#ifndef DCPU16_H_3XXIQQG2
#define DCPU16_H_3XXIQQG2
+#include <stdlib.h>
+
+/* the target system's concept of a word */
typedef unsigned short DCPU16_WORD;
+/* how much ram the system has */
+#define DCPU16_RAM 0x10000
+#define DCPU16_INTERRUPT_QUEUE_SIZE 256
+
+/* a self-contained dcpu16 core */
+struct dcpu16 {
+ 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[8]; /* system registers, a b c x y z i j */
+ DCPU16_WORD pc; /* program counter */
+ DCPU16_WORD sp; /* stack pointer */
+ DCPU16_WORD ex; /* overflow */
+ DCPU16_WORD ia; /* interrupt address */
+ 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;
+};
+
+/* these are used to define hardware attached to the system */
+struct dcpu16_hw {
+ char *name_;
+ DCPU16_WORD id_l;
+ DCPU16_WORD id_h;
+ DCPU16_WORD ver;
+ DCPU16_WORD mfg_l;
+ DCPU16_WORD mfg_h;
+ void (*int_fn)(struct dcpu16 *, void *);
+ void *data;
+};
+
+/* instantiate a new core */
+struct dcpu16 *dcpu16_new(void);
+
+/* reset a core to initial state */
+void dcpu16_reset(struct dcpu16 *);
+
+/* print the current state of a core */
+void dcpu16_state_print(struct dcpu16 *);
+
+/* print the contents of ram from second to third argument */
+void dcpu16_dump_ram(struct dcpu16 *, DCPU16_WORD, DCPU16_WORD);
+
+/* print words in buf as asm */
+DCPU16_WORD dcpu16_mnemonify_buf(DCPU16_WORD *);
+
+/* print the instruction at the specified address, returns number of words consumed in decoding */
+DCPU16_WORD dcpu16_disassemble_print(struct dcpu16 *, DCPU16_WORD);
+
+/* register new 'hardware' device with system */
+int dcpu16_hw_add(struct dcpu16 *, struct dcpu16_hw *);
+
+/* register a callback for an accounting event */
+int dcpu16_acct_add(struct dcpu16 *, dcpu16_acct_event, dcpu16_ev_cb_t *, void *);
+
+/* execute the next instruction */
+void dcpu16_step(struct dcpu16 *);
+
+/* release a core */
+void dcpu16_delete(struct dcpu16 **);
+
+/* register callbacks to handle warning and debug messages, default is writing to stderr, may be set to null */
+void dcpu16_warn_cb_set(void (*)(char *, ...));
+void dcpu16_trace_cb_set(void (*)(char *, ...));
+
#endif /* DCPU16_H_3XXIQQG2 */
projects / dcpu16 / blobdiff