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 ELF_MACHINE     0xFEED /* EM_MOXIE */
  32
  33 #define MOXIE_EX_DIV0        0
  34 #define MOXIE_EX_BAD         1
  35 #define MOXIE_EX_IRQ         2
  36 #define MOXIE_EX_SWI         3
  37 #define MOXIE_EX_MMU_MISS    4
  38 #define MOXIE_EX_BREAK      16
  39
  40 #include "exec/cpu-defs.h"
  41 #include "fpu/softfloat.h"
  42
  43 #define TARGET_PAGE_BITS 12     /* 4k */
  44
  45 #define TARGET_PHYS_ADDR_SPACE_BITS 32
  46 #define TARGET_VIRT_ADDR_SPACE_BITS 32
  47
  48 #define NB_MMU_MODES 1
  49
  50 typedef struct CPUMoxieState {
  51
  52     uint32_t flags;               /* general execution flags */
  53     uint32_t gregs[16];           /* general registers */
  54     uint32_t sregs[256];          /* special registers */
  55     uint32_t pc;                  /* program counter */
  56     /* Instead of saving the cc value, we save the cmp arguments
  57        and compute cc on demand.  */
  58     uint32_t cc_a;                /* reg a for condition code calculation */
  59     uint32_t cc_b;                /* reg b for condition code calculation */
  60
  61     void *irq[8];
  62
  63     CPU_COMMON
  64
  65 } CPUMoxieState;
  66
  67 #include "qom/cpu.h"
  68
  69 #define TYPE_MOXIE_CPU "moxie-cpu"
  70
  71 #define MOXIE_CPU_CLASS(klass) \
  72     OBJECT_CLASS_CHECK(MoxieCPUClass, (klass), TYPE_MOXIE_CPU)
  73 #define MOXIE_CPU(obj) \
  74     OBJECT_CHECK(MoxieCPU, (obj), TYPE_MOXIE_CPU)
  75 #define MOXIE_CPU_GET_CLASS(obj) \
  76     OBJECT_GET_CLASS(MoxieCPUClass, (obj), TYPE_MOXIE_CPU)
  77
  78 /**
  79  * MoxieCPUClass:
  80  * @parent_reset: The parent class' reset handler.
  81  *
  82  * A Moxie CPU model.
  83  */
  84 typedef struct MoxieCPUClass {
  85     /*< private >*/
  86     CPUClass parent_class;
  87     /*< public >*/
  88
  89     DeviceRealize parent_realize;
  90     void (*parent_reset)(CPUState *cpu);
  91 } MoxieCPUClass;
  92
  93 /**
  94  * MoxieCPU:
  95  * @env: #CPUMoxieState
  96  *
  97  * A Moxie CPU.
  98  */
  99 typedef struct MoxieCPU {
 100     /*< private >*/
 101     CPUState parent_obj;
 102     /*< public >*/
 103
 104     CPUMoxieState env;
 105 } MoxieCPU;
 106
 107 static inline MoxieCPU *moxie_env_get_cpu(CPUMoxieState *env)
 108 {
 109     return MOXIE_CPU(container_of(env, MoxieCPU, env));
 110 }
 111
 112 #define ENV_GET_CPU(e) CPU(moxie_env_get_cpu(e))
 113
 114 #define ENV_OFFSET offsetof(MoxieCPU, env)
 115
 116 MoxieCPU *cpu_moxie_init(const char *cpu_model);
 117 int cpu_moxie_exec(CPUMoxieState *s);
 118 void moxie_cpu_do_interrupt(CPUState *cs);
 119 void moxie_cpu_dump_state(CPUState *cpu, FILE *f,
 120                           fprintf_function cpu_fprintf, int flags);
 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 */