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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); |