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CRIS: Partial EXS reg support and fixes for SPC. 

* Add partial support for the EXS (exception status) register.
* Update SPC after each singlestep exception.
* Remove special treatment of break 8.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5448 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
edgar_igl 2008-10-08 14:22:17 +00:00
parent dd20fcd0ac
commit cddffe3739
2 changed files with 5 additions and 10 deletions
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3
target-cris/helper.c
View File

@ -143,6 +143,9 @@ void do_interrupt(CPUState *env)
break;
}
/* Fill in the IDX field. */
env->pregs[PR_EXS] = (ex_vec & 0xff) << 8;
if (env->dslot) {
D(fprintf(logfile, "excp isr=%x PC=%x ds=%d SP=%x"
" ERP=%x pid=%x ccs=%x cc=%d %x\n",

12
target-cris/translate.c
View File

@ -196,10 +196,6 @@ static inline void t_gen_mov_TN_preg(TCGv tn, int r)
tcg_gen_mov_tl(tn, tcg_const_tl(0));
else if (r == PR_VR)
tcg_gen_mov_tl(tn, tcg_const_tl(32));
else if (r == PR_EXS) {
printf("read from EXS!\n");
tcg_gen_mov_tl(tn, cpu_PR[r]);
}
else if (r == PR_EDA) {
printf("read from EDA!\n");
tcg_gen_mov_tl(tn, cpu_PR[r]);
@ -2811,12 +2807,7 @@ static unsigned int dec_rfe_etc(DisasContext *dc)
DIS(fprintf(logfile, "break %d\n", dc->op1));
cris_evaluate_flags (dc);
/* break. */
if (dc->op1 == 8) {
/* TODO: Find out whats special with brk8. */
tcg_gen_movi_tl(env_pc, dc->pc);
}
else
tcg_gen_movi_tl(env_pc, dc->pc + 2);
tcg_gen_movi_tl(env_pc, dc->pc + 2);
/* Breaks start at 16 in the exception vector. */
t_gen_mov_env_TN(trap_vector,
@ -3005,6 +2996,7 @@ cris_decoder(DisasContext *dc)
cris_evaluate_flags (dc);
t_gen_mov_env_TN(trap_vector, tcg_const_tl(3));
tcg_gen_movi_tl(env_pc, dc->pc + insn_len);
tcg_gen_movi_tl(cpu_PR[PR_SPC], dc->pc + insn_len);
t_gen_raise_exception(EXCP_BREAK);
gen_set_label(l1);
}