src/mainboard/emulation/qemu-i440fx/mainboard.c

/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */

#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <pc80/keyboard.h>

static const unsigned char qemu_i440fx_irqs[] = {
	11, 10, 10, 11,
	11, 10, 10, 11,
};

static void qemu_nb_init(struct device *dev)
{
	/* Map memory at 0xc0000 - 0xfffff */
	int i;
	uint8_t v = pci_read_config8(dev, 0x59);
	v |= 0x30;
	pci_write_config8(dev, 0x59, v);
	for (i = 0; i < 6; i++)
	pci_write_config8(dev, 0x5a + i, 0x33);

	/* This sneaked in here, because Qemu does not
	 * emulate a SuperIO chip
	 */
	pc_keyboard_init(NO_AUX_DEVICE);

	/* setup IRQ routing */
	for (i = 0; i < 32; i++)
		pci_assign_irqs(pcidev_on_root(i, 0), qemu_i440fx_irqs + (i % 4));
}

static struct device_operations nb_operations = {
	.read_resources   = pci_dev_read_resources,
	.set_resources    = pci_dev_set_resources,
	.enable_resources = pci_dev_enable_resources,
	.init             = qemu_nb_init,
	.ops_pci          = 0,
};

static const struct pci_driver nb_driver __pci_driver = {
	.ops = &nb_operations,
	.vendor = 0x8086,
	.device = 0x1237,
};