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 #ifndef QEMU_UNICORE32_CPU_H
  12 #define QEMU_UNICORE32_CPU_H
  13
  14 #define TARGET_LONG_BITS                32
  15 #define TARGET_PAGE_BITS                12
  16
  17 #define TARGET_PHYS_ADDR_SPACE_BITS     32
  18 #define TARGET_VIRT_ADDR_SPACE_BITS     32
  19
  20 #define ELF_MACHINE             EM_UNICORE32
  21
  22 #define CPUArchState                struct CPUUniCore32State
  23
  24 #include "config.h"
  25 #include "qemu-common.h"
  26 #include "exec/cpu-defs.h"
  27 #include "fpu/softfloat.h"
  28
  29 #define NB_MMU_MODES            2
  30
  31 typedef struct CPUUniCore32State {
  32     /* Regs for current mode.  */
  33     uint32_t regs[32];
  34     /* Frequently accessed ASR bits are stored separately for efficiently.
  35        This contains all the other bits.  Use asr_{read,write} to access
  36        the whole ASR.  */
  37     uint32_t uncached_asr;
  38     uint32_t bsr;
  39
  40     /* Banked registers.  */
  41     uint32_t banked_bsr[6];
  42     uint32_t banked_r29[6];
  43     uint32_t banked_r30[6];
  44
  45     /* asr flag cache for faster execution */
  46     uint32_t CF; /* 0 or 1 */
  47     uint32_t VF; /* V is the bit 31. All other bits are undefined */
  48     uint32_t NF; /* N is bit 31. All other bits are undefined.  */
  49     uint32_t ZF; /* Z set if zero.  */
  50
  51     /* System control coprocessor (cp0) */
  52     struct {
  53         uint32_t c0_cpuid;
  54         uint32_t c0_cachetype;
  55         uint32_t c1_sys; /* System control register.  */
  56         uint32_t c2_base; /* MMU translation table base.  */
  57         uint32_t c3_faultstatus; /* Fault status registers.  */
  58         uint32_t c4_faultaddr; /* Fault address registers.  */
  59         uint32_t c5_cacheop; /* Cache operation registers.  */
  60         uint32_t c6_tlbop; /* TLB operation registers. */
  61     } cp0;
  62
  63     /* UniCore-F64 coprocessor state.  */
  64     struct {
  65         float64 regs[16];
  66         uint32_t xregs[32];
  67         float_status fp_status;
  68     } ucf64;
  69
  70     CPU_COMMON
  71
  72     /* Internal CPU feature flags.  */
  73     uint32_t features;
  74
  75 } CPUUniCore32State;
  76
  77 #define ASR_M                   (0x1f)
  78 #define ASR_MODE_USER           (0x10)
  79 #define ASR_MODE_INTR           (0x12)
  80 #define ASR_MODE_PRIV           (0x13)
  81 #define ASR_MODE_TRAP           (0x17)
  82 #define ASR_MODE_EXTN           (0x1b)
  83 #define ASR_MODE_SUSR           (0x1f)
  84 #define ASR_I                   (1 << 7)
  85 #define ASR_V                   (1 << 28)
  86 #define ASR_C                   (1 << 29)
  87 #define ASR_Z                   (1 << 30)
  88 #define ASR_N                   (1 << 31)
  89 #define ASR_NZCV                (ASR_N | ASR_Z | ASR_C | ASR_V)
  90 #define ASR_RESERVED            (~(ASR_M | ASR_I | ASR_NZCV))
  91
  92 #define UC32_EXCP_PRIV          (1)
  93 #define UC32_EXCP_ITRAP         (2)
  94 #define UC32_EXCP_DTRAP         (3)
  95 #define UC32_EXCP_INTR          (4)
  96
  97 /* Return the current ASR value.  */
  98 target_ulong cpu_asr_read(CPUUniCore32State *env1);
  99 /* Set the ASR.  Note that some bits of mask must be all-set or all-clear.  */
 100 void cpu_asr_write(CPUUniCore32State *env1, target_ulong val, target_ulong mask);
 101
 102 /* UniCore-F64 system registers.  */
 103 #define UC32_UCF64_FPSCR                (31)
 104 #define UCF64_FPSCR_MASK                (0x27ffffff)
 105 #define UCF64_FPSCR_RND_MASK            (0x7)
 106 #define UCF64_FPSCR_RND(r)              (((r) >>  0) & UCF64_FPSCR_RND_MASK)
 107 #define UCF64_FPSCR_TRAPEN_MASK         (0x7f)
 108 #define UCF64_FPSCR_TRAPEN(r)           (((r) >> 10) & UCF64_FPSCR_TRAPEN_MASK)
 109 #define UCF64_FPSCR_FLAG_MASK           (0x3ff)
 110 #define UCF64_FPSCR_FLAG(r)             (((r) >> 17) & UCF64_FPSCR_FLAG_MASK)
 111 #define UCF64_FPSCR_FLAG_ZERO           (1 << 17)
 112 #define UCF64_FPSCR_FLAG_INFINITY       (1 << 18)
 113 #define UCF64_FPSCR_FLAG_INVALID        (1 << 19)
 114 #define UCF64_FPSCR_FLAG_UNDERFLOW      (1 << 20)
 115 #define UCF64_FPSCR_FLAG_OVERFLOW       (1 << 21)
 116 #define UCF64_FPSCR_FLAG_INEXACT        (1 << 22)
 117 #define UCF64_FPSCR_FLAG_HUGEINT        (1 << 23)
 118 #define UCF64_FPSCR_FLAG_DENORMAL       (1 << 24)
 119 #define UCF64_FPSCR_FLAG_UNIMP          (1 << 25)
 120 #define UCF64_FPSCR_FLAG_DIVZERO        (1 << 26)
 121
 122 #define UC32_HWCAP_CMOV                 4 /* 1 << 2 */
 123 #define UC32_HWCAP_UCF64                8 /* 1 << 3 */
 124
 125 #define cpu_init                        uc32_cpu_init
 126 #define cpu_exec                        uc32_cpu_exec
 127 #define cpu_signal_handler              uc32_cpu_signal_handler
 128 #define cpu_handle_mmu_fault            uc32_cpu_handle_mmu_fault
 129
 130 CPUUniCore32State *uc32_cpu_init(const char *cpu_model);
 131 int uc32_cpu_exec(CPUUniCore32State *s);
 132 int uc32_cpu_signal_handler(int host_signum, void *pinfo, void *puc);
 133 int uc32_cpu_handle_mmu_fault(CPUUniCore32State *env, target_ulong address, int rw,
 134                               int mmu_idx);
 135
 136 #define CPU_SAVE_VERSION 2
 137
 138 /* MMU modes definitions */
 139 #define MMU_MODE0_SUFFIX _kernel
 140 #define MMU_MODE1_SUFFIX _user
 141 #define MMU_USER_IDX 1
 142 static inline int cpu_mmu_index(CPUUniCore32State *env)
 143 {
 144     return (env->uncached_asr & ASR_M) == ASR_MODE_USER ? 1 : 0;
 145 }
 146
 147 static inline void cpu_clone_regs(CPUUniCore32State *env, target_ulong newsp)
 148 {
 149     if (newsp) {
 150         env->regs[29] = newsp;
 151     }
 152     env->regs[0] = 0;
 153 }
 154
 155 static inline void cpu_set_tls(CPUUniCore32State *env, target_ulong newtls)
 156 {
 157     env->regs[16] = newtls;
 158 }
 159
 160 #include "exec/cpu-all.h"
 161 #include "cpu-qom.h"
 162 #include "exec/exec-all.h"
 163
 164 static inline void cpu_pc_from_tb(CPUUniCore32State *env, TranslationBlock *tb)
 165 {
 166     env->regs[31] = tb->pc;
 167 }
 168
 169 static inline void cpu_get_tb_cpu_state(CPUUniCore32State *env, target_ulong *pc,
 170                                         target_ulong *cs_base, int *flags)
 171 {
 172     *pc = env->regs[31];
 173     *cs_base = 0;
 174     *flags = 0;
 175     if ((env->uncached_asr & ASR_M) != ASR_MODE_USER) {
 176         *flags |= (1 << 6);
 177     }
 178 }
 179
 180 void uc32_translate_init(void);
 181 void do_interrupt(CPUUniCore32State *);
 182 void switch_mode(CPUUniCore32State *, int);
 183
 184 static inline bool cpu_has_work(CPUState *cpu)
 185 {
 186     CPUUniCore32State *env = &UNICORE32_CPU(cpu)->env;
 187
 188     return env->interrupt_request &
 189         (CPU_INTERRUPT_HARD | CPU_INTERRUPT_EXITTB);
 190 }
 191
 192 #endif /* QEMU_UNICORE32_CPU_H */