diff options
Diffstat (limited to 'src/sys/arch/amd64/cpu')
| -rw-r--r-- | src/sys/arch/amd64/cpu/vector.S | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/src/sys/arch/amd64/cpu/vector.S b/src/sys/arch/amd64/cpu/vector.S index 9969956..545a08d 100644 --- a/src/sys/arch/amd64/cpu/vector.S +++ b/src/sys/arch/amd64/cpu/vector.S @@ -112,10 +112,33 @@ irq_init_pins: IDT_SET_VEC 100, ioapic_edge_63 retq -/* XXX: STUB */ ioapic_common: + xor %rcx, %rcx // Start at zero +.walk: // Begin the table walk + lea g_intrs(%rip), %rbx // BASE -> RBX + lea (%rbx, %rcx, 8), %rbx // RBX+RCX*8 -> RBX + mov (%rbx), %rdx // *RBX -> RDX + or %rdx, %rdx // Is it NULL? + jz 1f // Yes + + mov (%rdx), %rbx // Get the handler + or %rbx, %rbx // Can we use this handler? + jz 1f // No, continue on + push %rcx // Save RCX between CALLs + call *%rbx // Indirect call + pop %rcx // We need RCX back now + + cmp $0, %rax // Do we continue? (not handled) + jg done // Nope, handled + +1: inc %rcx // Bump up RCX, next idx + cmp $256, %rcx // Are we through every? + jl .walk // Nope, continue +done: // End of loop + call lapic_eoi // Signal end of interrupt retq + INTR_ENTRY(ioapic_edge_0) call ioapic_common INTR_EXIT(ioapic_edge_0) |