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x86: update mptable

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make mptable to be consistent with acpi routing, so we could:

1. kexec kernel with acpi=off
2. work around BIOSes where acpi routing is working, but mptable is
   not right, so can use kernel/kexec to start other OSes that don't have
   good acpi support.

command line: update_mptable

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu
2008-06-01 13:17:38 -07:00
committed by Ingo Molnar
parent e8c27ac919
commit 2944e16b25
7 changed files with 445 additions and 17 deletions
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22
arch/x86/kernel/acpi/boot.c
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@ -1154,6 +1154,28 @@ int mp_register_gsi(u32 gsi, int triggering, int polarity)
return gsi;
}
int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
u32 gsi, int triggering, int polarity)
{
struct mpc_config_intsrc intsrc;
int ioapic;
/* print the entry should happen on mptable identically */
intsrc.mpc_type = MP_INTSRC;
intsrc.mpc_irqtype = mp_INT;
intsrc.mpc_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
(polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
intsrc.mpc_srcbus = number;
intsrc.mpc_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
ioapic = mp_find_ioapic(gsi);
intsrc.mpc_dstapic = mp_ioapic_routing[ioapic].apic_id;
intsrc.mpc_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
MP_intsrc_info(&intsrc);
return 0;
}
/*
* Parse IOAPIC related entries in MADT
* returns 0 on success, < 0 on error