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Diffstat (limited to 'arch/x86/kernel/apic/apic.c')
-rw-r--r--arch/x86/kernel/apic/apic.c62
1 files changed, 0 insertions, 62 deletions
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index ad3639ae1b9b..dcb52850a28f 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1084,67 +1084,6 @@ void lapic_shutdown(void)
local_irq_restore(flags);
}
-/*
- * This is to verify that we're looking at a real local APIC.
- * Check these against your board if the CPUs aren't getting
- * started for no apparent reason.
- */
-int __init verify_local_APIC(void)
-{
- unsigned int reg0, reg1;
-
- /*
- * The version register is read-only in a real APIC.
- */
- reg0 = apic_read(APIC_LVR);
- apic_printk(APIC_DEBUG, "Getting VERSION: %x\n", reg0);
- apic_write(APIC_LVR, reg0 ^ APIC_LVR_MASK);
- reg1 = apic_read(APIC_LVR);
- apic_printk(APIC_DEBUG, "Getting VERSION: %x\n", reg1);
-
- /*
- * The two version reads above should print the same
- * numbers. If the second one is different, then we
- * poke at a non-APIC.
- */
- if (reg1 != reg0)
- return 0;
-
- /*
- * Check if the version looks reasonably.
- */
- reg1 = GET_APIC_VERSION(reg0);
- if (reg1 == 0x00 || reg1 == 0xff)
- return 0;
- reg1 = lapic_get_maxlvt();
- if (reg1 < 0x02 || reg1 == 0xff)
- return 0;
-
- /*
- * The ID register is read/write in a real APIC.
- */
- reg0 = apic_read(APIC_ID);
- apic_printk(APIC_DEBUG, "Getting ID: %x\n", reg0);
- apic_write(APIC_ID, reg0 ^ apic->apic_id_mask);
- reg1 = apic_read(APIC_ID);
- apic_printk(APIC_DEBUG, "Getting ID: %x\n", reg1);
- apic_write(APIC_ID, reg0);
- if (reg1 != (reg0 ^ apic->apic_id_mask))
- return 0;
-
- /*
- * The next two are just to see if we have sane values.
- * They're only really relevant if we're in Virtual Wire
- * compatibility mode, but most boxes are anymore.
- */
- reg0 = apic_read(APIC_LVT0);
- apic_printk(APIC_DEBUG, "Getting LVT0: %x\n", reg0);
- reg1 = apic_read(APIC_LVT1);
- apic_printk(APIC_DEBUG, "Getting LVT1: %x\n", reg1);
-
- return 1;
-}
-
/**
* sync_Arb_IDs - synchronize APIC bus arbitration IDs
*/
@@ -2283,7 +2222,6 @@ int __init APIC_init_uniprocessor(void)
disable_ioapic_support();
default_setup_apic_routing();
- verify_local_APIC();
apic_bsp_setup(true);
return 0;
}