summaryrefslogtreecommitdiff
path: root/src/mainboard/emulation/qemu-i440fx/mainboard.c
blob: bc97554442d6df9c0eff896032c6f35abab930f2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
/* SPDX-License-Identifier: GPL-2.0-only */

#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 void qemu_nb_read_resources(struct device *dev)
{
	pci_dev_read_resources(dev);

	if (CONFIG(ARCH_RAMSTAGE_X86_64)) {
		/* Reserve page tables in DRAM. FIXME: Remove once x86_64 page tables reside in CBMEM */
		reserved_ram_resource(dev, 0, CONFIG_ARCH_X86_64_PGTBL_LOC / KiB,
			(6 * 0x1000) / KiB);
	}
}

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

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