| Line 34... |
Line 34... |
#include "debug.h"
|
#include "debug.h"
|
#include "spr-defs.h"
|
#include "spr-defs.h"
|
#include "execute.h"
|
#include "execute.h"
|
#include "debug-unit.h"
|
#include "debug-unit.h"
|
|
|
#if DYNAMIC_EXECUTION
|
|
#include "sched.h"
|
|
#include "op-support.h"
|
|
#endif
|
|
|
|
extern void op_join_mem_cycles(void);
|
extern void op_join_mem_cycles(void);
|
|
|
|
|
|
|
int except_pending = 0;
|
int except_pending = 0;
|
| Line 56... |
Line 51... |
oraddr_t except_vector;
|
oraddr_t except_vector;
|
|
|
if (debug_ignore_exception (except))
|
if (debug_ignore_exception (except))
|
return;
|
return;
|
|
|
#if !(DYNAMIC_EXECUTION)
|
|
/* In the dynamic recompiler, this function never returns, so this is not
|
/* In the dynamic recompiler, this function never returns, so this is not
|
* needed. Ofcourse we could set it anyway, but then all code that checks
|
* needed. Ofcourse we could set it anyway, but then all code that checks
|
* this variable would break, since it is never reset */
|
* this variable would break, since it is never reset */
|
except_pending = 1;
|
except_pending = 1;
|
#endif
|
|
|
|
except_vector =
|
except_vector =
|
except + (cpu_state.sprs[SPR_SR] & SPR_SR_EPH ? 0xf0000000 : 0x00000000);
|
except + (cpu_state.sprs[SPR_SR] & SPR_SR_EPH ? 0xf0000000 : 0x00000000);
|
|
|
#if !(DYNAMIC_EXECUTION)
|
|
pcnext = except_vector;
|
pcnext = except_vector;
|
#endif
|
|
|
|
cpu_state.sprs[SPR_EEAR_BASE] = ea;
|
cpu_state.sprs[SPR_EEAR_BASE] = ea;
|
cpu_state.sprs[SPR_ESR_BASE] = cpu_state.sprs[SPR_SR];
|
cpu_state.sprs[SPR_ESR_BASE] = cpu_state.sprs[SPR_SR];
|
|
|
cpu_state.sprs[SPR_SR] &= ~SPR_SR_OVE; /* Disable overflow flag exception. */
|
cpu_state.sprs[SPR_SR] &= ~SPR_SR_OVE; /* Disable overflow flag exception. */
|
| Line 81... |
Line 72... |
cpu_state.sprs[SPR_SR] &= ~(SPR_SR_IEE | SPR_SR_TEE); /* Disable interrupts. */
|
cpu_state.sprs[SPR_SR] &= ~(SPR_SR_IEE | SPR_SR_TEE); /* Disable interrupts. */
|
|
|
/* Address translation is always disabled when starting exception. */
|
/* Address translation is always disabled when starting exception. */
|
cpu_state.sprs[SPR_SR] &= ~SPR_SR_DME;
|
cpu_state.sprs[SPR_SR] &= ~SPR_SR_DME;
|
|
|
#if DYNAMIC_EXECUTION
|
|
/* If we were called from do_scheduler and there were more jobs scheduled to
|
|
* run after this, they won't run unless the following call is made since this
|
|
* function never returns. (If we weren't called from do_scheduler, then the
|
|
* job at the head of the queue will still have some time remaining) */
|
|
if (scheduler.job_queue->time <= 0)
|
|
do_scheduler ();
|
|
#endif
|
|
|
|
switch (except)
|
switch (except)
|
{
|
{
|
/* EPCR is irrelevent */
|
/* EPCR is irrelevent */
|
case EXCEPT_RESET:
|
case EXCEPT_RESET:
|
break;
|
break;
|
/* EPCR is loaded with address of instruction that caused the exception */
|
/* EPCR is loaded with address of instruction that caused the exception */
|
case EXCEPT_ITLBMISS:
|
case EXCEPT_ITLBMISS:
|
case EXCEPT_IPF:
|
case EXCEPT_IPF:
|
cpu_state.sprs[SPR_EPCR_BASE] = ea - (cpu_state.delay_insn ? 4 : 0);
|
cpu_state.sprs[SPR_EPCR_BASE] = ea - (cpu_state.delay_insn ? 4 : 0);
|
#if DYNAMIC_EXECUTION
|
|
op_join_mem_cycles ();
|
|
#endif
|
|
break;
|
break;
|
case EXCEPT_BUSERR:
|
case EXCEPT_BUSERR:
|
case EXCEPT_DPF:
|
case EXCEPT_DPF:
|
case EXCEPT_ALIGN:
|
case EXCEPT_ALIGN:
|
case EXCEPT_ILLEGAL:
|
case EXCEPT_ILLEGAL:
|
case EXCEPT_DTLBMISS:
|
case EXCEPT_DTLBMISS:
|
case EXCEPT_RANGE:
|
case EXCEPT_RANGE:
|
case EXCEPT_TRAP:
|
case EXCEPT_TRAP:
|
/* All these exceptions happen during a simulated instruction */
|
/* All these exceptions happen during a simulated instruction */
|
#if DYNAMIC_EXECUTION
|
|
/* Since these exceptions happen during a simulated instruction and this
|
|
* function jumps out to the exception vector the scheduler would never have
|
|
* a chance to run, therefore run it now */
|
|
run_sched_out_of_line ();
|
|
#endif
|
|
cpu_state.sprs[SPR_EPCR_BASE] =
|
cpu_state.sprs[SPR_EPCR_BASE] =
|
cpu_state.pc - (cpu_state.delay_insn ? 4 : 0);
|
cpu_state.pc - (cpu_state.delay_insn ? 4 : 0);
|
break;
|
break;
|
/* EPCR is loaded with address of next not-yet-executed instruction */
|
/* EPCR is loaded with address of next not-yet-executed instruction */
|
case EXCEPT_SYSCALL:
|
case EXCEPT_SYSCALL:
|
| Line 131... |
Line 104... |
* simulated, therefore the pc already points to the *next* instruction */
|
* simulated, therefore the pc already points to the *next* instruction */
|
case EXCEPT_TICK:
|
case EXCEPT_TICK:
|
case EXCEPT_INT:
|
case EXCEPT_INT:
|
cpu_state.sprs[SPR_EPCR_BASE] =
|
cpu_state.sprs[SPR_EPCR_BASE] =
|
cpu_state.pc - (cpu_state.delay_insn ? 4 : 0);
|
cpu_state.pc - (cpu_state.delay_insn ? 4 : 0);
|
#if !(DYNAMIC_EXECUTION)
|
|
/* If we don't update the pc now, then it will only happen *after* the next
|
/* If we don't update the pc now, then it will only happen *after* the next
|
* instruction (There would be serious problems if the next instruction just
|
* instruction (There would be serious problems if the next instruction just
|
* happens to be a branch), when it should happen NOW. */
|
* happens to be a branch), when it should happen NOW. */
|
cpu_state.pc = pcnext;
|
cpu_state.pc = pcnext;
|
pcnext += 4;
|
pcnext += 4;
|
#endif
|
|
break;
|
break;
|
}
|
}
|
|
|
/* Address trnaslation is here because run_sched_out_of_line calls
|
/* Address trnaslation is here because run_sched_out_of_line calls
|
* eval_insn_direct which checks out the immu for the address translation but
|
* eval_insn_direct which checks out the immu for the address translation but
|
| Line 153... |
Line 124... |
* exist and thus cpu_state.delay_insn would stick in the exception handler
|
* exist and thus cpu_state.delay_insn would stick in the exception handler
|
* causeing grief if the first instruction of the exception handler is also in
|
* causeing grief if the first instruction of the exception handler is also in
|
* the delay slot of the previous instruction */
|
* the delay slot of the previous instruction */
|
cpu_state.delay_insn = 0;
|
cpu_state.delay_insn = 0;
|
|
|
#if DYNAMIC_EXECUTION
|
|
do_jump (except_vector);
|
|
#endif
|
|
}
|
}
|
|
|
No newline at end of file
|
No newline at end of file
|
