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Changeset 5e4f22b in mainline


Ignore:
Timestamp:
2012-07-03T22:41:46Z (8 years ago)
Author:
Jakub Jermar <jakub@…>
Branches:
master
Children:
1f2dd20, 33fc3ae, 725d038, cc51c27
Parents:
bb4c9fca
Message:

When sending an IPI, wait for its successful delivery.

File:
1 edited

Legend:

Unmodified
Added
Removed
  • kernel/arch/ia32/src/smp/apic.c

    rbb4c9fca r5e4f22b  
    259259}
    260260
     261#define DELIVS_PENDING_SILENT_RETRIES   4       
     262
     263static void l_apic_wait_for_delivery(void)
     264{
     265        icr_t icr;
     266        unsigned retries = 0;
     267
     268        do {
     269                if (retries++ > DELIVS_PENDING_SILENT_RETRIES) {
     270                        retries = 0;
     271#ifdef CONFIG_DEBUG
     272                        printf("IPI is pending.\n");
     273#endif
     274                        delay(20);
     275                }
     276                icr.lo = l_apic[ICRlo];
     277        } while (icr.delivs == DELIVS_PENDING);
     278       
     279}
     280
    261281/** Send all CPUs excluding CPU IPI vector.
    262282 *
     
    279299       
    280300        l_apic[ICRlo] = icr.lo;
    281        
    282         icr.lo = l_apic[ICRlo];
    283         if (icr.delivs == DELIVS_PENDING) {
    284 #ifdef CONFIG_DEBUG
    285                 printf("IPI is pending.\n");
    286 #endif
    287         }
     301
     302        l_apic_wait_for_delivery();
    288303       
    289304        return apic_poll_errors();
     
    327342                return 0;
    328343       
     344        l_apic_wait_for_delivery();
     345
    329346        icr.lo = l_apic[ICRlo];
    330         if (icr.delivs == DELIVS_PENDING) {
    331 #ifdef CONFIG_DEBUG
    332                 printf("IPI is pending.\n");
    333 #endif
    334         }
    335        
    336347        icr.delmod = DELMOD_INIT;
    337348        icr.destmod = DESTMOD_PHYS;
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