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cris: Prepare for CRISv10. 

* Add prefix flag and special reg.
* Add interrupt lockout.
* Add CC_OP_MSTEP.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
This commit is contained in:
Edgar E. Iglesias 2010-02-15 11:17:33 +01:00
parent 204ff57128
commit fb9fb69231
2 changed files with 9 additions and 2 deletions
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3
cpu-exec.c
View File

@ -497,7 +497,8 @@ int cpu_exec(CPUState *env1)
}
#elif defined(TARGET_CRIS)
if (interrupt_request & CPU_INTERRUPT_HARD
&& (env->pregs[PR_CCS] & I_FLAG)) {
&& (env->pregs[PR_CCS] & I_FLAG)
&& !env->locked_irq) {
env->exception_index = EXCP_IRQ;
do_interrupt(env);
next_tb = 0;

8
target-cris/cpu.h
View File

@ -49,6 +49,7 @@
#define PR_WZ 4
#define PR_EXS 5
#define PR_EDA 6
#define PR_PREFIX 6 /* On CRISv10 P6 is reserved, we use it as prefix. */
#define PR_MOF 7
#define PR_DZ 8
#define PR_EBP 9
@ -62,6 +63,7 @@
/* CPU flags. */
#define Q_FLAG 0x80000000
#define M_FLAG 0x40000000
#define PFIX_FLAG 0x800 /* CRISv10 Only. */
#define S_FLAG 0x200
#define R_FLAG 0x100
#define P_FLAG 0x80
@ -121,6 +123,8 @@ typedef struct CPUCRISState {
/* X flag at the time of cc snapshot. */
int cc_x;
/* CRIS has certain insns that lockout interrupts. */
int locked_irq;
int interrupt_vector;
int fault_vector;
int trap_vector;
@ -180,6 +184,7 @@ enum {
CC_OP_MULS,
CC_OP_MULU,
CC_OP_DSTEP,
CC_OP_MSTEP,
CC_OP_BOUND,
CC_OP_OR,
@ -253,7 +258,8 @@ static inline void cpu_get_tb_cpu_state(CPUState *env, target_ulong *pc,
*pc = env->pc;
*cs_base = 0;
*flags = env->dslot |
(env->pregs[PR_CCS] & (S_FLAG | P_FLAG | U_FLAG | X_FLAG));
(env->pregs[PR_CCS] & (S_FLAG | P_FLAG | U_FLAG
| X_FLAG | PFIX_FLAG));
}
#endif