target/hppa/cpu.h

   1 /*
   2  * PA-RISC emulation cpu definitions for qemu.
   3  *
   4  * Copyright (c) 2016 Richard Henderson <rth@twiddle.net>
   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
  20 #ifndef HPPA_CPU_H
  21 #define HPPA_CPU_H
  22
  23 #include "qemu-common.h"
  24 #include "cpu-qom.h"
  25
  26 /* We only support hppa-linux-user at present, so 32-bit only.  */
  27 #define TARGET_LONG_BITS 32
  28 #define TARGET_PHYS_ADDR_SPACE_BITS  32
  29 #define TARGET_VIRT_ADDR_SPACE_BITS  32
  30
  31 #define CPUArchState struct CPUHPPAState
  32
  33 #include "exec/cpu-defs.h"
  34 #include "fpu/softfloat.h"
  35
  36 #define TARGET_PAGE_BITS 12
  37
  38 #define ALIGNED_ONLY
  39 #define NB_MMU_MODES     1
  40 #define MMU_USER_IDX     0
  41 #define TARGET_INSN_START_EXTRA_WORDS 1
  42
  43 #define EXCP_SYSCALL     1
  44 #define EXCP_SYSCALL_LWS 2
  45 #define EXCP_SIGSEGV     3
  46 #define EXCP_SIGILL      4
  47 #define EXCP_SIGFPE      5
  48
  49 typedef struct CPUHPPAState CPUHPPAState;
  50
  51 struct CPUHPPAState {
  52     target_ulong gr[32];
  53     uint64_t fr[32];
  54
  55     target_ulong sar;
  56     target_ulong cr26;
  57     target_ulong cr27;
  58
  59     target_ulong psw_n;      /* boolean */
  60     target_long  psw_v;      /* in most significant bit */
  61
  62     /* Splitting the carry-borrow field into the MSB and "the rest", allows
  63      * for "the rest" to be deleted when it is unused, but the MSB is in use.
  64      * In addition, it's easier to compute carry-in for bit B+1 than it is to
  65      * compute carry-out for bit B (3 vs 4 insns for addition, assuming the
  66      * host has the appropriate add-with-carry insn to compute the msb).
  67      * Therefore the carry bits are stored as: cb_msb : cb & 0x11111110.
  68      */
  69     target_ulong psw_cb;     /* in least significant bit of next nibble */
  70     target_ulong psw_cb_msb; /* boolean */
  71
  72     target_ulong iaoq_f;     /* front */
  73     target_ulong iaoq_b;     /* back, aka next instruction */
  74
  75     target_ulong ior;        /* interrupt offset register */
  76
  77     uint32_t fr0_shadow;     /* flags, c, ca/cq, rm, d, enables */
  78     float_status fp_status;
  79
  80     /* Those resources are used only in QEMU core */
  81     CPU_COMMON
  82 };
  83
  84 /**
  85  * HPPACPU:
  86  * @env: #CPUHPPAState
  87  *
  88  * An HPPA CPU.
  89  */
  90 struct HPPACPU {
  91     /*< private >*/
  92     CPUState parent_obj;
  93     /*< public >*/
  94
  95     CPUHPPAState env;
  96 };
  97
  98 static inline HPPACPU *hppa_env_get_cpu(CPUHPPAState *env)
  99 {
 100     return container_of(env, HPPACPU, env);
 101 }
 102
 103 #define ENV_GET_CPU(e)  CPU(hppa_env_get_cpu(e))
 104 #define ENV_OFFSET      offsetof(HPPACPU, env)
 105
 106 #include "exec/cpu-all.h"
 107
 108 static inline int cpu_mmu_index(CPUHPPAState *env, bool ifetch)
 109 {
 110     return 0;
 111 }
 112
 113 void hppa_translate_init(void);
 114
 115 HPPACPU *cpu_hppa_init(const char *cpu_model);
 116
 117 #define cpu_init(cpu_model) CPU(cpu_hppa_init(cpu_model))
 118
 119 void hppa_cpu_list(FILE *f, fprintf_function cpu_fprintf);
 120
 121 static inline void cpu_get_tb_cpu_state(CPUHPPAState *env, target_ulong *pc,
 122                                         target_ulong *cs_base,
 123                                         uint32_t *pflags)
 124 {
 125     *pc = env->iaoq_f;
 126     *cs_base = env->iaoq_b;
 127     *pflags = env->psw_n;
 128 }
 129
 130 target_ulong cpu_hppa_get_psw(CPUHPPAState *env);
 131 void cpu_hppa_put_psw(CPUHPPAState *env, target_ulong);
 132 void cpu_hppa_loaded_fr0(CPUHPPAState *env);
 133
 134 #define cpu_signal_handler cpu_hppa_signal_handler
 135
 136 int cpu_hppa_signal_handler(int host_signum, void *pinfo, void *puc);
 137 int hppa_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int rw, int midx);
 138 int hppa_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
 139 int hppa_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 140 void hppa_cpu_do_interrupt(CPUState *cpu);
 141 bool hppa_cpu_exec_interrupt(CPUState *cpu, int int_req);
 142 void hppa_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function, int);
 143
 144 #endif /* HPPA_CPU_H */