- unsigned long long cycle; /* number of cycles this core has executed */
- DCPU16_WORD reg[8]; /* system registers, a b c x y z i j */
- DCPU16_WORD pc; /* program counter */
- DCPU16_WORD sp; /* stack pointer */
- DCPU16_WORD o; /* overflow */
- unsigned int skip_ : 1; /* skip execution of next instruction */
- DCPU16_WORD ram[DCPU16_RAM]; /* memory */
- DCPU16_WORD reg_work_[2]; /* (private) work registers for holding literal values while decoding instructions */
+ void (*warn_cb_)(char *fmt, ...);
+ void (*trace_cb_)(char *fmt, ...);
+
+ struct dcpu16_acct_cb *cb_table_; /* list of callbacks to invoke for certain events */
+ size_t cb_table_entries_; /* callback list maintenance */
+ size_t cb_table_allocated_; /* callback list maintenance */
+
+ struct dcpu16_hw *hw_table_; /* list of hardware attached to system */
+ size_t hw_table_entries_; /* hardware list maintenance */
+ size_t hw_table_allocated_; /* hardware list maintenance */
+
+ unsigned int skip_ : 1; /* skip execution of next instruction */
+ unsigned int interrupts_deferred_ : 1; /* queue software interrupts */
+ unsigned int on_fire_ : 1; /* cpu is on fire */
+ DCPU16_WORD reg_work_[2]; /* work registers for holding literal values while decoding instructions */
+ DCPU16_WORD interrupts_[DCPU16_INTERRUPT_QUEUE_SIZE]; /* fifo of pending interrupts */
+ size_t interrupts_head_; /* interrupt queue maintenance */
+ size_t interrupts_tail_; /* interrupt queue maintenance */
+
+ unsigned long long cycle; /* number of cycles this core has executed */
+ DCPU16_WORD reg[DCPU16_REG__NUM]; /* system registers, a b c x y z i j */
+ DCPU16_WORD ram[DCPU16_RAM]; /* memory */
+};
+
+/* these are used for accounting/watchpointing/modules/&c */
+typedef unsigned int dcpu16_acct_event;
+typedef void (dcpu16_ev_cb_t)(struct dcpu16 *, dcpu16_acct_event, DCPU16_WORD, void *);
+#define DCPU16_ACCT_EV_CYCLE (1<<1)
+#define DCPU16_ACCT_EV_READ (1<<2)
+#define DCPU16_ACCT_EV_WRITE (1<<3)
+#define DCPU16_ACCT_EV_NOP (1<<4)
+#define DCPU16_ACCT_EV_RESET (1<<5)
+struct dcpu16_acct_cb {
+ dcpu16_ev_cb_t *fn;
+ void *data;
+ dcpu16_acct_event mask;
+};
+
+typedef void (dcpu16_hw_signal_t)(struct dcpu16 *, void *);
+/* these are used to define hardware attached to the system */
+struct dcpu16_hw {
+ struct dcpu16 *vm; /* which system do I belong to */
+ char *name_;
+
+ DCPU16_WORD id_l;
+ DCPU16_WORD id_h;
+ DCPU16_WORD ver;
+ DCPU16_WORD mfg_l;
+ DCPU16_WORD mfg_h;
+
+ dcpu16_hw_signal_t *hwi;
+ dcpu16_hw_signal_t *cycle;
+ dcpu16_hw_signal_t *reset;
+ void *data;