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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Ported to Intel XE7501DEVKIT by Agami Aruma
* Ported to AOpen DXPL Plus-U by Kyösti Mälkki
*/
#include <acpi/acpi.h>
#include <device/pci_def.h>
#define IOAPIC_ICH4 2
#define IOAPIC_P64H2_BUS_B 3 /* IOAPIC 3 at 02:1c.0 */
#define IOAPIC_P64H2_BUS_A 4 /* IOAPIC 4 at 02:1e.0 */
#define INTEL_IOAPIC_NUM_INTERRUPTS 24 /* Both ICH-4 and P64-H2 */
unsigned long acpi_fill_madt(unsigned long current)
{
unsigned int irq_start = 0;
struct device *bdev, *dev = NULL;
struct resource* res = NULL;
/* SJM: Hard-code CPU LAPIC entries for now */
current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current, 0, 0);
current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current, 1, 6);
current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current, 2, 1);
current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current, 3, 7);
/* Southbridge IOAPIC */
current += acpi_create_madt_ioapic((acpi_madt_ioapic_t *)current, IOAPIC_ICH4,
0xfec00000, irq_start);
irq_start += INTEL_IOAPIC_NUM_INTERRUPTS;
bdev = pcidev_on_root(2, 0);
/* P64H2 Bus B IOAPIC */
if (bdev)
dev = pcidev_path_behind(bdev->link_list, PCI_DEVFN(28, 0));
if (dev) {
res = find_resource(dev, PCI_BASE_ADDRESS_0);
current += acpi_create_madt_ioapic((acpi_madt_ioapic_t *)current,
IOAPIC_P64H2_BUS_B, res->base, irq_start);
irq_start += INTEL_IOAPIC_NUM_INTERRUPTS;
}
/* P64H2 Bus A IOAPIC */
if (bdev)
dev = pcidev_path_behind(bdev->link_list, PCI_DEVFN(30, 0));
if (dev) {
res = find_resource(dev, PCI_BASE_ADDRESS_0);
current += acpi_create_madt_ioapic((acpi_madt_ioapic_t *)current,
IOAPIC_P64H2_BUS_A, res->base, irq_start);
irq_start += INTEL_IOAPIC_NUM_INTERRUPTS;
}
/* Map ISA IRQ 0 to IRQ 2 */
current += acpi_create_madt_irqoverride((acpi_madt_irqoverride_t *)current, 1, 0, 2, 0);
/* IRQ9 differs from ISA standard - ours is active high, level-triggered */
current += acpi_create_madt_irqoverride((acpi_madt_irqoverride_t *)current, 0, 9, 9, 0xD);
return current;
}
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