Commit e4280973 authored by Edgar E. Iglesias's avatar Edgar E. Iglesias
Browse files

mips: Correct VInt vector generation 



1. The pending need to pass the Status IM gating.
2. The priority is from seven (highest prio) down to zero.
   QEMU was doing the opposite.

Signed-off-by: default avatarEdgar E. Iglesias <edgar.iglesias@gmail.com>
parent bc45a67a

target-mips/helper.c

+3 −3
Original line number Diff line number Diff line
@@ -482,18 +482,18 @@ void do_interrupt (CPUState *env) 
            unsigned int vector;

            unsigned int pending = (env->CP0_Cause & CP0Ca_IP_mask) >> 8;



            pending &= env->CP0_Status >> 8;

            /* Compute the Vector Spacing.  */

            spacing = (env->CP0_IntCtl >> CP0IntCtl_VS) & ((1 << 6) - 1);

            spacing <<= 5;



            if (env->CP0_Config3 & (1 << CP0C3_VInt)) {

                /* For VInt mode, the MIPS computes the vector internally.  */

                for (vector = 0; vector < 8; vector++) {

                    if (pending & 1) {

                for (vector = 7; vector > 0; vector--) {

                    if (pending & (1 << vector)) {

                        /* Found it.  */

                        break;

                    }

                    pending >>= 1;

                }

            } else {

                /* For VEIC mode, the external interrupt controller feeds the