target-moxie/cpu.h

   1 /*
   2  *  Moxie emulation
   3  *
   4  *  Copyright (c) 2008, 2010, 2013 Anthony Green
   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 General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #ifndef _CPU_MOXIE_H
  20 #define _CPU_MOXIE_H
  21
  22 #include "config.h"
  23 #include "qemu-common.h"
  24
  25 #define TARGET_LONG_BITS 32
  26
  27 #define CPUArchState struct CPUMoxieState
  28
  29 #define TARGET_HAS_ICE 1
  30
  31 #define CPU_SAVE_VERSION 1
  32
  33 #define ELF_MACHINE     0xFEED /* EM_MOXIE */
  34
  35 #define MOXIE_EX_DIV0        0
  36 #define MOXIE_EX_BAD         1
  37 #define MOXIE_EX_IRQ         2
  38 #define MOXIE_EX_SWI         3
  39 #define MOXIE_EX_MMU_MISS    4
  40 #define MOXIE_EX_BREAK      16
  41
  42 #include "exec/cpu-defs.h"
  43 #include "fpu/softfloat.h"
  44
  45 #define TARGET_PAGE_BITS 12     /* 4k */
  46
  47 #define TARGET_PHYS_ADDR_SPACE_BITS 32
  48 #define TARGET_VIRT_ADDR_SPACE_BITS 32
  49
  50 #define NB_MMU_MODES 1
  51
  52 typedef struct CPUMoxieState {
  53
  54     uint32_t flags;               /* general execution flags */
  55     uint32_t gregs[16];           /* general registers */
  56     uint32_t sregs[256];          /* special registers */
  57     uint32_t pc;                  /* program counter */
  58     /* Instead of saving the cc value, we save the cmp arguments
  59        and compute cc on demand.  */
  60     uint32_t cc_a;                /* reg a for condition code calculation */
  61     uint32_t cc_b;                /* reg b for condition code calculation */
  62
  63     void *irq[8];
  64
  65     CPU_COMMON
  66
  67 } CPUMoxieState;
  68
  69 #include "qom/cpu.h"
  70
  71 #define TYPE_MOXIE_CPU "moxie-cpu"
  72
  73 #define MOXIE_CPU_CLASS(klass) \
  74     OBJECT_CLASS_CHECK(MoxieCPUClass, (klass), TYPE_MOXIE_CPU)
  75 #define MOXIE_CPU(obj) \
  76     OBJECT_CHECK(MoxieCPU, (obj), TYPE_MOXIE_CPU)
  77 #define MOXIE_CPU_GET_CLASS(obj) \
  78     OBJECT_GET_CLASS(MoxieCPUClass, (obj), TYPE_MOXIE_CPU)
  79
  80 /**
  81  * MoxieCPUClass:
  82  * @parent_reset: The parent class' reset handler.
  83  *
  84  * A Moxie CPU model.
  85  */
  86 typedef struct MoxieCPUClass {
  87     /*< private >*/
  88     CPUClass parent_class;
  89     /*< public >*/
  90
  91     DeviceRealize parent_realize;
  92     void (*parent_reset)(CPUState *cpu);
  93 } MoxieCPUClass;
  94
  95 /**
  96  * MoxieCPU:
  97  * @env: #CPUMoxieState
  98  *
  99  * A Moxie CPU.
 100  */
 101 typedef struct MoxieCPU {
 102     /*< private >*/
 103     CPUState parent_obj;
 104     /*< public >*/
 105
 106     CPUMoxieState env;
 107 } MoxieCPU;
 108
 109 static inline MoxieCPU *moxie_env_get_cpu(CPUMoxieState *env)
 110 {
 111     return MOXIE_CPU(container_of(env, MoxieCPU, env));
 112 }
 113
 114 #define ENV_GET_CPU(e) CPU(moxie_env_get_cpu(e))
 115
 116 #define ENV_OFFSET offsetof(MoxieCPU, env)
 117
 118 MoxieCPU *cpu_moxie_init(const char *cpu_model);
 119 int cpu_moxie_exec(CPUMoxieState *s);
 120 void do_interrupt(CPUMoxieState *env);
 121 void moxie_translate_init(void);
 122 int cpu_moxie_signal_handler(int host_signum, void *pinfo,
 123                              void *puc);
 124
 125 static inline CPUMoxieState *cpu_init(const char *cpu_model)
 126 {
 127     MoxieCPU *cpu = cpu_moxie_init(cpu_model);
 128     if (cpu == NULL) {
 129         return NULL;
 130     }
 131     return &cpu->env;
 132 }
 133
 134 #define cpu_exec cpu_moxie_exec
 135 #define cpu_gen_code cpu_moxie_gen_code
 136 #define cpu_signal_handler cpu_moxie_signal_handler
 137
 138 static inline int cpu_mmu_index(CPUMoxieState *env)
 139 {
 140     return 0;
 141 }
 142
 143 #include "exec/cpu-all.h"
 144 #include "exec/exec-all.h"
 145
 146 static inline void cpu_pc_from_tb(CPUMoxieState *env, TranslationBlock *tb)
 147 {
 148     env->pc = tb->pc;
 149 }
 150
 151 static inline void cpu_get_tb_cpu_state(CPUMoxieState *env, target_ulong *pc,
 152                                         target_ulong *cs_base, int *flags)
 153 {
 154     *pc = env->pc;
 155     *cs_base = 0;
 156     *flags = 0;
 157 }
 158
 159 static inline int cpu_has_work(CPUState *cpu)
 160 {
 161     return cpu->interrupt_request & CPU_INTERRUPT_HARD;
 162 }
 163
 164 int cpu_moxie_handle_mmu_fault(CPUMoxieState *env, target_ulong address,
 165                                int rw, int mmu_idx);
 166
 167 #endif /* _CPU_MOXIE_H */