mptable.c

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/* SPDX-License-Identifier: GPL-2.0-or-later */
 
#include <arch/smp/mpspec.h>
#include <arch/ioapic.h>
 
static void *smp_write_config_table(void *v)
{
        int isa_bus;
        struct mp_config_table *mc;
 
        mc = (void *)(((char *)v) + SMP_FLOATING_TABLE_LEN);
 
        mptable_init(mc);
 
        smp_write_processors(mc);
 
        mptable_write_buses(mc, NULL, &isa_bus);
 
        /* External Intel 82093AA IOAPIC. */
        u8 ioapic_id = smp_write_ioapic_from_hw(mc, VIO_APIC_VADDR);
 
        /* Legacy Interrupts */
        mptable_add_isa_interrupts(mc, isa_bus, ioapic_id, 0);
 
        /* I/O Ints:          Type       Trigger                Polarity              Bus ID   IRQ   APIC ID      PIN# */
        smp_write_pci_intsrc(mc, mp_INT, 0x0, 0x04, 3, ioapic_id, 0x13);
        smp_write_pci_intsrc(mc, mp_INT, 0x0, 0x06, 0, ioapic_id, 0x13);
 
        /* Local Ints:        Type       Trigger                Polarity              Bus ID   IRQ   APIC ID      PIN# */
        mptable_lintsrc(mc, 0x1);
 
        /* Compute the checksums. */
        return mptable_finalize(mc);
}
 
unsigned long write_smp_table(unsigned long addr)
{
        void *v;
        v = smp_write_floating_table(addr, 0);
        return (unsigned long)smp_write_config_table(v);
}