target-s390x/cpu.h

   1 /*
   2  * S/390 virtual CPU header
   3  *
   4  *  Copyright (c) 2009 Ulrich Hecht
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #ifndef CPU_S390X_H
  20 #define CPU_S390X_H
  21
  22 #define TARGET_LONG_BITS 64
  23
  24 #define ELF_MACHINE     EM_S390
  25
  26 #define CPUState struct CPUS390XState
  27
  28 #include "cpu-defs.h"
  29
  30 #include "softfloat.h"
  31
  32 #define NB_MMU_MODES 2
  33
  34 typedef union FPReg {
  35     struct {
  36 #ifdef WORDS_BIGENDIAN
  37         float32 e;
  38         int32_t __pad;
  39 #else
  40         int32_t __pad;
  41         float32 e;
  42 #endif
  43     };
  44     float64 d;
  45     uint64_t i;
  46 } FPReg;
  47
  48 typedef struct CPUS390XState {
  49     uint64_t regs[16];  /* GP registers */
  50
  51     uint32_t aregs[16]; /* access registers */
  52
  53     uint32_t fpc;       /* floating-point control register */
  54     FPReg fregs[16]; /* FP registers */
  55     float_status fpu_status; /* passed to softfloat lib */
  56
  57     struct {
  58         uint64_t mask;
  59         uint64_t addr;
  60     } psw;
  61
  62     int cc; /* condition code (0-3) */
  63
  64     uint64_t __excp_addr;
  65
  66     CPU_COMMON
  67 } CPUS390XState;
  68
  69 #if defined(CONFIG_USER_ONLY)
  70 static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
  71 {
  72     if (newsp)
  73         env->regs[15] = newsp;
  74     env->regs[0] = 0;
  75 }
  76 #endif
  77
  78 #define MMU_MODE0_SUFFIX _kernel
  79 #define MMU_MODE1_SUFFIX _user
  80 #define MMU_USER_IDX 1
  81 static inline int cpu_mmu_index (CPUState *env)
  82 {
  83     /* XXX: Currently we don't implement virtual memory */
  84     return 0;
  85 }
  86
  87 CPUS390XState *cpu_s390x_init(const char *cpu_model);
  88 int cpu_s390x_exec(CPUS390XState *s);
  89 void cpu_s390x_close(CPUS390XState *s);
  90
  91 /* you can call this signal handler from your SIGBUS and SIGSEGV
  92    signal handlers to inform the virtual CPU of exceptions. non zero
  93    is returned if the signal was handled by the virtual CPU.  */
  94 int cpu_s390x_signal_handler(int host_signum, void *pinfo,
  95                            void *puc);
  96 int cpu_s390x_handle_mmu_fault (CPUS390XState *env, target_ulong address, int rw,
  97                               int mmu_idx, int is_softmuu);
  98 #define cpu_handle_mmu_fault cpu_s390x_handle_mmu_fault
  99
 100 #define TARGET_PAGE_BITS 12
 101
 102 /* ??? This is certainly wrong for 64-bit s390x, but given that only KVM
 103    emulation actually works, this is good enough for a placeholder.  */
 104 #define TARGET_PHYS_ADDR_SPACE_BITS 32
 105 #define TARGET_VIRT_ADDR_SPACE_BITS 32
 106
 107 #ifndef CONFIG_USER_ONLY
 108 int s390_virtio_hypercall(CPUState *env);
 109 void kvm_s390_virtio_irq(CPUState *env, int config_change, uint64_t token);
 110 CPUState *s390_cpu_addr2state(uint16_t cpu_addr);
 111 #endif
 112
 113
 114 #define cpu_init cpu_s390x_init
 115 #define cpu_exec cpu_s390x_exec
 116 #define cpu_gen_code cpu_s390x_gen_code
 117
 118 #include "cpu-all.h"
 119
 120 #define EXCP_OPEX 1 /* operation exception (sigill) */
 121 #define EXCP_SVC 2 /* supervisor call (syscall) */
 122 #define EXCP_ADDR 5 /* addressing exception */
 123 #define EXCP_EXECUTE_SVC 0xff00000 /* supervisor call via execute insn */
 124
 125 static inline void cpu_get_tb_cpu_state(CPUState* env, target_ulong *pc,
 126                                         target_ulong *cs_base, int *flags)
 127 {
 128     *pc = env->psw.addr;
 129     /* XXX this is correct for user-mode emulation, but needs
 130      *     the asce register information as well when softmmu
 131      *     is implemented in the future */
 132     *cs_base = 0;
 133     *flags = env->psw.mask;
 134 }
 135
 136 /* Program Status Word.  */
 137 #define S390_PSWM_REGNUM 0
 138 #define S390_PSWA_REGNUM 1
 139 /* General Purpose Registers.  */
 140 #define S390_R0_REGNUM 2
 141 #define S390_R1_REGNUM 3
 142 #define S390_R2_REGNUM 4
 143 #define S390_R3_REGNUM 5
 144 #define S390_R4_REGNUM 6
 145 #define S390_R5_REGNUM 7
 146 #define S390_R6_REGNUM 8
 147 #define S390_R7_REGNUM 9
 148 #define S390_R8_REGNUM 10
 149 #define S390_R9_REGNUM 11
 150 #define S390_R10_REGNUM 12
 151 #define S390_R11_REGNUM 13
 152 #define S390_R12_REGNUM 14
 153 #define S390_R13_REGNUM 15
 154 #define S390_R14_REGNUM 16
 155 #define S390_R15_REGNUM 17
 156 /* Access Registers.  */
 157 #define S390_A0_REGNUM 18
 158 #define S390_A1_REGNUM 19
 159 #define S390_A2_REGNUM 20
 160 #define S390_A3_REGNUM 21
 161 #define S390_A4_REGNUM 22
 162 #define S390_A5_REGNUM 23
 163 #define S390_A6_REGNUM 24
 164 #define S390_A7_REGNUM 25
 165 #define S390_A8_REGNUM 26
 166 #define S390_A9_REGNUM 27
 167 #define S390_A10_REGNUM 28
 168 #define S390_A11_REGNUM 29
 169 #define S390_A12_REGNUM 30
 170 #define S390_A13_REGNUM 31
 171 #define S390_A14_REGNUM 32
 172 #define S390_A15_REGNUM 33
 173 /* Floating Point Control Word.  */
 174 #define S390_FPC_REGNUM 34
 175 /* Floating Point Registers.  */
 176 #define S390_F0_REGNUM 35
 177 #define S390_F1_REGNUM 36
 178 #define S390_F2_REGNUM 37
 179 #define S390_F3_REGNUM 38
 180 #define S390_F4_REGNUM 39
 181 #define S390_F5_REGNUM 40
 182 #define S390_F6_REGNUM 41
 183 #define S390_F7_REGNUM 42
 184 #define S390_F8_REGNUM 43
 185 #define S390_F9_REGNUM 44
 186 #define S390_F10_REGNUM 45
 187 #define S390_F11_REGNUM 46
 188 #define S390_F12_REGNUM 47
 189 #define S390_F13_REGNUM 48
 190 #define S390_F14_REGNUM 49
 191 #define S390_F15_REGNUM 50
 192 /* Total.  */
 193 #define S390_NUM_REGS 51
 194
 195 /* Pseudo registers -- PC and condition code.  */
 196 #define S390_PC_REGNUM S390_NUM_REGS
 197 #define S390_CC_REGNUM (S390_NUM_REGS+1)
 198 #define S390_NUM_PSEUDO_REGS 2
 199 #define S390_NUM_TOTAL_REGS (S390_NUM_REGS+2)
 200
 201
 202
 203 /* Program Status Word.  */
 204 #define S390_PSWM_REGNUM 0
 205 #define S390_PSWA_REGNUM 1
 206 /* General Purpose Registers.  */
 207 #define S390_R0_REGNUM 2
 208 #define S390_R1_REGNUM 3
 209 #define S390_R2_REGNUM 4
 210 #define S390_R3_REGNUM 5
 211 #define S390_R4_REGNUM 6
 212 #define S390_R5_REGNUM 7
 213 #define S390_R6_REGNUM 8
 214 #define S390_R7_REGNUM 9
 215 #define S390_R8_REGNUM 10
 216 #define S390_R9_REGNUM 11
 217 #define S390_R10_REGNUM 12
 218 #define S390_R11_REGNUM 13
 219 #define S390_R12_REGNUM 14
 220 #define S390_R13_REGNUM 15
 221 #define S390_R14_REGNUM 16
 222 #define S390_R15_REGNUM 17
 223 /* Access Registers.  */
 224 #define S390_A0_REGNUM 18
 225 #define S390_A1_REGNUM 19
 226 #define S390_A2_REGNUM 20
 227 #define S390_A3_REGNUM 21
 228 #define S390_A4_REGNUM 22
 229 #define S390_A5_REGNUM 23
 230 #define S390_A6_REGNUM 24
 231 #define S390_A7_REGNUM 25
 232 #define S390_A8_REGNUM 26
 233 #define S390_A9_REGNUM 27
 234 #define S390_A10_REGNUM 28
 235 #define S390_A11_REGNUM 29
 236 #define S390_A12_REGNUM 30
 237 #define S390_A13_REGNUM 31
 238 #define S390_A14_REGNUM 32
 239 #define S390_A15_REGNUM 33
 240 /* Floating Point Control Word.  */
 241 #define S390_FPC_REGNUM 34
 242 /* Floating Point Registers.  */
 243 #define S390_F0_REGNUM 35
 244 #define S390_F1_REGNUM 36
 245 #define S390_F2_REGNUM 37
 246 #define S390_F3_REGNUM 38
 247 #define S390_F4_REGNUM 39
 248 #define S390_F5_REGNUM 40
 249 #define S390_F6_REGNUM 41
 250 #define S390_F7_REGNUM 42
 251 #define S390_F8_REGNUM 43
 252 #define S390_F9_REGNUM 44
 253 #define S390_F10_REGNUM 45
 254 #define S390_F11_REGNUM 46
 255 #define S390_F12_REGNUM 47
 256 #define S390_F13_REGNUM 48
 257 #define S390_F14_REGNUM 49
 258 #define S390_F15_REGNUM 50
 259 /* Total.  */
 260 #define S390_NUM_REGS 51
 261
 262 /* Pseudo registers -- PC and condition code.  */
 263 #define S390_PC_REGNUM S390_NUM_REGS
 264 #define S390_CC_REGNUM (S390_NUM_REGS+1)
 265 #define S390_NUM_PSEUDO_REGS 2
 266 #define S390_NUM_TOTAL_REGS (S390_NUM_REGS+2)
 267
 268
 269 #endif