Subversion Repositories HelenOS-historic

Rev

Rev 1 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 1 Rev 15
Line 40... Line 40...
40 
   
 40 
   
41 
    pri = cpu_priority_high();
 41 
    pri = cpu_priority_high();
42 
    epc = cp0_epc_read();
 42 
    epc = cp0_epc_read();
43 
    cp0_status_write(cp0_status_read() & ~ cp0_status_exl_exception_bit);
 43 
    cp0_status_write(cp0_status_read() & ~ cp0_status_exl_exception_bit);
44 
 
 44 
 
45 
    if (the->thread) {
 45 
    if (THREAD) {
46 
        the->thread->saved_pri = pri;
 46 
        THREAD->saved_pri = pri;
47 
        the->thread->saved_epc = epc;
 47 
        THREAD->saved_epc = epc;
48 
    }
 48 
    }
49 
    /* decode exception number and process the exception */
 49 
    /* decode exception number and process the exception */
50 
    switch(excno = (cp0_cause_read()>>2)&0x1f) {
 50 
    switch(excno = (cp0_cause_read()>>2)&0x1f) {
51 
        case EXC_Int: interrupt(); break;
 51 
        case EXC_Int: interrupt(); break;
52 
        case EXC_TLBL:
 52 
        case EXC_TLBL:
53 
        case EXC_TLBS: tlb_invalid(); break;
 53 
        case EXC_TLBS: tlb_invalid(); break;
54 
        default: panic(PANIC "unhandled exception %d\n", excno); break;
 54 
        default: panic(PANIC "unhandled exception %d\n", excno); break;
55 
    }
 55 
    }
56 
   
 56 
   
57 
    if (the->thread) {
 57 
    if (THREAD) {
58 
        pri = the->thread->saved_pri;
 58 
        pri = THREAD->saved_pri;
59 
        epc = the->thread->saved_epc;
 59 
        epc = THREAD->saved_epc;
60 
    }
 60 
    }
61 
 
 61 
 
62 
    cp0_epc_write(epc);
 62 
    cp0_epc_write(epc);
63 
    cp0_status_write(cp0_status_read() | cp0_status_exl_exception_bit);
 63 
    cp0_status_write(cp0_status_read() | cp0_status_exl_exception_bit);
64 
    cpu_priority_restore(pri);
 64 
    cpu_priority_restore(pri);