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/*

 * cpu.h -- execute instructions

 */

#ifndef _CPU_H_

#define _CPU_H_

#define PSW_V           0x08000000      /* interrupt vector bit in PSW */

#define PSW_UM          0x04000000      /* user mode enable bit in PSW */

#define PSW_PUM         0x02000000      /* previous value of PSW_UM */

#define PSW_OUM         0x01000000      /* old value of PSW_UM */

#define PSW_IE          0x00800000      /* interrupt enable bit in PSW */

#define PSW_PIE         0x00400000      /* previous value of PSW_IE */

#define PSW_OIE         0x00200000      /* old value of PSW_IE */

#define PSW_PRIO_MASK   0x001F0000      /* bits to encode IRQ prio in PSW */

Word cpuGetPC(void);

void cpuSetPC(Word addr);

Word cpuGetReg(int regnum);

void cpuSetReg(int regnum, Word value);

Word cpuGetPSW(void);

void cpuSetPSW(Word value);

Bool cpuTestBreak(void);

Word cpuGetBreak(void);

void cpuSetBreak(Word addr);

void cpuResetBreak(void);

char *exceptionToString(int exception);

void cpuStep(void);

void cpuRun(void);

#endif /* _CPU_H_ */