diff options
| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2009-02-09 12:05:47 -0800 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy@goop.org> | 2009-02-09 14:04:26 -0800 |
| commit | c3e137d1e882c4fab9adcce7ae2be9bf3eb64c4c (patch) | |
| tree | 7451219c94644303457d0522d9366b802e33f7ea /arch/x86/kernel/acpi | |
| parent | 4924e228ae039029a9503ad571d91086e4042c90 (diff) | |
x86: add mp_find_ioapic_pin
Add mp_find_ioapic_pin() to find an IO APIC's specific pin from a GSI,
and use this function within acpi/boot. Make it non-static so other
code can use it too.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'arch/x86/kernel/acpi')
| -rw-r--r-- | arch/x86/kernel/acpi/boot.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 068b900f4b0..bba162c81d5 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -887,6 +887,16 @@ int mp_find_ioapic(int gsi) return -1; } +int mp_find_ioapic_pin(int ioapic, int gsi) +{ + if (WARN_ON(ioapic == -1)) + return -1; + if (WARN_ON(gsi > mp_ioapic_routing[ioapic].gsi_end)) + return -1; + + return gsi - mp_ioapic_routing[ioapic].gsi_base; +} + static u8 __init uniq_ioapic_id(u8 id) { #ifdef CONFIG_X86_32 @@ -1022,7 +1032,7 @@ void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) ioapic = mp_find_ioapic(gsi); if (ioapic < 0) return; - pin = gsi - mp_ioapic_routing[ioapic].gsi_base; + pin = mp_find_ioapic_pin(ioapic, gsi); /* * TBD: This check is for faulty timer entries, where the override @@ -1142,7 +1152,7 @@ int mp_register_gsi(u32 gsi, int triggering, int polarity) return gsi; } - ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base; + ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); #ifdef CONFIG_X86_32 if (ioapic_renumber_irq) @@ -1231,7 +1241,7 @@ int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin, mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); ioapic = mp_find_ioapic(gsi); mp_irq.dstapic = mp_ioapic_routing[ioapic].apic_id; - mp_irq.dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base; + mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); save_mp_irq(&mp_irq); #endif |