
  22
  23 #include "qemu-common.h"
  24 #include "cpu-qom.h"
  25 #include "exec/cpu-defs.h"
  26 #include "fpu/softfloat.h"
  27
  28 #define NB_MMU_MODES            2
  29
  30 typedef struct CPUUniCore32State {
  31     /* Regs for current mode.  */
  32     uint32_t regs[32];
  33     /* Frequently accessed ASR bits are stored separately for efficiently.
  34        This contains all the other bits.  Use asr_{read,write} to access
  35        the whole ASR.  */
  36     uint32_t uncached_asr;
  37     uint32_t bsr;
  38
  39     /* Banked registers.  */
  40     uint32_t banked_bsr[6];
  41     uint32_t banked_r29[6];
  42     uint32_t banked_r30[6];
  43
  44     /* asr flag cache for faster execution */
  45     uint32_t CF; /* 0 or 1 */
  46     uint32_t VF; /* V is the bit 31. All other bits are undefined */
  47     uint32_t NF; /* N is bit 31. All other bits are undefined.  */
  48     uint32_t ZF; /* Z set if zero.  */
  49
  50     /* System control coprocessor (cp0) */
  51     struct {
  52         uint32_t c0_cpuid;
  53         uint32_t c0_cachetype;
  54         uint32_t c1_sys; /* System control register.  */
  55         uint32_t c2_base; /* MMU translation table base.  */
  56         uint32_t c3_faultstatus; /* Fault status registers.  */
  57         uint32_t c4_faultaddr; /* Fault address registers.  */
  58         uint32_t c5_cacheop; /* Cache operation registers.  */
  59         uint32_t c6_tlbop; /* TLB operation registers. */
  60     } cp0;
  61
  62     /* UniCore-F64 coprocessor state.  */
  63     struct {
  64         float64 regs[16];
  65         uint32_t xregs[32];
  66         float_status fp_status;
  67     } ucf64;
  68
  69     CPU_COMMON
  70
  71     /* Internal CPU feature flags.  */
  72     uint32_t features;
  73
  74 } CPUUniCore32State;
  75
  76 /**
  77  * UniCore32CPU:
  78  * @env: #CPUUniCore32State
  79  *
  80  * A UniCore32 CPU.
  81  */
  82 struct UniCore32CPU {
  83     /*< private >*/
  84     CPUState parent_obj;
  85     /*< public >*/
  86
  87     CPUUniCore32State env;
  88 };
  89
  90 static inline UniCore32CPU *uc32_env_get_cpu(CPUUniCore32State *env)
  91 {
  92     return container_of(env, UniCore32CPU, env);
  93 }
  94
  95 #define ENV_GET_CPU(e) CPU(uc32_env_get_cpu(e))
  96
  97 #define ENV_OFFSET offsetof(UniCore32CPU, env)
  98
  99 void uc32_cpu_do_interrupt(CPUState *cpu);
 100 bool uc32_cpu_exec_interrupt(CPUState *cpu, int int_req);
 101 void uc32_cpu_dump_state(CPUState *cpu, FILE *f,
 102                          fprintf_function cpu_fprintf, int flags);
 103 hwaddr uc32_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
 104
 105 #define ASR_M                   (0x1f)
 106 #define ASR_MODE_USER           (0x10)
 107 #define ASR_MODE_INTR           (0x12)
 108 #define ASR_MODE_PRIV           (0x13)
 109 #define ASR_MODE_TRAP           (0x17)
 110 #define ASR_MODE_EXTN           (0x1b)
 111 #define ASR_MODE_SUSR           (0x1f)
 112 #define ASR_I                   (1 << 7)
 113 #define ASR_V                   (1 << 28)
 114 #define ASR_C                   (1 << 29)
 115 #define ASR_Z                   (1 << 30)
 116 #define ASR_N                   (1 << 31)
 117 #define ASR_NZCV                (ASR_N | ASR_Z | ASR_C | ASR_V)
 118 #define ASR_RESERVED            (~(ASR_M | ASR_I | ASR_NZCV))
 119
 120 #define UC32_EXCP_PRIV          (1)
 121 #define UC32_EXCP_ITRAP         (2)
 122 #define UC32_EXCP_DTRAP         (3)
 123 #define UC32_EXCP_INTR          (4)
 124
 125 /* Return the current ASR value.  */
 126 target_ulong cpu_asr_read(CPUUniCore32State *env1);
 127 /* Set the ASR.  Note that some bits of mask must be all-set or all-clear.  */
 128 void cpu_asr_write(CPUUniCore32State *env1, target_ulong val, target_ulong mask);
 129
 130 /* UniCore-F64 system registers.  */
 131 #define UC32_UCF64_FPSCR                (31)
 132 #define UCF64_FPSCR_MASK                (0x27ffffff)
 133 #define UCF64_FPSCR_RND_MASK            (0x7)
 134 #define UCF64_FPSCR_RND(r)              (((r) >>  0) & UCF64_FPSCR_RND_MASK)
 135 #define UCF64_FPSCR_TRAPEN_MASK         (0x7f)
 136 #define UCF64_FPSCR_TRAPEN(r)           (((r) >> 10) & UCF64_FPSCR_TRAPEN_MASK)
 137 #define UCF64_FPSCR_FLAG_MASK           (0x3ff)
 138 #define UCF64_FPSCR_FLAG(r)             (((r) >> 17) & UCF64_FPSCR_FLAG_MASK)
 139 #define UCF64_FPSCR_FLAG_ZERO           (1 << 17)
 140 #define UCF64_FPSCR_FLAG_INFINITY       (1 << 18)
 141 #define UCF64_FPSCR_FLAG_INVALID        (1 << 19)
 142 #define UCF64_FPSCR_FLAG_UNDERFLOW      (1 << 20)
 143 #define UCF64_FPSCR_FLAG_OVERFLOW       (1 << 21)
 144 #define UCF64_FPSCR_FLAG_INEXACT        (1 << 22)
 145 #define UCF64_FPSCR_FLAG_HUGEINT        (1 << 23)
 146 #define UCF64_FPSCR_FLAG_DENORMAL       (1 << 24)
 147 #define UCF64_FPSCR_FLAG_UNIMP          (1 << 25)
 148 #define UCF64_FPSCR_FLAG_DIVZERO        (1 << 26)
 149
 150 #define UC32_HWCAP_CMOV                 4 /* 1 << 2 */
 151 #define UC32_HWCAP_UCF64                8 /* 1 << 3 */
 152
 153 #define cpu_signal_handler              uc32_cpu_signal_handler
 154
 155 int uc32_cpu_signal_handler(int host_signum, void *pinfo, void *puc);
 156
 157 /* MMU modes definitions */
 158 #define MMU_MODE0_SUFFIX _kernel
 159 #define MMU_MODE1_SUFFIX _user
 160 #define MMU_USER_IDX 1
 161 static inline int cpu_mmu_index(CPUUniCore32State *env, bool ifetch)
 162 {
 163     return (env->uncached_asr & ASR_M) == ASR_MODE_USER ? 1 : 0;
 164 }
 165
 166 #include "exec/cpu-all.h"
 167
 168 UniCore32CPU *uc32_cpu_init(const char *cpu_model);
 169
 170 #define cpu_init(cpu_model) CPU(uc32_cpu_init(cpu_model))
 171
 172 static inline void cpu_get_tb_cpu_state(CPUUniCore32State *env, target_ulong *pc,
 173                                         target_ulong *cs_base, uint32_t *flags)
 174 {
 175     *pc = env->regs[31];
 176     *cs_base = 0;
 177     *flags = 0;
 178     if ((env->uncached_asr & ASR_M) != ASR_MODE_USER) {
 179         *flags |= (1 << 6);
 180     }
 181 }
 182
 183 int uc32_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int rw,
 184                               int mmu_idx);
 185 void uc32_translate_init(void);
 186 void switch_mode(CPUUniCore32State *, int);
 187
 188 #endif /* UNICORE32_CPU_H */