mptable.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/device.h>
#include <arch/smp/mpspec.h>
#include <arch/ioapic.h>
 
static void *smp_write_config_table(void *v)
{
        struct mp_config_table *mc;
        struct device *riser = NULL, *firewire = NULL;
        int firewire_bus = 0, riser_bus = 0, isa_bus;
 
        mc = (void *)(((char *)v) + SMP_FLOATING_TABLE_LEN);
 
        mptable_init(mc);
 
        smp_write_processors(mc);
 
        firewire = dev_find_device(0x104c, 0x8023, 0);
        if (firewire) {
                firewire_bus = firewire->bus->secondary;
        }
 
        /* If a riser card is used, this riser is detected on bus 4, so its secondary bus is the */
        /* highest bus number on the pci bus. */
        riser = dev_find_device(0x3388, 0x0021, 0);
        if (!riser)
                riser = dev_find_device(0x3388, 0x0022, 0);
        if (riser) {
                riser_bus = riser->link_list->secondary;
        }
 
        mptable_write_buses(mc, NULL, &isa_bus);
 
        /* I/O APICs:   APIC ID Version State           Address */
        u8 ioapic_id = smp_write_ioapic_from_hw(mc, VIO_APIC_VADDR);
 
        /* Legacy Interrupts */
        mptable_add_isa_interrupts(mc, isa_bus, ioapic_id, 0);
 
        /* Builtin devices on Bus 0 */
        smp_write_pci_intsrc(mc, mp_INT, 0x0, 0x01, 0, ioapic_id, 0x10);
        smp_write_pci_intsrc(mc, mp_INT, 0x0, 0x02, 0, ioapic_id, 0x10);
        smp_write_pci_intsrc(mc, mp_INT, 0x0, 0x1f, 1, ioapic_id, 0x13);
        smp_write_pci_intsrc(mc, mp_INT, 0x0, 0x1d, 0, ioapic_id, 0x17);
        smp_write_pci_intsrc(mc, mp_INT, 0x0, 0x1d, 1, ioapic_id, 0x13);
        smp_write_pci_intsrc(mc, mp_INT, 0x0, 0x1d, 2, ioapic_id, 0x12);
        smp_write_pci_intsrc(mc, mp_INT, 0x0, 0x1d, 3, ioapic_id, 0x10);
        smp_write_pci_intsrc(mc, mp_INT, 0x0, 0x1b, 0, ioapic_id, 0x10);
        smp_write_pci_intsrc(mc, mp_INT, 0x0, 0x1c, 0, ioapic_id, 0x10);
        smp_write_pci_intsrc(mc, mp_INT, 0x0, 0x1c, 1, ioapic_id, 0x11);
 
        /* Internal PCI bus (Firewire, PCI slot) */
        if (firewire) {
                smp_write_pci_intsrc(mc, mp_INT, firewire_bus, 0x00, 0, ioapic_id, 0x10);
                smp_write_pci_intsrc(mc, mp_INT, firewire_bus, 0x01, 0, ioapic_id, 0x14);
        }
 
        if (riser) {
                /* Old riser card */
                /* riser slot top 5:8.0 */
                smp_write_pci_intsrc(mc, mp_INT, riser_bus, 0x08, 0, ioapic_id, 0x14);
                /* riser slot middle 5:9.0 */
                smp_write_pci_intsrc(mc, mp_INT, riser_bus, 0x09, 0, ioapic_id, 0x15);
                /* riser slot bottom 5:a.0 */
                smp_write_pci_intsrc(mc, mp_INT, riser_bus, 0x0a, 0, ioapic_id, 0x16);
 
                /* New Riser Card */
                smp_write_pci_intsrc(mc, mp_INT, riser_bus, 0x0c, 0, ioapic_id, 0x14);
                smp_write_pci_intsrc(mc, mp_INT, riser_bus, 0x0d, 0, ioapic_id, 0x15);
                smp_write_pci_intsrc(mc, mp_INT, riser_bus, 0x0e, 0, ioapic_id, 0x16);
        }
 
        /* PCIe slot */
        smp_write_pci_intsrc(mc, mp_INT, 0x1, 0x00, 0, ioapic_id, 0x10);
        smp_write_pci_intsrc(mc, mp_INT, 0x1, 0x00, 1, ioapic_id, 0x11);
 
        /* Onboard Ethernet */
        smp_write_pci_intsrc(mc, mp_INT, 0x2, 0x00, 0, ioapic_id, 0x10);
 
        /* Local Ints:  Type    Polarity    Trigger     Bus ID   IRQ    APIC ID PIN# */
        mptable_lintsrc(mc, isa_bus);
 
        /* Compute the checksums */
        return mptable_finalize(mc);
}
 
unsigned long write_smp_table(unsigned long addr)
{
        void *v;
        v = smp_write_floating_table(addr, 1);
        return (unsigned long)smp_write_config_table(v);
}