| 39,7 → 39,6 |
|---|
| int excno; |
| __u32 epc; |
| __u32 epc_shift = 0; |
| pri_t pri; |
| |
| ASSERT(CPU != NULL); |
| |
| 50,12 → 49,12 |
|---|
| * On exit, exception bit must be set before cpu_priority_restore() is called. |
| */ |
| |
| pri = cpu_priority_high(); |
| cpu_priority_high(); |
| epc = cp0_epc_read(); |
| cp0_status_write(cp0_status_read() & ~ cp0_status_exl_exception_bit); |
| cp0_status_write(cp0_status_read() & ~ (cp0_status_exl_exception_bit | |
| cp0_status_um_bit)); |
| |
| if (THREAD) { |
| THREAD->saved_pri = pri; |
| THREAD->saved_epc = epc; |
| } |
| /* decode exception number and process the exception */ |
| 115,12 → 114,12 |
|---|
| panic("unhandled exception %d\n", excno); |
| } |
| |
| if (THREAD) { |
| pri = THREAD->saved_pri; |
| if (THREAD) |
| epc = THREAD->saved_epc; |
| } |
| |
| |
| /* Raise EXL bit before epc_write, so that we support |
| * properly nested exceptions |
| */ |
| cp0_status_write(cp0_status_read() | cp0_status_exl_exception_bit); |
| cp0_epc_write(epc + epc_shift); |
| cp0_status_write(cp0_status_read() | cp0_status_exl_exception_bit); |
| cpu_priority_restore(pri); |
| } |