OpenCores

Rev 8	Rev 25
Line 40...	Line 40...

`static Word pc; /* program counter */`	`static Word pc; /* program counter */`
`static Word psw; /* processor status word */`	`static Word psw; /* processor status word */`
`static Word r[32]; /* general purpose registers */`	`static Word r[32]; /* general purpose registers */`

`static int instrCount; /* counts instrs for timer tick */`
`static unsigned irqPending; /* one bit for each pending IRQ */`	`static unsigned irqPending; /* one bit for each pending IRQ */`

`static Bool breakSet; /* breakpoint set if true */`	`static Bool breakSet; /* breakpoint set if true */`
`static Word breakAddr; /* if breakSet, this is where */`	`static Word breakAddr; /* if breakSet, this is where */`

Line 57...	Line 56...


`/**************************************************************/`	`/**************************************************************/`


`static void handleRealTimeTasks(void) {`
`/* handle 'real-time' tasks */`
`if (++instrCount == INSTRS_PER_MSEC) {`
`instrCount = 0;`
`timerTick();`
`}`
`}`


`static void handleInterrupts(void) {`	`static void handleInterrupts(void) {`
`unsigned irqMask;`	`unsigned irqMask;`
`unsigned irqSeen;`	`unsigned irqSeen;`
`int priority;`	`int priority;`

Line 570...	Line 560...

`exception = setjmp(myEnvironment);`	`exception = setjmp(myEnvironment);`
`if (exception == 0) {`	`if (exception == 0) {`
`/* initialization */`	`/* initialization */`
`pushEnvironment(&myEnvironment);`	`pushEnvironment(&myEnvironment);`
`handleRealTimeTasks();`	`timerTick();`
`execNextInstruction();`	`execNextInstruction();`
`handleInterrupts();`	`handleInterrupts();`
`} else {`	`} else {`
`/* an exception was thrown */`	`/* an exception was thrown */`
`cpuSetInterrupt(exception);`	`cpuSetInterrupt(exception);`
Line 600...	Line 590...
`if (breakSet && pc == breakAddr) {`	`if (breakSet && pc == breakAddr) {`
`run = false;`	`run = false;`
`}`	`}`
`}`	`}`
`while (run) {`	`while (run) {`
`handleRealTimeTasks();`	`timerTick();`
`execNextInstruction();`	`execNextInstruction();`
`handleInterrupts();`	`handleInterrupts();`
`if (breakSet && pc == breakAddr) {`	`if (breakSet && pc == breakAddr) {`
`run = false;`	`run = false;`
`}`	`}`
Line 639...	Line 629...
`/* but not all */`	`/* but not all */`
`pc = startAddr;`	`pc = startAddr;`
`r[0] = 0;`	`r[0] = 0;`
`psw = 0;`	`psw = 0;`
`/* reset simulator control variables */`	`/* reset simulator control variables */`
`instrCount = 0;`
`irqPending = 0;`	`irqPending = 0;`
`total = 0;`	`total = 0;`
`}`	`}`

Line 40...

static Word pc;                 /* program counter */

static Word pc;                 /* program counter */

static Word psw;                /* processor status word */

static Word psw;                /* processor status word */

static Word r[32];              /* general purpose registers */

static Word r[32];              /* general purpose registers */

static int instrCount;          /* counts instrs for timer tick */

static unsigned irqPending;     /* one bit for each pending IRQ */

static unsigned irqPending;     /* one bit for each pending IRQ */

static Bool breakSet;           /* breakpoint set if true */

static Bool breakSet;           /* breakpoint set if true */

static Word breakAddr;          /* if breakSet, this is where */

static Word breakAddr;          /* if breakSet, this is where */

Line 57...

Line 56...

/**************************************************************/

/**************************************************************/

static void handleRealTimeTasks(void) {

  /* handle 'real-time' tasks */

  if (++instrCount == INSTRS_PER_MSEC) {

    instrCount = 0;

    timerTick();

static void handleInterrupts(void) {

static void handleInterrupts(void) {

  unsigned irqMask;

  unsigned irqMask;

  unsigned irqSeen;

  unsigned irqSeen;

  int priority;

  int priority;

Line 570...

Line 560...

  exception = setjmp(myEnvironment);

  exception = setjmp(myEnvironment);

  if (exception == 0) {

  if (exception == 0) {

    /* initialization */

    /* initialization */

    pushEnvironment(&myEnvironment);

    pushEnvironment(&myEnvironment);

    handleRealTimeTasks();

    timerTick();

    execNextInstruction();

    execNextInstruction();

    handleInterrupts();

    handleInterrupts();

  } else {

  } else {

    /* an exception was thrown */

    /* an exception was thrown */

    cpuSetInterrupt(exception);

    cpuSetInterrupt(exception);

Line 600...

Line 590...

    if (breakSet && pc == breakAddr) {

    if (breakSet && pc == breakAddr) {

      run = false;

      run = false;

  while (run) {

  while (run) {

    handleRealTimeTasks();

    timerTick();

    execNextInstruction();

    execNextInstruction();

    handleInterrupts();

    handleInterrupts();

    if (breakSet && pc == breakAddr) {

    if (breakSet && pc == breakAddr) {

      run = false;

      run = false;

Line 639...

Line 629...

  /* but not all */

  /* but not all */

  pc = startAddr;

  pc = startAddr;

  r[0] = 0;

  r[0] = 0;

  psw = 0;

  psw = 0;

  /* reset simulator control variables */

  /* reset simulator control variables */

  instrCount = 0;

  irqPending = 0;

  irqPending = 0;

  total = 0;

  total = 0;

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[/] [eco32/] [trunk/] [sim/] [cpu.c] - Diff between revs 8 and 25