Commit 638c0411 authored by Cyrill Gorcunov's avatar Cyrill Gorcunov Committed by Ingo Molnar

x86: apic - unify init_bsp_APIC

- remove redundant read of APIC_LVR register in 64bit mode
- APIC is always integrated for 64bit mode so
  gcc will eliminate lapic_is_integrated call
Signed-off-by: default avatarCyrill Gorcunov <gorcunov@gmail.com>
Acked-by: default avatarMaciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 6f6da97f
......@@ -925,7 +925,7 @@ void __init sync_Arb_IDs(void)
*/
void __init init_bsp_APIC(void)
{
unsigned long value;
unsigned int value;
/*
* Don't do the setup now if we have a SMP BIOS as the
......@@ -946,11 +946,13 @@ void __init init_bsp_APIC(void)
value &= ~APIC_VECTOR_MASK;
value |= APIC_SPIV_APIC_ENABLED;
#ifdef CONFIG_X86_32
/* This bit is reserved on P4/Xeon and should be cleared */
if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
(boot_cpu_data.x86 == 15))
value &= ~APIC_SPIV_FOCUS_DISABLED;
else
#endif
value |= APIC_SPIV_FOCUS_DISABLED;
value |= SPURIOUS_APIC_VECTOR;
apic_write(APIC_SPIV, value);
......
......@@ -773,8 +773,6 @@ void __init init_bsp_APIC(void)
if (smp_found_config || !cpu_has_apic)
return;
value = apic_read(APIC_LVR);
/*
* Do not trust the local APIC being empty at bootup.
*/
......@@ -786,7 +784,15 @@ void __init init_bsp_APIC(void)
value = apic_read(APIC_SPIV);
value &= ~APIC_VECTOR_MASK;
value |= APIC_SPIV_APIC_ENABLED;
value |= APIC_SPIV_FOCUS_DISABLED;
#ifdef CONFIG_X86_32
/* This bit is reserved on P4/Xeon and should be cleared */
if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
(boot_cpu_data.x86 == 15))
value &= ~APIC_SPIV_FOCUS_DISABLED;
else
#endif
value |= APIC_SPIV_FOCUS_DISABLED;
value |= SPURIOUS_APIC_VECTOR;
apic_write(APIC_SPIV, value);
......@@ -795,6 +801,8 @@ void __init init_bsp_APIC(void)
*/
apic_write(APIC_LVT0, APIC_DM_EXTINT);
value = APIC_DM_NMI;
if (!lapic_is_integrated()) /* 82489DX */
value |= APIC_LVT_LEVEL_TRIGGER;
apic_write(APIC_LVT1, value);
}
......
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