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 #include "cpu-qom.h"
  16 #include "exec/cpu-defs.h"
  17
  18 typedef struct CPUUniCore32State {
  19     /* Regs for current mode.  */
  20     uint32_t regs[32];
  21     /* Frequently accessed ASR bits are stored separately for efficiently.
  22        This contains all the other bits.  Use asr_{read,write} to access
  23        the whole ASR.  */
  24     uint32_t uncached_asr;
  25     uint32_t bsr;
  26
  27     /* Banked registers.  */
  28     uint32_t banked_bsr[6];
  29     uint32_t banked_r29[6];
  30     uint32_t banked_r30[6];
  31
  32     /* asr flag cache for faster execution */
  33     uint32_t CF; /* 0 or 1 */
  34     uint32_t VF; /* V is the bit 31. All other bits are undefined */
  35     uint32_t NF; /* N is bit 31. All other bits are undefined.  */
  36     uint32_t ZF; /* Z set if zero.  */
  37
  38     /* System control coprocessor (cp0) */
  39     struct {
  40         uint32_t c0_cpuid;
  41         uint32_t c0_cachetype;
  42         uint32_t c1_sys; /* System control register.  */
  43         uint32_t c2_base; /* MMU translation table base.  */
  44         uint32_t c3_faultstatus; /* Fault status registers.  */
  45         uint32_t c4_faultaddr; /* Fault address registers.  */
  46         uint32_t c5_cacheop; /* Cache operation registers.  */
  47         uint32_t c6_tlbop; /* TLB operation registers. */
  48     } cp0;
  49
  50     /* UniCore-F64 coprocessor state.  */
  51     struct {
  52         float64 regs[16];
  53         uint32_t xregs[32];
  54         float_status fp_status;
  55     } ucf64;
  56
  57     /* Internal CPU feature flags.  */
  58     uint32_t features;
  59
  60 } CPUUniCore32State;
  61
  62 /**
  63  * UniCore32CPU:
  64  * @env: #CPUUniCore32State
  65  *
  66  * A UniCore32 CPU.
  67  */
  68 struct UniCore32CPU {
  69     /*< private >*/
  70     CPUState parent_obj;
  71     /*< public >*/
  72
  73     CPUNegativeOffsetState neg;
  74     CPUUniCore32State env;
  75 };
  76
  77
  78 void uc32_cpu_do_interrupt(CPUState *cpu);
  79 bool uc32_cpu_exec_interrupt(CPUState *cpu, int int_req);
  80 void uc32_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
  81 hwaddr uc32_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
  82
  83 #define ASR_M                   (0x1f)
  84 #define ASR_MODE_USER           (0x10)
  85 #define ASR_MODE_INTR           (0x12)
  86 #define ASR_MODE_PRIV           (0x13)
  87 #define ASR_MODE_TRAP           (0x17)
  88 #define ASR_MODE_EXTN           (0x1b)
  89 #define ASR_MODE_SUSR           (0x1f)
  90 #define ASR_I                   (1 << 7)
  91 #define ASR_V                   (1 << 28)
  92 #define ASR_C                   (1 << 29)
  93 #define ASR_Z                   (1 << 30)
  94 #define ASR_N                   (1 << 31)
  95 #define ASR_NZCV                (ASR_N | ASR_Z | ASR_C | ASR_V)
  96 #define ASR_RESERVED            (~(ASR_M | ASR_I | ASR_NZCV))
  97
  98 #define UC32_EXCP_PRIV          (1)
  99 #define UC32_EXCP_ITRAP         (2)
 100 #define UC32_EXCP_DTRAP         (3)
 101 #define UC32_EXCP_INTR          (4)
 102
 103 /* Return the current ASR value.  */
 104 target_ulong cpu_asr_read(CPUUniCore32State *env1);
 105 /* Set the ASR.  Note that some bits of mask must be all-set or all-clear.  */
 106 void cpu_asr_write(CPUUniCore32State *env1, target_ulong val, target_ulong mask);
 107
 108 /* UniCore-F64 system registers.  */
 109 #define UC32_UCF64_FPSCR                (31)
 110 #define UCF64_FPSCR_MASK                (0x27ffffff)
 111 #define UCF64_FPSCR_RND_MASK            (0x7)
 112 #define UCF64_FPSCR_RND(r)              (((r) >>  0) & UCF64_FPSCR_RND_MASK)
 113 #define UCF64_FPSCR_TRAPEN_MASK         (0x7f)
 114 #define UCF64_FPSCR_TRAPEN(r)           (((r) >> 10) & UCF64_FPSCR_TRAPEN_MASK)
 115 #define UCF64_FPSCR_FLAG_MASK           (0x3ff)
 116 #define UCF64_FPSCR_FLAG(r)             (((r) >> 17) & UCF64_FPSCR_FLAG_MASK)
 117 #define UCF64_FPSCR_FLAG_ZERO           (1 << 17)
 118 #define UCF64_FPSCR_FLAG_INFINITY       (1 << 18)
 119 #define UCF64_FPSCR_FLAG_INVALID        (1 << 19)
 120 #define UCF64_FPSCR_FLAG_UNDERFLOW      (1 << 20)
 121 #define UCF64_FPSCR_FLAG_OVERFLOW       (1 << 21)
 122 #define UCF64_FPSCR_FLAG_INEXACT        (1 << 22)
 123 #define UCF64_FPSCR_FLAG_HUGEINT        (1 << 23)
 124 #define UCF64_FPSCR_FLAG_DENORMAL       (1 << 24)
 125 #define UCF64_FPSCR_FLAG_UNIMP          (1 << 25)
 126 #define UCF64_FPSCR_FLAG_DIVZERO        (1 << 26)
 127
 128 #define UC32_HWCAP_CMOV                 4 /* 1 << 2 */
 129 #define UC32_HWCAP_UCF64                8 /* 1 << 3 */
 130
 131 #define cpu_signal_handler              uc32_cpu_signal_handler
 132
 133 int uc32_cpu_signal_handler(int host_signum, void *pinfo, void *puc);
 134
 135 /* MMU modes definitions */
 136 #define MMU_MODE0_SUFFIX _kernel
 137 #define MMU_MODE1_SUFFIX _user
 138 #define MMU_USER_IDX 1
 139 static inline int cpu_mmu_index(CPUUniCore32State *env, bool ifetch)
 140 {
 141     return (env->uncached_asr & ASR_M) == ASR_MODE_USER ? 1 : 0;
 142 }
 143
 144 typedef CPUUniCore32State CPUArchState;
 145 typedef UniCore32CPU ArchCPU;
 146
 147 #include "exec/cpu-all.h"
 148
 149 #define UNICORE32_CPU_TYPE_SUFFIX "-" TYPE_UNICORE32_CPU
 150 #define UNICORE32_CPU_TYPE_NAME(model) model UNICORE32_CPU_TYPE_SUFFIX
 151 #define CPU_RESOLVING_TYPE TYPE_UNICORE32_CPU
 152
 153 static inline void cpu_get_tb_cpu_state(CPUUniCore32State *env, target_ulong *pc,
 154                                         target_ulong *cs_base, uint32_t *flags)
 155 {
 156     *pc = env->regs[31];
 157     *cs_base = 0;
 158     *flags = 0;
 159     if ((env->uncached_asr & ASR_M) != ASR_MODE_USER) {
 160         *flags |= (1 << 6);
 161     }
 162 }
 163
 164 bool uc32_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
 165                        MMUAccessType access_type, int mmu_idx,
 166                        bool probe, uintptr_t retaddr);
 167 void uc32_translate_init(void);
 168 void switch_mode(CPUUniCore32State *, int);
 169
 170 #endif /* UNICORE32_CPU_H */