1 /* Main header for the Hitachi h8/300 architecture. */
11 /* These define the size of main memory for the simulator.
13 Note the size of main memory for the H8/300H is only 256k. Keeping it
14 small makes the simulator run much faster and consume less memory.
16 The linker knows about the limited size of the simulator's main memory
17 on the H8/300H (via the h8300h.sc linker script). So if you change
18 H8300H_MSIZE, be sure to fix the linker script too.
20 Also note that there's a separate "eightbit" area aside from main
21 memory. For simplicity, the simulator assumes any data memory reference
22 outside of main memory refers to the eightbit area (in theory, this
23 can only happen when simulating H8/300H programs). We make no attempt
24 to catch overlapping addresses, wrapped addresses, etc etc. */
26 #define H8300_MSIZE (1 << 16)
29 Next 2 macros are ugly for any workstation, but while they're work.
30 Memory size MUST be configurable. */
31 #define H8300H_MSIZE (1 << 24)
32 #define H8300S_MSIZE (1 << 24)
46 SP_REGNUM = R7_REGNUM, /* Contains address of top of stack */
47 FP_REGNUM = R6_REGNUM, /* Contains address of executing
49 CCR_REGNUM = 8, /* Contains processor status */
50 PC_REGNUM = 9, /* Contains program counter */
65 OP_REG, /* Register direct. */
66 OP_LOWREG, /* Special reg syntax for "bra". */
67 OP_DISP, /* Register indirect w/displacement. */
68 /* Note: h8300, h8300h, and h8300s permit only pre-decr and post-incr. */
69 OP_PREDEC, /* Register indirect w/pre-decrement. */
70 OP_POSTDEC, /* Register indirect w/post-decrement. */
71 OP_PREINC, /* Register indirect w/pre-increment. */
72 OP_POSTINC, /* Register indirect w/post-increment. */
73 OP_PCREL, /* PC Relative. */
74 OP_MEM, /* Absolute memory address. */
75 OP_CCR, /* Condition Code Register. */
76 OP_IMM, /* Immediate value. */
77 /*OP_ABS*/ /* Un-used (duplicates op_mem?). */
78 OP_EXR, /* EXtended control Register. */
79 OP_SBR, /* Vector Base Register. */
80 OP_VBR, /* Short-address Base Register. */
81 OP_MACH, /* Multiply Accumulator - high. */
82 OP_MACL, /* Multiply Accumulator - low. */
83 /* FIXME: memory indirect? */
84 OP_INDEXB, /* Byte index mode */
85 OP_INDEXW, /* Word index mode */
86 OP_INDEXL /* Long index mode */
89 #include "sim-basics.h"
92 typedef unsigned32 sim_cia;
96 /* Structure used to describe addressing */
105 /* Struct for instruction decoder. */
116 struct h8_opcode *op;
121 unsigned int regs[20]; /* 8 GR's plus ZERO, SBR, and VBR. */
124 int macS; /* MAC Saturating mode */
125 int macV; /* MAC Overflow */
126 int macN; /* MAC Negative */
127 int macZ; /* MAC Zero */
130 char **command_line; /* Pointer to command line arguments. */
132 unsigned char *memory;
133 unsigned char *eightbit;
139 /* The sim_state struct. */
141 struct _sim_cpu *cpu;
142 unsigned int sim_cache_size;
143 decoded_inst *sim_cache;
144 unsigned short *cache_idx;
145 unsigned long memory_size;
154 /* The current state of the processor; registers, memory, etc. */
156 #define CIA_GET(CPU) (cpu_get_pc (CPU))
157 #define CIA_SET(CPU, VAL) (cpu_set_pc ((CPU), (VAL)))
158 #define STATE_CPU(SD, N) ((SD)->cpu) /* Single Processor. */
159 #define cpu_set_pc(CPU, VAL) (((CPU)->pc) = (VAL))
160 #define cpu_get_pc(CPU) (((CPU)->pc))
162 /* Magic numbers used to distinguish an exit from a breakpoint. */
163 #define LIBC_EXIT_MAGIC1 0xdead
164 #define LIBC_EXIT_MAGIC2 0xbeef
165 /* Local version of macros for decoding exit status.
166 (included here rather than try to find target version of wait.h)
168 #define SIM_WIFEXITED(V) (((V) & 0xff) == 0)
169 #define SIM_WIFSTOPPED(V) (!SIM_WIFEXITED (V))
170 #define SIM_WEXITSTATUS(V) (((V) >> 8) & 0xff)
171 #define SIM_WSTOPSIG(V) ((V) & 0x7f)
173 #endif /* SIM_MAIN_H */