target-unicore32/cpu.h

   1 /*
   2  * UniCore32 virtual CPU header
   3  *
   4  * Copyright (C) 2010-2011 GUAN Xue-tao
   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 __CPU_UC32_H__
  12 #define __CPU_UC32_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 "cpu-defs.h"
  27 #include "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          (ASR_MODE_PRIV)
  93 #define UC32_EXCP_TRAP          (ASR_MODE_TRAP)
  94
  95 /* Return the current ASR value.  */
  96 target_ulong cpu_asr_read(CPUUniCore32State *env1);
  97 /* Set the ASR.  Note that some bits of mask must be all-set or all-clear.  */
  98 void cpu_asr_write(CPUUniCore32State *env1, target_ulong val, target_ulong mask);
  99
 100 /* UniCore-F64 system registers.  */
 101 #define UC32_UCF64_FPSCR                (31)
 102 #define UCF64_FPSCR_MASK                (0x27ffffff)
 103 #define UCF64_FPSCR_RND_MASK            (0x7)
 104 #define UCF64_FPSCR_RND(r)              (((r) >>  0) & UCF64_FPSCR_RND_MASK)
 105 #define UCF64_FPSCR_TRAPEN_MASK         (0x7f)
 106 #define UCF64_FPSCR_TRAPEN(r)           (((r) >> 10) & UCF64_FPSCR_TRAPEN_MASK)
 107 #define UCF64_FPSCR_FLAG_MASK           (0x3ff)
 108 #define UCF64_FPSCR_FLAG(r)             (((r) >> 17) & UCF64_FPSCR_FLAG_MASK)
 109 #define UCF64_FPSCR_FLAG_ZERO           (1 << 17)
 110 #define UCF64_FPSCR_FLAG_INFINITY       (1 << 18)
 111 #define UCF64_FPSCR_FLAG_INVALID        (1 << 19)
 112 #define UCF64_FPSCR_FLAG_UNDERFLOW      (1 << 20)
 113 #define UCF64_FPSCR_FLAG_OVERFLOW       (1 << 21)
 114 #define UCF64_FPSCR_FLAG_INEXACT        (1 << 22)
 115 #define UCF64_FPSCR_FLAG_HUGEINT        (1 << 23)
 116 #define UCF64_FPSCR_FLAG_DENORMAL       (1 << 24)
 117 #define UCF64_FPSCR_FLAG_UNIMP          (1 << 25)
 118 #define UCF64_FPSCR_FLAG_DIVZERO        (1 << 26)
 119
 120 #define UC32_HWCAP_CMOV                 4 /* 1 << 2 */
 121 #define UC32_HWCAP_UCF64                8 /* 1 << 3 */
 122
 123 #define UC32_CPUID(env)                 (env->cp0.c0_cpuid)
 124 #define UC32_CPUID_UCV2                 0x40010863
 125 #define UC32_CPUID_ANY                  0xffffffff
 126
 127 #define cpu_init                        uc32_cpu_init
 128 #define cpu_exec                        uc32_cpu_exec
 129 #define cpu_signal_handler              uc32_cpu_signal_handler
 130 #define cpu_handle_mmu_fault            uc32_cpu_handle_mmu_fault
 131
 132 CPUUniCore32State *uc32_cpu_init(const char *cpu_model);
 133 int uc32_cpu_exec(CPUUniCore32State *s);
 134 int uc32_cpu_signal_handler(int host_signum, void *pinfo, void *puc);
 135 int uc32_cpu_handle_mmu_fault(CPUUniCore32State *env, target_ulong address, int rw,
 136                               int mmu_idx);
 137
 138 #define CPU_SAVE_VERSION 2
 139
 140 /* MMU modes definitions */
 141 #define MMU_MODE0_SUFFIX _kernel
 142 #define MMU_MODE1_SUFFIX _user
 143 #define MMU_USER_IDX 1
 144 static inline int cpu_mmu_index(CPUUniCore32State *env)
 145 {
 146     return (env->uncached_asr & ASR_M) == ASR_MODE_USER ? 1 : 0;
 147 }
 148
 149 static inline void cpu_clone_regs(CPUUniCore32State *env, target_ulong newsp)
 150 {
 151     if (newsp) {
 152         env->regs[29] = newsp;
 153     }
 154     env->regs[0] = 0;
 155 }
 156
 157 static inline void cpu_set_tls(CPUUniCore32State *env, target_ulong newtls)
 158 {
 159     env->regs[16] = newtls;
 160 }
 161
 162 #include "cpu-all.h"
 163 #include "exec-all.h"
 164
 165 static inline void cpu_pc_from_tb(CPUUniCore32State *env, TranslationBlock *tb)
 166 {
 167     env->regs[31] = tb->pc;
 168 }
 169
 170 static inline void cpu_get_tb_cpu_state(CPUUniCore32State *env, target_ulong *pc,
 171                                         target_ulong *cs_base, int *flags)
 172 {
 173     *pc = env->regs[31];
 174     *cs_base = 0;
 175     *flags = 0;
 176     if ((env->uncached_asr & ASR_M) != ASR_MODE_USER) {
 177         *flags |= (1 << 6);
 178     }
 179 }
 180
 181 void uc32_translate_init(void);
 182 void do_interrupt(CPUUniCore32State *);
 183 void switch_mode(CPUUniCore32State *, int);
 184
 185 static inline bool cpu_has_work(CPUUniCore32State *env)
 186 {
 187     return env->interrupt_request &
 188         (CPU_INTERRUPT_HARD | CPU_INTERRUPT_EXITTB);
 189 }
 190
 191 #endif /* __CPU_UC32_H__ */