diff options
Diffstat (limited to 'c/src/lib/libbsp/sparc/shared/irq_asm.S')
| -rw-r--r-- | c/src/lib/libbsp/sparc/shared/irq_asm.S | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/c/src/lib/libbsp/sparc/shared/irq_asm.S b/c/src/lib/libbsp/sparc/shared/irq_asm.S index 7a595d1711..a842a62a1e 100644 --- a/c/src/lib/libbsp/sparc/shared/irq_asm.S +++ b/c/src/lib/libbsp/sparc/shared/irq_asm.S @@ -178,17 +178,22 @@ done_flushing: mov %g4, %wim #if defined(RTEMS_SMP) - ! The executing context no longer executes on this processor + /* + * The executing thread no longer executes on this processor. Switch + * the stack to the temporary interrupt stack of this processor. Mark + * the context of the executing thread as not executing. + */ + add %g6, PER_CPU_INTERRUPT_FRAME_AREA + CPU_INTERRUPT_FRAME_SIZE, %sp st %g0, [%o0 + SPARC_CONTEXT_CONTROL_IS_EXECUTING_OFFSET] ! Try to update the is executing indicator of the heir context mov 1, %g1 -try_update_is_executing: +.Ltry_update_is_executing: swap [%o1 + SPARC_CONTEXT_CONTROL_IS_EXECUTING_OFFSET], %g1 cmp %g1, 0 - bne check_is_executing + bne .Lcheck_is_executing ! The next load is in a delay slot, which is all right #endif @@ -225,12 +230,12 @@ try_update_is_executing: nop ! delay slot #if defined(RTEMS_SMP) -check_is_executing: +.Lcheck_is_executing: ! Check the is executing indicator of the heir context ld [%o1 + SPARC_CONTEXT_CONTROL_IS_EXECUTING_OFFSET], %g1 cmp %g1, 0 - beq try_update_is_executing + beq .Ltry_update_is_executing mov 1, %g1 ! We may have a new heir @@ -242,7 +247,7 @@ check_is_executing: ! Update the executing only if necessary to avoid cache line ! monopolization. cmp %g2, %g4 - beq try_update_is_executing + beq .Ltry_update_is_executing mov 1, %g1 ! Calculate the heir context pointer @@ -252,7 +257,7 @@ check_is_executing: ! Update the executing st %g4, [%g6 + PER_CPU_OFFSET_EXECUTING] - ba try_update_is_executing + ba .Ltry_update_is_executing mov 1, %g1 #endif |